# How to create business mileage policies

> Practical guide to establish fair and efficient mileage reimbursement policies in your company.

**Author:** Marina Costa — Brazilian Tax & Compliance Specialist  
**Published:** 2025-10-01  
**Updated:** 2026-06-13  
**URL:** https://quilometragem.com/blog/how-to-create-business-mileage-policies

**TL;DR:** How to draft a fair, clear, audit-proof mileage policy from start to finish.

- Define eligibility and which trips are reimbursable with objective criteria.
- Build the per-kilometer rate by adding real costs plus a margin.
- Set submission deadlines and a tiered approval workflow for requests.
- Document everything, retain for five years, and review the policy yearly.

## Why every company needs a mileage policy

A well-written mileage reimbursement policy protects the company and the employee at the same time. Without clear rules, every request becomes a case-by-case negotiation, managers approve inconsistent amounts, and the finance department is exposed in any future audit. With an objective policy, everyone knows exactly what can be reimbursed, which rate applies, and which documents are mandatory.

The policy also sets the tone of the company's financial culture. When the rules are fair, transparent, and easy to follow, adoption is high and fraud drops. If you are still building the fundamentals of the topic, it helps to first review how mileage reimbursement works, because the policy relies on those basic concepts.

In this guide you will see how to design a complete policy: eligibility, reimbursable trips, the rate-setting method, deadlines, the approval workflow, caps, documentation, retention, and review cadence. At the end there is a ready-to-adapt skeleton.

## Defining eligibility: who and what is reimbursable

The first block of the policy answers a simple question: who is entitled to reimbursement? Usually it is employees, contractors, and partners who use a personal vehicle for previously authorized work tasks. Company fleet vehicles follow a different rule, since fuel is already paid directly.

Next, define what counts as a work trip. Objective criteria prevent arguments: client visits, travel between units, trips to suppliers, events, and external training are typically eligible. The commute between home and a fixed workplace is not reimbursable, because it is considered personal travel.

Also set prerequisites: the employee must have manager authorization, a valid license, and up-to-date vehicle insurance. These details reduce legal risk and make it clear that reimbursement is a benefit conditioned on rules.

## Reimbursable vs non-reimbursable trips

Create two explicit lists. In the reimbursable column: commercial visits, deliveries, inspections, travel between offices on the same day, and trips to industry events. In the non-reimbursable column: the daily commute, personal detours during the workday, fines, car washes, and routine vehicle maintenance.

Handle mixed days carefully, when the employee combines personal and business travel. The practical rule is to reimburse only the additional mileage generated by the work task, subtracting the leg the employee would have driven anyway. This principle also influences the tax deduction for mileage expenses, so aligning the two topics avoids rework.

Document exceptions: heavy rain, tolls, paid parking, and using a ride-hailing app when the personal car is unavailable. Deciding this in advance prevents improvisation at approval time.

## How to set the rate per kilometer

There are three main methods to fix the rate. The first is to adopt an official benchmark, such as the standard rate used by tax authorities; many multinationals anchor their figures to the IRS standard mileage rate because it is widely recognized. The second is to research the market and track what competitors pay. The third, and most precise, is to build the rate from the bottom up by adding the vehicle's real costs.

The bottom-up method is the most defensible in an audit because every cent has a justification. You add fuel, maintenance, depreciation, and insurance per kilometer, and apply a margin for contingencies. The result is a rate that covers the real cost without generating undue profit for the employee, which is exactly what tax authorities expect.[^rfb-substantiation]

Regardless of the method, record the source and date of the calculation. Rates frozen for years lose touch with reality and generate complaints; the ideal is to review them at least once a year.

## Worked example: building the rate from the bottom up

Let's build the rate per kilometer for a typical passenger car. Start with the four cost components, all per kilometer driven:

Fuel: US$0.18. Maintenance (oil, tires, services): US$0.06. Vehicle depreciation: US$0.28. Insurance proportional to use: US$0.10.

Adding the four components: US$0.18 + US$0.06 + US$0.28 + US$0.10 = US$0.62 per mile. That is the direct cost. To cover contingencies such as fuel price swings, add a 10% margin: US$0.62 × 1.10 = US$0.68 per mile.

