Corporate mileage reimbursement policy: a complete guide for employers

When employees use their own cars, vans, motorcycles or bikes for work, a clear corporate mileage reimbursement policy helps ensure they are paid fairly and that your business handles expenses consistently.

Mileage reimbursement can support employees with the cost of using a personal vehicle for business journeys while helping employers manage tax treatment, approvals and record-keeping. It is not simply a payment for fuel: a well-designed mileage rate can account for the wider cost of running a vehicle, including maintenance, insurance, depreciation and wear and tear.

This guide explains how mileage reimbursement works, how to set and administer a policy, when to consider a car allowance, and how to handle electric vehicles.

What is corporate mileage reimbursement?

Corporate mileage reimbursement is a payment made to an employee or contractor who uses their personal vehicle for eligible business travel.

Rather than asking employees to submit receipts for petrol, repairs, insurance and other individual motoring costs, employers commonly pay a set amount for each business mile travelled. This simplifies claims while recognising that every business journey contributes to the overall cost of owning and operating a vehicle.

Mileage reimbursement may apply when an employee uses a personal:

• Car or van

• Motorcycle

• Bicycle

• Electric vehicle

• Other privately owned vehicle approved under the company policy

A personal vehicle is usually one registered to, leased by or otherwise made available to the individual making the claim. It does not normally include a company car, rental car or hired vehicle, which may follow separate expense rules.

Which journeys qualify for mileage reimbursement?

A reimbursable journey must have a genuine business purpose. In practical terms, that usually means travel undertaken as part of an employee’s work duties rather than ordinary commuting.

Eligible business journeys can include:

• Travelling to visit a client or prospective client

• Attending an off-site meeting, conference or training event

• Travelling between work sites

• Visiting another office, employee or manager

• Collecting business supplies or equipment

• Running an errand on behalf of the business

• Travelling to a supplier, contractor or partner meeting

In the US, the IRS describes qualifying business expenses as both “ordinary” and “necessary”: common and accepted in the trade or business, and helpful or appropriate for the organisation. This is a useful principle for employers in any location when defining eligible mileage.

Commuting is not normally reimbursable

The regular journey between an employee’s home and their usual workplace is generally considered commuting, not business travel. It should therefore be excluded from a mileage claim unless a specific exception applies under local tax rules or the employee’s contract.

For example, if an employee drives 50 miles each way to a conference but normally commutes 10 miles each way to their usual workplace, the normal 20-mile round-trip commute should be deducted. The employee could claim 80 business miles rather than the full 100 miles.

Similarly, adding a quick business errand to an otherwise personal journey does not automatically make the entire trip claimable. The journey must be primarily for business.

How mileage reimbursement is calculated

The basic calculation is straightforward:

Eligible business miles × approved mileage rate = reimbursement amount

For example, an employee who drives 1,000 eligible business miles at a rate of 45p per mile would receive:

1,000 × £0.45 = £450

The complexity comes from choosing the right rate, applying the relevant tax rules and distinguishing between personal vehicles and company-owned vehicles.

What does a mileage rate cover?

Mileage rates are designed to cover more than fuel. The total cost of owning and operating a vehicle can include:

• Petrol, diesel or electricity

• Vehicle insurance

• Vehicle Excise Duty and other taxes

• Maintenance and repairs

• Tyres and routine servicing

• Depreciation

• Wear and tear

• Finance or leasing-related costs, where applicable

This is why a standard mileage rate may be noticeably higher than the cost of fuel alone. Each business journey contributes to a vehicle’s running costs and reduces its long-term value.

Mileage reimbursement rates in the UK

For employees using their own cars or vans for business travel, HMRC’s Approved Mileage Allowance Payments (AMAP) are commonly used as the benchmark.

The current long-standing AMAP rates are:

The 5p passenger supplement is available where the passenger is also an employee or company officer and is travelling for business purposes.

An employer can choose to pay less than the HMRC-approved amount. In that case, the employee may be able to claim tax relief on the difference through Mileage Allowance Relief, subject to the relevant conditions.

Employers can also pay more than the approved rate, but the excess may be treated as taxable earnings. For that reason, businesses should confirm the tax and payroll treatment before setting rates above HMRC’s approved level.

For calculations based on current UK rates, use the mileage reimbursement calculator.

Personal vehicles versus company cars

It is important not to confuse the rates for an employee’s own vehicle with the rates for a company car.

When an employee uses their own car, the AMAP rate is intended to cover the full cost of running the vehicle, including fuel and wear and tear.

