SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16

of the Securities Exchange Act of 1934

For the month of May, 2018

Commission File Number: 001-37723

Enel Chile S.A.

(Translation of Registrant’s Name into English)

Santa Rosa 76

Santiago, Chile

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ☐            No  ☒

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes  ☐            No  ☒

Indicate by check mark whether by furnishing the information contained in this Form, the Registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934:

Yes  ☐            No  ☒

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): N/A

FORWARD-LOOKING STATEMENTS

This Report on Form 6-K (this “Report”) of Enel Chile S.A. (“Enel Chile”) contains statements that are or may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements appear throughout this Report and include statements regarding Enel Chile’s intent, belief or current expectations, including but not limited to any statements concerning:

Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Factors that could cause actual results to differ materially include, but are not limited to:

You should not place undue reliance on such statements, which speak only as of the date that they were made. Enel Chile’s independent registered public accounting firm has not examined or compiled the forward-looking statements and, accordingly, does not provide any assurance with respect to such statements. You should consider these cautionary statements together with any written or oral forward-looking statements that we may issue in the future. Enel Chile does not undertake any obligation to release publicly any revisions to forward-looking statements contained in this Report to reflect later events or circumstances or to reflect the occurrence of unanticipated events.

For all these forward-looking statements, we claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995.

Enel Chile is filing this Report to furnish the following exhibits.

Exhibits

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: May 30, 2018

Exhibit 99.1

Enel Chile S.A. and Subsidiaries

Unaudited Interim Consolidated Financial Statements as of March 31, 2018

Index to the Unaudited Consolidated Financial Statements

Consolidated Financial Statements:

ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Financial Position

As of March 31, 2018 and December 31, 2017

(In thousands of Chilean pesos - ThCh)

The accompanying notes are an integral part of these interim consolidated financial statements

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ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Financial Position

As of March 31, 2018 and December 31, 2017

(In thousands of Chilean pesos - ThCh)

The accompanying notes are an integral part of these interim consolidated financial statements

2

ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Comprehensive Income, by Nature

For the three-month periods ended March 31, 2018 and 2017

(In thousands of Chilean pesos - ThCh)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

The accompanying notes are an integral part of these interim consolidated financial statements

3

ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Comprehensive Income, by Nature (continued)

For the three-month periods ended March 31, 2018 and 2017

(In thousands of Chilean pesos - ThCh)

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

The accompanying notes are an integral part of these interim consolidated financial statements

4

ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Changes in Equity

For the three-month periods ended March 31, 2018 and 2017

(In thousands of Chilean pesos - ThCh)

The accompanying notes are an integral part of these interim consolidated financial statements

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ENEL CHILE S.A. AND SUBSIDIARIES

Unaudited Interim Consolidated Statements of Cash Flows, Direct

For the three-month periods ended March 31, 2018 and 2017

(In thousands of Chilean pesos - ThCh)

The accompanying notes are an integral part of these interim consolidated financial statements

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ENEL CHILE S.A. AND SUBSIDIARIES

NOTES TO THE INTERIM CONSOLIDATED FINANCIAL STATEMENTS

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ENEL CHILE S.A. AND ITS SUBSIDIARIES

UNAUDITED INTERIM CONSOLIDATED FINANCIAL STATEMENTS AS OF MARCH 31, 2018

(In thousands of Chilean pesos - ThCh)

Enel Chile S.A. (hereinafter the “Parent Company” or the “Company”) and its subsidiaries comprise the Enel Chile Group (hereinafter the “Group”).

The Company is a publicly traded corporation with registered address and head office located at Avenida Santa Rosa, No. 76, in Santiago, Chile. Since April 13, 2016, the Company is registered in the securities register of the Financial Market Commission of Chile (“Comisión para el Mercado Financiero” or “CMF”, formerly the Chilean Superintendence of Securities and Insurance, “Superintendencia de Valores y Seguros” or “SVS”) and since March 31, 2016 is registered with the Securities and Exchange Commission of the United States of America. On April 21, 2016, the Company’s shares began trading on the Santiago Stock Exchange, the Electronic Stock Exchange and the Valparaíso Stock Exchange. In addition, the Company’s common stock began trading in the United States in the form of American Depositary Shares on the New York Stock Exchange by way of “when-issued” trading from April 21, 2016 to April 26, 2017 and “regular-way” trading since April 27, 2016.

Enel S.p.A. (hereinafter “Enel”), an Italian generation company, is the ultimate controlling shareholder of the Company.

The Company was initially incorporated by public deed dated January 22, 2016 and came into legal existence on March 1, 2016 under the name of Enersis Chile S.A. The Company changed its name to Enel Chile S.A. effective October 4, 2016, the date its by-laws were amended in connection with the corporate reorganization of the Group. For tax purposes, the Company operates under Chilean tax identification number 76.536.353-5.

