Mileage policies in Mexican companies
How to structure corporate mileage reimbursement policies in compliance with Mexican legislation.
Why a formal policy matters in Mexico[^sat-politica-38]
A well-designed mileage policy has stopped being optional for companies operating in Mexico in 2025. The combination of SAT electronic audits, IMSS-INFONAVIT data integration, and mandatory digital CFDI has made improvisation expensive. A formal policy is the document that unites rule, process, and tool in a single place, and it's the first item an auditor asks for in any review. Companies with mature policies typically pass audits with zero disallowances, while companies without policies lose an average of 18% of expenses in review.
Essential elements every policy must include
A complete policy covers nine topics: who is eligible for reimbursement (roles, departments, projects), which vehicles qualify (own, rented, shared), rate table by vehicle type, clear definition of what counts as a business trip, approval flow with deadlines, documentation requirements (CFDI, log), payment method and timing, rules for special cases (international travel, electric vehicles, emergency situations), and penalties for misuse. A policy missing any of these topics creates a gray zone.
Setting rates based on SAT references
SAT publishes annually the deduction limits for vehicle use, and the market positions itself around these values. For 2025, the most common band among mid-size companies is MXN 4.00 to 5.20 per km for compact cars, MXN 4.80 to 6.20 for mid-size sedans, and MXN 5.80 to 7.80 for SUVs. Companies can pay below these values without complications, but paying above requires documented justification (vehicle type, region with higher fuel costs, intensive use). Semestral table review is common practice among mature companies.
Designing the approval flow
An efficient approval flow combines simplicity and control. The most common configuration is: the employee logs the trip and the log within 48 hours of returning, the direct manager approves within three business days, and finance processes the payment in the weekly or biweekly window. Automated flows with real-time visibility reduce fraud by up to 40% and prevent the accumulation of receipts from previous months that complicate the accounting close.
IMSS and INFONAVIT compliance requirements
In Mexico, mileage reimbursement is not part of the Base Contribution Salary (SBC) for IMSS and INFONAVIT purposes, as long as it is duly proven as a travel expense. If the company pays a fixed monthly amount without a trip log, that amount is reclassified as wages and generates liabilities for unpaid social security contributions. The policy must be explicit about the compensatory nature of the payment to shield the company during desk audits from these institutions.
How Quilometragem operationalizes the policy
The tool allows configuring company policy directly in the software. Rates by vehicle type are locked according to the official table, the approval flow follows the organizational hierarchy, and mandatory fields for the trip log are validated by GPS. Employees cannot submit a reimbursement without minimum data, which drastically reduces finance's work in returning incomplete reports. Integration with Clara allows payment via corporate card or transfer with automatic reconciliation.
Internal audit and continuous improvement
A robust policy provides for sample audits. Monthly, finance should review 5% of approved reimbursements, checking consistency between trip purpose and the route taken. If distortions are found, the policy should be adjusted and employees retrained. The mileage policy is a living document that must reflect changes in operating costs and Mexican tax law.