When an employee uses a company car, employers may instead use HMRC’s advisory fuel rates or advisory electricity rate to reimburse business fuel or electricity costs. These rates are reviewed periodically and vary by fuel type, engine size and vehicle type. Employers should always check the latest HMRC advisory fuel rates before processing claims.

Mileage reimbursement for electric cars

Employees can claim business mileage when they use an electric vehicle. The correct treatment depends primarily on whether the electric car is privately owned or provided by the company.

Employees using their own electric cars

For a privately owned electric car, the UK AMAP rates are the same as for petrol and diesel cars:

• 45p per mile for the first 10,000 business miles in the tax year

• 25p per mile for additional business miles

• 5p per mile for each eligible business passenger

The rationale is that the approved rate covers the total cost of vehicle ownership, not just the cost of electricity. Although charging may be cheaper than refuelling a petrol or diesel vehicle, electric car owners still face costs such as insurance, servicing, tyres, depreciation and repairs.

Employees using electric company cars

For fully electric company cars, businesses may use HMRC’s advisory electricity rate to reimburse employees for electricity used on business travel. This is separate from AMAP and should not be applied to an employee’s privately owned electric vehicle.

The advisory electricity rate has changed over time—for example, it was 5p per mile in earlier guidance—so employers should refer to the latest HMRC rate rather than using a historic figure in their policy.

Creating an electric vehicle policy

A corporate mileage reimbursement policy should state clearly whether the company:

• Uses the standard AMAP rate for all personal vehicles, including electric cars

• Uses HMRC advisory fuel or electricity rates for company vehicles

• Reimburses public charging costs separately in certain circumstances

• Requires receipts for charging claims that fall outside the standard mileage process

• Provides a flat allowance or a per-mile reimbursement for employees with company electric vehicles

Keeping the rules simple is usually the best approach. A single approved process reduces employee confusion and prevents inconsistent treatment between petrol, diesel, hybrid and electric vehicles.

Does an employer have to pay mileage?

In the UK, employers are not generally required to reimburse mileage simply because an employee uses their own vehicle for work. However, failing to reimburse necessary work-related travel can affect employee retention, morale and the perceived fairness of your benefits package.

Where employees are expected to use their own cars regularly to perform their role, a mileage reimbursement policy or car allowance should be addressed in the employment contract or a related policy document.

In the US, employers are not generally required by federal law to reimburse mileage unless failing to do so would reduce an employee’s effective pay below minimum wage. Some states, including California and Massachusetts, have additional expense-reimbursement requirements.

Even where reimbursement is not legally mandatory, covering legitimate business mileage is widely seen as good employment practice.

Does mileage reimbursement need to go through payroll?

Tax treatment depends on the amount paid, the type of vehicle and the applicable national rules.

In the UK, payments made within HMRC’s approved mileage allowance limits can generally be made without tax or National Insurance deductions. Payments above the approved level may be taxable.

In the US, employers generally need an accountable plan to reimburse mileage and other business expenses on a non-taxable basis. An accountable plan requires employees to substantiate expenses properly and return any excess reimbursement. Without one, mileage payments may be treated as taxable wages.

Because payroll requirements vary by location and can change, employers should confirm the relevant treatment with their payroll provider, accountant or tax adviser.

What records should employees keep?

Good record-keeping is essential. A mileage claim should be supported by a mileage log that documents each journey at or near the time it takes place.

A complete log should include:

• Date of travel

• Start and end location

• Number of business miles travelled

• Purpose of the journey

• Vehicle used

• Odometer readings, where required or useful

• Names of business passengers, where a passenger supplement is claimed

For example:

A standard claim form or digital expense tool can make this process easier and ensure that finance teams receive all the information needed to approve the payment.

How to create an effective mileage reimbursement policy

A mileage policy should be easy for employees to understand and simple for finance teams to administer. It should remove doubt about what employees can claim, how much they can claim and when they will be reimbursed.

1. Define the purpose and scope

Start by explaining why the policy exists and who it applies to. State that it covers employees using approved personal vehicles for eligible business travel.

Define relevant terms, including:

• Business mileage

• Personal vehicle

• Company vehicle

• Ordinary commuting

• Business passenger

• Mileage allowance

• Car allowance

This is also the right place to state whether contractors, temporary workers or subcontractors are covered.

2. Explain what counts as business travel

Set out the types of journeys that can be claimed and those that cannot.

Your policy might permit claims for:

• Client visits

• Meetings with prospective customers

• Supplier meetings

• Travel between offices or work sites

• Travel to purchase essential supplies

• Travel to a conference, training event or off-site meeting

It should exclude or restrict:

• Normal commuting

• Personal detours

• Parking fines and traffic penalties

• Unauthorised travel

• Journeys without a business purpose

Clear examples make the rules easier to follow than general statements alone.

