Card machine transaction fees can look deceptively simple.
A provider might advertise a rate such as:
1.5% per transaction.
But behind that percentage can sit several different parts of the card-payment system, including:
- interchange;
- card-scheme fees;
- payment processing costs;
- the acquirer or provider's margin;
- fixed authorisation charges; and
- additional fees depending on the card or transaction.
The pricing model also matters.
A small business using a pay-as-you-go card reader may pay one simple blended rate, while a larger merchant may have negotiated interchange-plus or IC++ pricing where individual cost components are shown separately.
The useful question is therefore not just “What is my card machine transaction rate?” It is “How is that rate built, and what does my actual mix of transactions cost?”
This guide explains UK card machine transaction fees in 2026 and what established businesses should check when comparing merchant-service providers.
Key Takeaways
- There is no single standard UK card-machine transaction fee.
- A merchant's total transaction cost can contain interchange, scheme fees, processing costs and provider margin.
- UK domestic consumer interchange is capped at 0.20% for debit and 0.30% for credit where the UK Interchange Fee Regulation applies.
- Those interchange caps are not the merchant's total transaction rate.
- Commercial cards, international cards and transactions outside the scope of the UK interchange caps can have different underlying economics.
- Blended pricing combines costs into a simpler merchant rate.
- Interchange-plus separates interchange from the provider's pricing.
- IC++ generally exposes interchange, scheme costs and provider/acquirer pricing separately.
- Fixed per-transaction charges matter more when the average transaction value is low.
- Card mix can materially affect what two businesses with identical turnover actually pay.
- High-volume merchants should calculate their effective processing rate rather than compare one headline percentage.
- Transaction fees should still be reviewed alongside terminal rental, account fees, settlement, contracts and integrations.
Find Your New Processor
What Is a Card Machine Transaction Fee?
A card machine transaction fee is the charge associated with processing a customer's card payment.
It may be presented to the merchant as:
- a percentage of the transaction;
- a fixed pence amount;
- a percentage plus a fixed fee; or
- several underlying fee components.
The percentage charged to the merchant is sometimes described as the:
- merchant service charge;
- MSC;
- merchant discount rate;
- MDR;
- processing rate; or
- transaction rate.
Terminology varies between providers, so the merchant should establish exactly what a quoted percentage includes.
What Makes Up a Card Transaction Fee?
For a typical Visa or Mastercard transaction, the merchant's processing cost can be thought of in three broad layers.
| Cost Layer | What It Is |
|---|
| Interchange |
A fee typically paid through the acquiring chain to the cardholder's issuing bank |
| Scheme and processing fees |
Fees associated with the card scheme and the authorisation, clearing and settlement infrastructure |
| Acquirer / provider charge |
The commercial pricing applied by the merchant's acquiring or payment provider |
Depending on the provider and contract, those layers may be bundled together or shown separately.
MAS View
The headline transaction percentage tells you what you are charged. The pricing structure tells you why.
What Is Interchange?
Interchange is one component of many card-processing fees.
For most Visa and Mastercard transactions, the merchant's bank or acquirer pays interchange to the customer's card issuer through the card-payment system.
The Payment Systems Regulator explains that interchange normally forms part of the merchant service charge paid by the merchant.
Read the PSR's interchange guidance for merchants.
What Are the UK Interchange Fee Caps?
Where the UK Interchange Fee Regulation applies to domestic consumer card transactions, current interchange is capped at:
| Card | UK Interchange Cap |
|---|
| Consumer debit, including relevant prepaid cards |
0.20% |
| Consumer credit |
0.30% |
The Payment Systems Regulator confirms that these caps apply where the merchant, acquirer and card issuer are located within the UK and the transaction falls within the scope of the UK IFR.
See the Payment Systems Regulator's UK IFR guidance.
Important: This Is Not Your Card Processing Rate
A common misunderstanding is:
“If debit-card interchange is 0.20%, why am I paying substantially more than 0.20%?”
Because interchange is only one part of the cost.
The merchant's final price may also contain:
- scheme fees;
- processing fees;
- provider/acquirer margin;
- authorisation charges;
- terminal costs;
- account fees; and
- other services.
Visa itself explains that interchange is only one component of the wider Merchant Service Charge negotiated between the retailer and its acquiring bank.
Read Visa's explanation of interchange and merchant charges.
What Are Card-Scheme Fees?
Scheme fees are different from interchange.
They are fees charged in connection with participation in and use of card schemes such as Visa and Mastercard.
The Payment Systems Regulator distinguishes:
- scheme fees — fees associated with participation in the card scheme; and
- processing fees — fees associated with activities such as authorisation, clearing and settlement.
These fees can be complex and are not necessarily visible as one simple line on a merchant statement.
Why Are Scheme Fees Important in 2026?
Scheme and processing fees have been the subject of significant regulatory scrutiny in the UK.
The Payment Systems Regulator's final market review found that Mastercard and Visa had increased core scheme and processing fees charged to acquirers by at least 25% since 2017, which the regulator estimated was costing UK businesses at least £170 million extra per year.
The PSR also identified concerns about:
- competition;
- fee complexity;
- the quality of pricing information available to acquirers; and
- the ability to understand and reconcile charges.
In July 2026, the PSR issued new directions requiring Mastercard and Visa to improve transparency around scheme and processing fees and strengthen governance around pricing decisions.
See the PSR's current scheme and processing fee market review.
What Does This Mean for Merchants?
Most merchants do not negotiate scheme fees directly with Visa or Mastercard.
But these costs can form part of what an acquirer or payment provider ultimately needs to recover through merchant pricing.
That is another reason a headline provider margin should not always be interpreted as the entire cost of accepting a card.
What Is Blended Card Processing Pricing?
Blended pricing combines several underlying payment costs into a simpler merchant rate.
For example, a provider might charge:
1.5% per transaction.
The merchant does not necessarily see:
- interchange;
- scheme fees;
- processing costs; and
- provider margin
as separate components.
Instead, the provider bundles them into the agreed price.
Advantages of Blended Pricing
- simple to understand;
- predictable;
- easy to budget;
- often appropriate for smaller merchants; and
- can reduce the complexity of reading merchant statements.
Potential Disadvantages
- less visibility into underlying costs;
- harder to understand provider margin;
- businesses with favourable card mix may not fully benefit from cheaper underlying transactions; and
- larger merchants may have less ability to analyse changes in underlying payment costs.
What Is Interchange-Plus Pricing?
With interchange-plus — often written as IC+ — the provider typically separates the interchange cost from its agreed pricing.
A simplified representation might look like:
Interchange + provider charge.
The actual billing arrangement depends on the provider.
IC+ can give merchants greater visibility into how card mix affects costs.
What Is IC++ Pricing?
IC++ generally separates three broad cost components:
Interchange + scheme costs + provider/acquirer pricing.
This structure is commonly relevant to larger or more sophisticated merchants that want greater transparency into the underlying economics of card processing.
IC++ does not automatically mean a merchant will pay less.
Its major advantage is visibility.
The merchant can potentially see more clearly whether changes in cost result from:
- card mix;
- interchange;
- scheme fees;
- international transactions;
- commercial cards; or
- the provider's own pricing.
For a detailed comparison, see our guide to blended pricing vs IC+ and IC++.
Blended vs IC+ vs IC++
| Pricing Model | Visibility | Potential Fit |
|---|
| Blended |
Lower — costs bundled into simplified pricing |
Businesses prioritising simplicity and predictability |
| IC+ |
Greater visibility into interchange and provider pricing |
Established merchants wanting more cost transparency |
| IC++ |
Greater separation of interchange, scheme and provider costs |
Higher-volume or sophisticated merchants analysing payment economics |
None of these models is automatically best.
The correct comparison needs to use the merchant's real card mix and transaction profile.
Why Does Card Mix Affect Transaction Fees?
Two businesses can process exactly the same amount of card turnover and still have different payment costs.
That is because the underlying transactions may be different.
Relevant factors include:
- debit versus credit;
- consumer versus commercial cards;
- UK versus international cards;
- card-present versus card-not-present;
- card scheme;
- transaction value;
- authentication and transaction type; and
- the pricing model agreed with the provider.
Example
Consider two businesses that each process:
£250,000 per month.
Business A primarily accepts UK consumer debit cards in person.
Business B receives a substantial proportion of commercial and international cards.
Even with identical monthly turnover, their underlying card-processing economics can be materially different.
This is why merchants should avoid comparing provider quotations using only total turnover.
Do Commercial Cards Cost More?
They can.
Commercial cards are not necessarily subject to the same interchange caps that apply to qualifying UK domestic consumer cards.
Corporate and business card use can therefore materially affect the cost profile of merchants that receive a high proportion of these transactions.
This can be particularly relevant for:
- hotels;
- business travel;
- B2B retailers;
- wholesalers;
- professional services;
- corporate events;
- transport; and
- other businesses with significant corporate-card usage.
If commercial-card volume is significant, it should be separated within any fee analysis.
Do International Cards Cost More?
Potentially.
The cost structure for international cards can differ from domestic UK transactions.
Merchants should therefore ask providers to explain how pricing changes for:
- UK-issued cards;
- EEA-issued cards;
- cards issued outside the EEA;
- consumer cards;
- commercial cards; and
- different card schemes.
This can be particularly important for businesses in:
- hotels;
- tourism;
- airports;
- luxury retail;
- international hospitality; and
- businesses serving overseas customers.
What About American Express?
American Express should not automatically be analysed using the same interchange structure as a conventional Visa or Mastercard transaction.
The PSR notes that the typical interchange payment from acquirer to issuer described for Visa and Mastercard does not apply in the same way to American Express.
Merchants should therefore compare American Express acceptance and pricing separately where it represents a meaningful proportion of card turnover.
Why Do Fixed Transaction Fees Matter?
A small fixed transaction fee can have a very different impact depending on average transaction value.
Imagine a fixed charge of:
5p per transaction.
On a £100 transaction, 5p represents:
0.05%.
On a £5 transaction, the same 5p represents:
1%.
This means businesses with high transaction counts and low average tickets should pay particular attention to fixed authorisation or per-transaction charges.
This is an illustrative MAS calculation, not a market-rate example.
Businesses Where This Can Matter
- cafés;
- quick-service restaurants;
- bars;
- convenience retail;
- transport;
- ticketing;
- vending;
- low-value retail; and
- other high-frequency payment environments.
The MAS Effective Transaction Rate
For an established merchant, we prefer to look at what the business actually paid rather than relying only on the contracted headline rate.
A simple starting calculation is:
Total transaction-related processing charges ÷ total card turnover × 100
This gives an approximate:
effective transaction rate.
Example
If a business processes:
£400,000
and incurs:
£3,200 of transaction-related processing charges
the approximate effective transaction rate is:
£3,200 ÷ £400,000 × 100 = 0.80%.
This does not necessarily include terminal rental, PCI, gateway or other account charges.
Those belong within the wider total card-machine cost analysis.
Why Should Merchants Analyse Several Months?
One month can give a distorted picture.
Card mix may change because of:
- seasonality;
- tourism;
- corporate events;
- customer geography;
- promotions;
- transaction values; and
- changes in business activity.
For an established business, reviewing several months of statements usually provides a more useful view.
Where possible, analyse:
- total card turnover;
- transaction count;
- average transaction value;
- debit/credit mix;
- consumer/commercial mix;
- domestic/international mix;
- total transaction charges;
- fixed charges;
- refunds;
- chargebacks; and
- other recurring fees.
Should a Business Compare Rates Using One Example Transaction?
One worked example can be useful, but it is not enough for a larger merchant.
A provider might appear cheaper on:
one £100 UK consumer debit transaction
while being more expensive across:
- commercial cards;
- international cards;
- lower-value transactions;
- credit cards; or
- the merchant's overall monthly card mix.
For meaningful comparison, model the new quotation against actual historic transaction data wherever possible.
What Should a Card Machine Quote Show?
A useful quotation should make clear:
- the pricing model;
- consumer debit pricing;
- consumer credit pricing;
- commercial-card treatment;
- international-card treatment;
- fixed transaction charges;
- authorisation charges where applicable;
- refund charges;
- chargeback fees;
- terminal rental;
- monthly account fees;
- PCI-related fees;
- settlement;
- contract term; and
- other material charges.
If the quote is based on IC+ or IC++, ask how the provider presents changes in underlying interchange and scheme costs.
Use Your Merchant Statement and Summary Box
The Payment Systems Regulator introduced remedies following its card-acquiring market review to improve merchants' ability to understand and compare card-acquiring services.
For providers and merchants within the relevant scope, this includes summary-box information designed to make important price and non-price information easier to identify.
When reviewing your current arrangement, look for:
- transaction pricing;
- fixed charges;
- recurring fees;
- contract information;
- worked examples; and
- service information.
Do not rely only on the percentage shown on the original sales proposal.
How Much Difference Does 0.10% Make?
For a small merchant, 0.10% may not be commercially significant.
For a larger merchant, it can be.
| Monthly Card Turnover | 0.10% Difference Per Month | Approximate Annual Difference |
|---|
| £50,000 |
£50 |
£600 |
| £250,000 |
£250 |
£3,000 |
| £500,000 |
£500 |
£6,000 |
| £1,000,000 |
£1,000 |
£12,000 |
These are simple MAS calculations showing the effect of a 0.10 percentage-point difference. They do not represent expected provider savings.
MAS View
The larger the card volume, the more important small differences in basis points become — but only if the comparison is genuinely like for like.
Should High-Volume Merchants Negotiate Their Transaction Fees?
Absolutely worth reviewing.
A merchant that negotiated its contract when processing £100,000 per month may be in a very different commercial position after growing to £750,000 or £1 million per month.
Factors that may strengthen the merchant's position include:
- higher processing volume;
- stable processing history;
- predictable card mix;
- low dispute levels;
- strong financials;
- multiple business locations;
- larger terminal estate; and
- the ability to move meaningful volume to another provider.
See our guide to auditing payment fees for high-turnover businesses.
When Should a Merchant Consider Moving Away From Blended Pricing?
There is no fixed turnover at which every merchant should move to IC+ or IC++.
But a review becomes increasingly useful where:
- card turnover has grown substantially;
- the merchant wants greater cost transparency;
- card mix is complex;
- commercial-card usage is significant;
- international cards are material;
- the business operates across multiple markets;
- the provider's margin is difficult to identify; or
- payment costs have increased without a clear explanation.
Read our Blended vs IC+ and IC++ guide.
Transaction Fees Are Only Part of the Card Machine Cost
A transaction-rate saving is valuable only if the wider payment arrangement still works.
Also compare:
- terminal rental;
- hardware;
- settlement;
- PCI fees;
- monthly charges;
- contract length;
- exit terms;
- EPOS integration;
- support;
- reporting;
- terminal reliability; and
- future payment requirements.
A provider that saves 0.05% but creates additional integration, support or contract costs may not provide the lowest total cost.
See our Card Machine Costs UK 2026 guide.
What Should Multi-Site Businesses Compare?
Multi-location merchants should look at transaction pricing across the whole estate.
Consider:
- group-wide card turnover;
- location-level turnover;
- MID structure;
- number of terminals;
- card mix by site;
- international-card concentrations;
- commercial-card concentrations;
- central reporting;
- settlement structure;
- EPOS integration; and
- whether group volume can support stronger commercial terms.
A 50-location merchant should not necessarily negotiate payment pricing as though every store were a standalone small business.
Card Machine Transaction Fee Checklist
Before comparing a new provider, establish:
- monthly card turnover;
- transaction count;
- average transaction value;
- consumer debit percentage;
- consumer credit percentage;
- commercial-card percentage;
- international-card percentage;
- current pricing model;
- current provider margin where visible;
- fixed transaction charges;
- authorisation fees;
- scheme/interchange treatment;
- refund charges;
- chargeback fees;
- terminal costs;
- account fees;
- settlement;
- number of terminals;
- contract end date; and
- future processing growth.
Find Your New Processor
The MAS Card Transaction Fee Test
Rather than comparing one percentage, Merchant Advice Service would look at six areas.
1. Pricing Structure
Is the merchant paying blended, IC+, IC++ or another pricing model?
2. Card Mix
How much volume comes from consumer debit, consumer credit, commercial and international cards?
3. Fixed Charges
What authorisation or per-transaction fees apply and how do they interact with average ticket value?
4. Effective Rate
What percentage of actual card turnover is being consumed by transaction-related costs?
5. Commercial Position
Does the merchant's current volume and processing history justify reviewing provider margin or pricing structure?
6. Total Payment Cost
Does the apparent transaction saving remain a saving after terminal, account, settlement, integration and contract costs are included?
MAS View
The best transaction rate is not necessarily the lowest number on a quotation. It is the lowest sustainable cost for the merchant's actual card mix and payment requirements.
How Merchant Advice Service Compares Card Processing Fees
Merchant Advice Service helps established businesses understand and compare payment-provider pricing.
When reviewing transaction fees, we may consider:
- current provider;
- monthly and annual card turnover;
- transaction count;
- average transaction value;
- card mix;
- customer geography;
- pricing model;
- merchant statements;
- fixed transaction charges;
- terminal costs;
- settlement;
- contract terms;
- EPOS requirements;
- multiple locations; and
- future growth.
For current UK market context, see our UK Merchant Fees Benchmark 2026.
Businesses can also explore payment providers through The Payments Directory®.
Sources & Further Reading
Payment Systems Regulator — UK Interchange Fee Regulation
The PSR explains how interchange works and confirms the current UK domestic consumer caps of 0.20% for debit and 0.30% for credit where the regulation applies.
PSR — The IFR and Merchants
Payment Systems Regulator — Scheme and Processing Fees
The PSR's market review examined Mastercard and Visa scheme and processing fees, competition, pricing transparency and fee increases.
PSR — Card Scheme and Processing Fees Market Review
Payment Systems Regulator — Final Market Review
The PSR found that Mastercard and Visa had increased core scheme and processing fees to acquirers by at least 25% since 2017, costing UK businesses at least £170 million extra annually.
PSR — Final Scheme and Processing Fees Report
Visa — Interchange and Merchant Service Charges
Visa explains how interchange sits within the broader merchant service charge paid by retailers.
Visa — Interchange Fees
Mastercard — UK Interchange Rates
Mastercard publishes current UK interchange schedules and updates them when applicable rates change.
Mastercard — UK Interchange Rates
Related Merchant Advice Service Guidance
Editorial & Commercial Disclosure
Merchant Advice Service is an independent payments information, comparison and provider-matching service.
MAS may receive commission or a referral fee from some payment providers where a business chooses to proceed following an introduction. This does not determine the factual information or fee-comparison principles included in this article.
There is no single standard UK card-machine transaction rate.
Actual processing costs depend on factors including card mix, transaction volume, transaction values, pricing structure, provider, acquiring route, card origin and individual commercial terms.
The UK consumer interchange caps described in this article apply only to transactions within the scope of the UK Interchange Fee Regulation and should not be interpreted as merchant processing rates.
Commercial cards, international cards and transactions outside the scope of the relevant interchange caps may have different underlying costs.
MAS calculations in this guide are illustrative mathematical examples and should not be interpreted as expected savings or market-rate benchmarks.
Card-scheme fees, interchange rates, provider prices and regulatory requirements can change.
Merchant Advice Service does not guarantee provider pricing or merchant-account acceptance.
Fee and regulatory information last checked: 27 August 2026
This guide provides general payments information and should not be treated as legal, regulatory or financial advice.
