The One Thing You Can’t Do
Reducing card processing costs in the UK comes with one hard boundary worth stating upfront: since January 2018, businesses cannot legally add a surcharge for a customer choosing to pay by consumer card. So “charge the customer more for using a card” isn’t on this list, because it isn’t legal. Everything below works within that constraint.
1. Know your effective rate, not just your headline rate.
Add up everything actually paid last month: transaction fees, terminal rental, PCI compliance, any chargebacks, then divide by total card turnover. That percentage, not the number on the original contract, is what’s actually being paid. It’s the only fair way to compare a new quote against a current deal.
2. Push for interchange-plus pricing if the card mix is mostly UK consumer debit.
Flat-rate pricing, the same percentage on everything, is simple but effectively overcharges low-cost transactions to subsidise expensive ones. If most customers pay with ordinary UK debit cards, interchange-plus, paying the real regulated cost (0.2% or 0.3%) plus a transparent provider markup, is very likely cheaper.
3. Negotiate the one part that’s actually negotiable: the provider’s markup.
Interchange is capped by law, scheme fees are set by Visa and Mastercard, neither moves for any individual business. The processor markup is the only component the provider controls, and it’s the one to push on directly, particularly once there’s a full year of transaction data to show a provider what real volume looks like.
4. Reduce the chargeback rate deliberately.
At £15 to £30 per dispute, and with rates above roughly 1% risking a rate increase or account review, clear refund policies, prompt dispute responses, and accurate order or delivery details all pay for themselves by keeping this number down.
5. Read the contract for the fees that aren’t the headline rate.
Minimum monthly charges, early termination penalties (£300 to £1,000+), and non-sterling surcharges (0.5% to 2.5%) don’t come up in a sales conversation but do show up on the statement. Ask for the complete fee schedule in writing before signing, and check the contract length against how settled the business actually is.
None of these require switching providers immediately. The first step is simply working out the real, current effective rate. Most businesses have never calculated it, which is exactly why there’s usually room to bring it down.
Start with step one. We’ll calculate your effective rate free, in about two minutes.