Fleet cost tracking is the process of recording every expense your vehicles generate, including fuel, insurance, tax, maintenance, tyres and depreciation, so you know the true cost of each vehicle and every mile driven. For small UK fleets, consistent tracking typically uncovers savings of 10 to 15 per cent of annual running costs within the first year.
Most small operators in the UK run between two and ten vehicles, and very few could say what any single one of them costs to keep on the road. Receipts sit in glove boxes, invoices sit in inboxes, and the only figure anyone ever sees is the monthly fuel bill. This guide sets out what UK fleet costs look like in 2026, which expenses to record, and how to build a tracking habit that pays for itself.
What is fleet cost tracking and why does it matter?
Fleet cost tracking means recording, categorising and reviewing every cost attached to every vehicle in your fleet, from fuel receipts to insurance renewals. It matters because vehicles are usually one of the largest expenses a small UK business carries, and untracked fleets routinely overspend on fuel, maintenance and vehicles kept past their economic life.
A fleet, for cost purposes, is any group of two or more vehicles run by one organisation. Fleet cost tracking assigns every pound spent to a specific vehicle, identified by its registration number, and to a specific category such as fuel or servicing. Over time this produces the two numbers that drive every good fleet decision: total cost per vehicle per year, and cost per mile.
Without those numbers, common problems stay invisible. A van that quietly drinks 15 per cent more fuel than its twin looks fine on a combined fuel bill. A car generating £1,200 of repairs a year looks like a series of unrelated invoices rather than a candidate for replacement. Untracked costs also make quoting risky: if you price jobs without knowing your true cost per mile, some of your work is almost certainly unprofitable.
Tracking protects you beyond the day to day as well. Insurers, accountants and lenders all respond better to documented running costs than to estimates, and a complete cost history raises a vehicle's credibility when you come to sell it.
How much does it cost to run a fleet vehicle in the UK in 2026?
A typical company car in the UK costs £3,500 to £5,000 per year to run before depreciation, while a medium panel van usually comes in at 45p to 65p per mile once every cost is counted. Fuel is the largest single expense for most fleets, followed by depreciation, insurance and maintenance.
Here is a realistic annual budget for a fleet car covering 12,000 miles a year at typical 2026 UK prices:
| Cost category | Typical annual cost |
| --- | --- |
| Fuel (12,000 miles, petrol) | £1,700 to £2,100 |
| Insurance (business use) | £600 to £1,100 |
| Vehicle tax (VED, standard rate) | £195 |
| MOT test (maximum fee, class 4) | £54.85 |
| Servicing and maintenance | £400 to £600 |
| Tyres | £150 to £300 |
| Depreciation or finance | £1,500 to £3,000 |
| Total | £4,600 to £7,350 |
Two of those figures are set by government. The maximum MOT fee for a car is £54.85, and the standard rate of vehicle tax is £195 a year for most cars first registered after April 2017. The rest move with the market. In mid 2026, average pump prices sit around £1.35 per litre for petrol and £1.42 for diesel according to the government's weekly road fuel price statistics, which keeps fuel at the top of the cost table for almost every fleet.
Vans cost more per mile than cars. A medium panel van doing 20,000 miles a year commonly lands between 45p and 65p per mile once fuel, finance, maintenance, insurance and downtime are all counted. At 20,000 miles, the gap between 45p and 65p is £4,000 a year per van, which is exactly why tracking matters.
Which costs should you track for every fleet vehicle?
Track seven core categories for every vehicle: fuel, insurance, vehicle tax, maintenance and servicing, tyres, MOT and repairs, and depreciation or finance payments. Add irregular items such as fines, tolls, parking, cleaning and accident excesses. Recording each cost against the individual vehicle, not a general pot, is what makes the data useful.
What are fixed fleet costs?
Fixed costs stay the same however far the vehicle travels. They include insurance premiums, vehicle excise duty, finance or lease payments, breakdown cover and any permits the vehicle needs. Fixed costs are easy to forget because most arrive once a year, so record them when they are paid and spread them across the year when you calculate cost per mile.
What are variable fleet costs?
Variable costs rise with every mile. Fuel or charging is the biggest, followed by servicing, tyres, repairs, MOT work, consumables, tolls, parking and valeting. Depreciation behaves partly like a variable cost too, because higher mileage lowers resale value. Variable costs are where vehicles and drivers differ most, so this is where tracking finds its savings.
One habit ties the whole system together: record the odometer reading every time you buy fuel or pay an invoice. A cost without a mileage reading attached can never become a cost per mile.
How do you set up a fleet cost tracking system?
Set up fleet cost tracking in four steps: choose one place to record costs, create a record for each vehicle under its registration number, log every expense with its date, mileage and category, then review cost per mile monthly. A dedicated app does this faster than a spreadsheet, but any consistent system beats none at all.
- Pick one system and retire everything else. Costs scattered across a fuel card portal, an accounts package and a drawer of receipts will never add up to a per vehicle picture.
- Create one record per registration number. Every invoice, receipt and renewal gets filed against a specific vehicle from day one.
- Capture costs the moment they happen. Photograph the receipt at the pump or the service desk. Reconstructing a quarter of paperwork later is the point where most tracking efforts die.
