Wiring Money to Mexico: Currency, Banks, Limits

Wiring money across borders feels like it should be the hardest part of buying land in Mexico. In practice it is routine — thousands of foreign buyers move funds into Oaxaca every year — but it is also where a surprising number of deals go sideways, and where the quiet costs hide. This guide walks through how the money actually travels, what your bank needs from you, what the exchange rate really costs, and which rules you should know before you press send.

Key facts

Closing funds move through the notario's account — never directly to the seller.
Wires over $10,000 USD trigger federal reporting in the US; it is routine, not suspicious.
The exchange-rate spread often costs more than the wire fee — compare it before you commit.
Never act on changed wiring details sent by email — verify by phone or in person first.
Keep every receipt and reference number — for the reporting systems, and for your accountant.

The path of funds

How money actually moves in a Mexican land purchase

In a Mexican real-estate closing, the buyer's money does not go to the seller. It goes to the notario — a licensed lawyer appointed by the state, whose job is to make the transfer legally valid — and the notario pays the seller only after the deed is signed and the title checks out.

The notario holds purchase funds in a dedicated client account (cuenta de clientes), separate from his own money. The structure protects both sides: you are not handing a stranger tens of thousands of dollars on a promise, and the seller is not handing over the land before being paid. Your deposit under the promesa de compraventa (the purchase promise) may sit with the broker or the notario, depending on the agreement; the balance goes to the notario's account at closing, and the seller is paid from there once the escritura is signed and filed for registration.

If the lot is beachfront and the purchase runs through a fideicomiso — the bank trust that holds title inside the restricted zone — funds may move to the trustee bank's account instead. Either way the principle is identical: money follows paperwork, through a licensed intermediary, never straight to the seller. The full sequence, from promesa to registered deed, is laid out in our complete guide to buying land in Oaxaca, and the notario's role deserves its own close look — here is how the notario system works.

The wire

SWIFT wires: banks, routing, and what you'll need

A SWIFT wire is how banks move money between countries. You initiate it from your US bank — online or in a branch — and it travels through a chain of correspondent banks until it lands in the Mexican bank's system and finally in the notario's account. It usually takes one to three business days, and "usually" is the operative word: international wires do not move on a same-day guarantee.

To send one, you need the following, exactly as the receiving bank holds them:

The beneficiary name — the legal name on the account, spelled exactly as registered. A mismatch is the most common cause of delays and returned wires.
The bank's SWIFT/BIC code — the eight-to-eleven-character identifier for the Mexican bank.
The CLABE — the 18-digit account number used in Mexico — or the account number the notario gives you.
The bank name and address, plus the branch if relevant.
A reference — your name, the property, and the contract number, so the notario's office can match the funds to your file.

Get the instructions in writing from the notario's office, on letterhead. Both banks will quote the routing from that single document, so the only thing that matters is that the document is real — more on that in the warning signs below.

The exchange

Currency and exchange: USD to MXN, who sets the rate, and the spread

Land on the Oaxaca coast is usually priced in pesos, even when the listing quotes dollars. Your contract will state the price in MXN and define the exchange rate used — a fixed rate written into the promesa, or the rate on a specific date. Read that clause before you sign; it decides how many pesos your dollars buy.

Somewhere between your US bank and the notario's account, your dollars become pesos, and that conversion is where the real cost lives. The interbank rate is the wholesale rate banks trade among themselves; the rate you get is the interbank rate minus a spread. On a bank wire the spread typically runs 1–3% — on a transfer of roughly $100,000, that is $1,000 to $3,000 that never reaches the notario.

Who sets it? Your bank sets the rate it offers you. The notario's office can also convert on your behalf, and dedicated currency services often quote tighter spreads than retail banks. The honest advice: ask for the rate in writing, compare it with the interbank rate at that moment, and treat the difference as a cost line, not a footnote. Side by side, you will see why the spread matters more than the wire fee.

The reporting

Limits and reporting: what the US and Mexico watch

Moving five or six figures across a border attracts attention — legitimate attention. Both countries have reporting systems built for exactly this kind of transaction, and none of them are a problem as long as the money is yours, the paperwork is real, and you keep records.