3. Set the rates and explain what they cover

State the rate payable for each eligible vehicle type and make clear whether it follows HMRC AMAP rates or a company-set rate.

Explain whether the rate includes fuel, charging, maintenance, insurance, depreciation and other running costs. Also explain how parking, tolls, congestion charges and other travel costs should be submitted.

If your business pays less than the approved rate, tell employees that they may be able to claim tax relief on the difference. If you pay above the approved rate, explain the potential payroll and tax implications.

4. Define the claim and approval process

Employees should know exactly how and when to submit claims. Your policy should cover:

• The mileage log information required

• The deadline for submitting a claim

• The system or form employees must use

• Who approves claims

• When approved claims are paid

• How employees should correct mistakes or submit late claims

A consistent process is particularly important for businesses with frequent travellers or teams operating across multiple locations.

5. Include safety and insurance requirements

If employees drive for work, the policy should require them to:

• Hold a valid driving licence

• Maintain roadworthy vehicles

• Have appropriate insurance for business use

• Follow road traffic laws

• Avoid driving when tired, unfit or impaired

• Report any accidents or incidents that occur during business travel

Mileage reimbursement should never create an incentive for employees to drive when another travel option would be safer or more appropriate.

6. Review the policy regularly

Mileage rates, tax rules, vehicle technology and employee travel patterns can all change. Review the policy at least annually and whenever HMRC updates relevant guidance.

For a ready-made framework, download the mileage and car allowance policy template.

Car allowance versus mileage reimbursement

A car allowance is different from mileage reimbursement.

A car allowance is a fixed amount of money added to an employee’s salary, often paid monthly or annually, to help them buy, lease or run a vehicle. It is usually treated as taxable income.

Mileage reimbursement is a payment for actual business miles travelled. It is based on recorded journeys and may be paid in addition to a car allowance when an employee uses their personal vehicle for work.

What does a car allowance cover?

A car allowance may help employees meet the broader cost of having a vehicle available for work, including:

• Vehicle purchase or lease costs

• Insurance

• Vehicle tax

• Fuel or electricity

• Maintenance and servicing

• Tyres and repairs

• Depreciation

• General wear and tear

The employee usually sources and owns or leases the vehicle themselves. This gives them more choice than a company car scheme, but it also means they take greater responsibility for maintaining the vehicle.

How much should a car allowance be?

There is no universal car allowance amount. The appropriate level depends on the employee’s role, expected business travel, location, vehicle requirements and local costs.

Historic UK survey figures cited average annual allowances of approximately:

• £10,300 for directors and executives

• £8,200 for senior managers

• £5,200 for sales representatives

• £4,600 for professional roles

These figures should be treated as broad market context rather than a recommended rate. Employers should calculate an allowance based on the actual requirements of the role and review it regularly.

In the US, one historical benchmark placed the average monthly car allowance at around $575 before tax. As with UK figures, this can vary significantly by job level, location and travel demand.

How to calculate a car allowance

To calculate a realistic allowance, estimate the annual cost of making a suitable vehicle available for the role.

Consider:

1. Fuel or electricity costs
   Estimate expected business and personal mileage, fuel efficiency or electricity consumption, and local fuel or charging prices. Tools such as FuelEconomy can help estimate trip fuel costs.

2. Maintenance and repairs
   Include servicing, MOT costs, tyres, oil changes, brake pads and likely repairs. Services such as AAA repair estimates can provide indicative repair costs.

3. Insurance
   Employees may need insurance that permits business use. Prices can vary based on the driver, location, vehicle and expected annual mileage. Comparison services such as CarInsurance.com illustrate how widely costs can differ.

4. Depreciation and finance costs
   Newer vehicles may depreciate quickly, while leasing arrangements can have different monthly costs and insurance requirements. A depreciation calculator can help model expected value loss over time.

5. Role-specific requirements
   A sales employee covering a large territory may need a higher allowance than an employee who only makes occasional local journeys.

The allowance and the conditions for receiving it should be documented in the employment contract or a formal policy.

Company car or car allowance: which is better?

The right option depends on your business needs, budget and workforce.

Company cars

With a company car, the employer usually selects, owns or leases the vehicle and takes responsibility for fleet administration, maintenance and replacement.

A company car may suit organisations that:

• Need consistent branding or vehicle standards

• Require specialist vehicles

• Have employees who drive extensively for work

• Want greater control over vehicle safety and emissions

• Operate a dedicated fleet

However, company cars can involve administrative work, benefit-in-kind tax considerations and the challenge of reallocating or selling vehicles when an employee leaves.

