Mexico's 2026 Marketplace VAT Withholding: What B2B Sellers Must Track

If you sell goods through Amazon, Mercado Libre, or any other digital marketplace to customers in Mexico, part of your money never reaches your bank account anymore — and that is by design. Since January 1, 2026, Mexico requires intermediation platforms to withhold value-added tax (VAT) and income tax from business sellers, not just individuals. On top of that, the platforms must give Mexico's tax authority a permanent, always-on window into their transaction databases. If your books still treat a marketplace payout as simply "revenue received," your 2026 filings in Mexico are probably wrong.

Here is what changed, what the tax authority can now see about your business, and how to set up your bookkeeping so every withheld peso is tracked, credited, and reconcilable.

What Changed on January 1, 2026​

Mexico has taxed sales through digital platforms for years, but the withholding regime used to apply only to individual (personal) sellers. The tax reform enacted in November 2025, fleshed out by the 2026 Miscellaneous Tax Resolution published that December, extended the obligation to business-to-business transactions. If your company sells goods, renders services, or grants the temporary use of property through a digital intermediation platform in Mexico, the platform is now your withholding agent.

The rates depend on one thing above all: whether you have given the platform your Mexican tax ID, the RFC (Registro Federal de Contribuyentes).

The Withholding Rates for Business Sellers​

Mexico's standard VAT rate is 16%, so a registered seller effectively has 8% of each sale's VAT siphoned off at the platform level, plus 2.5% income tax. An unregistered seller loses the entire 16% VAT component plus a full fifth of the payment to income tax withholding. That gap is the single most expensive bookkeeping oversight a cross-border seller can make in Mexico this year: registering for an RFC and handing it to every platform you sell through roughly halves your VAT withholding and cuts income tax withholding by nearly ninety percent.

There are also situations where the platform must withhold 100% of the VAT regardless. The main ones: sales of goods located in Mexico by nonresidents without a Mexican establishment, and transactions whose proceeds land in bank accounts located outside Mexico. If you are a foreign seller having marketplace payouts deposited to a US or other non-Mexican account, expect full VAT withholding — and expect the platform to ask you for a formal statement identifying those foreign accounts and the country where each sits.

The Withholding Is Creditable — If You Document It​

The amounts withheld are not an extra tax. The 2.5% income tax withholding can be credited against your provisional (monthly estimated) income tax payments and your annual liability. The withheld VAT reduces the VAT you owe on the sale. But in Mexico, credits live and die by electronic paperwork: for every withholding, the platform must issue you a CFDI de retenciones e información de pagos (an electronic withholding receipt) carrying a "Digital Platform Services" supplement that standardizes the reported data. No receipt, no credit. Collecting, storing, and matching these receipts to payouts is now a core monthly bookkeeping task, not an optional nicety.

SAT's Real-Time Window Into Platform Data​

The withholding expansion got the headlines, but the deeper change is surveillance infrastructure. Under Article 30-B of the Federal Tax Code, implemented through Rule 2.9.21 of the 2026 resolution, digital service providers and intermediation platforms — Mexican and foreign alike — must grant SAT permanent, online access to their transaction data. Not a monthly file upload. A standing system, interface, or application where the authority logs in with credentials the platform provides and queries the data on an ongoing basis, for the stated purpose of verifying tax compliance.

What SAT Can See About You​

For marketplace sellers, service providers, and lessors, the database the platform must expose includes:

• Your full legal name or business name, RFC or foreign tax ID, and tax domicile or nationality
• The bank and account (Mexican CLABE or foreign account number) where your payouts are deposited
• Every transaction amount, broken down for income tax, VAT, and excise tax purposes
• The income tax, VAT, and excise tax withheld on each transaction
• Payment methods used by you, the buyer, and the platform
• The invoice (CFDI) number identifying each transaction
• For lodging, the full property address; for goods, whether the sale is an import and any tariffs applied

Platforms must keep this data queryable — both record by record and in bulk — for five years, supply SAT with manuals and technical documentation, and file a formal access notice (due April 30, 2026 for existing platforms, or within a month of starting operations for new ones), updating it within 10 days of any change. The access obligation took effect April 1, 2026.

Why This Matters More Than the Rates​

Two practical consequences follow. First, the monthly informative return platforms file — now due by the 10th of each month — must detail every seller and every intermediated transaction even when no payment was collected and no VAT changed hands. Canceled orders, pending payouts, and zero-collection periods are all visible. Second, noncompliance can get a platform's internet access in Mexico temporarily suspended — the so-called kill switch. Platforms therefore have every incentive to demand clean, complete seller data and to withhold aggressively when in doubt. If your RFC, legal name, or domicile is inconsistent across marketplaces, or missing entirely, the platform's safest move is the maximum withholding rate, and SAT's cross-checks will eventually surface the mismatch anyway.

