Mexican tax and wealth legislation in force as PDFs straight from the source, the official indicators that govern contracts and taxes, Banxico's transfer validator and the authority directories. Every resource with its "what it's for" — because a link without context protects no one.
Each link opens the PDF published by the Cámara de Diputados (Chamber of Deputies) or the SAT — the source, not a copy. We deliberately don't host the files: laws get amended, and a stored PDF ages in silence; the direct link to the source guarantees you the text in force the day you open it.
The supreme law: taxpayer rights (arts. 14, 16, 31-IV), family patrimony (27-XVII) and the foundations of the entire system.
Official PDF ↗The tax 'law of laws': obligations, SAT powers, deadlines, penalties, remedies, 69-B, 17-H, PAE.
Official PDF ↗The central tax (income tax): regimes, deductions, art. 93 exemptions, dividends, related parties.
Official PDF ↗Rates, exemptions, the 0% rate, crediting and the rules behind every VAT refund.
Official PDF ↗The excise tax: fuels, beverages, tobacco and their pass-through and crediting rules.
Official PDF ↗Contracts, working hours, vacation, aguinaldo (the mandatory Christmas bonus), final pay, dismissals and severance.
Official PDF ↗Employer-employee contributions, SBC (contribution base salary), work-risk premiums, pensions and your obligations to the IMSS.
Official PDF ↗The rules of the annulment trial before the TFJA: deadlines, evidence, suspension and rulings.
Official PDF ↗Your rights against the authority in audits and procedures — short, and far too little read.
Official PDF ↗Incorporation, shareholder meetings, management and transformations of your companies.
Official PDF ↗Contracts, obligations, gifts, successions — the common law behind every structure.
Official PDF ↗The operational detail of the law: deduction requirements, employee welfare benefits and procedures.
Official PDF ↗Vulnerable activities, identification and reporting thresholds, and the limits on cash use for real estate, vehicles and metals.
Official PDF ↗The SAT's general rules for the year (miscellaneous tax resolution): procedure sheets, facilities and processes (DOF 28-Dec-2025).
Official PDF ↗The 2026 income tax tables in force: monthly, annual and withholding brackets.
RFC (taxpayer ID), e.firma (digital signature), digital seals, free invoicing and returns — each direct link with the Strategium guide that walks you through it. If a SAT link changes, the portal's search with the exact procedure name will find it.
Issue a CFDI 4.0 (tax invoice) without paying for a service: the official free tool (individuals can seal it with their e.firma, no CSD needed).
Look up all your certificates (e.firma and seals) with your RFC: status, validity and the .cer download. Audit here which seals exist in your name.
Download the official application to generate the request for your Digital Seal Certificate (CSD) and the files for your e.firma.
Submit your CSD request, renew your e.firma online and revoke compromised seals — the second act of the Certifica procedure.
Schedule your appointment for RFC registration, first-time e.firma or in-person renewal. Slots are released in blocks — keep trying early.
File your monthly returns — provisional, definitive and zero returns — with your RFC and password or e.firma. The 17th, plus extra days based on the sixth digit of your RFC.
Register as an individual without going to the office — the starting point; the e.firma and registering an economic activity are completed with an appointment.
Before your return — or an invitation letter — the SAT has already gathered your receipts. These three viewers show you the same thing the authority sees: what your employer stamped, what you stamped for your workers, and all your invoices issued and received. Reviewing them is the cheapest way to find a discrepancy before they do.
Look up, with your RFC and password, the payroll receipts your employer stamped in your name: wages, income tax withheld, employment subsidy and the base of your annual return. Here you catch a missing period or figures that don't add up.
Review, in aggregate and per worker, the payroll receipts you stamped for your employees and reconcile the income tax withheld against what you remitted in your returns (data from 2018). The first place to look before the annual return.
With your RFC and password or e.firma, look up and download all your CFDIs issued and received, in ranges of up to 12 months. The source for reconciling your income and deductions against what you declare — and the same data the SAT cross-checks.
The law says one thing; the courts decide what it means. The case law and rulings of the Supreme Court and the TFJA are the second half of any serious analysis — and they're public.
The official library of federal laws and regulations. Here you verify the text in force and the amendment history of any statute — the definitive reference if you suspect something changed.
SCJN ↗The official search engine for case law and rulings from the Supreme Court and federal courts: how the courts have interpreted every article that applies to you.
TFJA ↗The court where annulment trials against the SAT are litigated: precedents, regional chambers and bulletin.
SAT ↗The miscellaneous tax resolution in force, its amendments and annexes, published by the authority itself.
Deducting an invoice from a published EFOS or paying against a cancelled CFDI are mistakes that cost you the deduction, the VAT and sometimes much more. These four public lookups take minutes — the full routine is in our guides on blacklists and the CFDI verifier.
Presumed, definitive, cleared and with a favorable ruling: the issuers of nonexistent transactions published by the SAT. A mandatory check before paying a new supplier.
SAT ↗The other blacklist: taxpayers with final, enforceable or cancelled tax debts, unlocated, or with a conviction for a tax crime.
SAT ↗Verify that an RFC exists, is active and matches the name and postal code — the detail that makes your CFDI 4.0 stamp (or bounce).
