The Chilean Internal Revenue Service (Sii) Circular No. 33, dated August 10, 2026, establishes the official valuation of the Unidad de Fomento (UF) for a defined thirty-day period extending from August 10 to September 9, 2026, inclusive. The UF functions as Chile’s primary inflation-indexed monetary reference, employed extensively in the computation of tax liabilities, interest rates, and credit operations across the national fiscal framework. By prescribing a fixed UF value for this interval, the Sii seeks to uphold fiscal predictability and ensure that monetary adjustments align with the latest inflation metrics as mandated by the Chilean Tax Code and its secondary regulations. This directive necessitates that all money credit agreements, loan arrangements, and tax declarations referencing the UF during the specified window adopt the published index, thereby standardizing the basis for calculating interest accruals, principal repayments, and applicable tax withholdings. Departure from the prescribed UF valuation within this period may lead to computational discrepancies in taxable income, potential penalties for incorrect withholding, and adjustments arising during subsequent fiscal reviews or audits. The circular reinforces the Sii’s broader commitment to a transparent and dynamic monetary correction regime, which mirrors inflationary trends and safeguards the fiscal stability of both corporate entities and individual taxpayers operating under Chilean jurisdiction. Compliance requires taxpayers to verify the UF value published by the Sii at the commencement of any transaction falling within the August 10 – September 9, 2026 window, retaining documentation of the index reference for evidentiary purposes in the event of a tax inquiry.
Key Takeaways
- UF Value Specification for Thirty-Day Window: The Sii fixes the Unidad de Fomento index exclusively for the period August 10 – September 9, 2026, mandating its use in all qualifying credit operations and tax calculations to maintain computational consistency and regulatory compliance.
- Impact on Interest and Tax Computations: Taxpayers must recalibrate interest accruals, principal adjustments, and tax withholdings using the official UF value; failure to do so may result in underpayment penalties, overpayment recoveries, or liability reassessments during fiscal examinations.
- Documentation and Legal Obligations: Affected entities are required to retain records of the UF index application and corresponding transaction details for a minimum of five years, in accordance with Chilean audit standards and the Sii’s enforcement guidelines for monetary correction compliance.
Disclaimer:This article is compiled and summarized based on publicly available information and is for general information and academic exchange purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. For tax planning, please consult a qualified professional tax advisor or legal counsel.
Source: Read Original Announcement