SAT Tax Refunds Speed Up During Annual Filing Season: 4.5 Million Individual Taxpayers Receive Refund Balances

The SAT reported average refunds in 3.9 days as it tightens CLABE reviews and processes a record volume of returns.

Tax refunds for individual taxpayers picked up pace at the start of the Annual Return filing season. As of April 30, Mexico’s Tax Administration Service (SAT) had issued refund balances to more than 4.5 million taxpayers for a total exceeding 31.87 billion pesos, according to Gari Flores, the SAT’s Collections Administrator, speaking to members of the Mexican Institute of Public Accountants (IMCP).

The figure comes amid a heavy operational workload for the tax authority. Overall, the SAT received 10.8 million individual returns, of which 7.9 million showed a refund balance. Because some of those filings are still being validated or require corrections, the total number of refunds could continue to rise as reviews move forward and manual requests are processed.

According to the official, the average refund time in 2026 was 3.9 days—below both the agency’s internal five-day target and the legal deadline of up to 40 days established under Mexico’s Federal Tax Code. In practical terms, faster refunds improve household cash flow, especially in an environment where consumer spending has remained resilient but faces pressure from borrowing costs and persistently elevated inflation in some services.

Even so, accountants and taxpayers have reported in recent weeks that certain cases feel slower than last year. The most common explanation has not been a lack of technical capacity, but rather tighter validations—particularly of bank information for depositing the refund balance.

CLABE and validations: the new “bottleneck” for refunds

One of the main sources of friction this year has been the review of interbank account numbers (CLABE). In practice, when the system detects inconsistencies—ranging from data-entry errors to mismatches in account ownership or associated details—the taxpayer may be required to correct the CLABE using the e.firma (electronic signature) or, in some cases, to submit a manual request, which also requires authentication with an electronic signature. For many wage earners or taxpayers with less digital familiarity, this extra step increases processing times and raises the likelihood of delays.

This tightening reflects a dual goal: reducing fraud risk and preventing deposits into invalid accounts or accounts not properly linked to the taxpayer. However, it also raises compliance costs for those with outdated bank details, those who recently changed accounts, or those dealing with issues at their financial institution. From a tax administration standpoint, the challenge is to balance stricter controls with a user experience simple enough to sustain voluntary compliance.

Businesses: more filings and a larger volume of refund balances

On the corporate side, the tax authority reported that between January and March it received 840,359 annual returns from companies, a 7% increase from the prior year. During that period, 202,918 companies reported a refund balance totaling approximately 270.13 billion pesos. These figures reflect both the size of the corporate taxpayer base and the importance of refunds and tax credits to business liquidity, especially for sectors with extensive supply chains or large provisional tax payments.

Refund performance is also being watched from a macroeconomic perspective. In a year when private investment is looking for clear signals of regulatory certainty and operational stability, the speed and predictability of tax procedures—including the refunding of overpayments—can influence working-capital decisions, financial planning, and compliance.

Overall, the SAT’s figures point to agile average refund processing, but with frictions concentrated in CLABE validations and procedures that require an e.firma. In the coming months, performance will depend on maintaining technological capacity, reducing operational incidents, and sustaining controls that prevent irregularities without shifting disproportionate burdens onto taxpayers.