SAT ↗With the tax folio, the RFCs and the amount, confirm whether an invoice exists, is in force or was cancelled — no login required.
Penalties in UMAs, exemptions in UDIS, contracts in dollars at the DOF rate, interest referenced to TIIE: Mexico's legal numbers live in these portals. The full explanation of each indicator and where it hits you is in our indicators guide and in the one on the official exchange rate.
The daily publication with legal effect: the exchange rate for settling obligations, UDIS and TIIE. What the DOF (Official Gazette) says is what counts in court and before the SAT.
Banxico ↗Official historical series: the FIX exchange rate, TIIE, CETES, the target rate, UDIS and the quotes for gold and silver coins (the centenario, the Libertad ounce).
INEGI ↗The Unit of Measurement and Update (UMA) in force and its history — the unit for penalties, contribution caps and legal thresholds.
CONASAMI ↗The general and northern-border minimum wages, set by the national commission.
The CEP (Electronic Payment Receipt) is generated by the Bank of Mexico's SPEI system for every interbank transfer that actually settles — with Banxico's digital seal. It works both ways: to verify that the payment someone claims to have sent you exists (the antidote to forged receipts) and to prove, with an official certificate, the payments you made. Full guides: validate what was sent to you · prove what you paid.
The Electronic Payment Receipt certifies that a SPEI transfer actually settled. With the date, tracking key, banks, account and amount you obtain the certificate with Banxico's seal — the definitive tool against fake receipts and the best evidence of your own payments.
SWIFT gpi ↗J.P. Morgan's public SWIFT gpi payment tracker: paste the operation's UETR and see which bank in the chain the money is at — the closest thing to an international CEP that exists.
The Anti-Money-Laundering Law bans cash above certain amounts (real estate, vehicles, metals) and requires you to identify clients and report to the authority when you cross thresholds set in UMA. The guides: cash limits and identification and reporting thresholds.
The table in force by vulnerable activity: from what amount in UMA you must identify your client and from which you must file a report with the UIF (Financial Intelligence Unit).
SAT · PLD ↗The exact amounts above which settling in cash is prohibited for real estate, vehicles, jewelry, watches, works of art and the other acts under art. 32 LFPIORPI.
Numbers first, decisions later. They all use official 2026 figures and none store your data.
RESICO (simplified regime) vs. business/professional activity vs. asimilados (salary-assimilated): same income, three income-tax bills — with 2026 brackets.
CalculatorThe 700,000-UDIS exemption, art. 121 deductions and the 5% state cedular tax where it applies.
CalculatorHow much lands in your account when you invoice professional fees or rental income to a legal entity, to the cent.
CalculatorFull or prorated, with the income-tax-exempt portions.
CalculatorThe real cost of getting current at 2.07% monthly — and the 2026 window that wipes out penalties and surcharges.
Test10 questions, an instant traffic light and the route to close each flag.
CalculatorProrated amounts, seniority premium and severance under the LFT.
CalculatorFrom net to gross with income tax, IMSS, RCV, Infonavit and the payroll tax (ISN) of all 32 states.
General-purpose templates, deliberately conservative, with the scope notes and the certain-date (fecha cierta) instructions included. Direct download, no sign-up. The hardened version for your case is a session.
The loan that does hold up against the SAT: market interest, a schedule, CLABE and the certain-date instruction. It goes hand in hand with the promissory note.
DOCX ⬇The enforceable instrument that accompanies the loan — with ordinary and default interest, and the golden rules so it doesn't lapse in a drawer.
DOCX ⬇Mandatory deliverables, proven capacity, 69-B as grounds for rescission and a 6-year file. The contract an audit wants to see.
DOCX ⬇The written communication under art. 94 LISR that almost no payer requests: applicable fraction, accepted effects and acknowledgment.
DOCX ⬇Onboarding, contract, the expense cycle and quarterly upkeep — the 48-hour proof for each relevant supplier.
DOCX ⬇Seller, buyer and closing: exemption substantiated, source of funds, appraisal and the permanent file for the transaction.
ICS ⬇Five full years of deadlines: the monthly 17th, bimonthly RCV/Infonavit, DIOT, annual returns for companies and individuals, PTU (profit-sharing), work-risk premium, the Christmas bonus and the 2026 incentive. Add it once to Google/Apple Calendar and it reminds you two days before every due date through 2030.
From the SAT office for your e.firma to the TFJA chamber where a tax debt is fought. What each body does and when to turn to each is in our guide to tax defense remedies.
The official directory of tax service modules and the appointment system — e.firma, RFC and in-person clarification procedures.
TFJA ↗Locations of the regional chambers (including the Northeast region based in Monterrey) where annulment trials are filed and litigated.
PRODECON ↗The tax ombudsman: free advice, complaints against arbitrary acts and the conclusive agreements that resolve audits without a trial.
CJF ↗Directory of district courts and collegiate circuit courts — the venue for amparo proceedings in tax and administrative matters.
If a topic on this page is costing you money or sleep — a law that applies to you, an indicator that moves your contract, a disputed transfer, an act of authority — the diagnostic is a conversation.
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