Fuel cards are one of the most effective tools a fleet manager has for controlling business fuel spend. They simplify purchasing, consolidate reporting and provide the transaction-level data that makes HMRC compliance far more straightforward.
But fuel cards come with a tax dimension that is often poorly understood, particularly when they are also used to pay for private fuel. When a business covers the cost of fuel that employees use for personal journeys, HMRC treats that as a taxable benefit known as the fuel benefit charge, or fuel card BIK (Benefit in Kind).
Understanding this charge matters now more than ever. The multiplier used to calculate it is rising year-on-year, the employer's National Insurance contribution on benefits increased in April 2025, and HMRC is preparing to move all benefit reporting into real-time payroll from April 2027. Getting this right and deciding whether providing private fuel still makes commercial sense are important parts of any well-run fleet strategy.
In this fuel card BIK guide, we'll explain:
What does the fuel card BIK mean?
How the fuel benefit charge works in the UK.
When tax applies.
How businesses can reduce unnecessary costs.
What is fuel card BIK?
BIK stands for Benefit in Kind. It is the term HMRC uses for non-cash perks provided by an employer, such as company cars, private healthcare, gym memberships, that have a taxable value. The employee pays income tax on the benefit, and the employer pays Class 1A National Insurance.
Fuel card BIK arises specifically when a business pays for fuel that an employee also uses for private journeys. The fuel card itself is not the issue; it is simply a payment mechanism. What creates the tax liability is private fuel being paid for by the employer and not fully repaid by the employee.
This applies whether the fuel card is linked to a specific driver, a specific vehicle, or a general company account. It also applies to any other arrangement where the business meets the cost of private fuel, including fuel purchased with a business credit card or reimbursed in cash.
This means the employee may need to pay:
Income tax on the benefit.
Additional company car tax.
Employers may also have National Insurance obligations linked to the benefit.
How the fuel benefit charge works
The fuel benefit charge for company cars is calculated using a fixed government multiplier rather than the actual cost of fuel consumed. HMRC multiplies a set figure by the same CO₂-based percentage used to calculate the employee's company car benefit in kind.
Fuel benefit charge = Multiplier × BIK percentage (based on CO₂ emissions)
The multiplier is set by HMRC each tax year and rises annually. The BIK percentage is the same CO₂-banded rate that determines the company car tax itself; a 30% BIK car produces a 30% fuel benefit too. The higher the vehicle's emissions, the higher the tax on any private fuel.
2025/26 and 2026/27 rates at a glance
Charge | 2025/26 | 2026/27 |
|---|---|---|
Car fuel benefit multiplier | £28,200 | £29,200 |
Van fuel benefit charge (flat rate) | £769 | £798 |
Van benefit charge (private use) | £4,020 | £4,170 |
Zero-emission van benefit charge | £0 | £0 |
Class 1A NIC rate (employer) | 15% | 15% |
Source: GOV.UK, Van benefit charge and fuel benefit charges for cars and vans for the tax year 2026 to 2027. Class 1A NIC increased from 13.8% to 15% from 6 April 2025.
One of the most misunderstood aspects of this charge is that it does not reflect the amount of private fuel the employee actually used. A driver who uses company fuel for 500 private miles a year is taxed on exactly the same cash equivalent as one who uses it for 10,000; the charge is either on or off. This is the feature that makes it financially damaging for low-mileage drivers.
The 'all or nothing' rule: the most important thing to understand
Section 151 of the Income Tax (Earnings and Pensions) Act 2003 contains what practitioners call the 'all or nothing' rule. The fuel benefit charge can only be eliminated if the employee 'makes good', or repays, the cost of all private fuel. Partial repayment gives no reduction whatsoever.
Example: An employee repays £400 toward their private fuel use during the year. Their employer-paid private fuel bill was £800. Because the repayment was not complete, the full fuel benefit charge still applies, as if the employee had repaid nothing.
This rule has significant practical consequences. If a business wants to continue providing fuel cards for private use but avoid the benefit charge, it must have a watertight system for tracking every private mile and ensuring full cost recovery, ideally before 6 July following the end of the tax year, which is HMRC's making-good deadline.
For most fleets, that level of administration costs more than the benefit is worth. It is one of the key reasons the number of employees receiving the fuel benefit has collapsed from around 240,000 in 2011-12 to just 40,000 in 2023-24, according to HMRC's own Benefit in Kind Statistics.
What the fuel benefit actually costs: an example
To make the numbers concrete, consider a typical mid-range company car, a Skoda Octavia 1.5 TSI 150PS, a popular choice across UK fleets. Its WLTP CO₂ figure of 129 g/km places it in the 31% BIK band for both 2025/26 and 2026/27.