As of March 31, 2018, the Group had 1,919 employees. During the three-month period ended March 31, 2018, the Group averaged a total of 1,950 employees (see Note 34).

Enel Chile’s corporate purpose consists of exploring, developing, operating, generating, distributing, transporting, transforming and/or sale of energy in any of its forms or nature, directly or through other entities within Chile. Additionally, it is also engaged in investing and managing its investments in its subsidiaries and associates, whose activities include the generation, transmission, distribution or selling of electrical energy, or whose corporate purpose includes any of the following:

Corporate Reorganizations

In 2015, Enersis S.A. (“Enersis”), which was ultimately controlled and 60.6% beneficially owned by Enel, initiated a reorganization process to separate its electricity generation and distribution businesses and related assets and liabilities in Chile from its generation, transmission and distribution businesses in Argentina, Brazil, Colombia and Peru (the “Reorganization”).

The Reorganization began with the spin-offs by Enersis and its subsidiaries, Empresa Nacional de Electricidad S.A. (“Endesa Chile”) and Chilectra S.A. (“Chilectra”), following the approval of the spin-offs by the respective shareholders of Enersis, Endesa Chile and Chilectra at their extraordinary shareholders’ meetings held on December 18, 2015.

Endesa Chile conducted a “división” or “demerger” under Chilean corporate law to divide Endesa Chile into two separate companies. The new company, Endesa Américas S.A. (“Endesa Américas”), was assigned Endesa Chile’s non-Chilean businesses and related assets and liabilities on March 1, 2016 (the “Separation”). Endesa Américas registered its shares with the Securities Registry of the SVS pursuant to Chilean law and with the U.S. Securities and Exchange Commission (the “SEC”) pursuant to applicable U.S. federal securities laws, and on April 21, 2016, Endesa Chile distributed shares of Endesa Américas to its shareholders in proportion to such shareholders’ share ownership in Endesa Chile based on a ratio of one share of Endesa Américas for each outstanding share of Endesa Chile (the “Distribution”, and together with the Separation, the “Spin-Off”). Following the Spin-Off, Endesa Chile retained its Chilean businesses and related assets and liabilities.

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Chilectra, a Chilean electricity distribution company and subsidiary of Enersis, also conducted a “división” or “demerger” and then distributed to its shareholders pro rata the shares of a new Chilean company, Chilectra Américas S.A. (“Chilectra Américas”), that holds the non-Chilean equity interests and related assets and liabilities, which consists exclusively of Chilectra’s ownership interests in shares of companies domiciled outside of Chile (the “Chilectra Spin-Off” and together with the Spin-Off, the “Endesa/Chilectra Spin-Offs”). Chilectra Américas registered its shares with the Securities Registry of the SVS pursuant to Chilean law and Chilectra continues to hold its Chilean businesses and related assets and liabilities.

In connection with the “demergers” of Endesa Chile and Chilectra, Enersis conducted a “división” or “demerger”. Following the Endesa/Chilectra Spin-Offs, Enersis distributed to its shareholders pro rata the shares of a new Chilean company, Enersis Chile S.A. (“Enersis Chile”), that was assigned the Chilean businesses and assets, including the equity interests in each of Endesa Chile and Chilectra, after giving effect to the “demergers” of Endesa Chile and Chilectra (the “Enersis Spin-Off”). On March 1, 2016, having satisfied all conditions precedent including the capital decrease and modifications to the by-laws, the Enersis Spin-Off became effective and Enersis S.A.’s corporate name was changed to Enersis Américas S.A. The new entity Enersis Chile was also incorporated on that date and allocated the equity interest and related assets and liabilities of Enersis’ businesses in Chile. Enersis Chile registered its shares with the Securities Registry of the SVS pursuant to Chilean law and the SEC pursuant to applicable U.S. federal securities laws in connection with the Enersis Spin-Off, which was completed in April 2016.

As part of the Enersis Spin-Off, it was agreed that Enersis’ share capital would be reduced from Ch$5,804,447,986,000 divided into 49,092,772,762 registered common shares of a single series with no par value, to Ch$3,575,339,011,549 divided into 49,092,772,762 registered common shares of a single series with no par value. Additionally, it was agreed that (i) Enersis Chile’s share capital would be Ch$2,229,108,974,451, which corresponds to the amount by which the Enersis share capital would be decreased, divided into 49,092,772,762 registered common shares of a single series with no par value, and (ii) Enersis’ equity interest would be distributed between Enersis Américas and Enersis Chile by allocating assets and liabilities to Enersis Chile, as agreed at the extraordinary shareholders’ meeting held on December 18, 2015.

