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Mileage reimbursement is heading into 2027 after a year that showed just how quickly driving costs can change.
In 2026, rising fuel prices prompted the IRS to increase the business standard mileage rate midyear, from 72.5 cents to 76 cents per mile.
Meanwhile, employers continued to navigate changes in insurance, maintenance, vehicle ownership costs, and how much employees were driving for work.
For companies with employees using personal vehicles on the job, those shifts can affect both reimbursement and overall program spend. They also make it harder to plan around any single rate or cost assumption.
Heading into 2027, the focus is increasingly on flexibility: building vehicle programs that can respond as driving costs, employee mileage, roles, and workforce needs change.
Here are six trends we expect to shape mileage reimbursement in 2027.
1. Driving Costs Will Keep Moving at Different Speeds
The cost of driving is never really one number.
Fuel may get the most attention, but insurance, maintenance, depreciation, registration, and other vehicle expenses all affect what it costs an employee to use a personal vehicle for work.
Those expenses can also move in different directions and at different speeds.
In 2026, fuel prices shifted enough that the IRS made a rare midyear adjustment to the business standard mileage rate, increasing it from 72.5 cents to 76 cents per mile effective July 1.
That volatility is worth watching in 2027. Even if some vehicle costs stabilize, changes in fuel, maintenance, insurance, or other expenses can alter the economics of driving for work.
For employers, that makes flexibility increasingly important.
A reimbursement program should reflect the real, business-required costs employees take on when they drive for work and give organizations a practical way to respond as those costs change.
2. Reimbursement Will Become More Dynamic and Localized
The 2026 midyear mileage rate adjustment also highlighted a broader challenge for employers: driving costs can change quickly, and they do not change uniformly across the country.
A national mileage rate provides an important benchmark, but it cannot perfectly account for differences in geography, driving patterns, insurance, depreciation, maintenance, fuel, and other costs affecting individual drivers.
Even if fuel prices stabilize in 2027, employers are likely to continue dealing with vehicle costs that vary significantly by location and employee circumstances.
The more important trend, then, may not be the exact IRS mileage rate. It is the volatility behind it.
That volatility strengthens the case for reimbursement methodologies that can respond to local cost conditions and individual driving patterns rather than relying entirely on static national averages or flat allowances.
For employers with employees across multiple states, geography can be particularly important. Two drivers with similar business mileage can face different costs simply because they work in different parts of the country.
Geography can also affect reimbursement requirements. States such as California and Illinois have requirements related to reimbursing employees for certain necessary business expenses.
Heading into 2027, employers may put greater emphasis on reimbursement programs that account for where employees drive, what it costs them to operate a vehicle there, and how those costs change over time.
3. One-Size-Fits-All Vehicle Programs Will Become Less Common
Not every employee who drives for work has the same needs. As organizations take a closer look at vehicle costs and employee driving patterns, one-size-fits-all approaches may become less common.
Employers are increasingly recognizing that the right vehicle program can differ by employee population.
A service technician who needs specialized equipment may require a company vehicle, while a salesperson or other field employee may be better suited to using a personal vehicle with mileage reimbursement.
Personal vehicles used for work make up an organization’s grey fleet. Within that population, employers can also use a mix of reimbursement programs based on employees’ driving needs.
Fixed and Variable Rate (FAVR), Cents-Per-Mile (CPM), and Tax Free Car Allowance (TFCA) each reimburse employees for the real, business-required cost of owning and operating a personal vehicle for work, but they do so differently.
For example, CPM can be practical for employees with lower or less consistent business mileage, while FAVR may be better suited to drivers who regularly cover higher business mileage.
Other roles may have requirements that make a company-owned vehicle the more practical choice.
Rather than applying the same approach across an entire workforce, employers can evaluate the needs of different employee populations and match each group with a vehicle and reimbursement program that fits how they actually work.
Heading into 2027, that program-of-best-fit approach could become an increasingly important part of building a vehicle strategy that is fair, practical, and easier to defend.
4. Mileage, Role, and Geography Will Determine Program Fit
Choosing the right vehicle program requires context. How much an employee drives matters, but so do their job requirements and where that driving takes place.
Cardata’s 2026 Mileage Reimbursement Benchmark Report found that employees in the dataset spent more time on the road. Average monthly business mileage increased from 994 miles in 2025 to 1,061 miles in 2026, a 6.74% increase.
That difference adds up. If the gap between the 2025 and 2026 monthly averages continued over a full year, it would amount to roughly 800 additional business miles per driver.
Business mileage can shift as territories expand, customer visits increase, teams grow, or job responsibilities change.
As a result, employers may see reimbursement spend rise even when the reimbursement structure itself stays the same.
Job function adds important context.
A salesperson traveling between customer meetings can have different vehicle needs from a service technician carrying equipment or a healthcare employee visiting multiple locations.
Even employees who drive a similar number of miles may use their vehicles differently because of what their jobs require.
Geography matters as well. Fuel, insurance, maintenance, registration, and other costs vary by location, meaning employees with similar roles and mileage can still experience different costs.
Taken together, mileage, role, and geography can give employers a more complete picture of program fit.
