Motorway Service Stations Charge Drivers 17p More a Litre Than Local Pumps

Stop for petrol at a motorway service station and you will pay 17.1p more per litre than at a forecourt off the network, according to a new analysis of 168 UK motorway forecourts. Diesel carries a 13.8p premium. On a 55 litre tank, that is £9.41 extra for petrol and £7.59 extra for diesel, every single time a driver refuels there.

The figures come from a comparison of every motorway service station forecourt against the rest of the national network, using live prices pulled from the government’s own Fuel Finder data on 1 June 2026. This is not a rough estimate. RAC Fuel Watch has flagged the motorway premium for years, with published guesses ranging anywhere from 10p to 25p a litre. A single measured figure across the entire motorway network puts a hard number on what drivers have long suspected.

What Filling Up at the Services Really Costs

The gap holds across every fuel grade. Unleaded averaged 176.5p a litre at motorway services against 159.4p at ordinary forecourts on the day of the analysis. Diesel averaged 198.3p against 184.5p. The premium grades are worse still: super unleaded carries a 17.7p a litre gap and premium diesel a 15.6p gap, meaning performance car drivers who only fill up at the services pay the steepest penalty of all.

A handful of individual sites sit well above even that average. Welcome Break Telford topped the unleaded rankings at 186.9p a litre on the day measured, with several ASDA Express and Welcome Break sites across the West Midlands close behind at 185.9p. At the top end, a single 55 litre fill costs roughly £15 more than the same fill at the national local average, most of a second tank lost over a year of motorway stops.

The timing makes the gap harder to swallow. The RAC has predicted more than 14 million leisure trips on Britain’s roads across recent summer getaway weekends, the second highest total in the ten years its records have run. Families driving to the coast for the school holidays, hauliers running motorway routes daily, and commuters caught in roadworks all pass through the same handful of service stations where the price gap is at its widest. A haulier filling a large tank several times a week pays the 13.8p diesel premium every single stop, a cost that compounds fast across a fleet.

Forget Supermarket Versus Branded, the Motorway Is the Real Gap

Drivers have spent years hunting for the cheapest brand of forecourt, but the data shows that argument counts for little any more. Supermarkets averaged 159.2p a litre for unleaded and ordinary branded and independent forecourts averaged 159.5p, a gap of just 0.3p. The motorway, at 176.5p, is the true outlier. You do not need to find a supermarket to dodge the premium. Almost any forecourt away from the motorway network prices within a few pence of the cheapest option available.

Some Regions Pay Twice as Much Extra as Others

The premium is not spread evenly across the country. It runs steepest in the West Midlands, where motorway forecourts averaged 181.8p against a local average of 158.4p, a gap of 23.4p a litre. Yorkshire and the Humber followed at 20.6p, the East Midlands at 20.3p, and the North West at 20.2p. Most of England sits in a tight band around 20p a litre extra.

Wales and the East of England treat drivers far more gently, with premiums of 9.5p and 8.8p respectively. Precisely why the same national network of motorway operators charges a driver in the West Midlands nearly three times the mark-up of a driver in Wales has not been explained by any operator, and the analysis found no fuel quality difference to account for it. A driver planning a long trip through the Midlands cannot simply pick a cheaper brand to dodge the gap either, given the operators that dominate West Midlands services, Welcome Break, ASDA Express and BP, are the same names that appear cheaper elsewhere on the network. Motorway fuel meets the same BS EN 228 and BS EN 590 standards as any other UK forecourt.

Why Drivers Keep Paying It

Motorway forecourts charge more for a simple reason: they face almost no local competition and carry far higher site costs than a roadside station. A driver running low on fuel between junctions has little practical choice, and operators price for exactly that captive demand. Service area rents and concession fees dwarf what a normal petrol station pays for its plot, and that cost gets passed straight to the pump.

The Competition and Markets Authority has already put fuel retailers on notice this year over profiteering concerns more broadly, after diesel jumped 16p a litre in two weeks amid the Middle East conflict spike, arguing that retailers’ claims about rising costs do not fully explain why margins have stayed high compared with historic levels. Motorway services have not featured by name in that scrutiny so far, even as they carry the single largest and most consistent mark-up anywhere on the forecourt network.

The mark-up sits outside the usual explanations offered for pump price rises, such as wholesale cost swings or currency movements against the dollar. Those factors move the national average up or down together. The motorway premium stays roughly fixed relative to the local price on any given day, which points to a structural feature of how service stations are priced rather than a passing market condition. A driver paying 176.5p at a motorway pump when the local average sits at 159.4p is paying a location charge, not a fuel charge, and that charge does not fall when wholesale prices do.

How to Avoid the Motorway Markup

The fix costs nothing and takes almost no planning. Fill up at a supermarket or local forecourt before starting a long trip, rather than assuming you will find a good price once you are on the road. If your tank sits above a quarter full when you join the motorway, you can almost always reach a cheaper forecourt at your destination, or a short hop off the next junction, before the gauge forces your hand.

Compare prices at your planned exit rather than defaulting to whichever services come up on the sat nav, and treat the first town forecourt off any junction as your fallback stop if you do need fuel mid-trip. A three mile detour burns a few pence of fuel; staying on the motorway to refuel burns £9.41 on a full tank. The government’s own Fuel Finder scheme was meant to make these comparisons easy from inside the car, though our earlier investigation found the scheme’s reporting failures are still costing drivers around £40 a year through missing or delayed price data.

Live price comparison tools built on the government’s Fuel Finder feed let a driver check prices at every junction along a planned route before setting off, and cross-referencing that with a fuel cost calculator shows exactly how much a short detour saves against the cost of extra mileage. For a family driving from London to Cornwall, checking prices at three or four junctions along the M5 corridor before choosing where to stop can be the difference between paying the West Midlands premium and paying something closer to the Wales and East of England rate.

For more on how the wider fuel market has moved this year, see our coverage of diesel’s record one-month price drop and how the Middle East conflict drove petrol to a two year high. Whatever the national price does, the motorway premium sits on top of it, unchanged and largely unchallenged.

Sources:

• PetrolPal: Motorway Fuel Prices, We Checked 168 UK Forecourts
• RAC Fuel Watch
• Regit: Watchdog calls out retailers for overcharging