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Reading a UK merchant statement means working through five core sections: transaction summary, interchange and scheme fees, your processor's markup, fixed monthly charges, and any penalty or non-compliance fees. Each section uses different terminology depending on whether your provider is a bank-owned acquirer, a fintech like SumUp or Zettle, or a traditional merchant services company, but the underlying charges are broadly the same across every UK provider. Once you know what each line means, spotting an overcharge takes minutes rather than hours.
Key Takeaways
- Every UK merchant statement contains three cost layers: interchange fees (fixed by card schemes), scheme fees (set by Visa/Mastercard), and your processor's markup - only the last one is negotiable.
- Non-compliance fees, often £25-£35 a month, are charged for failing to complete a PCI DSS self-assessment questionnaire and can run for years unnoticed.
- A minimum monthly service charge means you pay a set fee (typically £15-£35) regardless of turnover, hurting seasonal and low-volume businesses hardest.
- Blended pricing statements hide the true cost of accepting different card types; interchange-plus statements break this down and are far easier to audit.
- Authorisation fees apply per transaction attempt, including declined transactions, so a business with a high decline rate can be paying more than the headline rate suggests.
- Your effective rate (total fees divided by total card turnover) is the single number that matters most and should be recalculated every quarter.
- Statements rarely explain themselves in plain English - if a line item is unclear, ask your provider directly or have it independently reviewed.
Why UK Merchant Statements Are So Hard to Read
Unlike a utility bill, a merchant statement is not standardised across the industry. Each acquirer and independent sales organisation (ISO) designs its own layout, uses its own abbreviations, and groups charges differently. A statement from Worldpay will look nothing like one from Elavon, Barclaycard, or a fintech provider such as Dojo or Teya. This lack of standardisation is not accidental - it makes side-by-side comparison difficult, which is exactly why many merchants never query their costs.
The good news is that despite the formatting differences, almost every UK statement is built from the same underlying components: interchange fees, scheme fees, acquirer margin, fixed charges, and penalty fees. Once you understand these five categories, you can decode almost any statement regardless of who issued it.
Section One: The Transaction Summary
At the top of most statements sits a summary table showing total sales volume, total transaction count, and total fees charged for the period. This is the headline number most business owners glance at before moving on - but it is also the least useful section for spotting problems, because it aggregates everything into one figure.
What to check in the summary
Divide total fees by total card turnover to calculate your effective rate. For a typical UK small business accepting mostly consumer debit and credit cards, a healthy effective rate sits between 0.4% and 0.9%. If your effective rate is above 1.2%, particularly on a card-present terminal setup, that is a strong signal you are being overcharged relative to market rates.
Section Two: Interchange Fees
Interchange is the fee paid to the cardholder's bank (the issuing bank) every time a card is used. These rates are set centrally by Visa and Mastercard and capped by UK and EU regulation - your acquirer has no control over this figure and cannot discount it. Since the 2015 EU Interchange Fee Regulation (still in force in the UK post-Brexit), consumer debit card interchange is capped at 0.2% and consumer credit card interchange at 0.3%.
Where interchange gets more expensive
Commercial cards, business cards, and cards issued outside the UK or EEA are not covered by the cap and can carry interchange fees of 1.5% to 2.5% or higher. If your customer base includes a lot of corporate cards or international tourists, this shows up as a higher blended rate even though your provider's own margin has not changed. This is one of the most common reasons a business's effective rate creeps up without any contract change - worth understanding alongside the detail in our debit vs credit card fees guide.
Section Three: Scheme Fees
Scheme fees are charged directly by Visa and Mastercard for the use of their network, separate from interchange. These appear on statements under names like "Visa Assessment Fee," "Mastercard Network Access and Brand Usage Fee," or simply "scheme fees." They are typically small individually - often a fraction of a percent - but they apply to every transaction and have risen steadily over the past five years.
Why scheme fees are often bundled and hidden
Many providers roll scheme fees into their overall percentage rate rather than itemising them, particularly on blended pricing plans. On an interchange-plus statement, however, scheme fees usually appear as their own line, which is one reason interchange-plus pricing is considered more transparent. For a full breakdown of terminology, see our authorisation, scheme and minimum fees guide.
Section Four: Acquirer Markup - The Only Negotiable Line
This is the fee your payment provider adds on top of interchange and scheme costs, and it is the only part of your statement that is genuinely negotiable. It may appear as a single "processing fee" percentage, a per-transaction fee, or - on interchange-plus statements - as a clearly separated markup, often expressed as "IC++" pricing.
