Overview
- The 2026 fiscal package raises the provisional ISR withholding on bank interest to 0.9% from 0.5%, subject to congressional approval.
- SHCP says the change redistributes payments through the year and keeps exemptions for balances under 206,000 pesos and for people earning under 400,000 pesos annually.
- In an SHCP example, a saver with 500,000 pesos would have 4,500 pesos withheld during the year and owe about 237 pesos at filing, with total ISR unchanged at 4,737 pesos.
- IMEF leaders warn up to 48 million potential savers—especially informal workers and non‑filers—could be unable to credit the withholding, encouraging a shift to cash or alternative institutions.
- Tax experts note the retention is calculated on capital each month, which could reduce liquidity for depositors, and the current 0.5% rate remains until the Chamber of Deputies and the Senate vote.