2025/26 — Octavia 1.5 TSI, 31% BIK band
| Annual cost |
|---|---|
Fuel benefit cash equivalent (£28,200 × 31%) | £8,742 |
Employee income tax — basic rate (20%) | £1,748 / year (~£146/month) |
Employee income tax — higher rate (40%) | £3,497 / year (~£291/month) |
Employer Class 1A NIC (15%) | £1,311 / year |
2026/27: multiplier rises to £29,200, cash equivalent becomes £9,052. Higher-rate taxpayer pays £3,621; employer NIC rises to £1,358.
A higher-rate taxpayer on this car pays nearly £300 per month in extra income tax for the privilege of employer-paid private fuel. The employer pays over £1,300 in Class 1A NIC on top of the fuel cost itself. The total annual cost to employer and employee combined exceeds £4,800, before a single litre of private fuel is purchased.
The break-even calculation: when does private fuel actually pay off?
The question every fleet manager should ask is straightforward: how much private fuel would a driver need to use before the fuel benefit charge becomes worthwhile?
At the current UK average pump prices (May 2026), and assuming the Octavia's real-world efficiency of approximately 42 MPG, the cost per private mile is roughly 17p. To justify the £3,497 annual tax bill borne by a higher-rate taxpayer, the driver would need to cover approximately 20,600 private miles per year, every single year, just to break even.
Taxpayer rate | Annual tax on fuel benefit | Private miles needed to break even |
|---|---|---|
20% basic rate | £1,748 | ~10,300 miles |
40% higher rate | £3,497 | ~20,600 miles |
Based on petrol at 157p/litre, real-world 42 MPG. 2025/26 figures. Break-even rises further in 2026/27 as the multiplier increases.
For context, the average UK car covers around 7,400 miles per year total. Even drivers who use their company car extensively for private journeys rarely reach the break-even threshold, which explains why the vast majority of fleet operators have already withdrawn the benefit. For most drivers, accepting employer-paid private fuel is a poor financial deal, not a perk.
What counts as private mileage with the fuel BIK?
HMRC's definition of business mileage is specific. Only journeys made in the performance of the employee's duties, or travel to a temporary workplace under the 24-month rule, qualify as business travel. Everything else is private.
The category that most commonly causes confusion is the daily commute. Travel between an employee's home and their permanent workplace is treated by HMRC as private mileage, not business mileage, regardless of whether the vehicle is a company car. This catches out many businesses that assume that 'driving to work' is a business journey.
Private mileage includes:
Daily commuting to and from a permanent place of work.
Personal trips, holidays and leisure journeys.
School runs and family errands.
Shopping and any other non-work travel.
Business mileage includes:
Travel between two work sites or from the office to a client meeting.
Travel to a temporary workplace (one attended for less than 24 months).
Travel required in the performance of employment duties.
Keeping accurate, contemporaneous mileage records is not optional; it is an HMRC requirement. Without them, a business cannot demonstrate the business-to-private split, manage reimbursement correctly, or defend its position in an employer compliance review.
Mileage records: what HMRC expects
There is no prescribed format for mileage records, but HMRC will examine them closely in a payroll compliance review.
The records should be contemporaneous, created at the time of each journey, rather than reconstructed at year-end from memory or estimates.
For each journey, a good mileage record should capture:
Date of the journey.
Start and end locations (postcode-level is sufficient).
Business purpose of the journey.
Miles covered.
Whether the journey was business or private.
Fuel card transaction data is a valuable supporting document, but it is not a substitute for a mileage log. HMRC has rejected claims based solely on fuel card receipts with no corresponding journey record. The two should be used together.
Where records are absent or inadequate, HMRC can treat reimbursements as taxable earnings (attracting PAYE and Class 1 NIC rather than the lower Class 1A rate), challenge the employer's deductions, and apply penalties ranging from 0% for innocent errors to 100% for deliberate concealment. Fuel cards with integrated mileage tracking, or telematics systems that automatically log journeys, significantly reduce this administrative risk.
How to avoid the fuel benefit charge
There are two legitimate ways to eliminate the fuel benefit charge:
Option 1: Do not provide private fuel
The simplest approach is to restrict fuel cards and company-funded fuel to business journeys only. Employees use the fuel card for work travel; any private fuel is paid for entirely by the employee. No private fuel, no fuel benefit charge.
This requires a clear, written fuel policy that drivers understand and follow, and mileage records that demonstrate the business-only use. Fuel cards with transaction controls, limiting usage to business hours, certain locations, or certain journey types, can help enforce this.
