Why merchant statements are so hard to read
A typical UK merchant statement bundles transaction rates, interchange pass-through, scheme fees, terminal hire, PCI compliance, authorisation fees and a handful of smaller line items into a single monthly invoice. The document is written for the acquirer's back office, not the business owner, and the headline rate quoted when you signed is rarely the rate you actually pay.
Every UK acquirer — Worldpay, Barclaycard, Elavon, Global Payments, Lloyds Cardnet, Dojo, Teya and the rest — presents the same underlying costs differently. Some group interchange, scheme fees and acquirer margin into a single blended percentage; others itemise them line by line. Neither format is inherently better, but both can obscure what you are actually paying.
The goal of this guide is simple: give you a repeatable way to read any UK merchant statement in ten minutes, calculate your true cost of acceptance, and know which specific lines to challenge if the numbers look wrong.
Unsure what these charges mean on your own statement? Submit it for a free independent review.
Check If I'm OverpayingThe anatomy of a UK merchant statement
Almost every statement, regardless of acquirer, contains the same six blocks of information. Once you know what to look for, the layout stops mattering.
- ●Header summary — MID (merchant ID), statement period, total turnover, total fees, net settled amount.
- ●Transaction volume breakdown — number and value of transactions, split by card type (consumer debit, consumer credit, commercial, international, Amex).
- ●Processing charges — the percentage and per-transaction rates applied to each card category.
- ●Interchange and scheme fees — on Interchange Plus (IC+) accounts, itemised pass-through from Visa and Mastercard; on blended accounts, folded into the headline rate.
- ●Service and equipment charges — terminal hire, PCI compliance, minimum monthly service, authorisation fees, gateway fees, chargeback admin.
- ●Adjustments — refunds, chargebacks, rolling reserve movements, non-compliance surcharges.
Every line item, explained in plain English
Below are the fees you are most likely to see on a UK merchant statement, what each one is for, and roughly what a competitively priced business currently pays. Rates change; use these as sanity-check bands, not quotes.
| Line item | What it is | Typical UK range |
|---|---|---|
| Consumer debit rate | Percentage charged on standard UK personal debit cards. | 0.30% – 0.90% |
| Consumer credit rate | Percentage on UK personal credit cards; regulated interchange caps at 0.30%. | 0.65% – 1.60% |
| Commercial card rate | Business, corporate and purchasing cards. Not covered by the interchange cap. | 1.60% – 2.90% |
| Non-EEA / international | Cards issued outside the UK & EEA; higher interchange and scheme fees apply. | 1.90% – 3.20% |
| Authorisation fee | Per-transaction fixed fee to route the authorisation request. | 1p – 5p |
| Scheme fees (Visa/MC) | Pass-through charges from the card networks — APF, VBP, cross-border, kilobyte fees etc. | 0.03% – 0.15% blended |
| Terminal rental | Monthly hire per PDQ / countertop / portable device. | £12 – £35 per unit |
| PCI compliance (admin) | Annual or monthly fee to administer PCI DSS self-assessment. | £3 – £6 / month |
| PCI non-compliance | Punitive fee if the annual SAQ is not completed on time. | £15 – £35 / month |
| Monthly minimum service charge | Top-up if processing fees fall below a stated floor. | £15 – £25 / month |
| Chargeback admin fee | Per-case fee applied to disputed transactions. | £10 – £25 per case |
| Gateway fee (ecom) | Monthly and/or per-transaction charge for the online payment gateway. | £10 – £25 / month + 1–3p per txn |
Interchange, scheme fees and acquirer margin: the three costs behind every rate
Every card payment you accept in the UK has exactly three underlying costs: interchange (paid to the card issuer), scheme fees (paid to Visa or Mastercard) and the acquirer margin (paid to your provider for authorising, clearing and settling the transaction). Everything on your statement is a repackaging of these three things plus fixed services.
Interchange is regulated in the UK. Consumer debit cards are capped at 0.20% and consumer credit cards at 0.30% under the Interchange Fee Regulation. Commercial cards, cross-border transactions and card-not-present premium categories are not capped and can run materially higher.
Scheme fees are Visa's and Mastercard's own charges — assessment fees, cross-border fees, kilobyte fees, Visa Base II, Mastercard NABU, Visa Behaviour Programme, Integrity Fees and so on. They have grown steadily since 2016 and now sit at roughly 0.05% – 0.15% blended for most UK SMEs.
Acquirer margin is what your provider actually earns. On an IC+ statement it is a stated basis-point figure (for example, interchange + 0.25% + 2p). On a blended statement it is buried inside the headline rate.
How to calculate your true effective rate
The single most useful number on your merchant statement is your effective rate: total card-related fees divided by total card turnover, expressed as a percentage.
This is the number to compare against any quote you're offered, not the headline percentage. A 0.65% headline rate is meaningless if PCI, terminal hire, minimums and authorisation fees push your effective rate to 1.9%.
Red flags to look for on your own statement
Non-compliance fees repeating
A £15–£35 monthly PCI non-compliance charge that has recurred for months usually means the annual SAQ was never completed. It's fixable in an afternoon.
Multiple terminal lines
A terminal you returned or replaced but that still appears as a rental line. Cross-reference the serial numbers against your active hardware.
Minimum monthly top-ups
If you're regularly being topped up to a floor, either your volume has dropped or the minimum was set unrealistically high on day one.
Commercial card creep
A rising share of commercial-card transactions on a blended contract can quietly push your effective rate up by 30–60 bps with no change on your side.
Cross-border surcharges
If you take international cards but were sold as a UK-only merchant, cross-border fees may not have been priced into your headline rate.
Annual rate reviews
Some contracts allow the acquirer to increase pricing once a year. Compare month 1 and month 13 side by side.
How to review your own merchant statement in 10 minutes
A repeatable walk-through you can apply to any UK merchant services statement, regardless of acquirer.
- 1
Find the totals
Locate total card turnover and total fees for the month on the summary page. Ignore VAT for now; work from net figures.
- 2
Calculate your effective rate
Divide total fees by total turnover and multiply by 100. Write it down. This is your comparison number.
- 3
Break out fixed costs
Add up terminal hire, PCI, minimums and gateway fees separately. These stay the same whether you process £5k or £50k, so they hurt low-volume months disproportionately.
- 4
Check card-mix percentages
Look at what share of your volume is commercial or international. Above 15% commercial on a blended rate is usually a review trigger.
- 5
Scan for non-compliance and adjustments
Any recurring penalty fee is a quick win — complete the SAQ and it stops.
- 6
Compare month-on-month
Pull three months side by side. Fees that trend upward without a volume change are the ones to challenge.
Frequently asked questions
What is a good effective rate for a UK small business?
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Why do my scheme fees keep going up?
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Is Interchange Plus always cheaper than blended?
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Can I refuse to pay PCI non-compliance fees?
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Do I get charged for refunds?
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Key takeaways
- ●Always calculate your effective rate; never rely on the headline percentage alone.
- ●Interchange, scheme fees and acquirer margin sit behind every rate on your statement.
- ●Terminal hire, PCI and minimum charges disproportionately hurt low-volume months.
- ●Recurring PCI non-compliance charges are almost always a quick self-service fix.
- ●A rising share of commercial or international cards silently inflates blended pricing.