Threshold	Who reports	What it means
Wire over $10,000 USD	Your US bank, to FinCEN under the Bank Secrecy Act	A routine Currency Transaction Report. It flags the transfer to regulators, not to suspicion of you. Deliberately splitting wires to stay under the threshold — structuring — is a crime.
Foreign accounts totaling over $10,000 USD at any point in the year	You, as a US person, on FinCEN Form 114 (FBAR)	A reporting requirement, not a tax. If your Mexican bank account or trust balances cross the line, file. Penalties for not filing are steep.
Cash and large movements above Mexican thresholds	Mexican banks, to the tax authority (SAT)	Anti-money-laundering reporting on cash deposits and large transfers. Keep documents proving where the funds came from.

Keep this general on purpose: thresholds change, the rules differ for non-US buyers, and FATCA and other regimes add layers. A CPA who works with cross-border buyers is worth their fee here. This article is information, not tax advice — the person who knows your exact situation is the accountant, not the internet.

The costs

What it costs: fees, intermediary banks, and exchange spreads

Three separate charges stack up on an international wire. Ask each bank for its full schedule before you commit.

Cost	Typical range	Notes
Outgoing wire fee (US bank)	$25–50 USD	International wires cost more than domestic ones; some banks waive the fee on premium accounts.
Intermediary bank fees	$10–40 USD	Correspondent banks take their cut from the amount in transit — the notario may receive slightly less than you sent.
Incoming wire fee (Mexican bank)	$0–25 USD	Some Mexican banks charge for receipt; ask the notario's office what their bank does.
Exchange spread	1–3% of the amount	The big one. On a $100,000 transfer it can cost more than all the fees combined.

Two questions to ask before wiring: "What exactly will the recipient receive?" and "What rate are you converting at?" If the answer to either is vague, get it in writing. And for context: the fees above are a rounding error next to closing costs, which we itemize honestly in the real numbers on closing costs in Oaxaca.

The warning signs

Red flags: personal accounts, urgency, changed details

The scams that catch foreign buyers almost never involve fake deeds anymore — they involve fake wiring instructions. If you wire into the wrong account, the money is gone in hours, and no regulator on either side of the border is going to chase it for you. Walk away from any of these:

A request to wire to a personal account — the seller's, the broker's, or anyone else's. Funds go through the notario's client account, full stop.
Urgency. "Closing is tomorrow, wire today." Legitimate closings are scheduled weeks ahead, with the date written into the promesa.
Changed wiring details by email. The classic: instructions that were "updated" at the last minute. Verify any change by phone, on a number you already have — not one from the email.
An account name that doesn't match the contract, or a bank that doesn't match the notario's letterhead.
Requests to split the wire into pieces "to keep it simple." That is structuring, it is illegal, and it is a favor you should never do.

The pattern behind every one of these is the same: pressure to move money faster than you can verify where it is going. We catalog the other common traps in our guide to scams in Mexican land sales — the wiring fraud is the one that actually collects.

A wire you can't trace is a gift you can't take back. The money moves in minutes; the verification should move first.

The sequence

A safer order of operations for moving money for a purchase

None of this is complicated, but the order matters. Here is the sequence that keeps your money traceable and your closing calm:

Get the instructions in writing. The notario's letterhead, with the account name matching the contract.
Verify them out of band. Call the notario's office on a number you already have — or better, confirm in person if you are on the coast.
Send a small test wire — a few hundred dollars — and confirm with the notario's office that it arrived and was identified to your file.
Wire the balance two to three business days before closing, to absorb intermediary delays and the occasional bank holiday.
Send the reference number to the notario's office the same day, and keep the confirmation.
Confirm cleared funds with the notario before the closing date. If anything is short or missing, better to know it early.

Keep every receipt, reference, and confirmation — your accountant will want them, and so will the reporting systems described above. For our part: The Slow Coast never holds buyer money, never takes deposits, and never sits between you and the notario. Every payment moves directly to licensed brokers and notarios under Mexican law — the same route we have been describing. The money is yours; the trail should be too.