Option 2: Full recovery of private fuel costs (making good)
If an employer does wish to provide fuel for private use and wants to avoid the benefit charge, the employee must repay the full cost of all private fuel before HMRC's deadline. HMRC accepts repayment in cash, by salary deduction, or by the employee reinstating equivalent fuel.
Important: The making-good deadline is 6 July following the end of the tax year. For 2025/26 fuel, full repayment must be made by 6 July 2026. Late repayment, even by a day, means the full charge applies for the whole year.
In practice, this means tracking every private mile and using HMRC's Advisory Fuel Rates (AFRs) to calculate the cost. The AFRs from 1 March 2026 are set out below.
Advisory Fuel Rates from 1 March 2026
Fuel type | Up to 1,400cc | 1,401–2,000cc | Over 2,000cc |
|---|---|---|---|
Petrol | 12p/mile | 14p/mile | 22p/mile |
Diesel | 12p/mile | 13p/mile | 18p/mile |
LPG | 10p/mile | 12p/mile | 19p/mile |
HMRC updates Advisory Fuel Rates quarterly. Always use the current rate at the time of the journey. Check gov.uk/guidance/advisory-fuel-rates for the latest figures.
Fuel BIK for van drivers: how the charge works differently
For van drivers, the fuel benefit operates on a simpler flat-rate basis rather than a CO₂-banded percentage. If a business provides a van for private use and also pays for private fuel, two separate charges apply.
Charge | 2025/26 | 2026/27 |
|---|---|---|
Van benefit charge (private use) | £4,020 | £4,170 |
Van fuel benefit (private fuel) | £769 | £798 |
Zero-emission van — both charges | £0 | £0 |
A basic-rate (20%) taxpayer with both charges in 2026/27 pays £4,170 + £798 = £4,968 × 20% = £993.60 in income tax. An employer's Class 1A NIC on the same van in 2026/27: £4,968 × 15% = £745.20.
Zero-emission vans attract no van benefit charge and no fuel benefit; removing both charges entirely is a powerful incentive toward electric van adoption.
One important change that affected the trades sector from 6 April 2025: double-cab pick-up trucks with a payload of one tonne or more are now taxed as company cars rather than vans for benefit-in-kind purposes. This means the CO₂-banded car BIK rates and the car fuel benefit multiplier apply, rather than the simpler flat-rate van charges. Businesses operating double-cabs should revisit their fleet tax calculations if they have not already.
Fuel benefit charge vs mileage reimbursement: which is better?
These two approaches are frequently confused but work very differently. The choice between them has a significant impact on both cost and administration.
| Fuel benefit charge | HMRC mileage reimbursement (AFR) |
|---|---|---|
When it applies | Employer pays for private fuel | Employee reclaims business mileage in company car |
Tax treatment | Taxable benefit on employee; Class 1A NIC on employer | Tax-free within HMRC AFR rates |
Based on | Fixed multiplier × CO₂ BIK % | Actual business miles × pence per mile rate |
Private mileage | Included — this triggers the charge | Not relevant — reimbursement is for business miles only |
Administration | Complex — full private mileage tracking required to avoid charge | Simpler — business mileage log plus AFR rate |
HMRC scrutiny risk | High if records are poor | Lower if records are contemporaneous |
For the vast majority of fleets, restricting fuel cards to business use and reimbursing employees for business mileage via AFRs is simpler, cheaper, and lower risk. The fuel benefit route only makes sense for very high-mileage private drivers, and even then, the administrative burden rarely justifies it.
Electric vehicles and charging: different rules apply
Electric vehicles are treated differently because HMRC does not classify electricity as 'fuel' under the relevant legislation. This has significant practical benefits for fleets transitioning to EVs.
Workplace charging is benefit-in-kind exempt
Where an employer provides EV charging at or near the workplace, whether for company cars or for employees' own electric vehicles, no benefit in kind arises. The exemption under Section 237A of the Income Tax (Earnings and Pensions) Act 2003 covers both the chargepoint infrastructure and the electricity consumed, provided the facility is available to employees generally at that workplace.
Home charging of a company EV is also exempt
HMRC confirmed in revised guidance (EIM23900) that, where an employer reimburses an employee for electricity used to charge a company-owned EV at home, no benefit-in-kind arises. This is because the reimbursement falls within the exemption for payments connected to a taxable car, and electricity is not treated as fuel under the legislation.
