If you are comparing card machines for your shop, the first price you see is rarely the full story.
One provider advertises a low transaction rate. Another promises no monthly fees. A third makes the hardware look cheap, but the ongoing payment charges are less attractive once your sales volume grows. For UK retailers, the real cost of taking card payments usually sits across several moving parts, not just the machine on the counter.
That matters because card payments are now central to everyday retail. UK Finance’s card expenditure data shows there were 3.905 billion retail card transactions in the UK in Q2 2025, worth £102.9 billion, while contactless alone accounted for 4.931 billion transactions worth £79.3 billion across the wider market.
So, if you are choosing a payment setup for a convenience store, off licence, vape shop, deli, or independent retail business, it is worth understanding what card machine fees in the UK actually include, what retailers often miss, and how to compare costs properly.
What Are Card Machine Fees in the UK?
Card machine fees are the costs a retailer pays to accept debit card, credit card, contactless, and digital wallet payments.
These fees usually include one or more of the following:
- a fee on each transaction
- the cost of buying or renting the card machine
- monthly service or software costs
- payment processing charges
- chargeback or admin costs
- add-on costs linked to POS or EPOS tools
In other words, the machine itself is only one part of the expense. The real question is what sits behind it.
Some UK providers keep pricing simple on the surface. Zettle says it charges 1.75% per card transaction with no long-term commitments or rental fees, while SumUp advertises UK pricing from 0.99% in some plans and also offers a pay-as-you-go card reader model with 1.69% per transaction and no monthly cost.
That is why retailers should never compare card machines by hardware price alone.
Why Card Machine Fees Matter More Than Retailers Think
A card fee may look small in isolation. But in retail, small percentages add up very quickly.
If your shop is processing card payments all day, every day, even a modest difference in transaction pricing can have a noticeable effect on margin over a month or a year. That is especially true for convenience stores and other lower-margin businesses, where payment acceptance is necessary but cost control is still vital.
It is also important because payment behaviour in the UK continues to lean heavily towards cards and contactless. UK Finance’s Q2 2025 data shows that retail card use remains extremely high, which means payment fees are not a minor side issue for retailers. They are part of the core cost of trading.
For a small retailer, the right question is not simply, “Which card machine is cheapest?” It is, “Which payment setup gives me the best overall value for the way my shop trades?”
The Main Types of Card Machine Fees Retailers Pay
To compare providers properly, it helps to break the cost down into parts.
Transaction fees
This is the fee charged on each card sale.
In many small-business payment setups, this is expressed as a flat percentage of every transaction. For example, Zettle’s UK pricing page lists 1.75% per card transaction, while SumUp says in-person transaction fees can be as low as 0.99% on some plans and 1.69% on its pay-as-you-go card reader option.
This is the figure retailers tend to focus on first, and understandably so. But it should not be the only one.
Terminal or hardware cost
Some retailers buy the card machine outright. Others choose a bundled setup or pair the terminal with a wider POS system.
The cost here can vary depending on whether you need:
- a simple mobile card reader
- a standalone terminal
- a countertop device
- a payment terminal integrated with your till or EPOS system
Hardware is usually easier to compare than payment fees, but it still matters. A lower-cost device may be perfectly fine for a mobile trader or occasional seller, but a busier retail counter may need something more robust.
Monthly service or software fees
Some payment providers charge no monthly fee at all on entry-level plans. Others add a monthly subscription in return for lower transaction fees or wider business tools.
For example, SumUp’s UK card reader page shows a pay-as-you-go option with a 1.69% fee and £0 monthly cost, while its Payments Plus model is listed at 0.99% transaction fee with a £19 monthly fee.
This is a good example of how “cheaper” can depend on sales volume. A monthly plan may reduce overall cost if your card turnover is high enough.
POS or EPOS-related costs
Some retailers use a standalone card machine. Others want the payment setup linked directly to their till system.
Once payments are tied into POS or EPOS, the cost picture often widens to include:
- software subscriptions
- reporting tools
- stock control
- staff permissions
- integrated checkout workflows
Shopify, for example, positions in-person payments as part of a wider commerce and POS setup, with in-person payment fees varying by plan. A recent Shopify article explains in-person payments on its plans at rates such as 2.6% + 10¢, 2.5% + 10¢, and 2.4% + 10¢ depending on plan tier.
The key point is that a card machine fee should often be compared alongside the wider checkout system, not in isolation.
Chargebacks and disputes
A chargeback happens when a cardholder disputes a payment. Retailers should always ask what the provider’s process is here and whether there are admin costs or penalties involved.
Even if this is not a daily issue, it is part of the true payment risk profile.
Refund-related costs
Retailers should also check how refunds are handled. Some providers keep pricing simple, while others have operational limitations or leave the original transaction cost unrecovered.
That may not look important on day one, but it matters over time in shops with regular returns or disputed purchases.
How Card Transaction Fees Work in the UK
Card transaction fees in the UK are usually charged in one of two broad ways.
Flat-rate pricing
This is common for small retailers and new businesses.
It is simple: you pay the same percentage on each eligible transaction. That makes budgeting easier and removes some of the complexity around card type or turnover banding.
Zettle explicitly presents its UK pricing in a flat and transparent way, charging 1.75% per card transaction and noting that there are no long-term commitments or rental fees.
This type of model tends to suit:
- smaller shops
- lower or unpredictable monthly card turnover
- businesses that want simple pricing
- retailers who value flexibility over bespoke rate negotiation
Subscription-plus-lower-rate pricing
Some providers offer a second model where you pay a monthly fee in return for a reduced transaction rate.
