Fuel and Vehicle Running Costs for a UK Trade Business — How to Control, Recover and Account for Them in 2026

Why Fuel Is One of Your Biggest Controllable Overheads

Think about a typical sole-trader plumber or electrician doing 15,000–20,000 business miles a year. At a real-world 35 MPG and diesel around £1.50 a litre, that is roughly £2,900–£3,900 a year on fuel alone — before you add servicing, tyres, insurance, road tax, the occasional clutch and the depreciation of the van itself. Run two or three vans and you are easily into five figures a year on running costs.

The reason it matters is that fuel is one of the few large overheads you can directly influence with day-to-day decisions. You cannot change your insurance premium mid-policy, but you can choose a tighter route, drive more smoothly, keep tyres at the right pressure, and turn down jobs that are 40 miles away at the wrong price. Treating fuel as a fixed cost of doing business is the mistake. Treat it as a number you actively manage and it becomes a lever on your profit.

Working Out Your True Cost-Per-Mile

Most trades only think about fuel when they fill up. But the real cost of running the van per mile is much higher than the fuel alone — and unless you know that figure, you cannot price travel correctly or judge which jobs are worth the drive. Your true cost-per-mile is made up of four things: fuel, mechanical wear and servicing, tyres, and a share of the fixed costs (insurance, road tax, MOT, depreciation) spread across the miles you do.

Here is a worked example for a mid-size diesel van doing 18,000 business miles a year. Adjust the numbers to your own van and figures, but the method is what matters.

• Fuel: 18,000 miles at 35 MPG and £1.50/litre works out around £3,500 a year, or roughly 19–20 pence per mile.
• Servicing and repairs: two services, brakes, a few odd jobs — call it £900 a year, or 5 pence per mile.
• Tyres: a set of four every 25,000 miles at £150 each is around £430 a year, or 2–3 pence per mile.
• Fixed costs spread over the miles: insurance, road tax, MOT and depreciation might total £3,000 a year, which across 18,000 miles is about 17 pence per mile.

Add the running elements together and you are looking at roughly 27–28 pence per mile for fuel, servicing and tyres alone, or around 44 pence per mile once you fold in the fixed costs. That number is the one to keep in your head. A "quick" 30-mile round trip is not free — at 44 pence per mile it is costing you over £13 in van running costs before you have lifted a tool.

Building Travel and Fuel Into Your Pricing

Once you know your cost-per-mile, the next step is making sure your prices actually recover it. The most common reason trades lose money on distant jobs is that they quote the same labour and materials regardless of how far they have to drive — so a job ten minutes away and a job an hour away earn the same, but one of them eats an extra two hours and 50 miles out of the day.

There are a few ways to build travel into your numbers, and most trades use a combination:

• A call-out or travel charge that covers the cost of getting to site — either a flat fee within a set radius or a per-mile rate beyond it. This protects you on small jobs where the drive is a big share of the day.
• A wider hourly or day rate for work outside your core area, reflecting both the fuel and the unbillable driving time.
• A minimum charge so that no job, however small, is priced below the point where the travel wipes out the margin.

The principle is simple: every mile the van turns over should be accounted for somewhere in the price. You do not have to itemise it on the customer's quote — many trades fold it into the overall figure — but it has to be in there. If you find yourself regularly travelling well outside your area for the same price as local work, your pricing is subsidising your customers' postcodes out of your own pocket.

Fuel Cards — Are They Worth It?

Fuel cards are accounts that let you pay for fuel at a network of stations and receive a single consolidated invoice, usually with HMRC-compliant VAT receipts built in. For a one-van business they are not always worth the hassle, but as you add vans and drivers they become genuinely useful.

The advantages:

• One invoice instead of a shoebox of crumpled receipts — and the VAT is itemised correctly for your return.
• Often a small discount on pump prices, particularly on diesel at supermarket and motorway networks, though the savings vary and some cards charge a fee.
• Visibility of who spent what, where and when — useful for spotting a driver filling up unusually often or going to forecourts nowhere near a job.
• Spending controls — you can cap weekly limits or restrict cards to fuel only.

