Quick answer
In Mexico, tax fraud (defraudación fiscal, Federal Tax Code art. 108) means evading tax by deceit or by exploiting an error. In 2026 it carries 3 months to 9 years in prison depending on the amount, and up to half again when aggravated. Buying or selling fake invoices carries 2 to 9 years. Administrative fines run from 55% to 75% of the tax omitted.
Last reviewed: November 2026 · Reviewed by Stéphane Gombauld, tax expert, technologist and digital nomad
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Check my tax setup →You live or run a business in Mexico and want to stay far from trouble with SAT, the tax authority. This guide explains where Mexico draws the line between a mistake, a fine and a crime in 2026, and how to fix an error before it escalates.
Mexico tax fraud regulations in 2026: the key figures
| Item | Rule in 2026 |
|---|---|
| Legal basis | Federal Tax Code (CFF), articles 108, 109 and 113 Bis |
| Prison for tax fraud | 3 months to 2 years, 2 to 5 years, or 3 to 9 years by amount |
| Aggravated fraud | Penalty increased by up to one half |
| Fake invoices (buying or selling) | 2 to 9 years in prison |
| Administrative fine for omitted tax | 55% to 75% of the tax omitted |
| Late-payment surcharge | About 1.47% a month, plus inflation update |
| Statute of limitations for assessments | 5 years, up to 10 in some cases |
| Voluntary correction before an audit | No fine, only tax, surcharges and inflation update |
Is this guide for you?
Read on if you…
- are a Mexican tax resident with income from several countries;
- run a business in Mexico and issue or receive CFDI e-invoices;
- received a letter from SAT or discovered an error in a past return.
Probably not your case if you…
- have no Mexican income and no home in Mexico;
- need defence counsel for an ongoing criminal case (talk to a criminal tax lawyer now).
What counts as tax fraud in Mexico?
Article 108 of the CFF defines tax fraud as using deceit, or taking advantage of an error, to pay less tax or get an undue benefit. Deceit means a deliberate act: false records, hidden income, made-up expenses.
Article 109 lists acts treated the same way as fraud. The most common:
- declaring false deductions or income lower than you really earned;
- spending more than your declared income without explaining where the money came from;
- keeping VAT or income tax you withheld from others instead of paying it to SAT;
- using undue tax credits or refunds.
Here's the catch for expats. The spending test is called discrepancia fiscal. If your card spending and bank deposits in Mexico exceed your declared income, SAT presumes undeclared income. Foreign savings you bring in must be documented.
Fake invoices: the EFOS and EDOS lists
Mexico's top target is fake invoices. SAT publishes companies that issue invoices for operations that never happened. They're called EFOS. Their clients, EDOS, must prove the operations were real or lose the deduction.
Since 2020, issuing, selling, buying or using fake CFDIs is a crime under article 113 Bis, with 2 to 9 years in prison.
What are the penalties?
Criminal penalties
Prison depends on the amount of tax evaded:
| Amount evaded | Prison in 2026 |
|---|---|
| Up to the first threshold (about MXN 2.2 million) | 3 months to 2 years |
| Up to the second threshold (about MXN 3.3 million) | 2 to 5 years |
| Above the second threshold | 3 to 9 years |
| Amount can't be determined | 3 months to 6 years |
| Aggravated fraud (fake documents, simulated operations, foreign shells) | Penalty increased by up to one half |
The prosecutor needs a complaint from the tax authority to proceed. Paying the tax, fines and surcharges before charges are filed can end the case for smaller amounts.
Administrative penalties
Most cases never become criminal. SAT assesses the tax, surcharges and a fine.
| Situation | Consequence |
|---|---|
| Tax omitted, found in an audit | Fine of 55% to 75% of tax omitted |
| Corrected during an audit, before the final assessment | Reduced fine, about 20% of tax omitted |
| Corrected spontaneously, before any audit | No fine |
| Late payment | Surcharges of about 1.47% a month plus inflation update |
| Missing CFDI or incorrect invoices | Fixed fines per invoice |
| Repeat problems | Restriction or cancellation of your digital seal (CSD) |
Losing your digital seal is serious. Without it, you can't issue invoices. Your business stops.
How does SAT find out?
SAT is one of the most data-rich tax authorities in Latin America. It sees:
- Every CFDI you issue and receive, in real time.
- Bank deposits reported by Mexican banks.
- Foreign accounts through the CRS, the OECD's automatic exchange of financial information, and FATCA with the US.
- Platform income from Airbnb, Uber and marketplaces, which withhold and report.
