Business Mileage Reimbursement Rate: How to Calculate & Manage Auto Expenses

If your employees frequently go on the road for work, then the IRS’s mileage reimbursement rate is something to get familiar with. Although reimbursements for work-related travel aren’t required in every state, they are standard practice to make sure your employees are properly compensated for the cost of using their vehicle. Done right, mileage reimbursements can save your business money during tax season, too.

The rules for mileage reimbursement change frequently: the IRS’s rate moves at least once per year, state-by-state rules can create new requirements for employers, and the way to properly track and report travel expenses can shift as new tools become available. In this guide, we’re going over the rules for business mileage reimbursement in 2026, explaining everything you need to know to properly track the miles driven by your employees and how to report them on your taxes.

If your business has a hard time keeping track of what employees spend at the pump, collecting receipts, or categorizing business travel expenses, consider the Slash Visa Platinum Card.¹ With Slash, each employee gets their own card with granular controls and preset limits. Your policies can require a receipt or memo when the card is used, so every transaction has a full paper trail. Every transaction shows up in the Slash dashboard in real time, and when it's time to close the books, you can export enriched transaction data to QuickBooks, NetSuite, Xero, and other accounting software. Together, Slash’s tools can help you separate business auto expenses from other categories more easily.

What is Mileage Reimbursement?

Mileage reimbursement is the money a business pays an employee (or contractor) to cover the cost of using their personal vehicle for work purposes. The reimbursement is an approximation of what it costs to drive that mile: fuel, maintenance, insurance, tires, and vehicle depreciation.

The most common approach is to reimburse at the IRS standard mileage rate, which for 2026 is 72.5 cents per mile for business use.

Mileage reimbursements are, foremost, something that keeps your employees happy; instead of asking them to subsidize the cost of doing business, covering mileage keeps them from paying out of pocket to do their jobs. In some cases, mileage reimbursements are required for businesses to remain compliant with state wage laws (California, Illinois, and Massachusetts require reimbursement for necessary business expenses). Both sides benefit in the end: when reimbursements are handled properly, the payment is tax-free to the employee and fully deductible to the business.

How to Calculate Mileage Reimbursement for Your Business

There are three ways to figure out what a business owes for a mile of driving: the standard mileage rate, the expense method, and a FAVR plan. The first two are much more common for everyday businesses, while the third is typically just for larger companies. Here's how each method works:

IRS standard mileage rate calculation

The business multiplies the number of documented business miles by the IRS rate for that year (72.5 cents for 2026) and pays that amount. No one has to track gas receipts, oil changes, or insurance premiums. The rate is designed to be a rough all-in estimate that covers those costs on average.

For example, say a field service technician drives 220 miles in a week visiting client sites. At the 2026 rate, the reimbursement is 220 × $0.725 = $159.50 for that week.

Importantly, miles commuting from home to the workplace are not reimbursable or deductible under IRS rules. They also don't include personal driving, side trips, or errands that happened during a work trip. The mileage log needs to distinguish business miles from everything else; many companies use an app or GPS-based tracker specifically intended for business use.

Expense method

The expense method reimburses (or deducts, for owners) the costs of operating the vehicle: gas, oil, tires, repairs, insurance, registration, lease payments or depreciation, and so on. The driver totals up the annual costs using receipts, invoices, and records of service, then multiplies by the percentage of miles that were driven for business. If 60% of the year's driving was for business, then 60% of the total operating cost gets reimbursed or deducted.

The expense method is more accurate for covering actual costs, but it can also be more labor intensive. Every receipt has to be saved, every repair logged, and the business-use percentage must be supported by a mileage log. If an employee pays at the pump or covers a repair on their Slash card, Twin (Slash's AI financial assistant) texts them asking for a photo of the receipt, and OCR matches it back to the transaction. Employees can add a memo explaining what the expense was for, which builds the substantiation the expense method requires without anyone having to chase paper receipts at month-end.

Fixed and variable rate plan

A FAVR (Fixed and Variable Rate) plan splits reimbursement into two components. The fixed portion is a set monthly amount that covers the ownership costs of a vehicle: insurance, license and registration fees, taxes, and depreciation. Those costs don't change much based on how far someone drives, but they do change based on where the driver lives (insurance in Miami is not insurance in rural Ohio). The variable portion is a per-mile rate that covers the operating costs that scale with distance: fuel, oil, tires, and routine maintenance.

FAVR requires a formal plan design that meets IRS rules (Rev. Proc. 2019-46), a minimum number of participating drivers (usually at least five), and more record-keeping than the standard mileage rate. It can be worth the effort for large companies with dozens of drivers across different regions, but for most small businesses the standard mileage rate is the simpler option.

IRS Mileage Reimbursement Rates: Historical Trends and State Rules

Because the IRS rate is federal, it applies the same way in every state for federal tax purposes. A few states publish separate rates for specific circumstances (for example, a lower rate when a state-owned vehicle was available and declined, or a different rate for private aircraft); however, all 50 states default to using the standard $0.725 mileage reimbursement rate for general business use.

What varies from state to state is whether businesses are legally required to reimburse employees for business driving, and what rate the state government uses to reimburse its own employees.

Only three states currently require private employers to reimburse employees for necessary business expenses, including mileage: California, Illinois, and Massachusetts. In those states, failure to reimburse can expose the business to wage claims. The other 47 states have no such mandate, though many employers reimburse anyway because it's expected, tax-advantaged, and helps with retention.

The IRS updates the business mileage rate annually to reflect changes in vehicle operating costs, primarily fuel prices, insurance, maintenance, and depreciation. Looking at the last several years shows how the number moves with the underlying economics:

Year	Business Rate (cents/mile)
2020	57.5
2021	56.0
2022 (Jan-Jun)	58.5
2022 (Jul-Dec)	62.5
2023	65.5
2024	67.0
2025	70.0
2026	72.5

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Tips for Creating an Effective Mileage Reimbursement Policy

A mileage reimbursement policy answers the questions employees are going to ask before they ask them, and creates a paper trail that holds up in an audit. A workable policy usually covers the following:

Who qualifies: Which roles or classifications are eligible for mileage reimbursement, and under what conditions? A sales team might be eligible for all client-site travel; an office worker attending a one-off training might be eligible only for that trip.
What counts as reimbursable mileage: Business travel between job sites, client meetings, off-site errands, and airport runs typically qualify. The daily commute to a primary work location does not. If someone works from home most days and drives to the office occasionally, the policy needs to state if that trip counts (it usually doesn't).
Mileage reimbursement rate: Most policies reimburse at the current IRS standard mileage rate, updating automatically when the IRS publishes a new figure each year. Even if your business uses expense records or FAVR to calculate reimbursements, the current rate should still be stated.
Documentation requirements: The IRS expects a contemporaneous log showing date, purpose, starting and ending odometer readings (or total miles), and destination. A policy should specify how employees track and submit this (an app, an expense-report template, or a form), and how often submissions are due.
Approval and payment timing: Who approves the reimbursement request, how long approval takes, and when the money is expected to hit the employee's account after a request.
Non-reimbursable items: Parking tickets, moving violations, personal errands during a business trip, and (usually) tolls and parking are generally exempt, unless the policy handles those separately.
Accountable plan language: To keep reimbursements non-taxable, the policy should meet the three IRS accountable-plan requirements: expenses have a business connection, are substantiated within a reasonable time, and any excess advance is returned.

Slash's corporate cards can capture card-based travel expenses in real time and prompt your employees to submit receipts and memos tied to each expense. Or, if your employees pay out of pocket, they can submit an expense report through their Slash dashboard, where it'll be routed to the correct approver for travel-related expenses. Later on, you can pull all your transaction data, categorize it, match receipts, and then sync it with your accounting software, cutting down the manual work that mileage and travel policies usually create at month-end.

