Fuel cards can simplify administration and give a business better visibility of fuel spend, but they are not automatically the cheapest way to buy fuel.
Administration is often the main benefit
Consolidated invoices and vehicle or driver reporting can reduce receipt handling and make unusual transactions easier to spot.
Pricing structures differ
Some cards use pump prices, some use fixed or network prices, and fees may apply. Compare the actual network your drivers can use.
Controls can reduce misuse
Cards can often be restricted by fuel type, spend or product category. Those controls only help if someone reviews the reports.
Coverage matters
A good national network can be less useful if your vehicles repeatedly operate in areas with poor access to participating sites.
Do not confuse convenience with saving
The right question is whether the total arrangement saves money or management time for your particular fleet.
Example: small savings versus admin savings
If five vans use 1,000 litres of fuel a month between them, even a 2p-per-litre price difference is only £20 a month. The bigger benefit for some businesses may be consolidated invoices, less receipt chasing and better visibility of unusual purchases.
For another business, a card with poor local coverage or transaction fees could be less attractive than ordinary forecourt payment. Look at the total arrangement, not only the advertised pence-per-litre figure.