Cash Deposits in Mexico: The 15,000-Peso Line That Quietly Flags Your Account

Mexico's tax authorities require banks to report cash deposits of 15,000 pesos or more per month to the tax office. This is not a limit on how much cash you can deposit, but a reporting threshold. The 15,000-peso line quietly flags your account whenever the total cash deposited at one bank in a month exceeds this amount. Banks track this figure across all accounts at the same institution, so moving cash between accounts at one bank does not reset the count.

Cashier's cheques bought with cash are also included in the report. This rule applies to physical cash deposits made at a branch or ATM, as well as cash bought and deposited as cashier's cheques. Electronic transfers, such as SPEI payments, TEF payments, or ordinary bank wires, are not considered cash deposits and do not count towards the 15,000-peso threshold.

The reporting obligation falls on banks, which submit a monthly declaration to the tax authority (SAT). It is important for newcomers to Mexico to be aware of this rule. Crossing the 15,000-peso limit does not automatically trigger a fine, but the deposit becomes visible to the tax authority. The SAT can compare the reported cash deposits with the taxpayer's declared income.

If there is a discrepancy between the declared income and the reported cash deposits, it could lead to further scrutiny. For most people, a reported deposit will not result in any action, as long as the cash deposited matches their declared income. To avoid triggering this reporting rule, foreigners are advised to use transfers for large sums, keep receipts for any big cash deposits, and match their banking activities to the profile they provided to the tax authority.