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AAC Tax Code.

The National Internal Revenue Code of 1997 as it currently stands — consolidated by the firm to carry the TRAIN Law, the CREATE Act, the Ease of Paying Taxes Act, the VAT on Digital Services Act, CREATE MORE, the CMEPA and the amendatory laws in force to 1 August 2026, with a footnote at every provision naming the law that changed it.

Text current as at 1 August 2026. This is an unofficial consolidation prepared by the firm and not the official text of the Code. Repealed provisions are kept, struck through, so that references in earlier records stay traceable.
Download the PDF edition →

The printed edition runs to 240 pages and carries the same text, footnotes and references as the browser below. Every section here shows the page it sits on in that PDF, so a citation taken from the screen matches the one taken from the book.

TITLE II — TAX ON INCOME › CHAPTER VIII. ACCOUNTING PERIODS AND METHODS OF ACCOUNTING

SEC. 43. General Rule

Page 49 of the PDF edition

The taxable income shall be computed upon the basis of the taxpayer’s annual accounting period (fiscal year or calendar year, as the case may be) in accordance with the method of accounting regularly employed in keeping the books of such taxpayer; but if no such method of accounting has been so employed, or if the method employed does not clearly reflect the income, the computation shall be made in accordance with such method as in the opinion of the Commissioner clearly reflects the income. If the taxpayer’s annual accounting period is other than a fiscal year, as defined in Section 22(Q), or if the taxpayer has no annual

accounting period, or does not keep books, or if the taxpayer is an individual, the taxable income shall be computed on the basis of the calendar year.

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