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Missouri does not generally set a mileage reimbursement rate that private employers have to pay. That gives employers flexibility in how they reimburse employees who use personal vehicles for work.
Many businesses use the IRS standard mileage rate as a benchmark. In 2026, there is an extra detail to keep track of because the IRS changed its business mileage rate halfway through the year.
The 2026 IRS business mileage rate is 72.5 cents per mile for January 1 through June 30, 2026, and 76 cents per mile for July 1 through December 31, 2026.
The IRS standard mileage rate is optional and does not create a Missouri reimbursement requirement.
Here is what Missouri employers and drivers should know about mileage reimbursement, taxes, business mileage, and state-specific rules in 2026.
What Is the Missouri Mileage Reimbursement Rate for 2026?
There is no single Missouri mileage reimbursement rate for private employers.
Employers that choose to reimburse employees for business mileage can use the federal IRS rate as a benchmark. The applicable 2026 business rates are:
- January 1 through June 30, 2026: 72.5 cents per mile
- July 1 through December 31, 2026: 76 cents per mile
The IRS initially set the business rate at 72.5 cents per mile for 2026. It later raised the rate to 76 cents per mile beginning July 1 following increases in fuel prices.
The rate applies to eligible business use of cars, vans, pickups, and panel trucks. It provides a straightforward benchmark for employers using a Cents-Per-Mile (CPM) reimbursement program.
Employers are not required to use the IRS rate as their reimbursement rate.
Depending on how their employees drive, companies can also use Fixed and Variable Rate (FAVR), Tax-Free Car Allowance (TFCA), or a mixed reimbursement approach.
Do Employers Have to Reimburse Mileage in Missouri?
Missouri does not generally require private employers to reimburse employees at a specific mileage rate.
Employers therefore have flexibility to choose how they reimburse employees who use personal vehicles for business.
An employer may still have reimbursement obligations under an employment agreement, collective bargaining agreement, company policy, or other applicable law.
Employers with drivers in multiple states should also account for differences in state expense reimbursement requirements.
For Missouri employers that choose to reimburse business driving, the IRS standard mileage rate can serve as a benchmark, but it is not the only option.
Companies can use CPM, FAVR, TFCA or a mixed approach depending on their workforce and driving patterns.
Whatever method an employer uses, a clear mileage reimbursement policy should define which trips qualify as business mileage, what employees need to document, how reimbursement is calculated, and when payments are made.
Is Mileage Reimbursement Tax-Free in Missouri?
Mileage reimbursements can generally be excluded from taxable wages when they meet federal accountable-plan requirements.
Under IRS Publication 463, Travel, Gift, and Car Expenses, an accountable plan generally requires three things: the expense must have a business connection, the employee must adequately account for the expense within a reasonable period, and the employee must return any excess reimbursement within a reasonable period.
Mileage records should document details such as the date, destination, mileage, and business purpose of a trip.
Simply paying the IRS mileage rate does not automatically make a reimbursement tax-free. The reimbursement arrangement and supporting records also matter.
For a CPM allowance paid under an accountable plan, reimbursement up to the applicable federal mileage rate can generally be excluded from taxable wages when IRS requirements are satisfied.
Amounts above the applicable federal rate are generally taxable to the extent of the excess.
The Missouri Department of Labor similarly explains that business expenses paid under an accountable plan are not reportable as wages when they do not exceed applicable federal rates, while amounts above those rates are reportable and taxable.
FAVR works differently.
A properly structured Fixed and Variable Rate (FAVR) program follows its own IRS requirements and is not simply tested against the standard mileage rate on a mile-for-mile basis.
What Counts as Business Mileage in Missouri?
Business mileage generally means driving for a legitimate work purpose in an employee’s personal vehicle.
For example, driving from an office to meet a customer, traveling between work locations during the day, making service calls, or visiting job sites can generally qualify as business transportation.
Regular commuting works differently. Driving from home to a regular workplace is generally considered personal commuting, even when the commute is long.
IRS Publication 463 also provides specific rules for temporary work locations, multiple workplaces, and qualifying home offices.
Consider an employee who drives from home to their regular office in St. Louis, then drives from the office to visit a customer.
The first trip is generally commuting. The second is generally business transportation.
Accurate mileage records help employers make these distinctions consistently and provide documentation to support tax-free reimbursement.