On October 4, 2016, the respective by-laws were amended and the corporate names of Enersis Chile, Endesa Chile and Chilectra were changed to Enel Chile S.A., Enel Generación Chile S.A. and Enel Distribución Chile S.A., respectively.

Considering the high priority of renewable energy in the Open Power strategy of Enel Chile and with the intention to strengthen this strategy, on August 25, 2017 Enel Chile proposed a corporate regonization (the “Renewable Assets Reorganization”) to consolidate Enel S.p.A.’s renewable Assets Reorganization is intended to incorporate the renewable energy assets in Chile held through Enel Green Power Latin America S.A. (“EGPL”) with Enel Chile, which in turn, holds conventional energy generation assets in Chile through Enel Generación Chile S.A. (“Enel Generación Chile”) and distribution assets in Chile through Enel Distribución Chile.

Enel Chile and Enel Generación Chile are both reporting companies under the regulation of the Chilean CMF and have American Depositary Receipts traded on the New York Stock Exchange, therefore are also subject to rules of the United States Securities and Exchange Commission (the “SEC”).

EGPL is a wholly owned subsidiary of Enel, held through Enel Green Power S.p.A. (“EGP”).

The Renewable Assets Reorganization involves the following transactions, each of which is conditional on the implementation of the other:

Enel Chile made a public tender offer (the “Tender Offer”) for all of the shares (including American Depositary Shares or “ADSs” of its subsidiary Enel Generación Chile S.A. (“Enel Generación Chile”) held by non-controlling interests (equivalent to approximately 40% of the share capital). The Tender Offer consideration will be paid in cash, subject to the condition that tendering Enel Generación Chile shareholders agree to use Ch$236 of the Ch$590 cash tender offer consideration for each Enel Generación Chile share and Ch$$7,080 of the Ch$17,700 cash tender offer consideration for each Enel Generación Chile ADS to subscribe for shares American Depositary Shares (or “ADSs”) of Enel Chile at a subscription price of Ch$82 per Enel Chile share (or Ch$4,100 per Enel Chile ADS) the “Share/ADS Subscription Condition”.

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The Tender Offer will be accounted for as the acquisition of the non-controlling interests in Enel Generación Chile. The transaction represents a change in Enel Chile’s ownership over Enel Generación Chile without resulting in a loss of control, the reason for which it is accounted for as an equity transaction in accordance with IFRS as issued by the IASB.

Enel Chile conducted a capital increase (the “Capital Increase”) in order to have a sufficient number of shares of common stock of Enel Chile available to deliver to tendering holders of Enel Generación Chile shares and ADSs to satisfy the Share/ADS Subscription Condition.

In connection with the Capital Increase, in accordance with Chilean law, Enel Chile made a preemptive rights offering to existing shareholders of Enel Chile who have preemptive rights to subscribe for the additional shares of Enel Chile issued in the Capital Increase pro rata in proportions to their interest in Enel Chile at a subscription price of Ch$82 per Enel Chile share in cash.

Following the completion of the Tender Offer, EGPL will merge into Enel Chile (the “Merger”). Consequently, the renewable assets held by EGPL will be consolidated by Enel Chile.

Based on the final share subscription price of Ch$82 per Enel Chile share in the Tender Offer and the exchange ratio of 15.8 Enel Chile shares per EGPL share in the Merger, Enel is expected to hold, taken together, an ownership interest in Enel Chile similar to its current 60.6% ownership.

The Merger will be accounted for as a combination of entities under common control of Enel, similar to a pooling of interests, effected by Enel Chile through issuance of its shares to be delivered to EGP as consideration of the proposed merger of EGPL. As Enel Chile and EGPL are under common control of Enel, no purchase accounting is applied.

At the Extraordinary Shareholders’ Meeting of Enel Chile held on December 20, 2017, the Renewable Assets Reorganization was approved, subject to compliance with the conditions stipulated for the Tender Offer, Capital Increase and Merger. In addition, the Shareholders’ Meeting also approved the Capital Increase in Enel Chile of Ch$1,891,727,278,668 through issuance of 23,069,844,862 new registed common shares of a single series with no par value, at a share price and under the conditions approved at the Shareholders’ Meeting.

On March 25, 2018 the amendments of the by-laws of Enel Chile in order to reflect the Merger-related agreements, Capital Increase and expansion of the corporate purpose of Enel Chile, among other provisions, became effective. The Tender Offer occurred between February 16, 2018 and March 22, 2018, the preemptive right offering in connection with the Capital Increase took place between February 15, 2018 and March 16, 2018 and the Renewable Assets Reorganization (including the Merger) was completed and effective on April 2, 2018, and resulted in an increase of Enel Chile’s ownership of Enel Generación Chile from 59.98% to 93.55% and an increase of Enel S.p.A.’s ownership interest in Enel Chile to 61.9% (excluding treasury stock which will be cancelled).

