Brand Loyalty Cost Calculator
Are you paying a hidden premium just because you always fill up at the same brand? Enter your postcode, preferred brand, and driving habits to find out exactly how much your brand loyalty is costing you each year.
We'll find stations near this postcode.
Why Brand Loyalty Costs Money
Most UK drivers fill up at the same forecourt out of habit. The station is on their commute, they trust the brand, or they collect loyalty points. But this convenience comes at a cost. Branded stations like Shell and BP typically charge 5–10p more per litre than nearby supermarket forecourts selling fuel from the same refineries.
Over a year of driving, that price gap adds up to £100–£400 depending on your mileage and local price variation. Over five years, you could be looking at over £1,000 spent purely on brand loyalty.
The Supermarket Advantage
Supermarkets like Asda, Tesco, Sainsbury's, and Morrisons use fuel as a loss leader to attract shoppers into their stores. They operate on thinner margins than dedicated forecourt operators, which means consistently lower pump prices. All UK fuel must meet the same British Standards (BS EN 228 for petrol, BS EN 590 for diesel), so the base fuel is identical regardless of where you buy it.
When Loyalty Cards Make Sense
Loyalty schemes like Nectar (at Esso) or Clubcard (at Tesco) typically earn you the equivalent of 1–2p per litre in rewards. That is meaningful, but only if the station's pump price is already competitive. If a Shell station charges 8p more than a nearby Asda, earning 1p back through a loyalty card still leaves you 7p worse off per litre. The best strategy is to use loyalty cards at whichever station is already the cheapest in your area.
How the Calculator Works
We fetch live prices from stations near your postcode using official CMA data. The calculator finds every station matching your chosen brand and computes the average price. It then identifies the single cheapest station in the area regardless of brand. Using your annual mileage and MPG, we calculate how many litres you burn each year and multiply by the price difference to show your annual loyalty tax.
- Annual litres = (annual miles ÷ MPG) × 4.546 litres per imperial gallon.
- Brand cost = annual litres × your brand's average price per litre.
- Cheapest cost = annual litres × the cheapest station's price per litre.
- Loyalty tax = the difference between the two.
To find the cheapest fuel near you right now, use our price comparison tool. For tips on reducing your fuel bill, see our guide on 15 ways to save money on fuel.