What Is the Missouri State Employee Mileage Rate for 2026?
Missouri state employees follow a separate travel policy, and the rates should not be confused with private-sector reimbursement rules.
The Missouri Office of Administration publishes three figures: the IRS rate, the state’s standard reimbursement rate, and a lower state fleet rate.
For January 1 through June 30, 2026, the published figures are:
- IRS rate: 72.5 cents per mile
- Missouri standard state rate: 70 cents per mile
- State fleet rate: 36 cents per mile
For July 1, 2026 through June 30, 2027, Missouri lists:
- IRS rate: 76 cents per mile
- Missouri standard state rate: 70 cents per mile
- State fleet rate: 36 cents per mile
Missouri’s travel rules also affect which rate an employee can receive.
When a state vehicle is available and an employee chooses to drive a privately owned vehicle instead, reimbursement is limited to the state fleet rate.
If a state vehicle is unavailable but a rental vehicle is a reasonably available, lower-cost option, reimbursement can also be limited based on the cost of that option.
Missouri describes the fleet rate as reflecting the average cost of operating a mid-size sedan in the state vehicle fleet.
These rules apply to Missouri state travel. They do not establish a mileage reimbursement rate for private employers.
What Are Missouri’s Workers’ Compensation Travel Reimbursement Rules?
Missouri has separate rules for certain travel associated with workers’ compensation medical treatment.
The Missouri Department of Labor and Industrial Relations explains that when an injured employee is required to travel outside the local or metropolitan area of their principal place of employment for treatment, the employer must cover necessary and reasonable expenses.
There are limits. The employer or insurer is not required to cover transportation costs for more than 250 miles each way from the place of treatment.
Separate rules apply when an injured worker lives outside Missouri.
Workers’ compensation travel is a specific situation, so employers should keep these rules separate from their regular employee mileage reimbursement policy.
What Is the Average Car Allowance in Missouri?
There is no official Missouri average car allowance or state-set allowance amount for private employers.
A traditional car allowance is usually a fixed amount paid to an employee for using a personal vehicle for work.
While simple to administer, a flat allowance may not reflect how vehicle costs change with mileage, location, or job requirements.
Tax treatment also depends on how the arrangement is structured. IRS guidance distinguishes between accountable and nonaccountable plans.
Payments under a nonaccountable plan are generally treated as wages, while qualifying reimbursements under an accountable plan can be excluded from wages.
Employers looking for a tax-efficient alternative can consider a Tax Free Car Allowance (TFCA), which reimburses employees for the real, business-required cost of owning and operating a personal vehicle for work when properly structured.
Which Mileage Reimbursement Program Works for Missouri Employers?
The right reimbursement method depends on how employees drive, where they are located, and what their jobs require.
Cents-Per-Mile (CPM) reimburses employees for the real, business-required cost of owning and operating a personal vehicle for work using a set rate for each substantiated business mile. It can be a practical choice for employees who drive occasionally or have lower business mileage.
Fixed and Variable Rate (FAVR) separates fixed and variable vehicle costs. Fixed costs can include insurance, depreciation, license, and registration, while variable costs can include fuel, maintenance, tires, and oil. This structure can account for differences in business mileage and local vehicle costs.
Tax-Free Car Allowance (TFCA) can use fixed, mileage-based, or combined reimbursement components to reimburse the real, business-required costs employees incur when using personal vehicles for work.
Companies with different driver groups can also use a mixed approach. A business might use FAVR for regular high-mileage drivers and CPM for employees who drive less frequently.
Managing Mileage Reimbursement in Missouri
Missouri employers have flexibility in how they design mileage reimbursement programs.
That makes a clear reimbursement structure and reliable mileage records important for keeping the program easy to manage and supporting appropriate tax treatment.
A well-designed program gives drivers a clear way to capture business mileage, helps administrators understand what they are paying for, and provides the records needed to manage reimbursement consistently.
Cardata helps businesses design and manage vehicle reimbursement programs for employees who use personal vehicles for work.
Our fully managed programs bring together mileage capture, reimbursement calculations, payments, reporting, and compliance support, giving Finance, HR, and Operations teams a clearer way to manage driving for work.
Reach out to Cardata to build a mileage reimbursement program built around your drivers, business needs, and budget.
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