UK SME guide · Updated May 2026
UK Business Fuel Cost Tracker (Diesel & Petrol)
Track diesel and petrol against the latest gov.uk weekly average and forecast your fleet's annual fuel bill.
Forecast your fleet fuel cost →Track diesel and petrol against the latest gov.uk weekly average and forecast your fleet's annual fuel bill.
Forecast your fleet fuel cost →The single source of truth is the gov.uk weekly road fuel prices CSV — updated every Monday. Supermarket forecourts (Asda, Tesco, Sainsbury's, Morrisons) are typically 4–8p/litre below the national average; motorway services are 15–20p/litre above.
Our live intelligence feed pulls the gov.uk number weekly so you don't have to.
Annual fuel cost ≈ (annual miles ÷ MPG) × 4.546 × £/litre. A 30,000-mile/year diesel van at 38 MPG with diesel at £1.50/litre = ~£5,400/year per van.
Plug your real numbers into the Fuel Cost Estimator.
The Department for Energy Security & Net Zero (DESNZ) publishes weekly average road fuel prices on gov.uk every Monday, broken down by petrol, diesel, and region.
Yes, but if the same vehicles are used privately you must either pay the HMRC fuel scale charge or only reclaim VAT on the business proportion. Most SMEs use the scale charge — it's simpler.
HMRC's approved mileage allowance is still 45p per mile for the first 10,000 business miles in your own car, and 25p thereafter. For company cars use the Advisory Fuel Rates instead.
On home/depot charging — yes, typically 5–8p per mile vs 18–22p for diesel. On public rapid charging the gap closes to almost nothing.