The drawbacks:

• Some cards carry monthly or per-card fees that wipe out the saving if your mileage is low.
• Networks are not universal — a card that is cheap on motorway stations may not be accepted at the supermarket you usually use.
• Credit terms can tighten cash flow if you are not careful, since you are effectively buying fuel on account.

For a sole trader, an ordinary business debit or credit card plus a tidy receipt habit often does the job just as well. For a small fleet, a fuel card's reporting and VAT handling usually pays for itself in saved admin time alone.

Route and Job Planning to Cut Dead Miles

Dead miles — the driving that earns you nothing — are where fuel money quietly disappears. Crossing town twice in a day because two nearby jobs were booked on different mornings, or driving home for lunch and back, all burns fuel and time you never get paid for. Tightening up how you plan the week is the single biggest lever most trades have over their fuel bill.

• Cluster jobs by area. Where you have flexibility on dates, try to book jobs in the same postcode or direction on the same day rather than zig-zagging across your patch all week.
• Plan the day's route the night before so you are not backtracking. A logical sequence of stops can shave real mileage off a busy day.
• Batch your merchant runs. Pick up materials for several jobs in one trip rather than nipping to the wholesaler every time you need a fitting.
• Set a sensible working radius and only break it for jobs priced to cover the extra travel.

Keeping a record of where your jobs actually are, and how far you drive for each, makes these decisions easier. When you can see that a particular town is costing you 40 minutes each way for the same money as local work, you can either reprice it or stop chasing it.

Driving Style and Maintenance to Improve MPG

How the van is driven and looked after can swing your fuel economy by 10–20% — which on a £3,500 fuel bill is several hundred pounds a year. None of it is complicated; it is mostly habit and routine maintenance.

• Smooth driving: gentle acceleration, reading the road ahead and easing off early rather than braking hard. Hard acceleration and heavy braking are the biggest fuel-wasters.
• Tyre pressure: under-inflated tyres increase rolling resistance and burn more fuel — check pressures regularly, especially when the van is loaded.
• Lose the dead weight: a van full of materials you do not need that day is hauling extra kilos around all week. Roof racks and ladders left on when not needed add drag too.
• Keep it serviced: a clogged air filter, worn spark plugs or dirty injectors all hurt MPG. Regular servicing pays for part of itself in fuel.
• Cut idling: a van ticking over on a driveway or outside a customer's house burns fuel for nothing.

Diesel vs Petrol vs Electric and Hybrid Vans

The right fuel type depends on how you use the van, and the running-cost trade-offs are very different. This is a high-level view — get specific quotes for your own mileage before switching.

Diesel remains the default for most trades doing high mileage. It returns the best MPG on long motorway runs and pulls a loaded van comfortably, but diesels are penalised in clean-air and low-emission zones in some cities, and the engines are more expensive to repair when something goes wrong.

Petrol vans are cheaper to buy and often cheaper to maintain, and they make sense for lower-mileage, mostly-urban use. The downside is poorer fuel economy on longer runs and on heavily loaded vans, so for high annual mileage the fuel cost usually outweighs the lower purchase price.

Electric and plug-in hybrid vans have far lower fuel (energy) costs per mile if you can charge at home or base overnight, and they avoid clean-air zone charges. The trade-offs are a higher purchase price, range that may not suit a long rural day, charging time, and reduced range when carrying a heavy load or towing. For a local, predictable-route trade with off-street charging, the running-cost case can be strong; for someone covering big distances across a county, diesel often still wins on total cost. Run your own numbers on the miles you actually do rather than the manufacturer's headline range.

Claiming Fuel Against Tax

There are two main ways to account for vehicle costs against tax, and you generally have to pick one approach per vehicle and stick with it.

