Blog: Mexican Tax & Wealth Insight (English)

Written for Mexico. Every article analyzes Mexican federal tax law (ISR, IVA, SAT). Amounts are in Mexican pesos (MXN). The complete library is available in both languages — the Spanish originals are here →.

Tax insight you can cite, not just share

Official public holidays 2028 in Mexico: dates, law and how they're paid

Official public holidays 2027 in Mexico: dates, law and how they're paid

How much ISR did your employer withhold? The SAT payroll viewer tells you (and reveals the errors)

Before your annual return, reconcile your payroll with the SAT employer viewer

You stamped payroll but never remitted the ISR: the error the SAT viewer lays bare

How to watermark a PDF with the recipient's name (free, no upload)

How to download all your issued and received invoices (CFDI) from the SAT

Your annual return as an employee comes out owing (or refunding): the payroll viewer explains why

The SAT already knows what you invoiced: reconcile your CFDIs against your return before it does

You're about to send a confidential document: how to keep it from ending up where it shouldn't

Having several companies doesn't lower your taxes: the right structure does (and here's how to build it)

"I'm too small for the SAT to audit me": the myth that has cost mid-size businesses the most

$856,363 a year ISR-free: the royalties exemption almost no one claims (art. 93-XXIX)

Lending your bank account can cost you a tax-fraud accusation — you, not whoever uses it

Doctors: stop handing the SAT 5 points of income tax — the structure that orders income, deductions and cash

Your children's assets aren't fought over in a divorce: you protect them with a trust

Moving abroad doesn't free you from the SAT: the notice that decides whether you keep paying in Mexico

Zero return: how to file it (monthly and annual), when it's valid, and why NOT filing it is the SAT's most expensive cheap mistake

Digital Seal Certificate (CSD): the real step-by-step to generate it and start invoicing (Certifica + CertiSAT, no runaround)

How to look up ALL your SAT certificates (active, expired and revoked) — and why you should check them today

Your RFC for the first time: the complete guide to registering without hassle (online, by appointment, and what to do next)

U.S. citizen living in Mexico: the passport that taxes you — 1040, FBAR, PFIC and the traps that punish your Mexican financial life

Deducting the company car: buying (cap $175K) vs. operating lease (cap $200/day) — the full arithmetic

Contribute your brand to the company and amortize it at 15% a year: how the strategy works, when it's legitimate and why the SAT has it on its blacklist of schemes

Materiality and business purpose: the real evidentiary standard — what evidence saves transactions under audit and what no longer impresses anyone

Selling or transferring company shares: how it's done right, what taxes it triggers, and why the tax basis (CUCA/CUFIN) is where everything is won or lost

Real-estate trusts (fideicomisos): what they are, what they're used for (foreigners, developments, rentals, guarantee) and what they really cost

The trust as a wealth-preservation machine: inherit with rules, without probate, proofed against unprepared heirs

Universal heir or specific bequests: the decision that defines whether your will orders your estate or seeds a fight

Investing from Mexico in the US or via Irish ETFs: the three taxes that change (income tax, withholdings and the estate tax no one warned you about)

The market's flat 10%: the best tax deal in the Mexican system (if you trade through the right channel)

CETES, bank notes and bonds: how your interest is really taxed (the 0.90% withholding is not your tax)

Your credit card tells the SAT how much you spend: the art. 91 tax discrepancy explained (and how to protect yourself)

How to report your crypto without losing your mind: cost basis, evidence and the mistakes that manufacture discrepancies

Crypto and taxes in Mexico: what the law does say, what it doesn't, and how each move is taxed (buy, sell, swap, earn)

Life insurance is not (just) insurance: it is the fastest, most liquid and cleanest succession instrument there is

PPR: the deduction of up to ~$214k almost no one uses in full — benefits, fine print and when NOT to use it

The insurance paid out: is that money taxed? Life, medical, cars and property damage, case by case

Loan after loan that is never repaid: how the SAT reads it, what presumptions it triggers, and what the recipient must watch

"Fecha cierta" (certain date): the requirement that can kill your contracts before the SAT — what it is, when it applies and how to get it

When you buy or sell property, who reports what to whom? The map of filings to the SAT, the UIF and the municipality

IMSS weeks of contribution: what they are, how many you need to retire, and how to get your statement online (free)

Employer-employee social security contributions: who pays what, how they're calculated on the SBC, and why a $20,000 salary costs $24,000

SUA and SIPARE explained: how IMSS, RCV and Infonavit contributions are really calculated and paid

UIF, SAT and the Prosecutor: the triangle that sees your money — what they share and when they act together

Is your business a "vulnerable activity" without knowing it? The anti-money-laundering identification and reporting thresholds

The legal cash limits in Mexico: what you can no longer pay in bills (real estate, cars, jewelry) and what happens if you do

The line between a SAT fine and a tax crime: where it is, who crosses it, and how you get back

How far back can the SAT audit and collect from you? The 5 years everyone cites, the 10 few know, and the clocks that stop

You sent (or are waiting on) an international transfer and it doesn't arrive: MT103, UETR and how to really trace it

How do I find my Social Security Number (NSS)? Get it online in 5 minutes — all you need is your CURP

That invoice you were handed may not exist: verify any CFDI with the SAT in a minute (no passwords)

The SAT blacklists: how to check them in 3 minutes and what happens if your supplier (or you) appears on one

Sell your home and pay zero tax: the ~$6-million federal exemption, layer by layer (and which states add an extra tax)

Renting unfurnished housing: don't charge VAT — the article 20 exemption and the three ways to lose it without noticing

The most efficient tax formula for individuals: RESICO + a VAT-exempt or 0%-rated activity

RESICO isn't one, it's two: the individual one (rates of 1% to 2.5%) and the corporate one (that almost no one gets)

VAT-exempt is not the same as 0% rate: the full catalog of activities and the difference worth millions

Paid as an "asimilado a salarios": what you gain, what you lose, and the three traps no one explains

The SAT just hit you: fine, seizure, restricted seals or 69-B — the complete map of your defenses

UMA, UDIS, minimum wage, TIIE and the FIX: the six official indicators that govern your contracts and taxes

The "official" exchange rate does exist: what it is, where to check it and when the law requires you to use it

You paid by SPEI and they say "nothing arrived": how the CEP turns your transfer into full proof

"I already sent the transfer" — but the money never arrives: Banxico's CEP unmasks fake receipts in two minutes

The distributors' hybrid scheme (an individual holding inventory + a company that sells): the real efficiency and the real risk

Donate and deduct: how the 7% cap works for companies and individuals (and the mistakes that void the benefit)

Family patrimony: the constitutional figure that makes your home unseizable (and why almost no one uses it)

The nine ways to pay yourself from your company: the full menu with each one's cost and risk

The 35% blind deduction: the system's best deal for landlords (if you know when to take it)

Offshore companies: what they're really for (and the travel-LLC case, with its fine print)

The three cardinal tax sins: withholdings, VAT collected and buying invoices — the only mistakes no lawyer can save

Your tax regime is a suit: how not to run in one three sizes too costly

You're going to sell your house: the number to know before you go to market (not at the notary)

In your name or the company's? The art. 93 & 151 guide to deciding where each asset lives

Loans and gifts between family members: which pay income tax, which don't, and the $600,000 rule almost no one follows

Every account is a tax account: deposits, cash, and the presumptions that tax you on money that was already yours

Your tax domicile matters more than you think — but not for the reason you were told

Sell your car without paying ISR (and sometimes without IVA): the article 93 gift, explained with its rules

How to choose a tax advisor: what to demand, what to distrust, and the questions that expose them