For organizations using CPM, the connection between mileage and spend is especially direct. As reimbursable business mileage increases, reimbursement spend increases with it.
Employees with higher or more consistent mileage may warrant consideration for FAVR, while employees with lower or less frequent business mileage may remain well suited to CPM.
For Finance and HR teams planning for 2027, periodically reviewing these factors can help determine whether employees are still matched to programs that reflect how they actually drive for work.
5. Fleet and Reimbursement Will Be Evaluated Together
For many organizations, company vehicles and mileage reimbursement have traditionally been managed as separate programs.
But both are ultimately trying to answer the same question: What is the right way to support an employee who needs a vehicle for work?
In 2027, we expect more employers to evaluate fleet and reimbursement through a shared vehicle strategy.
Specialized equipment, branding requirements, vehicle specifications, or other operating needs may make a company vehicle the right fit for some employees.
For others, using a personal vehicle with an appropriate reimbursement program may be more practical.
Those needs can change over time. Territories shift, mileage increases or decreases, and job responsibilities evolve.
Rather than treating a company vehicle assignment or reimbursement method as a permanent decision, employers can periodically review whether it still reflects the employee’s role and driving needs.
Looking at fleet and reimbursement together can also give different teams a more complete view of work-related driving.
Finance can evaluate cost and budget impact. HR can consider fairness and employee experience.
Operations and fleet teams can assess practical vehicle requirements, safety, and how employees use vehicles in the field.
Bringing those perspectives together makes it easier to evaluate the full vehicle population rather than managing company vehicles, grey fleet drivers, and reimbursement programs in isolation.
Heading into 2027, the opportunity is not simply to reduce the number of company vehicles or move more employees to reimbursement.
It is to look at all work-related driving through the same lens and match employees with the vehicle program that best fits their needs.
6. Driver Safety Programs Will Become More Common
By 2027, reimbursing employees for using their personal vehicles for work may increasingly be only one part of managing a grey fleet.
As organizations become more aware of the risks associated with employees driving for work, formal driver safety and risk-management practices are likely to become more common alongside mileage reimbursement.
Depending on an organization’s needs and policies, that can include insurance verification, Motor Vehicle Record (MVR) monitoring, driver eligibility requirements, safety policies, and driver training.
For companies with employees regularly driving personal vehicles for work, these practices can provide greater visibility into who is driving on the organization’s behalf and whether employees continue to meet company requirements.
Insurance verification is one example.
Employers can establish minimum insurance requirements and regularly verify that drivers maintain the appropriate coverage while participating in a vehicle program.
The broader shift is that reimbursement and driver safety are increasingly being viewed as two parts of the same personal vehicle strategy.
For employers evaluating a mileage reimbursement program in 2027, that means looking beyond how mileage is captured and employees are paid.
It also means considering the policies and processes that help manage the risks that come with employees driving for work.
As these practices become more common, organizations without basic driver safety and risk-management processes may increasingly become the exception rather than the norm.
What Will the IRS Mileage Rate Be in 2027?
One question will get plenty of attention toward the end of the year: What will the IRS standard mileage rate be for 2027?
As of this writing, the IRS has not announced it.
The midyear change in 2026 is a good reminder that the standard mileage rate responds to underlying vehicle costs. It is also only one piece of an employer's overall vehicle strategy.
For companies using CPM, the IRS rate provides an important tax benchmark. FAVR and TFCA work differently and have their own structural and compliance considerations.
Whatever the IRS announces for 2027, employers should look beyond the headline number when evaluating their programs.
The volatility of driving costs, and how those costs differ across employees and locations, may ultimately matter more than the national rate itself.
The Bigger 2027 Trend: More Adaptable Vehicle Programs
Taken together, these trends point toward a more adaptable approach to managing driving for work.
Costs change. Employees move into new roles and territories. Mileage rises or falls.
Vehicle requirements evolve, and organizations need to manage the safety and risk associated with employees driving for work.
The right vehicle solution for a high-mileage field employee may look very different from what works for someone who only occasionally drives for work.
In 2027, we expect more employers to look across their entire vehicle program, including company vehicles, grey fleet drivers, different reimbursement methods, and driver safety practices, rather than managing each piece separately.
That means looking at mileage, geography, job requirements, vehicle needs, cost, and risk together, then making adjustments as the workforce changes.
For Finance, HR, Operations, and fleet teams, the goal is a vehicle program that remains fair for employees, practical to manage, and aligned with how people actually work.
Get Your Vehicle Program Ready for 2027
The start of a new year is a natural time to check whether your vehicle program still fits your workforce.
Look at which employees need company vehicles, which roles are better suited to personal vehicles and reimbursement, how driving patterns are changing, and whether employees are still matched to the right program.
Cardata helps companies design and manage mileage reimbursement programs around the real needs of their field teams.
From mileage capture and reimbursement calculations to payments, compliance support, reporting, and ongoing program management, we help make employee-owned vehicle programs easier to manage.
Read Cardata’s 2026 Mileage Reimbursement Benchmark Report for more context on the trends shaping reimbursement, or talk to Cardata about optimizing your vehicle program for 2027.
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