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2.1 Basis of preparation

The accompanying interim consolidated financial statements as of March 31, 2018 of Enel Chile approved by the Company’s Board of Directors at its meeting held on May 28, 2018, have been prepared in accordance with International Financial Reporting Standards (“IFRS”) as issued by the International Accounting Standards Board (“IASB”).

These interim financial statements include all information and disclosures required in annual financial statements.

These consolidated financial statements are presented in thousands of Chilean pesos (unless otherwise stated) which is the Company’s functional and presentation currency.

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2.2 New accounting pronouncements

The amendments and improvements to the standards, which came into effect on January 1, 2018, had no significant effect on the interim consolidated financial statements of the Company and its subsidiaries.

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The following is a summary of the application of the new accounting standards applicable as of 2018:

The IFRS 9 entered into force as of January 1, 2018, replacing IAS 39, and its application has not generated significant impacts in the interim consolidated financial statements of Enel Chile. The Group carried out a detailed assessment of the three aspects of the standard and its impact on the Group’s interim consolidated financial statements summarized as follows:

IFRS 9 introduced a new classification approach for financial assets, based on two concepts: the characteristics of the contractual cash flows of the financial assets and the business model of the entity. Under this new approach, the four classification categories of IAS 39 were replaced by the following three categories:

For financial liabilities, IFRS 9 retains largely the existing requirements in IAS 39, with certain specific modifications, under which most of the financial liabilities are measured at amortized cost, and allowing to designate a financial liability to be measure at fair value through profit or loss, if certain criteria are met.

However, IFRS 9 introduced new requirements for financial liabilities designated at fair value through profit or loss, which states that under certain circumstances, changes in fair value originated by the variation of an entity’s own credit risk will be recognized in other comprehensive income.

Based on the assessment made, the Group has determined that the new classification requirements do not have a significant impact on the accounting of its financial assets. Loans and receivables are held to collect contractual cash flows that are solely payment of principal and interest, therefore, they meet the criteria to be measured at amortized cost under IFRS 9. Investments in equity instruments classified as available for sale will continue to be measured at fair value through other comprehensive income, except for those where the cost represents the best estimate of their fair value.

The new impairment model in IFRS 9 is based on expected credit losses, as opposed to the incurred loss model in IAS 39. Consequently, under IFRS 9 impairment losses will be recognized, generally, earlier than previous practice.

The new impairment model is applied to financial assets measured at amortized cost and those measured at fair value through other comprehensive income, except for investments in equity instruments. The allowance for impairment losses are measured based on:

The standard allows the application of a simplified approach for trade receivables, contract assets and lease receivables so that the impairment is always recognized in reference to the lifetime expected credit losses for the asset. The Group has chosen to apply this policy for the designated financial assets.

On January 1, 2018, due to the application of the new impairment model, the Group recognized a charge net of taxes to its retained earnings of ThCh$3,224,949.

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IFRS 9 introduced a new model for hedge accounting in order to more closely align the accounting treatment with risk management activities of the entities and to establish a new principle-based approach. The new model allows entities to better reflect risk management activities in the financial statements, and allow more items to be eligible as hedged items, such as non-financial risk component, net positions, and aggregated exposures (i.e., a combination of derivative and non-derivative exposure).

The most significant changes in relation to hedging instruments compared to hedge accounting methodology in IAS 39, is the possibility to defer in other comprehensive income the time value of options, forward points in forward contracts, and foreign currency basis spread, until the hedged item impacts profit or loss.

IFRS 9 also eliminated the quantitative requirement for hedge effectiveness test contemplated in IAS 39, under which the results should be within a range of 80-125 percent. This will allow aligning hedge effectiveness with risk management by demonstrating the existence of an economic relationship between the hedging instrument and the hedged item. However, retrospective ineffectiveness should continue to be valued and recognized in results.

When initially applying IFRS 9, the Group could choose as its accounting policy to continue to apply the hedge accounting requirements of IAS 39 instead of the requirements in IFRS 9, until the time the new requirements on macro-hedging are published and adopted. The Group’s chose to apply the new requirements of IFRS 9 on the date of its adiption, that is, January 1, 2018.

As of January 1, 2018, the application of the new hedge accounting model has had no impact on the group’s consolidated financial statements.

