Mileage reimbursement for international trips
Learn how to calculate and document mileage reimbursement during international business trips.
Why international trips demand extra care
International business trips present unique challenges for mileage reimbursement, especially when renting vehicles at the destination. Unlike a domestic trip, where the per-kilometer rate and currency are predictable, the international scenario combines fluctuating exchange rates, another country's tax rules, and receipts in different languages and formats.
Before departure, it is worth aligning with finance on exactly what will be covered: fuel, car rental, tolls, parking, and insurance. The clearer the scope is before the trip, the lower the risk of a rejected expense when the employee submits their report after returning home.
Decide the reimbursement currency before you travel
The first practical decision is choosing which currency will be used for reimbursement.[^irs-foreign-perdiem] Some companies convert everything to their home currency based on the exchange rate on the date of the expense, while others prefer to keep amounts in the foreign currency and convert only at closing. Both approaches are valid, but they must be defined by policy to avoid case-by-case disputes.
Documenting the exchange rate used in each conversion is as important as keeping the receipt. In an audit, the IRS may question the conversion method, and having the source and date of the rate on record settles the matter in seconds.
Handling rented vehicles abroad
For rented vehicles, the ideal approach is to document the rental amount, fuel, and tolls separately. These costs can be fully or partially reimbursed according to company policy, and separating them makes it easier to analyze each expense category.
Pay attention to rental contract extras: additional insurance, one-way drop-off fees, and cross-border charges often appear on the invoice and are not always reimbursable. Reviewing the contract at pickup avoids surprises at closing.
Fuel, tolls, and incidental expenses
Fuel abroad is usually paid in local currency, and the receipt does not always show liters or mileage. For that reason, record the odometer at the start and end of the rental period whenever possible, creating a physical record of the distance driven for business.
Electronic tolls and app-paid parking generate digital receipts that are easily lost. Save every email and screenshot in a single trip folder, clearly separating business use from personal travel.
How Quilometragem supports multi-currency
Quilometragem supports multiple currencies, allowing receipt creation in BRL, USD, MXN, COP, or the destination's local currency. Exchange conversion can be done automatically based on daily rates, which eliminates parallel spreadsheets and error-prone manual calculations.
With the GPS app, the employee records the route while driving and generates a standardized receipt at the end. On return, the CSV export to Clara consolidates everything into the approval and payment workflow, keeping the same structure used for domestic trips.
Keep all original documentation
Keep all original receipts: the rental contract, fuel receipts, toll invoices, and parking confirmations. These documents are essential for audits and for international tax compliance, especially when the expense affects tax calculations back home.
It is recommended to retain files for at least five years, the same period applied to other records. A digital archive organized by trip, with clear file names, is worth far more than a pile of loose papers in a drawer.
Best practices to standardize the process
Create an international travel checklist and hand it to every employee before departure. Items such as "set the currency," "photograph the odometer," and "save the rental contract" reduce the chance of missing information when the expense report reaches finance.
Finally, review the policy periodically. As the company expands into new countries, particularities around exchange rates, taxes, and receipt formats emerge. Adjusting the process based on real trips keeps reimbursement fair for the employee and safe for the company.
A short post-trip debrief can be just as valuable as the upfront checklist. Asking employees what was unclear, which receipts were hard to obtain, or where the policy fell short turns each trip into a chance to refine the process. Over time, these small improvements compound into a smooth, predictable workflow that travelers trust and finance can rely on.
[^irs-foreign-perdiem]: U.S. Department of State — Foreign Per Diem Rates [^rfb-internacional]: Receita Federal — Despesas com viagens ao exterior