Blended vs interchange-plus pricing
On a blended statement, interchange, scheme fees, and markup are combined into one flat percentage per card type, making it impossible to see what the provider is actually charging you. On an interchange-plus statement, each layer is itemised, so you can see the true markup your provider is applying. Most UK acquirers now offer interchange-plus pricing on request, and it is almost always worth insisting on it for turnover above roughly £10,000 a month.
| Pricing model | How it's shown on statement | Transparency | Typical UK use case |
|---|---|---|---|
| Blended | Single flat rate per card type (e.g. 1.75% all cards) | Low - markup is hidden inside the rate | Very small businesses, fintech card readers |
| Interchange-plus (IC++) | Interchange + scheme fee + separate markup, itemised | High - each cost layer is visible | Established SMEs, £10k+ monthly turnover |
| Tiered pricing | "Qualified," "mid-qualified," "non-qualified" bands | Very low - categorisation rules are opaque | Older legacy contracts, still common in hospitality |
Section Five: Fixed Monthly Charges
Below the transaction fees, most statements list a set of fixed charges that apply regardless of how much you process. These are the fees most likely to catch business owners off guard because they do not scale with turnover.
Common fixed charges to look for
- Minimum monthly service charge: if your transaction fees for the month fall below a set threshold (commonly £15-£35), the provider charges the difference. This disproportionately hurts seasonal businesses and anyone with a quiet December or January.
- PCI DSS non-compliance fee: charged monthly, usually £25-£35, until you complete a PCI compliance self-assessment questionnaire (SAQ) through your provider's portal. This is one of the most common "silent" charges on UK statements.
- Terminal rental: a fixed monthly cost, typically £15-£40 per terminal, that continues even if the terminal is rarely used.
- Statement or account fee: a small administrative charge, often £3-£10, for producing the statement itself.
- Authorisation fees: a small per-transaction fee (often 2p-5p) charged for every authorisation request sent to the card network - including declined transactions, which many merchants do not realise they are paying for.
Section Six: Chargeback and Refund Fees
Chargebacks and refunds are handled differently to standard transactions and usually carry their own fee, separate from the original processing charge. A chargeback fee - commonly £15-£25 in the UK - is charged whether or not you win the dispute, simply for the administrative cost of processing it. Refunds, by contrast, do not usually incur interchange or scheme fees being refunded to you, meaning a refunded transaction can end up costing you money even though no sale took place.
What a high chargeback line indicates
If this section shows a rising trend month on month, it is often a signal of a wider issue - fraud, unclear product descriptions, or delivery problems - rather than a processing cost issue. Persistent high chargeback ratios (generally above 1% of transactions for Visa, 1.5% for Mastercard) can trigger monitoring programmes and increased fees from the scheme itself, on top of what your acquirer charges.
Section Seven: Contract and Rate Change Notices
Many statements include a small print section - sometimes just a single line - noting rate changes, contract renewal dates, or amendments to terms. This is easy to miss because it is rarely highlighted, but it is where silent rate increases are disclosed. UK providers are required to give notice of price changes, but that notice often arrives buried within a statement rather than as a standalone communication.
Why this section matters at renewal
Contracts that auto-renew - typically on 12, 24, or 36-month terms - often carry a clause allowing the provider to adjust rates at renewal without renegotiation. If you have not checked your statement's notices section in over a year, there is a reasonable chance your rate has moved since you signed. This is closely tied to exit costs too; see our guide on early termination fees if you are considering switching provider.
Putting It Together: A Line-by-Line Reading Order
When you open your next statement, work through it in this order rather than reading top to bottom:
- Check the total transaction volume and count against your own sales records to confirm accuracy.
- Look for a minimum monthly fee charge - confirm whether it was triggered and why.
- Scan for any line containing "non-compliance," "PCI," or "SAQ" - this is pure margin for the provider and fully avoidable.
- Identify whether pricing is blended, tiered, or interchange-plus, as this determines how much visibility you actually have.
- Add up all fixed charges (terminal rental, statement fee, minimum fee) separately from percentage-based fees.
- Calculate your effective rate for the month and compare it to the previous quarter.
- Check the small print for any rate change notice or upcoming renewal date.