- Review monthly. Fifteen minutes a month comparing each vehicle's cost per mile against last month and against its siblings is where the savings actually get found.
| Method | Typical cost | Ongoing effort | Best for |
| --- | --- | --- | --- |
| Paper folder of receipts | Free | High | A single vehicle, short term |
| Spreadsheet | Free | Medium | Two or three vehicles and a disciplined owner |
| Dedicated app such as CarFile expense tracking | Free to a few pounds a month | Low | Small fleets that want cost per mile, receipt storage and reminders without the admin |
How does fleet cost tracking cut your running costs?
Tracking cuts costs by exposing your worst performers. Once you know each vehicle's cost per mile, you can compare drivers, spot fuel loss, fix small faults before they become large invoices, and retire vehicles whose repair bills now exceed their value. Operators who review costs monthly typically trim total fleet spend by 10 to 15 per cent.
Fuel benchmarking is the quickest win. Work out miles per gallon for each vehicle each month. If two similar vans differ by more than 10 per cent, the cause is usually driving style, tyre pressures, an unreported fault or fuel going somewhere it should not, and every one of those is fixable once it is visible.
Maintenance data answers the repair or replace question with arithmetic instead of sentiment. A useful rule of thumb: when a vehicle's annual repair spend passes half its resale value, replacement usually costs less than loyalty. Without per vehicle records, that threshold slips past unnoticed, one invoice at a time.
Accurate cost per mile also sharpens pricing. If you charge customers for travel, quote for jobs or weigh a new lease against keeping an older vehicle, you need your real figure rather than a guess. CarFile's free cost per mile calculator does the arithmetic from your own numbers in a couple of minutes.
What are the tax and compliance benefits of tracking fleet costs?
Accurate cost records reduce your tax bill and keep you ready for an HMRC enquiry. VAT registered businesses can reclaim VAT on fuel and maintenance with valid receipts, and employees using their own cars can be paid 45p per mile tax free for the first 10,000 business miles. HMRC expects business records to be kept for six years.
For staff driving their own vehicles on business, HMRC's approved mileage allowance payments let you reimburse 45p per mile for the first 10,000 business miles and 25p per mile after that with no tax consequences, provided mileage records exist to support the claims. For company owned vehicles, fuel, servicing, insurance and repairs are allowable business expenses, so every unrecorded receipt is tax relief thrown away.
Cost records also overlap heavily with staying legal. The same file that holds your invoices should hold MOT dates, tax renewals and service history, because a lapsed MOT costs far more than a missed appointment: driving without one risks a fine of up to £1,000 and can invalidate insurance. If you run several vehicles, a purpose built fleet compliance dashboard keeps expiry dates and expenses in one place, so the person who pays the bills is also the person who sees the deadlines.
Frequently Asked Questions
What is the best way to track fleet costs for a small UK business?
The best way for a fleet of two to ten vehicles is a dedicated vehicle cost app that records every expense against each registration number and calculates cost per mile automatically. A spreadsheet works for one or two vehicles if it is updated weekly. Whichever tool you choose, log costs as they occur, attach an odometer reading to each entry, and review every vehicle's cost per mile monthly.
How do I calculate cost per mile for a fleet vehicle?
Add up every cost the vehicle generated over a period, including fuel, insurance, tax, maintenance, tyres and depreciation, then divide by the miles driven in the same period. For example, a van costing £9,000 a year and covering 18,000 miles costs 50p per mile. Use at least six months of data, because a single large repair bill will distort a shorter period.
How long should I keep fleet expense records for HMRC?
Limited companies must keep business records, including vehicle expenses and mileage logs, for six years from the end of the relevant accounting period. Self employed drivers must keep records for at least five years after the 31 January submission deadline of the tax year concerned. Digital copies of receipts and invoices are acceptable to HMRC, so photographing paperwork into an app satisfies the requirement.
What is a good cost per mile for a UK van?
A well run medium panel van in the UK typically costs 45p to 65p per mile in 2026, counting fuel, finance, insurance, maintenance, tyres and tax. A figure under 45p usually reflects an efficient, high mileage operation, while anything above 70p deserves investigation, starting with fuel economy and repair spend. Small cars used for business commonly run at 35p to 55p per mile.
Can I track fleet costs for free?
Yes. A spreadsheet costs nothing and works for a very small fleet if you record every expense with its date, category, vehicle and odometer reading, and update it at least weekly. Free tiers of vehicle management apps go further by storing receipt photos and working out cost per mile automatically. The real price of any method is discipline: an abandoned tracker of any kind is worth nothing.
Where should you start with fleet cost tracking?
Start today with one vehicle. Gather the last twelve months of invoices, fuel receipts and renewal letters, total them, and divide by the miles driven. That single cost per mile figure will change how you see the whole fleet, and it takes one evening to produce. Then put a system in place that captures costs as they happen, so you never have to reconstruct a year of paperwork again.
CarFile gives UK drivers and small fleet operators one place to log expenses, store documents and watch cost per mile for every vehicle, with MOT and tax reminders built in. Create your free CarFile account and add your first registration number before the next fuel receipt lands.