Advisory Electricity Rate from 1 March 2026
HMRC split the Advisory Electricity Rate into two distinct rates from 1 March 2026, reflecting the difference in cost between home and public charging:
Charging location | Rate from 1 March 2026 |
|---|---|
Home charging | 7p per mile |
Public charging | 15p per mile |
Where charging is mixed (both home and public), HMRC requires a 'fair and reasonable' apportionment between the two rates. Telematics data or records from the charger app should be retained to support this.
Employers can pay above these rates without triggering a benefit charge, provided they can evidence that the actual cost per mile exceeds the HMRC rate. Where they cannot, the excess becomes taxable earnings subject to PAYE and Class 1 NIC.
The OZEV Workplace Charging Scheme
Businesses installing EV chargepoints at their premises can claim a grant under the government's Workplace Charging Scheme, administered by OZEV (the Office for Zero Emission Vehicles). From 1 April 2026, the grant increased from £350 to £500 per socket, covering 75% of the cost of purchase and installation, up to 40 sockets per applicant. This can significantly reduce the upfront investment in depot charging infrastructure.
Mandatory payrolling of benefits: what's changing and when
One of the most significant administrative changes to fleet tax in recent years is the planned move to mandatory payrolling of benefits in kind. Rather than reporting benefits annually on a P11D form after the tax year ends, employers will be required to calculate and collect tax in real time through payroll.
Update: HMRC confirmed in April 2025 that mandatory payrolling of benefits in kind is delayed from 6 April 2026 to 6 April 2027. P11D and P11D(b) reporting remains in place for both 2025/26 and 2026/27.
The key dates fleet managers should be aware of:
6 July 2026: P11D and P11D(b) deadline for 2025/26. Class 1A NIC paid by 22 July 2026.
6 April 2027: Mandatory payrolling begins for most benefits, including company car and fuel benefits.
2027/28 cash flow note: Employers will face a double Class 1A NIC payment, the July 2027 P11D(b) settlement for 2026/27 plus real-time monthly Class 1A on payrolled 2027/28 benefits. Finance teams should plan for this.
From 2028/29: Normal payroll penalties apply for late or incorrect benefit reporting.
Voluntary payrolling of benefits is now available and worth considering as a dry run before the mandatory start date. Businesses with company-car-heavy fleets should also confirm that their payroll software can handle the per-period calculation of car and fuel benefit values, which currently flow through the P46(Car) process.
Common fuel benefit mistakes and how to avoid them
Assuming fuel cards are automatically tax-free
The fuel card itself creates no tax liability. What matters is whether the employer is funding private fuel. A fuel card used solely for business mileage, with no private element, is entirely tax-free, but the records must demonstrate this.
Not tracking private mileage properly
Many businesses provide fuel cards without robust processes to separate business and private use. Without contemporaneous records, HMRC can treat the entire fuel card spend as taxable earnings, not merely the private element, and apply PAYE and Class 1 NIC to the full amount.
Partial reimbursement of private fuel
As the all-or-nothing rule makes clear, asking an employee to contribute something toward private fuel, without recovering the full cost, provides no tax benefit. If full recovery is not achievable, removing the benefit and switching to business-only fuel cards is the correct approach.
Missing the making-good deadline
The 6 July deadline is firm. An employee who repays the full cost of private fuel after this date still triggers the charge for the whole tax year. Building reimbursement into a regular payroll deduction process throughout the year eliminates this risk.
Confusing the fuel benefit charge with VAT fuel scale charges
These are two separate obligations. Businesses that reclaim input VAT on road fuel that includes private use must also account for VAT via the road fuel scale charge, a quarterly output VAT charge based on the vehicle's CO₂ emissions. This is an entirely separate calculation from the income tax fuel benefit charge. Confusing the two leads to errors in both.
Assuming commuting is business mileage
It is not. Travel between an employee's home and their normal, permanent place of work is private mileage under HMRC rules, regardless of whether they drive a company car. Including commuting in a business mileage calculation inflates the business proportion and understates the private element, creating a compliance risk.
Practical steps for fleet managers
Step 1: Review whether the private fuel benefit still makes sense
The break-even mileage calculation is the starting point. At current fuel prices, most higher-rate taxpayers need to cover over 20,000 private miles a year before the fuel benefit charge is worthwhile. Run the numbers for your fleet; most businesses will find the benefits cost more in taxes than they save in fuel.
Step 2: Communicate clearly with drivers
If you are withdrawing private fuel provision, give drivers reasonable notice and explain the change in writing. Drivers may need to adjust budgets or vehicle-use habits. A short factsheet explaining the tax position, including what they have been paying in benefit charge, is often eye-opening and makes the transition easier to accept.