Car allowances

With a car allowance, the employee generally chooses and manages their own vehicle. The employer avoids much of the fleet administration and does not need to own, lease, maintain or dispose of the car.

A car allowance may suit businesses that:

• Have employees with varied vehicle needs

• Want a straightforward cash benefit

• Do not need to maintain a fleet

• Have employees who use their vehicles for both business and personal travel

The trade-off is that a fixed allowance may not reflect every employee’s actual costs or business mileage. Employees who travel very different distances may perceive a single allowance as unfair.

Pros and cons of car allowances

Advantages of a car allowance

• Straightforward to set up and administer

• Gives employees flexibility in choosing their vehicle

• Reduces fleet-management responsibilities

• Can be added as a regular salary payment

• Helps employees keep a vehicle available for work

• May be more practical for employees who combine personal and business use

Disadvantages of a car allowance

• Usually taxable as income

• May not reflect actual business mileage or local vehicle costs

• Can be difficult to set fairly across different roles

• Does not replace the need for mileage reimbursement where employees travel extensively for work

• Gives employers less control over vehicle standards, maintenance and suitability

• May be unnecessary for employees who rarely need a car for their role

Mileage reimbursement for contractors and self-employed workers

Independent contractors and self-employed people may also be able to claim the cost of eligible business journeys.

Typical qualifying journeys can include:

• Travelling from a workplace to a job site

• Travelling between different work sites

• Meeting clients

• Attending meetings away from the usual workplace

• Collecting supplies or equipment

• Returning to a workplace after an eligible business trip

The same fundamental rule applies: the journey must be for business rather than personal travel or ordinary commuting.

Self-employed taxpayers can generally calculate vehicle expenses using an approved mileage method or by working out the business proportion of their actual vehicle costs, such as fuel, repairs and maintenance. The most suitable method depends on the relevant tax rules and how the vehicle is used.

Mileage reimbursement in the US and other countries

Mileage rules vary widely between countries. Employers with international teams should avoid applying one country’s tax treatment everywhere.

In the US, the IRS publishes a standard business mileage rate each year. The rate was 67 cents per mile for business driving in 2024, but employers should always check the current IRS guidance before using a rate in a policy.

Some US organisations use a Fixed and Variable Rate Reimbursement plan, often called FAVR. This approach combines a fixed payment for ownership costs with a variable per-mile reimbursement based on local operating costs. It can provide a more tailored alternative to a single national rate, especially for teams spread across regions with very different fuel, insurance and vehicle costs.

Across Europe, tax-free allowances also differ by country. Some use a single mileage rate, while others adjust rates according to vehicle type, engine size, distance travelled or local tax rules. Employers operating internationally should maintain country-specific guidance and seek local tax advice where needed.

Frequently asked questions

Is car allowance taxable?

In the UK, a car allowance is usually treated as taxable income because it is a cash payment added to salary. Income tax and National Insurance may apply.

Mileage reimbursement for eligible business travel can be treated differently when paid within HMRC’s approved limits.

Can an employee receive a car allowance and mileage reimbursement?

Yes. A car allowance helps an employee keep a vehicle available, while mileage reimbursement compensates them for actual business travel. Whether both are appropriate depends on the employment arrangement and how much business driving the role requires.

Can an employer remove a car allowance?

It depends on the employee’s contract and the terms of the car allowance policy. If the allowance is contractual, removing it may require consultation and agreement. Employers should clearly state when the allowance can be changed, suspended or withdrawn.

Can employees claim mileage for electric cars?

Yes. Employees using their own electric cars for business travel can claim mileage under the same HMRC AMAP rules that apply to petrol and diesel cars. Different rules apply to electric company cars, where the advisory electricity rate may be relevant.

Should parking and tolls be included in the mileage rate?

The mileage rate is intended to cover the cost of operating the vehicle. Parking, tolls and congestion charges are often treated as separate travel expenses, but your policy should state whether these costs are reimbursable and what evidence employees need to provide.

How often should employees submit mileage claims?

Monthly submission is common because it helps employees receive reimbursement promptly and makes it easier for finance teams to review claims. Businesses with lower travel volumes may choose quarterly claims instead.

A well-written mileage reimbursement policy gives employees confidence that they will be paid fairly, gives finance teams a consistent approval process and helps the business manage travel costs responsibly. Combined with clear car allowance, company vehicle and electric vehicle rules, it can become an essential part of a wider corporate travel policy and expense-management process.