The IFRS 15 apply to all contracts with customers, with certain exemptions (lease contracts and insurance, financial instruments, and non-monetary exchanges), and as of January 1, 2018 superseded all revenue recognition standards:

This new Standard introduced a general framework for recognition and measurement of revenue, based on the core principle that revenues are recognized for an amount that reflects the consideration to which the entity expects to be entitled in exchange for transferring promised goods or services to customers. This core principle shall be applied using a five-step approach to revenue recognition: (1) identify the contract with a customer; (2) identify the performance obligations in the contract; (3) determine the transaction price; (4) allocate the transaction price to the performance obligations in the contracts; and (5) recognize revenue when (or as) the entity satisfies a performance obligation.

IFRS 15 requires more detailed disclosures than the current requirements. The disclosure requirements represent a significant change as compared to current practice and increase significantly the volume of disclosures included in the Group’s financial statements.

The Group carried out an implementation project to identify and measure the potential impact of applying IFRS 15 on its consolidated financial statements. The project included the identification of all revenue streams of Enel Chile and its subsidiaries, use of our knowledge of the customary business practices, a comprehensive evaluation of each type of contract with clients and determining the methodology for recognizing revenue under current standards. The assessment was performed with a special focus on those contracts with key aspects under IFRS 15 and the specific characteristics of interest to the Group, such as: identifying contractual obligations; contracts with multiple deliverables and recognition timing; contracts with variable compensation; significant financing component; analysis of principal versus agent; existence of service guarantees; and recognition of costs of obtaining and fulfilling a contract.

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The Enel Chile Group participates in the electrical energy Generation, Transmission and Distribution businesses. Based on the nature of the goods and services offered and the characteristics of its revenue streams, the Group did not identify any impacts on the consolidated financial statements of Group at the time of the initial application of IFRS 15, that is, on January 1, 2018.

The Group implemented changes in systems, controls, policies and procedures to comply with the new requirements required by IFRS 15, both accounting record and disclosure.

This Interpretation clarifies the date of the transaction for the purpose of determining the exchange rate to use in foreign currency transactions when the consideration is paid or received before recognizing related revenues, expenses or assets. For this purposes, the date of the transaction is the date on which an entity initially recognizes the non-monetary asset or non-monetary liability arising from the payment or receipt of advance consideration.

The Group has applied IFRIC 22 effective January 1, 2018 and it has not generated an impacts on the Group’s consolidated financial statements.

b) Accounting pronouncements effective from January 1, 2019 and subsequent periods:

As of the date of issue of these interim consolidated financial statements, the following accounting pronouncements had been issued by the IASB, but their application was not yet mandatory:

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In January 2016, the IASB published IFRS 16, which establishes recognition, measurement, presentation and disclosure principles for lease agreements. IFRS 16 supersedes IAS 17, Leases, IFRIC 4, Determining whether an Arrangement contains a Lease, SIC-15, Operating Leases—Incentives, and SIC-27, Evaluating the Substance of Transactions Involving the Legal Form of a Lease.

The standard is effective for annual periods beginning on or after January 1, 2019. Early application is permitted for entities that apply IFRS 15 at or before the date of initial application of IFRS 16. The Group does not plan to adopt the Standard early.

Although IFRS 16 substantially retains the definition of a lease in IAS 17, the main change is the incorporation of the “control” concept within the new definition. In relation to the accounting treatment for a lessee and a lessor, the new Standard states the following:

IFRS 16 provides a series of practical expedients for the transition, both for the definition of a lease and for retrospective application of the standard. The Group has not yet decided if it will use certain or all of the practical expedients.

The Group is currently carrying out an assessment of the potential impact of IFRS 16 on its consolidated financial statements. The quantitative effect will depend on, among others, the chosen transition method, the extent to which the Group uses the practical expedients and recognition exemptions, and any additional lease contract entered into by the Group in the future. Enel Chile expects to reveal its transition method and quantitative information before the date of adoption.

In June 2017, the IASB issued IFRIC 23 to clarify the application of recognition and Measurement requirements in IAS 12, Income Taxes when there is uncertainty over income tax treatments. The Interpretation specifically addresses the following: whether an entity considers uncertain tax treatments separately; the assumptions an entity makes about the examination of tax treatments by taxation authorities; how an entity determines taxable profit (loss), tax bases, unused tax losses, unused tax credits and tax rates; and how an entity considers changes in facts and circumstances.

The Interpretation is effective for annual periods beginning on or after January 1, 2019. Early application is permitted.

The Group’s management is currently assessing the potential impact that IFRIC 23 will have on its consolidated financial statements on its initial application.

The IASB issued the Conceptual Framework (revised) in March 2018. It incorporates some new concepts, provides updated definitions and recognition criteria for assets and liabilities and clarifies some important concepts.

Changes to the Conceptual Framework may affect the application of IFRS when no standard applies to a particular transaction or event. The revised Conceptual Framework is effective for periods beginning on or after January 1, 2020.

