Short-Term Rental Accounting in Mexico: The RFC, ISR, and IVA Playbook for Cabo Hosts

You bought the condo, listed it on Airbnb, and the bookings rolled in. But nobody told you that Mexico expects you to register for a tax ID, file monthly income declarations, charge value-added tax on every booking, and keep records that would make your US accountant weep. Here is the tax accounting playbook for Mexico short-term rentals that most Cabo hosts learn about two years too late.

The RFC: Your Mexican Tax ID

The RFC (Registro Federal de Contribuyentes) is Mexico's taxpayer identification number, issued by the SAT (Servicio de Administración Tributaria — Mexico's IRS equivalent). Every person or entity earning income in Mexico needs one.

As a foreign property owner earning rental income, you need to register with the SAT and obtain your RFC. The process requires:

1. CURP — your Mexican population registry number (obtainable as a foreign resident)
2. Proof of address in Mexico — a utility bill or predial receipt in your name
3. Valid passport
4. In-person appointment at a SAT office or through your fiscal representative

Most foreign owners work through a Mexican accountant (contador) who acts as their fiscal representative. The contador handles the RFC registration, the e.firma (electronic signature required for filing), and all ongoing declarations. Cost: typically $200–$400 USD per month for full monthly filing services.

ISR: Mexico's Income Tax on Your Rental Revenue

ISR (Impuesto Sobre la Renta) is Mexico's income tax. Rental income is taxable, and the rate depends on which tax regime you register under:

Régimen General (General Regime)

Progressive rates from 1.92% to 35%. You can deduct actual expenses — property management fees, maintenance, repairs, utilities, depreciation, insurance, and property taxes. This regime makes sense for owners with significant deductible expenses.

RESICO (Simplified Trust Regime)

Available for individuals with annual income under approximately 3.5 million pesos (~$175,000 USD). Rates range from 1% to 2.5% of gross revenue, with minimal deductions. This is simpler and often cheaper for owners with moderate rental income and few deductible expenses.

Your contador will recommend the optimal regime based on your income level and expense structure. The choice matters — it can mean the difference between a 2% effective rate and a 25% effective rate.

Monthly Provisional Payments

Unlike the US, where you can defer rental income tax to April, Mexico requires monthly provisional payments. By the 17th of each month, you must declare the prior month's rental income and pay the estimated ISR. These monthly payments are credited against your annual declaration filed in April.

IVA: The 16% Value-Added Tax

IVA (Impuesto al Valor Agregado) is Mexico's value-added tax, charged at 16% on most goods and services — including short-term lodging. This is the tax most foreign owners miss entirely.

Key points:

• Short-term rentals (less than one month) are subject to 16% IVA
• Long-term residential rentals (one month or more) are exempt from IVA
• Airbnb and similar platforms withhold a portion of IVA and remit it to the SAT on your behalf — but the withholding may not cover the full 16%, leaving you responsible for the difference
• You must issue facturas (official invoices) for each booking through the SAT's electronic invoicing system
• IVA you pay on deductible expenses (property management, repairs, supplies) can be credited against the IVA you collect, reducing your net IVA liability

The practical impact: if your nightly rate is $300 USD, the guest should technically be charged $348 (including 16% IVA). Most platforms handle this in pricing, but you need to ensure your accounting reflects the IVA component separately.

ISH: The State Lodging Tax

Baja California Sur charges a 3% ISH (Impuesto Sobre Hospedaje) — a state-level lodging tax — on short-term accommodations. This is separate from IVA and ISR. Some platforms (Airbnb, VRBO) collect and remit this automatically in certain jurisdictions; others do not. Verify with your contador whether your platform handles ISH or whether you need to declare and pay it separately to the state.

What Airbnb Actually Withholds

Airbnb's Mexico withholding is a source of confusion. As of 2026, Airbnb withholds:

• ISR: A percentage of your gross revenue (currently around 4% for hosts without an RFC on file, reduced or eliminated for hosts who provide their RFC and active fiscal registration)
• IVA: A percentage of the service fee and potentially the listing price
• ISH: In some BCS municipalities, automatically collected from guests

The critical point: Airbnb's withholdings are not your full tax liability. They are provisional credits. Your contador must reconcile what Airbnb withheld against what you actually owe in your monthly and annual declarations. If the withholding exceeds your liability, you can claim a credit. If it falls short, you owe the difference.

The US Side: Double Reporting, Not Double Taxation

If you are a US person, you report your Mexico rental income on your US return as well (Schedule E). The foreign tax credit (Form 1116) prevents double taxation — you credit the Mexican ISR paid against your US tax on the same income. The IVA, being a consumption tax, is generally not creditable as a foreign income tax but may be deductible as a business expense.

You will also need to file:

• FBAR (FinCEN 114) if your Mexican bank and trust accounts exceed $10,000 in aggregate at any point during the year
• Form 8938 if your foreign financial assets exceed the filing threshold ($50,000 for single filers, $100,000 for married filing jointly, at year-end)
• Form 3520 potentially, for the fideicomiso itself, depending on how the IRS classifies the trust structure

The Enforcement Reality

The SAT has stepped up enforcement on foreign property owners in Baja California Sur since 2024. Audits are more common, and the SAT's data-sharing agreements with platforms like Airbnb mean they know exactly how much revenue your property generates. Non-compliance penalties include:

• 55–75% of unpaid taxes in fines
• Interest (recargos) on outstanding balances at roughly 1.47% per month
• Potential restriction of your RFC, which can complicate future property transactions

The days of operating a Cabo Airbnb under the radar are over. Get compliant before you get audited.

My Take

The tax accounting for a Mexico rental property is more complex than most US owners expect. But it is not unmanageable. A competent Mexican contador handles your monthly filings for $200–$400/month, and a cross-border CPA coordinates the US side. The total compliance cost is typically $5,000–$8,000 per year. If your rental generates $40,000–$80,000 in gross revenue, that compliance cost is 6–12% of revenue — a cost of doing business, not a deal-breaker. The alternative — ignoring the requirements — is a ticking time bomb.