How to read a UK card processing statement (line by line)
Every UK merchant gets a statement. Almost none of them know how to read it. This guide walks through a real Worldpay statement line by line — what each charge actually is, where the acquirer's margin hides, and the one number you should care about more than any other: the effective rate.
Why the statement is worth reading at all
The statement is the only document that tells the truth about what a merchant is actually paying to take card payments. Quotes can hide behind blended rates and bundled fees. The statement can't — it lists every charge that hit the bank account in the month, in pounds and pence.
If you're a payment consultant, the statement is the lever you use to win business. If you're a merchant, it's the lever you use to negotiate. Either way, the work starts with reading it properly.
The four parts of every statement
Every UK card processing statement, no matter the acquirer, breaks down into four parts: the volume summary, the per-transaction fees, the monthly fixed fees, and the totals.
The volume summary is the easiest. It shows how many transactions the merchant processed and the total value, usually split by card type — debit, credit, commercial, international. This is the denominator for every calculation that follows.
The per-transaction fees are where the real money is. These include interchange (paid to the card-issuing bank), scheme fees (paid to Visa/Mastercard) and the acquirer's margin. On an interchange-plus statement these are listed separately; on a blended statement they're rolled into one rate.
The monthly fixed fees include the terminal rental, PCI compliance fee, statement fee, gateway fee and any other recurring line item. These are easy to spot and easy to renegotiate.
The totals are what the merchant actually paid. If the totals don't reconcile to the bank account, something is wrong — start there.
Interchange: what it is and why it's not negotiable
Interchange is the fee paid by the acquirer to the card-issuing bank for every transaction. It's set by Visa and Mastercard, not by the acquirer, and in the UK and EU it's capped by regulation — 0.20% on consumer debit and 0.30% on consumer credit, with no cap on commercial cards or international cards.
No acquirer can change interchange. Anyone who tells you they can is either confused or lying. The only way to reduce interchange is to change the card mix — for example, by adding 3D Secure to drive more transactions into the consumer-debit-regulated band.
On the statement, interchange should appear as a separate line on an interchange-plus contract. On a blended contract, it's hidden inside the headline rate — which is exactly why blended contracts are worth more to the acquirer.
Scheme fees: the second layer of cost
Scheme fees are paid by the acquirer to Visa and Mastercard for using their networks. They're smaller than interchange — typically 0.02% to 0.05% — but there are a lot of them, and they're rising every year.
On a clean statement, scheme fees appear as a line or a small number of lines below interchange. On a less-clean statement, they're rolled into 'card scheme fees' as a single number, which makes it impossible to tell whether the acquirer is passing them through at cost or marking them up.
Rule of thumb: if scheme fees come out at more than 0.10% of total volume on a UK-card-only merchant, the acquirer is taking a margin on them. That's not necessarily wrong — but it should be on the table when you negotiate.
Acquirer margin: the only number the acquirer controls
Acquirer margin is the bit on top — the difference between what the acquirer pays Visa/Mastercard and the issuing bank, and what they charge the merchant. On an interchange-plus statement, it's the 'plus' part of the rate (e.g. interchange + 0.25%).
Acquirer margin is the only number the acquirer can actually negotiate, because it's the only number that belongs to them. The merchant's job — and the consultant's job — is to make sure they're paying the right margin for the right service level.
A typical UK SME pays an acquirer margin of 0.20% to 0.40% on top of interchange. Sub-0.20% is usually only available at higher volumes or under aggressive new-acquisition pricing. Above 0.50% should trigger a hard look at the contract.
The effective rate: the one number that matters
Forget every individual line for a moment. The single most useful number on the statement is the effective rate — total cost divided by total volume.
Total cost includes everything: interchange, scheme fees, acquirer margin, terminal rental, PCI fees, statement fees, the lot. Total volume is the value of card transactions processed. Divide one by the other and you get a single percentage that tells the merchant the truth about what they're paying.
A UK SME merchant on a competitive contract pays an effective rate of around 1.0% to 1.5%. Above 2.0% on a UK-card-heavy mix means there's a saving on the table. Below 0.8% on a card-present consumer-debit-heavy mix means the contract is already excellent and the consultant should move to a value-add conversation, not a price one.
Once you have the effective rate, every other number on the statement becomes context for it.
Common traps to watch for
Non-qualified rates: on a blended contract, transactions that don't fit the headline rate get bumped to a higher 'non-qualified' rate. This can add 0.30% or more to the effective rate without the merchant noticing. Always check the non-qualified line.
Tiered pricing: similar to non-qualified, but with multiple tiers. If the statement shows three or four different per-transaction rates, the contract is tiered — and the merchant is almost certainly paying more than they think.
Terminal rentals on long contracts: a £25/month terminal rental on a 48-month contract is £1,200 over the term. On a low-volume merchant that can be 30% of total card cost. It's worth a separate negotiation.
PCI non-compliance fees: triggered when a merchant fails to complete the annual PCI questionnaire. Often £20-£50/month. Fixable with one phone call to the acquirer.
Cross-border and commercial card surcharges: above-and-beyond charges for non-UK or business-issued cards. On the wrong contract these can be punitive — worth checking against the merchant's actual card mix.
What to do once you've read the statement
If you're a consultant, the next move is a quote — a proposed alternative contract that lowers the effective rate without sacrificing service. A clean quote shows the merchant their current effective rate, the proposed effective rate, and the annual cash saving in pounds.
If you're a merchant, the next move is to ask your current acquirer for a renegotiation on the basis of the effective rate. Acquirers very rarely lose merchants on price when challenged early — they'd rather match a quote than lose the book.
Either way, the work starts with the statement. Read it properly, get to the effective rate, and the rest of the conversation gets a lot shorter.
Frequently asked questions
What is the effective rate on a card processing statement?
The effective rate is total card processing cost divided by total card volume, expressed as a percentage. It captures every line item on the statement — interchange, scheme fees, acquirer margin, terminal rental, PCI fees, everything — and gives the merchant a single number to evaluate their contract by.
What's the difference between interchange-plus and blended pricing?
Interchange-plus shows interchange, scheme fees and acquirer margin separately on the statement, so the merchant can see exactly what's going to whom. Blended rolls all three into a single rate. Interchange-plus is almost always cheaper and more transparent.
Can a UK acquirer reduce interchange?
No. Interchange is set by Visa and Mastercard and capped in the UK and EU by regulation. The only number an acquirer can actually negotiate is their own margin, which sits on top of interchange and scheme fees.
How much should a UK SME merchant pay in card processing fees?
A competitive UK SME card processing contract typically lands at an effective rate of 1.0% to 1.5% of card volume, depending on card mix, volume, and whether the merchant takes mostly card-present or card-not-present transactions. Effective rates above 2.0% almost always have a saving available.