Many employers use the IRS business mileage rate because it is familiar, simple, and easy to apply. However, the IRS mileage rate is a national benchmark. It may not accurately reimburse every employee who uses a personal vehicle for work.
The rate can overpay some high-mileage drivers, underpay some low-mileage drivers, and miss important differences in location, vehicle costs, insurance, depreciation, fuel, maintenance, taxes, and registration.
Quick Answer: Why Can the IRS Mileage Rate Incorrectly Reimburse Workers?
The IRS mileage rate can incorrectly reimburse workers because it applies one national cents-per-mile rate to employees with different mileage levels, vehicle costs, territories, and locations.
A single mileage rate may overpay high-mileage employees whose fixed costs are spread across many miles and underpay low-mileage employees who still have insurance, depreciation, registration, taxes, and other fixed vehicle costs. Employers should review whether the IRS mileage rate fits their workforce or whether a more customized reimbursement method is needed.
For 2026, the IRS business mileage rate is:
These rates are useful benchmarks, but they are not automatically the best reimbursement method for every workforce. Employers should review whether one national rate accurately reflects employee mileage levels, locations, fixed costs, and variable operating costs.
The IRS mileage rate may work well when employees drive similar mileage levels, work in similar cost regions, and have vehicle costs close to national assumptions.
It may work less well when employees cover different territories, drive very different mileage levels, or face different fuel, insurance, maintenance, depreciation, registration, tax, and repair costs.
Employers should compare the IRS rate against actual workforce mileage, employee location, vehicle-cost assumptions, and state reimbursement requirements before deciding whether it is the right method.
The IRS standard mileage rate is based on national vehicle-cost assumptions. It is designed to provide a simplified cents-per-mile amount for business use, but it does not personalize reimbursement for each employee’s territory, mileage level, or vehicle-cost profile.
That simplicity is helpful, but it can also create reimbursement gaps. Employees in different regions may face different fuel, insurance, maintenance, repair, registration, tax, and depreciation costs. Employees also drive different numbers of business miles, which affects how fixed costs are recovered.
The IRS mileage rate is reliable as a national benchmark, but it is less reliable as a personalized employee reimbursement method. It does not adjust for each employee’s location, mileage level, vehicle type, territory size, or fixed-cost profile.
Even when the IRS updates the rate, a national cents-per-mile amount may still overpay some employees and underpay others. Low-mileage drivers may struggle to recover the business-use portion of fixed costs, while high-mileage drivers may receive more than needed for those same fixed costs.
Fuel, insurance, registration, taxes, maintenance, and repair costs can vary significantly by region. A national mileage rate may be too high for some employees and too low for others.
Fixed costs such as insurance, depreciation, registration, taxes, and license fees exist even when employees drive fewer business miles. Low-mileage drivers may not receive enough mileage reimbursement to cover the business-use portion of those fixed costs, while high-mileage drivers may receive more than needed for fixed costs.
Fuel, insurance, maintenance, and repair costs can change throughout the year. A standard mileage rate is simple, but it may not adjust quickly enough to reflect every employee’s actual experience.
The best alternative depends on the workforce. Some employers may use a company-set mileage rate, actual expense reimbursement, or a structured accountable reimbursement method.
For employers with frequent drivers, multiple territories, or different mileage levels, FAVR may be a better fit. FAVR, or Fixed and Variable Rate reimbursement, separates fixed vehicle costs from variable operating costs. It uses a standard vehicle, localized cost data, and documented business mileage to calculate reimbursement.
FAVR can generally support tax-free reimbursement when IRS requirements are met and business mileage is properly documented. However, it requires more structure than a simple cents-per-mile rate, including mileage tracking, policy administration, and reimbursement calculations.
FAVR, or Fixed and Variable Rate reimbursement, can help address gaps created by one national mileage rate because it separates fixed vehicle costs from variable operating costs.
Instead of standardizing only the reimbursement rate, FAVR uses a standard vehicle, localized cost data, and documented business mileage to calculate reimbursement. This can help low-mileage drivers recover fixed costs more accurately while reducing the risk of overpaying high-mileage drivers.
FAVR can generally support tax-free reimbursement when IRS requirements are met, business mileage is substantiated, and accountable-plan rules are satisfied. It requires more structure than a basic mileage rate, including mileage tracking, employee eligibility review, reimbursement calculations, and ongoing administration.
The IRS mileage rate can incorrectly reimburse workers because it applies one national rate to employees with different mileage levels, vehicle costs, locations, and territories.
It can. High-mileage employees may receive more than needed for fixed vehicle costs because those costs are spread across many business miles.
It can. Low-mileage employees may not receive enough reimbursement to cover the business-use portion of fixed costs such as insurance, depreciation, registration, taxes, and license fees.
For 2026, the IRS business mileage rate is 72.5 cents per mile for business miles driven January 1 through June 30 and 76 cents per mile for business miles driven July 1 through December 31.
No. The IRS mileage rate is a benchmark. Employers may choose another reasonable reimbursement method, but they should review tax treatment, substantiation, state reimbursement rules, and employee fairness.
FAVR may be better for employers with frequent drivers, multiple territories, or different mileage levels. It separates fixed and variable vehicle costs and can generally support tax-free reimbursement when IRS requirements are met.
Not sure whether the IRS mileage rate is accurately reimbursing your employees? mBurse can help you compare your current mileage reimbursement method against employee mileage, localized vehicle costs, fixed expenses, variable costs, and FAVR options.