Step 3: Implement a clear fuel policy
Every fleet should have a written fuel policy that sets out what the fuel card can be used for, what counts as private mileage, how business mileage should be recorded, and how any reimbursement process works. Drivers should sign to confirm they have read and understood it. This document is also your first line of defence in an HMRC review.
Step 4: Use fuel cards and telematics together
Fuel card data, showing the date, location, volume and cost of every transaction, provides an excellent audit trail for HMRC purposes. Combined with telematics or a digital mileage log that records individual journeys, you have a coherent, defensible picture of business and private fuel use that significantly reduces compliance risk.
Step 5: Plan for payroll from April 2027
The shift to mandatory payrolling of benefits will change how the company car and fuel benefit tax is collected and reported. Use 2026/27 as a preparation year, consider voluntary payrolling, audit your payroll software's capability, and ensure your car data feeds are set up to support real-time benefit calculation.
Frequently asked questions
Is the fuel benefit charge mandatory?
Only if private fuel is provided by the employer and not fully repaid by the employee. If the fuel card is used only for business journeys, no charge applies.
Can an employee avoid the charge by repaying some of the private fuel cost?
No. Partial repayment provides no reduction. The charge either applies in full or not at all, depending on whether the employee recovers the full cost of private fuel by 6 July following the tax year.
Does commuting count as private mileage?
Yes. Travel between an employee's home and their normal place of work is private mileage under HMRC rules. This applies regardless of vehicle type or the distance of the journey.
Are fuel cards taxable?
Not inherently. A fuel card is a payment method. Tax arises only when the card is used to fund private fuel that is not reimbursed.
How does the EV charging benefit differ from the fuel benefit?
Electricity is not treated as 'fuel' under the relevant legislation. Workplace EV charging is fully exempt from benefit-in-kind, and employer-funded home charging of a company EV is also exempt under HMRC's revised EIM23900 guidance. The Advisory Electricity Rate (7p home / 15p public from March 2026) applies to business mileage reimbursement, not a benefit charge.
What happens if an employee uses a fuel card in their own car?
If an employer provides a fuel card for an employee's personal vehicle and that card is used for private fuel, the value of the private fuel is taxable as employment earnings, subject to PAYE income tax and Class 1 National Insurance. This is handled differently from the company-car fuel benefit charge and carries its own reporting obligations.
When does mandatory payrolling of benefits begin?
HMRC confirmed in April 2025 that the start date is delayed to 6 April 2027. P11D reporting remains in place for both 2025/26 and 2026/27.
Summary: the key decisions for your fleet
The fuel benefit charge is one of the most misunderstood costs in fleet management, but the core decision is not complicated. For almost all fleets, the mathematics have shifted decisively against providing employer-paid private fuel.
The multiplier rising to £29,200 in 2026/27, combined with the increase in Class 1A NIC to 15%, means the combined employer and employee cost of the fuel benefit now comfortably exceeds what most drivers spend on private fuel in a year. The administrative burden of correctly tracking, reporting and (where relevant) recovering private fuel costs adds further to the case for simplification.
The straightforward approach, fuel cards restricted to business use, business mileage reimbursed via Advisory Fuel Rates, clear written policy in place, gives fleet managers control, reduces tax exposure, simplifies administration and provides the audit trail HMRC expects.
As your fleet evolves and more vehicles move to electric, the charging landscape introduces new complexity around home versus public charging rates, OZEV grants, and the upcoming payrolling changes. Getting the fundamentals right now, accurate records, clear policy, and the right tools make managing that evolution considerably simpler.
About Right Fuel Card
Right Fuel Card is a leading UK business fuel card provider dedicated to helping businesses of all sizes, from sole traders to large fleets, take control of their fuel costs and simplify fuel expense management. With access to over 98% of fuel stations across the UK, competitive pricing, and HMRC-approved digital invoicing, we make fuel management effortless whilst helping you save money. Our comprehensive service includes detailed online reporting, dedicated customer support, and optional RightProtect legal support for complete peace of mind on the road. Whether you're managing a single vehicle or an entire fleet, Right Fuel Card provides the tools and support you need to operate efficiently and compliantly.
Looking to take better control of your fleet fuel spend?
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This guide was written on Friday, 15th May 2026 and published on Monday, 25th May 2026. All information contained within is correct at the time of writing. We try our best to continue to update our guides, but not all guides are regularly reviewed - for the latest news and insight visit: rightfuelcard.co.uk/news-insights
This guide is intended for general information purposes and does not constitute tax or legal advice. HMRC rules and rates change regularly. Businesses should seek professional advice on their specific circumstances. Rates correct as of May 2026.
