Two things get muddled whenever business fuel comes up: fuel cards, which are a commercial product you buy from a provider, and HMRC advisory fuel rates, which are a tax mechanism for company car fuel. They are not alternatives and they are not related. This guide takes them one at a time.
What a Fuel Card Actually Is
A fuel card is an account-based payment card issued to a business and used by its drivers at a defined network of stations. The fuel is billed to the business account rather than paid for personally and claimed back, and the provider supplies consolidated invoicing and reporting across the fleet.
Esso’s description of its own product is a fair illustration of the category. Esso says the Esso Card is powered by WEX Europe Services, that invoicing and reporting are available “at the touch of a button” so businesses can budget and track fuel spend, that it offers a number of payment and pricing options including pump price and commodity-based pricing, and that it gives access to over 6,000 Esso branded service stations and 250 motorway service stations across Europe. Source: esso.co.uk.
Read that pricing line carefully, because it is the most important sentence on any fuel card page. “Pump price” means the account pays what the sign says — the card is buying you administration and control, not cheaper fuel. Commodity-based or fixed-price arrangements work differently and shift where the price risk sits. Which one you are offered depends on your fleet, your volume and your negotiation, so no honest guide can tell you what you will save. Ask for the pricing basis in writing before anything else.
Where the Value Usually Sits
For most small fleets the genuine return is administrative rather than pence per litre: drivers stop fronting money and filing expense claims, spend is visible per driver and per vehicle, and the business gets one invoice instead of a pile of till receipts. Some providers add controls — restricting a card to particular fuel types or spend limits — and telematics as an extra service, which Esso lists as an option on its account.
The trade-off is network. A card tied to one brand’s stations removes exactly the freedom that produces savings for private motorists. On our own data across the roughly 3,900 UK stations we track on 16 August 2026, mean E10 prices ran from 152.9p at Sainsbury’s to 162.0p at BP, with Shell at 161.4p and Esso at 161.6p — a spread of about 9p per litre. A single-brand card at pump price locks a fleet into one point on that range, so the discount, if any, has to be measured against the brand you are giving up rather than against nothing.
The same logic applies at service areas, where the premium is largest. In our data, motorway-type stations — 42 sites identified by name and address heuristics, so indicative rather than exact — averaged 175.4p for E10 against 160.3p elsewhere and 197.2p for diesel against 184.0p. A card whose network is convenient mostly at services can quietly cost more than it saves. Our motorway fuel prices guide covers that gap in detail.
HMRC Advisory Fuel Rates: What They Are Not
Advisory fuel rates are not a discount, not a fuel price and not something a driver can claim at a forecourt. GOV.UK is unambiguous about scope: these rates only apply to employees using a company car. They are used either to reimburse employees for business travel in their company cars, or to work out how much an employee must repay for fuel used on private travel — and GOV.UK states you must not use them in any other circumstances.
The tax point is why they exist. GOV.UK explains that if the mileage rate you pay is no higher than the advisory rate for the engine size and fuel type of the company car, there is no taxable profit and no Class 1A National Insurance to pay. Where a car is more fuel efficient, or the real cost of business travel is higher than the guideline, an employer can use its own rates to reflect the situation.
The Rates from 1 June 2026
Petrol: 14p per mile for engines of 1400cc or less, 17p for 1401–2000cc, 26p for over 2000cc. Diesel: 15p for 1600cc or less, 17p for 1601–2000cc, 23p for over 2000cc. LPG: 11p, 13p and 21p across the same engine bands. Electric: 7p per mile for home charging and 15p per mile for public charging.
HMRC reviews these quarterly, on 1 March, 1 June, 1 September and 1 December, so a rate you set in a policy document has a shelf life of about three months. The calculation itself uses mean miles per gallon from manufacturers’ information weighted by business sales, with the LPG figure set 20% lower than petrol to reflect its lower volumetric energy density. Always check the current table on GOV.UK before applying a rate.
Fuel Cards and Advisory Rates Together
A fleet can use both, and they answer different questions. The card determines how the fuel gets paid for and how the spend is recorded. The advisory rate determines the tax treatment when a company car is used privately, or when an employee is reimbursed per mile. If your drivers are in company cars fuelled on a company card, the advisory rate is the number you use to recover private mileage; if they are reimbursed per mile for business travel, it is the ceiling that keeps the payment free of a taxable benefit.
One thing worth checking before you sign anything: which grade the card covers and at which sites. We found a super unleaded price at 2,849 of the 3,884 stations in our data, so coverage is broad but not universal — relevant if any vehicle in the fleet is not approved for E10 and must run on E5.
For Drivers Who Are Not on a Fleet
If you are a sole trader or a private motorist, none of the above is your lever. The savings are in where you fill up and in the open pricing data that now makes comparison possible — the Fuel Finder scheme requires stations across the UK to report price changes within 30 minutes, and the government estimates it will save car-owning households an average of £40 a year. Start with our guide to saving on fuel, and see our UK loyalty schemes guide for the retail schemes that are open to everyone.