Understanding Reimbursement Tax Deductions

For a business, mileage reimbursement paid to an employee (or contractor) at or below the IRS standard rate is fully deductible as a business expense. The business books it as part of travel or automobile expense, and the employee receives the payment tax-free, provided it's paid under an accountable plan with proper substantiation. In effect, it functions like a tax deduction from the employer's perspective, without adding income to the employee.

If the business reimburses at a rate higher than the IRS standard, the excess is treated as taxable wages to the employee. That means payroll tax withholding on the excess, W-2 reporting, and the employee owes income tax on the difference. Most businesses that don't have a specific reason to go higher just track the IRS rate to avoid this complication.

For self-employed drivers, the deduction is claimed directly on Schedule C. The business owner totals up documented business miles for the year, multiplies by the IRS rate, and deducts that amount from gross income. They can't also deduct fuel, maintenance, insurance, or depreciation separately when using the standard rate; those costs are considered baked into the per-mile figure.

For a full breakdown of how to deduct vehicle depreciation and other expenses, read our guide on deductible business expenses, including when a vehicle expense deduction using actual costs may be appropriate.

Make the Right Financial Move with Slash

Slash is a business banking platform that can make it easier to track employee expenses, manage expense reports, send out reimbursements, and keep everything aligned with your ledger. The Slash Visa Platinum Card uploads expense records and receipts to your dashboard; from there, you can properly categorize each transaction, match it to the right project or entity, and export the data straight into your accounting system. Slash Cards can earn up to 2% cash back on eligible expenses, too, meaning when your employees spend at the pump you get more back to your bottom line.

Beyond mileage management, Slash can simplify the full scope of your everyday finances. You get virtual accounts that can segment funds by purpose. Want to set a budget for your employee's travel expenses, or set aside cash for quarterly taxes? Throw the funds in a virtual account and track every expense against it. With Twin, Slash's AI financial assistant, you can ask for the kind of financial analysis you'd otherwise need an advisor or accountant for; Twin pulls from your actual transaction data to answer questions about spend patterns, categories, and cash-flow trends.

Here's what else you get with Slash:

Slash Visa Platinum Card: Corporate charge cards that can earn up to 2% cash back with granular spend controls, spend limits, and card grouping
Business banking: FDIC-insured business checking, protected up to $150M through Column N.A.'s insured cash sweep network²
Diverse payment methods: Multi-rail payments including same-day ACH, wires via SWIFT to 180+ countries, RTP, FedNow, and stablecoin transfers in USDC or USDT.⁴
Integrated treasury: High-yield treasury accounts backed by Morgan Stanley and BlackRock money market funds, with no minimum balance to get started.⁶
Flexible financing: Access line of credit financing with repayment timelines ranging from 30 to 90 days depending on your cash flow cycle. Make drawdowns and payments directly from your dashboard.⁵
Accounting integrations: Two-way sync with QuickBooks, Xero, NetSuite, and Sage Intacct.

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Frequently asked questions

What is the 2026 IRS mileage reimbursement rate?

The 2026 IRS standard mileage rate for business use is 72.5 cents per mile, up 2.5 cents from the 2025 rate of 70 cents. The rate is set once a year and covers the estimated cost of fuel, maintenance, insurance, and depreciation on the average vehicle used for business purposes.

What's the difference between a reimbursement and deduction?

A reimbursement is a payment from a business to an employee or contractor who drove for business reasons, meant to cover the cost of using their personal vehicle. A deduction is a reduction of taxable income on a tax return, claimed by a business owner or self-employed driver on Schedule C for their own business mileage. The same 72.5-cent rate can apply to both, but the mechanics and paperwork are different.

Are employers required to reimburse employees for mileage?

Federal law does not require private employers to reimburse mileage. Three states (California, Illinois, and Massachusetts) require reimbursement for necessary business expenses, which typically includes business driving. In other states, reimbursement is optional but common, both because it's expected competitively and because it can be structured as tax-free to the employee.

Does the mileage reimbursement rate change for different states?

No. Although some states do have specific wage claim laws, meaning reimbursements are required by private employers, no states diverge from the standard $0.725 mileage reimbursement rate set by the IRS in 2026.