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In Management’s opinion, the application of the foregoing amendments and annual improvements is not expected to have a significant effect on the consolidated financial statements of Enel Chile and its subsidiaries.

2.3 Responsibility for the information, judgments and estimates provided

Management is responsible for the information contained in these consolidated financial statements and expressly states that all IFRS principles and standards, as issued by the IASB, have been fully implemented.

In preparing the consolidated financial statements, certain judgments and estimates made by management have been used to quantify some of the assets, liabilities, income, expenses and commitments recorded in the statements.

The most important areas were critical judgment is required are:

The estimates refer basically to:

Although these judgments and estimates have been based on the best information available on the issuance date of these consolidated financial statements, future events may occur that would require a change (increase or decrease) to these estimates in subsequent periods. This change would be made prospectively, recognizing the effects in the corresponding future consolidated financial statements.

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2.4 Subsidiaries

Subsidiaries are defined as those entities controlled either, directly or indirectly, by the Company. Control is exercised if, and only if, the following conditions are met: The Company has i) power over the subsidiary, ii) exposure or rights to variable returns from these entities and iii) the ability to use its power to influence the amount of these returns.

The Company has power over its subsidiaries when it holds the majority of the substantive voting rights or, should that not be the case, when it has rights granting the practical ability to direct the entities’ relevant activities, that is, the activities that significantly affect the subsidiary’s results.

The Company will reassess whether or not it controls a subsidiary if the facts and circumstances indicate that there are changes to one or more of the three elements of control listed above.

Subsidiaries are consolidated as described in note 2.7.

Appendix 1. “Enel Chile Group Subsidiaries” to these consolidated financial statements describes the relationship of the Company with each of its subsidiaries.

2.4.1 Unconsolidated companies with an ownership interest of more than 50%

Although the Group holds more than a 50% ownership interest in Centrales Hidroeléctricas de Aysén S.A. (hereinafter “Hidroaysén”), it is considered a “joint venture” because due to the contracts or agreements established between the shareholders, the Group exercises joint control of the investee.

As of March 31, 2018, the investment that the Group has in Hidroaysén has been classified as non-current assets held for sale (see notes 3.j, 5 and 12).

2.5 Investment in associates

Associates are those entities in which the Group, either directly or indirectly, exercises significant influence.

Significant influence is the power to participate in the financial and operational policy decisions of the associate but is not control or joint control over those policies. In assessing significant influence, the Group takes into account the existence and effect of potential exercisable voting rights or convertible at the end of each reporting period, including potential voting rights held by the Company or by another Group entity. In general, significant influence is presumed to be those cases in which the Group has an ownership interest of more than 20%.

Associates are incorporated to the consolidated financial statements using the equity method, as described in Note 3.i.

Appendix 3. “Associates and Joint Ventures” to these consolidated financial statements describes the relationship of the Company and each of these companies.

2.6 Investment in joint arrangements

Joint arrangements are defined as those entities in which the Group exercises control under an agreement with other shareholders and jointly with them, in other words, when decisions on the entities’ relevant activities require the unanimous consent of the parties sharing control.

Depending on the rights and obligations of the parties, joint arrangements are classified as:

In determining the type of joint arrangement in which it is involved, the management of the Group assesses its rights and obligations arising from the arrangement by considering the structure and legal form of the arrangement, the terms agreed by the parties in the contractual arrangement and, when relevant, other facts and circumstances. If facts and circumstances change, the Group reassesses whether the type of joint arrangement in which it is involved has changed.

Currently, the Company is not involved in any joint arrangement that qualifies as a joint operation.

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Appendix 3. “Associates and Joint Ventures” to these consolidated financial statements describes the relationship of the Company and each of these companies.

2.7 Basis of consolidation and business combinations

The subsidiaries are consolidated and all their assets, liabilities, income, expenses, and cash flows are included in the consolidated financial statements once the adjustments and eliminations from intragroup transactions have been made.

The comprehensive income of subsidiaries is included in the consolidated statement of comprehensive income from the date when the parent company obtains control of the subsidiary and until the date on which it loses control of the subsidiary.

The operations of the parent company and its subsidiaries have been consolidated under the following basic principles:

For each business combination, the Group chooses whether to measure the non-controlling interests in the acquiree at fair value or at the proportional share of the net identifiable assets acquired.

If the fair value of all assets acquired and liabilities assumed at the acquisition date has not been completed, the Group reports the provisional values accounted for in the business combination. During the measurement period, which shall not exceed one year from the acquisition date, the provisional values recognized will be adjusted retrospectively as if the accounting for the business combination had been completed at the acquisition date, and also additional assets or liabilities will be recognized to reflect new information obtained on events and circumstances that existed on the acquisition date, but which were unknown to the management at that time. Comparative information for prior periods presented in the financial statements is revised as needed, including making any change in depreciation, amortization or other income effects recognized in completing the initial accounting.