The simplified mileage method lets you claim a flat rate per business mile that is intended to cover fuel, servicing, insurance, depreciation — everything. You keep a mileage log and claim the set rate for every business mile driven. It is simple, needs less record-keeping, and suits people who do not want to track every running cost separately. The rate is a fixed pence-per-mile figure that steps down after a threshold of miles in the year.

The actual-cost method means claiming the real running costs of the van — fuel, servicing, tyres, insurance, road tax — apportioned to the business-use share, plus capital allowances on the cost of the van itself. This involves more record-keeping but can give a bigger deduction, particularly on an expensive or high-running-cost vehicle, or where capital allowances on the van are significant.

If you are VAT-registered, you can normally reclaim the VAT on fuel used for business. Where the van is also used privately, HMRC's fuel scale charge is the usual way to account for the private element — it adds a fixed amount of output VAT based on the vehicle's emissions so you do not have to split every receipt. The alternative is keeping detailed mileage records to reclaim only the business proportion. Which works out cheaper depends on how much private mileage you do. Rates and thresholds change, so check the current figures or ask your accountant before you file — the principles above are the durable part.

Keeping Records That Stand Up

Whichever tax method you use, good records are what turn a fuel cost into a clean, defensible deduction — and what let you spot waste in the first place. The basics:

• A mileage log showing date, journey, business purpose and miles. Phone apps can capture this automatically, or a notebook in the glovebox works if you are disciplined.
• Every fuel receipt kept — essential for the actual-cost method and for reclaiming VAT. Photograph them so a faded thermal receipt does not cost you a deduction.
• Service and repair invoices filed with the date and mileage, so you can see your real cost-per-mile building up over the year.
• A clear split between business and private use, because that proportion drives both your tax claim and your VAT position.

HMRC expects you to be able to show how you arrived at your figures. Tidy records mean you claim everything you are entitled to without the worry of an enquiry catching you out.

Track Which Jobs and Areas Actually Make Money

The final piece is using all of this to price better. Two jobs can look identical on paper — same labour, same materials, same quote — but if one is local and the other is 30 miles away, the local one is far more profitable once travel time and fuel are stripped out. Most trades never measure this, so they keep taking distant work at prices that quietly lose money.

When you record where your jobs are and what they cost to reach, patterns emerge. You might find that a particular town only pays once you add a travel charge, or that clustering work into two days a week instead of five cuts your mileage sharply. Tracking job profitability after travel is what turns a gut feeling into a pricing decision you can defend. The Trade2Base demo dashboard shows how seeing margin per job — travel included — helps you price the next one properly.

Quick Reference: Cost-Per-Mile and Fuel-Saving Tactics

FAQ

How do I work out my cost-per-mile?

Add up your annual fuel, servicing, tyres and a share of your fixed costs (insurance, road tax, MOT, depreciation), then divide the total by your business miles for the year. For a typical mid-size diesel doing 18,000 miles, that often lands around 44 pence per mile once everything is included.

Should I charge customers for travel?

If the drive is a meaningful share of the day, yes — through a call-out fee, a per-mile charge beyond a set radius, or a minimum job charge. You do not have to itemise it, but the travel cost should be recovered somewhere in your price or you are subsidising distant work.

Are fuel cards worth it for a small trade business?

For a single van they are often more hassle than benefit unless you value the consolidated VAT receipts. For two or more vans, the reporting, spending controls and saved admin usually justify them — just watch for monthly fees and check the network is accepted where you fill up.

Which tax method is better — mileage rate or actual costs?

The simplified mileage rate is easier and needs less record-keeping; the actual-cost method can give a bigger deduction on an expensive or high-running-cost van, including capital allowances. The right choice depends on your vehicle and mileage, so it is worth running both past your accountant.

Is an electric van cheaper to run than diesel?

Energy cost per mile is usually much lower if you can charge at home or base, and you avoid clean-air zone charges, but the higher purchase price, charging time and reduced range under load count against it. For local, predictable routes the case is strong; for big daily distances, diesel often still wins on total cost.