A Compliance Checklist for Sellers on Mexican Marketplaces​

1. Get an RFC and give it to every platform​

This is step zero. Without an RFC on file, you pay 100% VAT and 20% income tax withholding on every sale. Foreign sellers without a Mexican establishment face additional registration duties — enrollment in the RFC registry, monthly VAT filings, a local legal representative and address, and an electronic signature — so budget for professional help rather than improvising.

2. Decide where payouts should land​

Proceeds deposited to foreign accounts trigger 100% VAT withholding and extra reporting (the platform must collect and report your foreign-account statement). Running payouts through a Mexican account with a CLABE does not eliminate withholding, but it keeps you in the standard 50%/2.5% lane and simplifies the paper trail. Model both options: the cash-flow timing difference between half-VAT and full-VAT withholding across a month of sales is material.

3. Reconcile every payout, every month​

A marketplace deposit is never just revenue. Each payout bundles gross sales, platform fees, VAT charged, VAT withheld, and income tax withheld. Your monthly close should tie each deposit back to these components and to the platform's withholding CFDIs. A practical reconciliation flow:

• Record gross sales and the full 16% VAT charged at the point of sale, per your own invoices.
• Record platform fees as an expense with their own VAT treatment.
• Record VAT withheld and income tax withheld as separate receivable/recoverable-tax lines, matched to each CFDI de retenciones.
• Clear those recoverable lines when the amounts are credited on your monthly VAT and provisional income tax returns.
• Flag any payout missing its withholding receipt immediately — chase the platform before the filing deadline, because an uncredited withholding is a cash loss until (and unless) documented.

4. Keep your master data identical everywhere​

Because SAT can query seller identity, accounts, and transaction detail across platforms in real time, discrepancies between marketplaces — a slightly different business name, an old domicile, a personal account on one platform and a business account on another — are now audit bait. Standardize your legal name, RFC, domicile, and payout accounts, then verify what each platform actually has on file.

5. Calendar the platform's deadlines, not just your own​

Your filings depend on documents the platform produces. The platform's informative return goes to SAT by the 10th of each month; your withholding receipts should arrive in time for your own monthly VAT payment (due by the 17th of the following month) and provisional income tax calculations. Build a 3-day buffer into your close calendar to chase missing receipts, and never file a Mexican monthly return assuming a withholding you cannot yet evidence.

6. Watch the edges of the regime​

A few adjacent rules can surprise sellers. Platforms must report transactions involving foreign accounts separately. Lodging sellers have property addresses exposed. Goods sellers need import and tariff flags correct. And the reform's headline-grabbing 8% excise tax on violent-content video games — on top of 16% VAT — was neutralized by a 100% fiscal stimulus decree days after enactment, a reminder that in a fast-moving reform year, the gazette matters more than the press release. Confirm the current rule text before pricing.

Common Mistakes to Avoid​

• Booking the net payout as revenue. This understates both sales and VAT payable, and the withheld amounts vanish from your books instead of becoming credits.
• Ignoring the 2.5% income tax withholding at year end. It is creditable against provisional payments and the annual return — but only if tracked and claimed.
• Mixing personal and business selling. The B2B extension means your company sales now face withholding like individual sales always did; running business volume through a personal account compounds the documentation mess.
• Assuming one platform's paperwork covers another. Each platform withholds and receipts independently. Consolidation happens in your books, not theirs.
• Letting FX hide the math. If you convert peso payouts to dollars on receipt, reconcile the withholding in pesos first, then record the exchange difference separately. Blending the two makes SAT-traceable amounts unprovable in your own ledger.

Keep Your Cross-Border Books Audit-Ready​

Mexico's 2026 platform rules boil down to a simple bargain: the state lets marketplaces collect the tax for it, gives itself a live feed of the underlying data, and leaves you to prove — receipt by receipt — that what was withheld matches what you owe. Sellers who register correctly, reconcile monthly, and keep their master data clean will find the regime merely administrative. Sellers who treat payouts as pocket money will pay the maximum rates and struggle to credit a peso of it back.

That is fundamentally a bookkeeping discipline problem: separate accounts for gross sales, VAT charged, VAT withheld recoverable, and income tax withheld recoverable; a monthly routine that matches every payout to its receipts before filing; and a single source of truth for your tax identity across every channel you sell through. Set that machinery up once, and each new marketplace or rule change becomes a configuration detail rather than a fire drill.

Simplify Your Financial Management​

As you expand into cross-border channels like Mexico's marketplaces, maintaining clear, granular financial records is what turns a maze of withholdings and receipts into routine monthly filings. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.