- Large transactions reported by notaries, car dealers and property agents under anti-money-laundering rules.
Since 2026, digital platforms must give SAT online access to transaction data.
How do you fix an error before it becomes a problem?
- Check your SAT records. Download your CFDIs and compare them with your returns.
- File a complementary return. A declaración complementaria corrects a past return.
- Pay tax, surcharges and inflation update. If you correct before any audit, there's no fine.
- Keep the evidence. Contracts, bank statements, proof of foreign tax and foreign savings.
- Ask for a compliance opinion. The opinión de cumplimiento shows SAT sees you as compliant. Clients and banks often ask for it.
- Use PRODECON if you disagree. The taxpayer ombudsman offers free mediation with SAT.
Good news: honest mistakes stay administrative. Fraud requires deceit. Keep clean records and you're on the safe side. For the full tax system, read the tax landscape overview of Mexico. If you invoice as a freelancer or company, see what's deductible in business expenses in Mexico.
Comparing countries? See tax fraud regulations in Paraguay and tax fraud regulations in Costa Rica.
Example – Jake, Australian consultant in Playa del Carmen
Jake became Mexican resident in 2024 but kept declaring only his Mexican invoices. His Australian bank reported his account through CRS. In 2026 he spots the issue: MXN 600,000 of foreign income missing from his 2024 return. He files a complementary return before any SAT letter and pays the tax of about MXN 180,000, plus surcharges and inflation update. No fine, no criminal risk. Had SAT found it first, the fine alone could have reached MXN 135,000.
Jake fixed one gap before SAT did and saved a six-figure fine. Your records might hide a gap too.
Check your Mexican tax setup with Heavnn before an audit does it for you.
Check my tax setup →Common mistakes (and what they cost)
- Buying deductions from invoice mills. The issuer lands on the EFOS list → deduction denied, fines and up to 9 years in prison.
- Ignoring foreign income. CRS data reaches SAT → back tax, fines of 55% to 75% and surcharges.
- Bringing savings in without proof. SAT sees spending above income → presumed undeclared income taxed at up to 35%.
- Not paying withheld VAT or salary tax. Treated as fraud → criminal exposure for the business owner.
- Waiting for SAT's letter before correcting. You lose the voluntary-correction benefit → a fine you could have avoided.
Frequently asked questions
What is considered tax fraud in Mexico?
Tax fraud under article 108 of the Federal Tax Code is using deceit, or exploiting an error, to pay less tax or obtain an undue benefit. Article 109 adds equivalent acts, such as false deductions, undeclared income, keeping withheld taxes and spending well beyond declared income without explanation.
Can you go to jail for tax evasion in Mexico?
Yes. Tax fraud carries 3 months to 9 years in prison depending on the amount evaded, increased by up to one half when aggravated. Buying or selling fake invoices carries 2 to 9 years. In practice, most cases are settled administratively with tax, fines and surcharges.
What is the fine for unpaid taxes in Mexico?
If SAT finds omitted tax in an audit, the fine is 55% to 75% of the tax omitted, plus monthly surcharges and an inflation update. If you correct during the audit, the fine drops. If you correct spontaneously, before any SAT action, there's no fine at all.
How long can SAT audit past years?
Generally five years from the filing deadline. It extends to ten years if you weren't registered with an RFC, didn't keep accounting records or didn't file required returns. Keep invoices, contracts and bank statements for at least that long.
What are EFOS and EDOS in Mexico?
EFOS are businesses SAT has listed for issuing invoices for operations that didn't exist. EDOS are the clients who deducted those invoices. If a supplier lands on the list, you must prove the operation was real or correct your returns, or you lose the deduction and face fines.
Does SAT know about my foreign bank accounts?
Very likely. Mexico exchanges financial account data with over 100 countries through the OECD's Common Reporting Standard, and with the US through FATCA. If you're a Mexican tax resident, your foreign bank and broker accounts are usually reported to SAT every year.
Related guides
- Mexico tax landscape overview: every tax in one page
- Business expenses you can deduct in Mexico
- How crypto is taxed in Mexico
- How to become a Mexican tax resident
- Specific taxes in Mexico: IEPS, payroll and property taxes
- Tax fraud regulations in Costa Rica
- All country tax guides
Sources
- SAT – Servicio de Administración Tributaria
- Cámara de Diputados – Federal Tax Code (CFF)
- Diario Oficial de la Federación
- PRODECON – Taxpayer ombudsman
- OECD – Automatic Exchange Portal
This guide is general information, not personalised tax advice. See how we research and review.
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