On 17 August 2026, the Chilean Internal Revenue Service (SII) published Circular No. 34, releasing the official calculation tables for monetary adjustments (reajustes) and penalties (multas) applicable to tax obligations due in September 2026. These tables are derived from the monthly variation of the Consumer Price Index (CPI) and the statutory interest rates established in the Tax Code. They are mandatory for determining the updated value of unpaid taxes, late-payment interest, and fines for non-compliance with filing or payment deadlines falling within September. The circular is issued by the Audit Subdirectorate (Subdirección de Fiscalización) and serves as the definitive reference for taxpayers, accountants, and tax software providers when computing liabilities for the month.
Key Takeaways
- Mandatory Application: All taxpayers calculating overdue tax debts, provisional monthly payments (PPMO), or penalties for September 2026 must use the rates and formulas specified in this circular; alternative calculations are not permitted.
- Monthly Update Cycle: The SII issues these tables monthly; professionals should implement automated checks to ensure systems always reference the latest circular, avoiding under- or over-payment of adjustments.
- Impact on Cash Flow Planning: Companies with significant tax liabilities should incorporate the September adjustment factors into treasury forecasts to accurately project cash outflows for tax regularization.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement