Taxpayers in Mexico must maintain formal written contracts when lending money to family or friends to avoid being taxed by the Tax Administration Service (SAT). Without proper documentation, the tax authority may treat the transfer of funds as undeclared income rather than a loan.
An accountant and member of the CCPM emphasizes that a contract is the essential element that provides legal validity to these private operations. "I always request a contract when I make a loan," the specialist stated.
To satisfy tax authorities, the document must clearly identify the specific details of the transaction. This includes the total amount, the repayment term, the payment method, and the specific conditions regarding interest.
The specialist warned that a lack of documentation shifts the burden of proof onto the taxpayer. "Without documentation, the authority will not recognize the loan," he said.
Ensuring financial traceability
Beyond the contract, the taxpayer must provide a clear trail of the money's movement. This requires proving both the initial delivery of the funds and the subsequent repayment through traceable bank records.
Discrepancies in these records can lead to inconsistencies that trigger audits. The specialist noted that the movement of money must be verifiable to avoid being flagged for investigation.
The tax implications change once the amount exceeds certain thresholds. For example, a loan of 1.2 million pesos paid in 12 monthly installments without interest does not generate a tax liability on the principal amount.
"It is the recovery of capital," the accountant explained, noting that the amount does not constitute a profit.
However, the taxpayer still carries reporting obligations. If a loan exceeds 600,000 pesos within a single year, the transaction must be declared as an informative notice to the authorities.
The tax authority also relies on data consistency between both parties involved in the transaction. The lender and the borrower must both report the operation so the SAT can cross-reference the information.
"The other party must also declare the operation so the authority can cross the data," the specialist said. This alignment prevents discrepancies that could trigger a formal tax review.
