Banking in Mexico as an American: the W-9, the CLABE and getting your dollars south

Yes, Mexican banks open accounts for US citizens every day. The trick is showing up as a resident with the right papers, not as a tourist with a passport.

The short version

• Mexico has a Model 1 FATCA agreement with the US, in force since 2014 [1]. Mexican banks collect your US tax details and report through Mexico's tax authority, so expect a Form W-9 or the bank's own FATCA self-certification.
• Most big banks want a resident card (residente temporal or permanente), your passport and a recent Mexican proof of address. Tourists rarely get a full checking account.
• Mexico runs on SPEI, Banxico's instant transfer system. Your 18-digit CLABE is the number everyone, from your landlord to your gym, will ask for [2].
• Deposits at Mexican commercial banks are insured by IPAB up to 400,000 UDIs per person per bank [3]. That's well into the millions of pesos.
• Uncle Sam still wants to hear about the account: an FBAR once your foreign accounts top USD 10,000 combined, and maybe Form 8938 [4][5].

Who's in charge of what

It helps to know the players before you walk into a branch.

The UDI is an inflation-indexed unit, so the IPAB limit in pesos rises over time. A 2024 CONDUSEF article put it at roughly MXN 3.25 million [3], or about USD 170,000. USD conversions use the Banco de México FIX rate of 18.7147 pesos per dollar (November 5, 2026) [10]. IPAB does not cover brokerage accounts, investment funds (sociedades de inversión), cooperatives (cajas de ahorro) or insurance products [3]. Keep that in mind before you chase a high rate at a non-bank.

What the bank will ask an American for

Branch staff in Polanco or Santa Fe see foreigners all the time. A branch in a quieter neighborhood may need to call head office. Either way, bring everything at once:

1. Passport, valid, with the same name as everything else.
2. Your migration document. For a full account that usually means the residente temporal or residente permanente card from INM. BBVA México, for example, lists a passport, a migration form and proof of address as the core documents for foreigners [6]. A tourist entry (FMM) gets you nowhere at most banks.
3. Proof of address in Mexico, usually a utility, phone or internet bill no more than about three months old. If the bill isn't in your name, ask what the bank accepts; some take a lease plus the landlord's bill.
4. CURP, the personal ID number on your resident card. Many forms ask for it.
5. RFC, your Mexican tax ID, if you have one. It's often optional for a basic account and required for payroll or business accounts.
6. FATCA paperwork. Expect to declare that you're a US citizen and give your Social Security number. Some banks hand you an IRS Form W-9; others use a Spanish self-certification form that asks the same things.

Don't fudge your citizenship or your US birthplace. Banks look for "US indicia" such as a US place of birth, a US phone number or a US address, and they re-check files. A bad self-certification is a fast route to a frozen account.

Which banks?

The large retail banks in Mexico City include BBVA México, Banorte, Santander México, Banamex, Scotiabank and HSBC México. All of them operate under the same FATCA agreement, and all of them have American customers. Policies change by product and even by branch, so ask before you book an appointment: "¿Abren cuentas a ciudadanos estadounidenses con residencia temporal?" Ask other Americans which branches said yes lately; our community group for Americans in Mexico is a good place to compare notes.

If a bank says no, it's usually about your migration status, not your passport. Wait until the resident card is in hand, then try again.

SPEI and the CLABE: how Mexico moves money

Back home in the States, you might still mail a check now and then. In Mexico City, almost nobody does. Rent, utilities, your housekeeper, the dentist and the guy who fixes your water heater will all ask for a transfer.

That transfer runs on SPEI, the Sistema de Pagos Electrónicos Interbancarios, run by Banxico. According to Banxico, a SPEI payment should land within about 30 seconds after your bank approves it, and mobile banking payments are available 24 hours a day [2]. You send money using one of three identifiers [2]:

• the recipient's 18-digit CLABE (the standardized bank code; think routing plus account number in one)
• their 16-digit debit card number
• their 10-digit cell phone number linked to the account

A few practical heads-ups:

• New payees take time. Banks often make you wait before a newly registered account can receive money through internet banking, and mobile payments above 250 UDIs need a pre-registered recipient [2]. Set up your landlord's CLABE days before rent is due.
• Keep the CEP. Banxico issues an electronic payment receipt (Comprobante Electrónico de Pago) for each transfer. It's your proof if a landlord says the money never showed up.
• Double-check names. Your app will usually show the recipient's name once you type the CLABE. If it doesn't match, stop.

Moving money from the US to Mexico

Most Americans in CDMX keep a US checking account for Social Security, a US paycheck or 401(k) withdrawals, and move money south as needed. Your options:

If you get Social Security, you can keep it going to your US bank or switch to International Direct Deposit to a Mexican account [8]. Many retirees keep the US account anyway, since Medicare premiums and US bills still come out of it.

A US debit card with no foreign transaction or ATM fees is a no-brainer for your first months, before the Mexican account is open. Withdraw from ATMs inside bank branches or malls, not on the street. When an ATM or card terminal offers to charge you in dollars, say no and pay in pesos; the "dynamic currency conversion" rate is rarely in your favor.

Dollar accounts in Mexico

Don't count on a US-dollar checking account at a CDMX branch. Banamex, for example, only opens its dollar checking account for individuals who live in the 20 km (12-mile) strip along the US border or in Baja California and Baja California Sur, plus accredited staff of foreign missions and international organizations [9]. For most Americans in the capital, the simplest plan is to keep dollars stateside and convert when you need pesos.

What you still owe Uncle Sam

FATCA puts reporting duties on the bank. You have your own:

The FBAR is filed online through FinCEN's BSA E-Filing System, not with your 1040 [4]. Mexican peso interest is taxable in the US, even if your bank withheld Mexican tax on it. A US expat tax preparer can check your situation, including how the US–Mexico tax treaty and the foreign tax credit apply.

Getting it done in your first month

1. Get your resident card first. Bank accounts, phone contracts and leases all go smoother with it.
2. Get your RFC from SAT if you'll work, invoice or want a payroll account.
3. Ask before you go. Call or email the branch to confirm they open accounts for US citizens and what proof of address they take.
4. Bring the full stack: passport, resident card, CURP, proof of address, SSN and, if you can, a filled-in W-9.
5. Turn on the app and the token at the branch. Most banks tie mobile banking to your Mexican cell phone number, so get a local SIM first.
6. Register your regular payees a few days ahead.
7. Add the account to your FBAR list with this year's highest balance.

Sources

1. US Treasury: Foreign Account Tax Compliance Act (IGA list, Mexico Model 1)
2. Banco de México: SPEI information
3. CONDUSEF: Tus ahorros están a salvo (IPAB deposit insurance)
4. FinCEN: Report Foreign Bank and Financial Accounts (FBAR)
5. IRS: Comparison of Form 8938 and FBAR requirements
6. BBVA México: requirements for foreigners working in Mexico
7. Banco de México: Directo a México
8. SSA: countries where international direct deposit is available
9. Banamex: US-dollar checking account eligibility
10. Banco de México: FIX exchange rate

Keep reading

• CURP and RFC: Mexico's ID and tax numbers
• Mexican taxes for Americans: how they fit with your US return
• FBAR: reporting your foreign bank accounts
• Sending money between the US and abroad