Now apply the rate to a monthly volume. A sales rep who drives 600 miles per month at US$0.68 receives US$408 of monthly reimbursement, or US$4,896 per year. If the company used an old rate of US$0.56, it would pay only US$336 per month and the employee would absorb US$72 of real cost out of pocket — a clear sign the rate was outdated.

The same structure works in other currencies, swapping only the local figures. In Brazilian reais, per kilometer: fuel R$0.55 + maintenance R$0.18 + depreciation R$0.22 + insurance R$0.10 = R$1.05, plus 10% = R$1.15 per kilometer; over 1,000 km that is R$1,150 per month. In Mexican pesos, per kilometer: gasoline $2.80 + maintenance $0.90 + depreciation $1.10 + insurance $0.50 = $5.30, plus 10% = $5.83 per kilometer; over 1,000 km that is $5,830 MXN per month.

## Submission deadlines and approval workflow

Set a realistic deadline for submitting receipts, usually between 30 and 90 days after the trip. Deadlines that are too short punish heavy travelers; ones that are too long disrupt the accounting close. Thirty days is often the ideal balance and reinforces immediate trip logging.

The approval workflow should have clear tiers. Requests within policy and below a cap can be auto-approved; amounts above the cap require manager approval; exceptional cases escalate to finance leadership. This segregation speeds up the process and keeps control.

Include in the policy what happens when a request is rejected: the employee receives the reason, corrects it, and resubmits within an additional window. Transparency in rejections avoids resentment and improves the quality of future requests.

## Documentation, retention, and review cadence

Each reimbursement needs a minimum set of information: date, origin and destination, distance, business purpose, client or project, and the vehicle used. The more complete the record, the easier it is to defend the amount in an inspection.

Define the document retention period. Keeping receipts for at least five years is a prudent practice, aligned with the statute of limitations for taxes. Store the files in a digital format with an integrity trail, so no one can alter a receipt without leaving a trace.

Finally, establish a review cadence. Review rates annually, caps every six months, and the full policy text whenever there is a relevant change in legislation or operations. Tools like Quilometragem apply these rules automatically and generate the reports needed for audit, reducing the finance team's manual work.

## A ready-to-use policy skeleton

Use the structure below as a starting point and adapt it to your context. Section 1 — Purpose and scope: who is covered and why. Section 2 — Eligibility: employee and vehicle requirements. Section 3 — Reimbursable and non-reimbursable trips, with examples. Section 4 — Rate per kilometer and calculation method, with the source. Section 5 — Daily and monthly caps. Section 6 — Submission deadlines and approval workflow. Section 7 — Mandatory documentation and retention. Section 8 — Review cadence and owners.

A short, clear policy enforced by software is far more effective than a long document no one reads. Start simple, communicate well, and adjust based on your company's real reimbursement data. Distribute the final text to the whole team, ask for a read confirmation, and keep a dated version in the system so any future change stays traceable. When the policy is born from real numbers, communicated clearly, and applied automatically, mileage reimbursement stops being a source of friction and becomes a predictable, fair, and fully defensible process in front of any tax audit. That combination of fairness and automation is what keeps both employees and auditors satisfied year after year.

## Frequently asked questions

### How often should I review the rate per kilometer?

Review the rate at least once a year, or whenever the fuel price changes significantly. Rates frozen for too long leave the employee paying costs out of pocket and generate complaints.

### What submission deadline for receipts is ideal?

Thirty days after the trip is usually the best balance. It is short enough to encourage immediate logging and long enough not to punish frequent travelers. You can extend it to 60 or 90 days in seasonal operations.

### Should the policy define monthly mileage caps?

Caps are useful to prevent abuse, but they should be flexible. Set a reasonable ceiling that covers most cases and allow exceptions with documented manager approval. Overly rigid caps penalize employees with legitimately long routes.

## Sources

- [Receita Federal — Despesas com veículos](https://www.gov.br/receitafederal/pt-br) — Receita Federal do Brasil (2026-04-28)