For business combinations achieved in stages, the fair value of the equity interest previously held in the acquired company’s equity is measured on the date of acquisition and any gain or loss is recognized in the results for that period.

Any difference between the assets and liabilities contributed to the consolidation and the compensation given is recorded directly in Net equity as a debit or credit to Other reserves. The Group does not apply retrospective accounting recognition of business combinations under common control.

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The main accounting policies used in preparing the accompanying consolidated financial statements are the following:

Property, plant and equipment are measured at acquisition cost, net of accumulated depreciation and any impairment losses they may have experienced. In addition to the price paid to acquire each item, the cost also includes, where applicable, the following concepts:

Items for construction work in progress are transferred to operating assets once the testing period has been completed and they are available for use, at which time depreciation begins.

Expansion, modernization or improvement costs that represent an increase in productivity, capacity or efficiency, or a longer useful life are capitalized as increasing the cost of the corresponding assets.

The replacement or overhaul of entire components that increase the asset’s useful life or economic capacity are recorded as an increase in cost for the respective assets, derecognizing the replaced or overhauled components.

Expenditures for periodic maintenance, conservation and repair are recognized directly as an expense for the year in which they are incurred.

Property, plant and equipment, net of its residual value, is depreciated by distributing the cost of the different items that comprise it on a straight-line basis over its estimated useful life, which is the period during which the Group expects to use the assets. Useful life estimates and residual values are reviewed on an annual basis and if appropriate adjusted prospectively.

The following table sets forth the main categories of property, plant and equipment with their respective estimated useful lives:

Additionally, the following table sets forth more details on the useful lives of plant and equipment items:

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Land is not depreciated since it has an indefinite useful life.

Gains or losses that arise from the sale or disposal of items of Property, plant and equipment are recognized as “Other gains (losses)” in the comprehensive income statement and are calculated by deducting the net carrying amount of the asset and any sales expenses from the amount received in the sale.

Investment property includes land and buildings held for earning rentals and/or for capital appreciation.

Investment property is measured at acquisition cost less any accumulated depreciation and impairment losses that have been incurred. Investment property, excluding land, is depreciated on a straight-line basis over the useful lives of the related assets.

An investment property is derecognized upon disposal or when no future economic benefits are expected from its use or disposal.

Gains or losses on recognition of the investment property is calculated as the difference between the net disposal proceeds and the carrying amount of the asset.

The breakdown of the fair value of investment property is detailed in Note 16.

Goodwill arising from business combinations, and reflected upon consolidation, represents the excess value of the consideration paid plus the amount of any non-controlling interests over the Group’s share of the net value of the assets acquired and liabilities assumed, measured at fair value at the acquisition date. If the accounting for a business combination is completed within the following year after the acquisition date, and so is the goodwill determination, the entity recognizes the corresponding adjustments to the provisional amounts as if the accounting for the business combination had been completed at the acquisition date. During the measurement period of the business combination, the goodwill can be adjusted as a result of changes in the recognized provisional amounts of the assets acquired and liabilities assumed (see note 2.7.1).

Goodwill arising from acquisition of companies with functional currencies other than the Chilean peso is measured in the functional currency of the acquired company and translated to Chilean pesos using the exchange rate effective as of the date of the statement of financial position.

Goodwill is not amortized; instead, at the end of each reporting period or when there are indicators that an impairment might have occurred, the Group estimates whether any impairment loss has reduced its recoverable amount to an amount less than the carrying amount and, if so, an impairment loss is immediately recognized in profit or loss (see Note 3.e).

Intangible assets are initially recognized at their acquisition cost or production cost, and are subsequently measured at their cost, net of their accumulated amortization and impairment losses they may have experienced.

Intangible assets are amortized on a straight-line basis during their useful lives, starting from the date when they are ready for use, except for those with an indefinite useful life, which are not amortized. As of March 31, 2018 and December 31, 2017, there are no significant intangible assets with an indefinite useful life.

An intangible asset is derecognized on disposal, or when no future economic benefits are expected from use or disposal.

Gains or losses arising from derecognition of an intangible asset, measured as the difference between the net disposal proceeds and the carrying amount of the asset are recognized in profit or loss when the asset is derecognized.

The criteria for recognizing these assets’ impairment losses and, if applicable, recovery of impairment losses recorded in previous periods are explained in Note 3.e below.

d.1) Research and development expenses

The Group recognizes the costs incurred in a project’s development phase as intangible assets in the statement of financial position as long as the project’s technical feasibility and future economic benefits have been demonstrated.

Research costs are recorded as an expense in the consolidated statement of comprehensive income in the period in which they are incurred.