Benchmarking Your Rate Against the UK Market
Effective rates vary by business type, card mix, and processing method (card-present terminal vs e-commerce vs phone/mail order). As a general guide for 2024-2025, well-negotiated UK small business rates on interchange-plus pricing tend to fall within these ranges:
| Business type | Typical effective rate (card-present) | Typical effective rate (e-commerce) |
|---|---|---|
| Retail / high street | 0.4% - 0.7% | 0.6% - 1.0% |
| Hospitality / restaurants | 0.5% - 0.9% | 0.8% - 1.2% |
| Professional services | 0.5% - 0.8% | 0.7% - 1.1% |
| High-risk / subscription | 0.9% - 1.8% | 1.2% - 2.5% |
If your statement shows an effective rate materially above these bands for your sector, it is worth investigating why - either your card mix is unusual (high proportion of commercial or international cards), or your provider's markup is simply too high. Our guide to card processing fees by business type breaks this down further for specific sectors.
Common Statement Terms Explained
| Term on statement | What it means |
|---|---|
| MID | Merchant Identification Number - your unique account reference with the acquirer |
| MCC | Merchant Category Code - a classification that can affect interchange rates applied |
| IC++ / IC+ | Interchange-plus pricing - itemised interchange, scheme fee, and markup |
| Non-qualified | A tiered pricing category for transactions charged the highest rate band, often applied to card-not-present or rewards cards |
| Settlement | The transfer of your card sales funds into your bank account, usually 1-3 business days after the transaction |
| Batch fee | A small charge for closing and submitting a day's transactions for settlement |
For a full A-Z of terminology used across UK statements and contracts, our card processing fees glossary covers every term in plain English.
When to Get a Second Opinion
If you have gone through your statement and found unfamiliar line items, an effective rate that seems high for your sector, or fixed charges that have crept up since you signed, it is worth having the statement independently reviewed rather than guessing. Providers are not obliged to proactively explain their own charges in simple terms, and switching costs are often lower than business owners assume - particularly once a contract's minimum term has passed. If you are unsure whether you're overpaying, comparing your current statement against live UK market rates is the fastest way to find out, and our guide to negotiating lower fees gives scripts you can use directly with your existing provider before switching anywhere.
Frequently Asked Questions
What is the most important number on my merchant statement?
Your effective rate - total fees divided by total card turnover for the period - is the single most useful figure because it captures every charge in one comparable number. Track it quarterly and compare it against typical UK benchmarks for your sector to spot creeping costs early.
Why do I see a non-compliance fee every month?
This charge, usually £25-£35, is applied because you have not completed a PCI DSS self-assessment questionnaire through your provider's online portal. It typically takes 15-20 minutes to complete and, once submitted and approved, the fee should stop appearing on your next statement.
What is the difference between interchange fees and my provider's markup?
Interchange is set by Visa and Mastercard and paid to the cardholder's bank - your provider cannot change or discount this. The markup is the fee your provider adds on top for their own service, and it is the only element of your total cost that is genuinely negotiable.
Why does my statement show a fee for declined transactions?
Authorisation fees, typically a few pence per attempt, are charged for every transaction sent for approval regardless of the outcome. A business with a high volume of declined cards - common in subscription or recurring billing models - can accumulate meaningful costs from this line over a year.
Should I switch from blended to interchange-plus pricing?
For most established UK businesses processing more than roughly £10,000 a month, interchange-plus pricing offers far greater transparency and usually a lower overall cost once negotiated properly. Very small or seasonal businesses sometimes find blended pricing simpler to manage, but it typically carries a higher hidden margin.
How do I know if my rate has increased without me being told?
Compare your effective rate from your most recent statement against one from 12 months ago using the same calculation method. If it has risen and you cannot identify a change in your card mix (more commercial or international cards), the increase is most likely coming from your provider's markup.
Is it worth paying for terminal rental or should I buy a terminal outright?
Terminal rental typically costs £15-£40 a month, which adds up to £180-£480 a year, often more than the cost of purchasing a terminal outright over a similar period. If you have been with the same provider for several years, ask what an outright purchase or a lower-cost alternative device would cost compared to your ongoing rental fee.
How Compare Card Fees Can Help
Compare Card Fees is a free, independent advisory service. We compare rates from leading UK payment providers to find you the best deal available - no fee, no obligation.
Whether you are looking to reduce your card processing costs, switch provider, or understand what you are currently paying, our experts can help. Tell us about your business and we will find the best rates available.
