Merchant Account Fees Explained: What Are You Actually Paying For?
The cost of accepting card payments is rarely explained by one percentage.
A merchant account quote might show a transaction rate such as 1.2%, while another provider quotes interchange plus a margin. A third might offer a simple fixed price.
Those figures cannot always be compared directly because the total cost of accepting payments can include several separate charges.
Depending on the provider and payment setup, a business may pay for:
- Card processing or merchant service charges
- Interchange
- Card scheme and processing fees
- Acquirer or payment-provider margin
- Fixed transaction or authorisation charges
- Payment gateway fees
- Card terminal rental
- Monthly account charges
- PCI-related fees
- International and cross-border cards
- Currency conversion
- Refunds and chargebacks
- Settlement or additional service fees
This guide explains what the main merchant account fees mean, which costs businesses may be able to negotiate and how to compare payment-provider quotes properly.
If you are looking for current UK cost benchmarks rather than an explanation of the individual fees, see our UK Merchant Fees Benchmark.
Find Your New Processor
What are merchant account fees?
Merchant account fees are the charges associated with accepting, processing and settling card payments.
The core cost of acquiring a card payment is generally built from several layers:
- Interchange – an underlying card cost associated with the card issuer.
- Scheme and processing fees – costs connected with the card networks and processing infrastructure.
- Acquirer or provider margin – the commercial amount charged by the merchant's payment provider.
Other services can then sit alongside these costs, including gateways, terminals, authorisations, reporting, fraud tools and monthly account charges.
This is why the cheapest-looking transaction percentage does not necessarily produce the lowest total payment cost.
Merchant-account pricing is only one part of the payment-provider relationship. Businesses should also consider underwriting, settlement, technology, payment channels and contract requirements. Our main Merchant Accounts guide explains how the wider merchant-account setup fits together.
What merchant account fees might appear on your statement?
| Fee | What it relates to |
|---|
| Merchant service charge |
The core charge for processing card transactions. Depending on the pricing model, underlying costs and provider margin may be bundled together or shown separately. |
| Interchange |
An underlying card cost generally paid by the acquirer to the cardholder's issuer. |
| Scheme and processing fees |
Charges connected with the card networks and functions such as authorisation, clearing and settlement. |
| Provider or acquirer margin |
The commercial pricing retained by the provider for supplying acquiring and related services. |
| Fixed transaction fee |
A fixed amount charged alongside or instead of a percentage rate. |
| Authorisation fee |
A charge associated with submitting a payment request for approval. |
| Gateway fee |
The cost of the technology used to transmit online or integrated payment information. |
| Terminal rental |
The cost of renting physical card machines. |
| Monthly account fee |
A recurring account, service, dashboard or reporting charge. |
| PCI fee |
A provider charge associated with PCI compliance administration or services. |
| Chargeback fee |
An administration charge when a card transaction is disputed. |
| International / cross-border fee |
Additional costs that can arise where cards, customers, merchants or acquiring arrangements cross different markets. |
| FX fee |
The cost or margin associated with converting or settling currencies. |
Not every merchant will pay every fee and providers package charges differently. The important point is to understand what is included in the quoted rate and what is charged separately.
What is the merchant service charge?
The merchant service charge, often shortened to MSC, is the core amount a merchant pays for card-acquiring services.
Depending on the commercial structure, it might be shown as:
- One blended percentage
- Different debit and credit card rates
- A percentage plus a fixed transaction fee
- Interchange plus a provider margin
- Interchange and scheme fees plus a separate provider markup
The merchant service charge should not automatically be treated as the merchant's complete cost of accepting payments.
Gateway charges, terminal rental, authorisation fees, monthly charges and other services may sit outside it.
What are interchange fees?
Interchange is an underlying component of card-processing cost and is generally paid by the merchant's acquirer to the customer's card issuer.
For certain UK domestic consumer-card transactions where the UK Interchange Fee Regulation applies, consumer interchange is subject to caps.
These headline interchange caps should not be confused with the total amount a merchant can be charged for processing a transaction.
Commercial cards, international cards and other transactions can have different underlying costs.
We cover this subject separately in our Interchange Fees Explained guide, including UK rates and IC+ and IC++ pricing.
What are card scheme fees?
Scheme and processing fees are another part of the underlying cost of card acceptance.
They are different from interchange and can cover different elements of operating and processing transactions across card networks.
The exact structure can be complex and merchants using pass-through pricing may see more of these costs individually than a merchant on a blended rate.
Rather than duplicating the detailed fee schedules here, our dedicated Card Scheme Fees UK guide explains the Visa and Mastercard cost layer in more detail.
What is the payment provider's margin?
The payment provider or acquirer needs to charge for providing its service.
Its commercial margin can appear in different ways, including:
- A percentage of each transaction
- A fixed amount per transaction
- A percentage plus a fixed fee
- A monthly charge
- A margin built into a blended rate
This is one of the areas merchants may have greater scope to negotiate, particularly where the business has meaningful processing volume or a strong trading history.
Provider pricing can be affected by:
- Monthly and annual card turnover
- Number of transactions
- Average transaction value
- Business sector
- Card-present versus online payments
- Consumer versus commercial cards
- UK versus international cards
- Chargeback and refund history
- Settlement requirements
- Technology and integrations
- Contract structure
For businesses processing significant card volumes, small differences in provider margin can become commercially meaningful.
What are authorisation fees?
An authorisation happens when a payment request is submitted to determine whether the transaction should be approved.
Some providers include this within their main price while others charge a fixed amount for authorisation activity.
Businesses should establish whether a fixed charge applies to:
- Successful transactions only
- Every authorisation attempt
- Declined payments
- Recurring-payment retries
- Card verification
- Other transaction events
This is especially important for merchants processing a high number of low-value transactions or businesses using subscription and recurring-payment models.
What are payment gateway fees?
A payment gateway is the technology layer used to transmit payment information between a checkout, software platform and the wider payment-processing infrastructure.
Gateway pricing can potentially include:
- A monthly platform fee
- A fixed fee per transaction
- A percentage charge
- Minimum monthly commitments
- Fraud tools
- Tokenisation
- Recurring-payment functionality
- Reporting
- Additional currencies or merchant IDs
Some providers bundle acquiring and gateway services together. Others allow the merchant to use a separate gateway and acquirer.
If online or integrated payments make up a significant part of your business, see our dedicated Payment Gateway Fees guide and the main Payment Gateways hub.
What are card machine and terminal fees?
Businesses accepting face-to-face payments may have a separate contract for their card terminals.
Potential costs can include:
- Terminal rental
- Terminal purchase
- Connectivity or SIM charges
- Installation
- Additional terminals
- EPOS integration
- Replacement equipment
- Contract termination
A lower transaction rate can therefore be offset by expensive terminal or contractual costs.
It is also important to check whether the terminal contract and card-acquiring contract are separate agreements.
What are monthly and minimum service charges?
Providers can charge recurring fees in addition to transaction pricing.
These may cover:
- Merchant account access
- Statements
- Reporting
- Support
- Dashboards
- Additional merchant IDs
- Additional locations
A minimum monthly service charge works slightly differently.
For example, if a merchant has a £30 minimum processing charge but generates only £20 of qualifying transaction fees, the provider may charge another £10 to reach the contractual minimum.
Businesses with low or seasonal card turnover should pay particular attention to fixed and minimum charges because they can materially increase the effective cost of accepting payments.
What are PCI-related charges?
PCI DSS applies to businesses involved in accepting payment-card data.
A payment provider may separately charge for PCI-related administration or compliance services.
Possible charges include:
- PCI administration fees
- Compliance-management services
- Security scanning
- Non-compliance charges
A provider fee does not replace the merchant's responsibility to understand its own PCI obligations.
What are chargeback and refund fees?
A provider may charge an administration fee when a cardholder disputes a payment through the chargeback process.
This is separate from the value of the disputed transaction itself.
Some providers also charge for processing refunds while others include refund processing within the commercial package.
Businesses with higher dispute levels should look at both:
- The cost of chargebacks
- The operational and underwriting impact of excessive disputes
Why do international and commercial cards cost more?
The cost of processing a transaction can vary according to the type and origin of the card.
A merchant's card mix might include:
- UK consumer debit cards
- UK consumer credit cards
- Commercial and corporate cards
- EEA-issued cards
- Cards issued elsewhere internationally
These transactions do not necessarily carry the same underlying payment costs.
This matters particularly for:
- Hotels
- Travel businesses
- International ecommerce
- Software and SaaS businesses
- Luxury retailers
- Education providers
- B2B merchants accepting commercial cards
A provider quote based on predominantly UK consumer debit cards may not accurately represent the cost of a business with a large international or commercial-card mix.
Compare Payment Providers
Blended, fixed, IC+ and IC++ pricing explained
The pricing model determines how the different costs appear to the merchant.
Blended pricing
Under blended pricing, several underlying costs and the provider's margin are combined into a simpler transaction rate.
The advantage is simplicity. The disadvantage is that the merchant may have less visibility over exactly what is driving the final cost.
Fixed pricing
Some payment services use simple fixed commercial pricing, for example a percentage and fixed amount per transaction.
This can be easy to budget for but does not necessarily mean it is the lowest-cost structure for every merchant.
IC+ pricing
Interchange Plus separates interchange from the provider's commercial pricing.
This gives the merchant more visibility over underlying transaction costs than a single blended rate.
IC++ pricing
IC++ typically separates interchange, scheme-related costs and the provider's commercial margin more clearly.
This can make payment costs easier to analyse, particularly for merchants with substantial card volumes and varied transaction mixes.
However, greater transparency does not automatically mean the overall price is cheaper.
Read our detailed guides to Blended Pricing and when higher-turnover businesses should consider IC+ or IC++.
Which merchant account fees can be negotiated?
Not every cost in the payment chain is controlled by the merchant's provider.
That distinction matters when negotiating.
| Cost | Negotiation position |
|---|
| Underlying interchange |
Generally not individually negotiated by the merchant with its provider. |
| Underlying scheme costs |
Generally set within the card-network structure rather than by the individual merchant. |
| Provider / acquirer margin |
Often commercially negotiable. |
| Fixed transaction charges |
May be negotiable depending on provider and volume. |
| Gateway pricing |
Can often be negotiated, particularly at scale. |
| Terminal costs |
Provider and contract dependent. |
| Monthly account fees |
May be negotiable or bundled. |
| Settlement terms |
Can sometimes be commercially negotiated depending on the merchant. |
| Contract length |
Should be compared and negotiated where possible. |
The biggest mistake is asking a provider simply:
“Can you reduce my rate?”
A better negotiation starts by understanding which part of the price is underlying cost and which part is the provider's commercial margin.
How should you compare merchant account quotes?
Compare quotes on a pound-for-pound basis using your actual transaction profile.
If you already process cards, provide the competing supplier with enough information to model:
- Total monthly card turnover
- Transaction count
- Average transaction value
- Debit versus credit mix
- Consumer versus commercial cards
- UK versus international cards
- Online versus face-to-face payments
- Current gateway costs
- Terminal requirements
- Monthly account fees
For established merchants, recent processing statements are usually much more useful than comparing advertised headline rates.
Our Compare UK Payment Providers guide covers the wider factors businesses should consider alongside price.
How do you calculate your effective card-processing rate?
A useful starting calculation is:
Total recurring payment-processing costs ÷ total card turnover × 100
For example:
- Monthly card turnover: £100,000
- Total recurring payment costs: £1,250
The effective cost would be:
£1,250 ÷ £100,000 × 100 = 1.25%
This is often more useful than looking at one transaction rate because it captures the effect of additional recurring charges.
Keep exceptional one-off costs, such as installation or early termination, separate so they do not distort the normal monthly rate.
Why average transaction value matters
Fixed transaction fees affect merchants differently depending on average ticket size.
A 10p fixed charge represents:
- 1% of a £10 transaction
- 0.1% of a £100 transaction
- 0.02% of a £500 transaction
This is why two businesses processing the same annual card turnover can have very different payment economics.
A coffee shop processing thousands of low-value payments may care more about the fixed transaction charge than a business processing relatively few high-value transactions.
Should larger businesses pay differently?
As card turnover grows, businesses generally have more data and greater commercial leverage when reviewing provider pricing.
Larger merchants should look beyond one headline percentage and review:
- Provider margin
- Interchange and scheme-cost visibility
- Authorisation charges
- Gateway pricing
- Commercial and international-card mix
- Cross-border costs
- Settlement
- Authorisation performance
- Contract structure
For businesses processing more substantial volumes, our High-Turnover Payment Fee Audit guide explains how to analyse payment costs at a more detailed level.
When should you review merchant account fees?
Businesses should not assume that the pricing agreed several years ago remains competitive today.
A review may be worthwhile where:
- Card turnover has increased significantly
- Average transaction values have changed
- The business has expanded internationally
- More customers now use commercial cards
- The business has moved from face-to-face to ecommerce
- New monthly or gateway charges have appeared
- The merchant has reached the end of a contractual period
- The provider has changed pricing
- The business has not benchmarked its costs for some time
The Payment Systems Regulator introduced card-acquiring remedies designed to make it easier for many UK merchants to understand costs and consider switching, including summary information boxes and restrictions affecting certain POS terminal contracts.
Our guide to the Card Payments Summary Box explains how merchants can use this information when reviewing their provider.
Is the cheapest merchant account always the best?
No.
Cost matters, but the payment provider also needs to work for the business.
Merchants should consider:
- Provider acceptance and underwriting
- Payment gateway compatibility
- Card machine and EPOS integrations
- Settlement times
- Customer support
- Reporting and reconciliation
- International capabilities
- Recurring-payment support
- Fraud controls
- Contract flexibility
A cheaper payment provider can become expensive if it causes integration problems, poor reporting, weaker payment performance or operational disruption.
How Merchant Advice Service helps businesses compare merchant account fees
Merchant Advice Service helps UK businesses understand their payment requirements before comparing payment providers.
Where a merchant already takes card payments, this can include reviewing:
- Existing processing statements
- Current transaction pricing
- Fixed and monthly charges
- Payment channels
- Transaction volumes
- Average transaction values
- Card mix
- Gateway or software requirements
- Settlement
- Contract considerations
MAS does not recommend choosing a provider from one advertised percentage alone.
The objective is to understand the business's actual payment profile and compare the complete commercial and technical proposition.
Merchant Advice Service view
The most useful question to ask about merchant account fees is not:
“What percentage am I paying?”
It is:
“What is the total cost of accepting my actual mix of payments, and which parts of that cost can I change?”
Understanding that distinction makes it easier to compare payment providers properly, identify unnecessary charges and negotiate the parts of the payment cost that are genuinely commercial.
Related Merchant Advice Service guides
Sources and further information
Editorial and commercial disclosure
Merchant Advice Service provides independent information about merchant accounts, payment providers and payment technology. We may receive commission where a business is introduced to a payment provider and subsequently becomes a customer. This does not affect the price paid by the merchant.
Payment-provider pricing varies according to the individual business, transaction profile, card mix, processing volume, payment channel, risk, technical requirements and commercial agreement. Examples used in this guide are illustrative and should not be treated as universal UK pricing benchmarks.
Final pricing, underwriting, contractual terms and service availability are determined by the individual payment provider.
Find Your New Processor