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d.2) Other intangible assets

Other intangible assets correspond to computer software, water rights, and easements. They are initially recognized at acquisition or production cost and are subsequently measured at cost less accumulated amortization and impairment losses, if any.

Computer software is amortized (on average) over four years. Certain easements and water rights have indefinite useful lives and, therefore, are not amortized.

During the year, and principally at the end of each reporting period, the Group evaluates whether there is any indication that an asset has been impaired. If any such indication exist the Group estimates the recoverable amount of that asset to determine the amount of the impairment loss. In the case of identifiable assets that do not generate cash flows independently, the Group estimates the recoverable amount of the Cash Generating Unit (CGU) to which the asset belongs, which is understood to be the smallest identifiable group of assets that generates independent cash inflows.

Notwithstanding the preceding paragraph, in the case of CGU’s to which goodwill or intangible assets with indefinite useful lives have been allocated, a recoverability analysis is performed routinely at each period end.

Recoverable amount is the higher of fair value less costs of disposal and value in use, which is defined as the present value of the estimated future cash flows. In order to calculate the recoverable amount of Property, plant, and equipment, as well as of goodwill, and intangible assets, the Group uses value in use criteria in practically all cases.

To estimate value in use, the Group prepares future pre-tax cash flow projections based on the most recent budgets available. These budgets incorporate management’s best estimates of a CGU’s revenue and costs using sector projections, past experience and future expectations.

In general, these projections cover the next five years, estimating cash flows for subsequent years by applying reasonable growth rates which, in no case, are increasing rates nor exceed the average long-term growth rates for the particular sector and country in which the Group operates. As of December 31, 2017, the growth rate used to extrapolate the projections was 3.1%.

Future cash flows are discounted to calculate their present value at a pre-tax rate that covers the cost of capital for the business activity and the geographic area in which it is being carried out. The time value of money and risk premiums generally used among analysts for the business activity and the geographic zone are taken into account to calculate the pre-tax rate.

The minimum and maximum pre-tax discount rates applied in the period ended December 31, 2017 expressed in nominal terms were 7.5% and 10.7%, respectively.

If the recoverable amount of the CGU is estimated to be less than the net carrying amount of the asset, the corresponding impairment loss is recognized for the difference, and charged to “Reversal of impairment loss (impairment loss)” recognized in profit or loss in the consolidated statement of comprehensive income. The impairment is first allocated to reduce the carrying amount of any goodwill allocated to the CGU, and then to the other assets of the unit pro rata on the basis of the carrying amount of each asset in the unit. The carrying amount of an asset is not reduced below the highest of fair value less costs of disposal, its value in use; or zero.

Impairment losses recognized for an asset in prior periods are reversed when there are indications that the impairment loss no longer exists or may have decreased, thus increasing the asset’s carrying amount with a credit to earnings. The increase in the asset’s carrying amount shall not exceed that carrying amount that would have been determined had no impairment loss been recognized for the asset. Goodwill impairment losses are not reversed in subsequent periods.

In order to determine whether an arrangement is, or contains, a lease, the Group assesses the economic substance of the agreement, in order to determine whether fulfillment of the arrangement depends on the use of a specific asset and whether the agreement conveys the right to use an asset. If both conditions are met, at the inception of the arrangement the Group separates the payments and other considerations relating to the lease, at their fair values, from those corresponding to other components of the agreement.

Leases that substantially transfer all the risks and rewards of ownership to the Group are classified as finance leases. All others leases are classified as operating leases.

Finance leases in which the Group acts as a lessee are recognized at the inception of the arrangement. At that time, the Group records an asset based on the nature of the lease and a liability for the same amount, equal to the fair value of the leased asset or the present value of the minimum lease payments, if the latter is lower. Subsequently, the minimum lease payments are apportioned between finance expenses and reduction of the lease obligation. Finance expenses are recognized immediately in the income statement and allocated over the lease term, so as to achieve a constant interest rate on the remaining balance of the liability. Leased assets are depreciated on the same terms as other similar depreciable assets, as long as there is reasonable certainty that the lessee will acquire ownership of the asset at the end of the lease. If no such certainty exists, the leased assets are depreciated over the shorter of the useful lives of the assets and their lease term.

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In the case of operating leases, payments are recognized as an expense in the case of the lessee and as income in the case of the lessor, both on a straight-line basis, over the term of the lease unless another type of systematic basis of distribution is deemed more representative.

Financial instruments are contracts that give rise to both a financial asset in one entity and a financial liability or equity instrument in another entity.

g.1) Financial assets other than derivatives

The Group classifies its financial assets other than derivatives, whether permanent or temporary, except for investments accounted for using equity method (see Notes 3.i and 12) and those held for sale, into three categories: