The Mexican Tax Administration Service (SAT) is set to enforce significant financial penalties for taxpayers who fail to file annual declarations or meet mandatory reporting deadlines, according to expansion.mx.
Under the updated 2026 fiscal regulations, taxpayers who neglect their obligations face fines ranging from 2,050 to 25,360 pesos for each undeclared obligation. These penalties stem from articles 81 and 82 of the Federal Tax Code.
Failure to file an annual declaration does more than just block tax refunds. The outlet reported that missing these deadlines also triggers economic sanctions that can escalate quickly.
Escalating penalties for non-compliance
The Tax Administration Service can issue up to three formal requests for compliance, providing a 15-day window between each notice. However, ignoring these prompts leads to much higher costs.
According to Annex 5 of the 2026 Miscellaneous Resolution, fines for failing to respond to requirements or submitting information late can reach 50,710 pesos.
Other specific penalties include charges between 19,460 and 38,890 pesos for failing to submit mandatory notices. Additionally, taxpayers face fines between 20,790 and 41,590 pesos for failing to file electronic declarations or submitting them past the deadline.
In some cases, the tax system may flag errors, prompting the SAT to request adjustments through a supplementary declaration. This process requires taxpayers to correct data or integrate missing information.
If discrepancies are found during this process, the SAT may also generate a tax liability that the taxpayer must pay. The outlet noted that even after paying these fines, the underlying obligation to file the declaration remains mandatory.