SumUp’s UK pricing is a clear example: its site shows a pay-as-you-go route at 1.69% and a Payments Plus plan at 0.99% with a £19 monthly fee.
This model may suit:
- busier shops
- businesses with steady card volume
- retailers who want to reduce fee percentage without moving to a full bespoke merchant account
Custom or tailored pricing
At a higher transaction volume, providers often move away from one-size-fits-all pricing.
SumUp says businesses processing £10,000 or more a month can access bespoke rates and flexible terms, and Zettle says merchants taking over £10,000 in card payments each month may be eligible for a custom rate plan.
That means retailers with stronger volume should not assume the standard website rate is their final option.
Card Machine Fees vs Merchant Fees: What Is the Difference?
Retailers often use these terms interchangeably, but there is a small difference in how they are understood.
Card machine fees usually refers to the practical day-to-day cost of taking payments through the device.
Merchant fees is a broader term. It can include:
- transaction charges
- account-related fees
- gateway or processing costs
- settlement structure
- broader payment service costs
In simple terms, card machine fees are often the visible front-end cost, while merchant fees may describe the wider payment relationship behind the scenes.
For many small retailers, that distinction is not crucial. What matters is understanding the full fee structure before signing up.
Do Different Payment Types Cost Different Amounts?
Sometimes yes, sometimes no. It depends on the provider.
Some payment providers simplify their pricing by charging the same transaction fee across major card brands and digital wallets. Zettle says it applies the same fee for major cards and mobile wallets, including American Express.
Others use more varied pricing. SumUp’s UK pricing page states that in-person debit and credit card payments can be 0.99% on certain plans, while American Express and premium cards are charged at 1.69%.
That means retailers should not assume:
- debit and credit cards always cost the same
- premium cards are always included at the base rate
- Apple Pay and Google Pay are treated differently from ordinary contactless cards
The best move is to check exactly which card types and wallet payments are covered by the headline fee.
Card Machine Fees for Small Retailers vs High-Volume Retailers
The best pricing model often depends on turnover.
Small retailers
Smaller shops usually care most about:
- low upfront cost
- simple pricing
- no long contract
- minimal setup hassle
For many of these businesses, flat-rate pricing works well because it is easy to understand and avoids fixed monthly commitments.
Growing retailers
Once a retailer’s card volume rises, the economics can change.
At that stage, they may care more about:
- lowering the effective transaction cost
- reducing friction at checkout
- integrating payments with POS or EPOS
- improving reporting and reconciliation
This is where a monthly plan or custom rate may start to make more sense.
High-volume retailers
Larger or busier retailers are often better served by:
- custom pricing
- negotiated merchant rates
- better reporting
- stronger terminal integration
- wider operational support
The important takeaway is that the “best” card machine fee is not universal. It depends on the structure of the business.
Hidden Card Machine Costs in the UK
This is where many retailers get caught out.
A payment provider may look affordable until the less obvious costs appear. Common hidden or overlooked costs include:
Terminal purchase price
The machine may be affordable, but it is still an upfront cost that needs to be factored in.
Monthly subscription charges
A lower fee plan may require a monthly payment.
Premium card pricing
Some providers charge more for premium or Amex cards. SumUp’s pricing page is a good reminder of this, as it lists a different rate for American Express and premium cards.
Accessories and consumables
Receipt rolls, charging accessories, stands, or other extras may not be included.
Connectivity costs
Some mobile payment devices rely on SIM or data options, which can affect ongoing cost depending on the setup.
Chargeback handling
Retailers should check whether disputed payments bring extra administration or fees.
Refund impact
A refund may still leave the original processing fee unrecovered.
POS integration costs
If the payment machine needs to be tied into a wider till or EPOS system, the true cost may include software and support beyond the payment provider itself.
Contract or exit issues
Not every provider uses long-term commitments, but retailers should always confirm the position in writing.
The broader point is simple: a cheap card reader is not automatically a cheap payment setup.
Are Cheap Card Machine Fees Actually Cheaper?
Sometimes they are. Sometimes they are not.
A low-cost payment option can be excellent for:
- pop-ups
- very small shops
- mobile sellers
- occasional traders
- new businesses testing demand
In those cases, flexibility and low commitment often matter more than squeezing out the last fraction of a percentage point.
But once card volume rises, a “cheap” setup may stop being the best-value one. If you are doing significant card turnover, using multiple terminals, or needing stronger reporting and POS integration, the lowest headline rate may not tell the full story.
This is exactly why providers offer different models. SumUp and Zettle both indicate that merchants processing around £10,000 or more a month may qualify for bespoke or custom pricing rather than the standard public rate.
That should tell retailers something important: pricing is not static. As your sales grow, your payment setup should be reviewed.
How Retailers Should Compare Card Machine Providers
When comparing providers, do not stop at the advertised percentage.
Ask these questions instead:
- What is the transaction fee?
- Is there a monthly fee?
- Do I buy the terminal or rent it?
- Are premium cards charged differently?
- How quickly do I receive payouts?
- Are there contracts or minimum terms?
- Is support included?
- Can the machine integrate with my POS or EPOS setup?
- What happens with refunds and chargebacks?
- Is bespoke pricing available once my turnover grows?
This kind of comparison is far more useful than just lining up two percentage figures and assuming the lower one wins.
Card Machine Fees and POS Costs: Why Retailers Should Compare Both Together
For many retailers, payments and POS are no longer separate decisions.
A card machine can be a standalone device, but in a busier shop it often makes more sense as part of a wider checkout and retail management setup. That is especially true where the retailer also wants:
- stock control
- cleaner reporting
- integrated reconciliation
- staff permissions
- faster checkout
- fewer manual errors
Shopify’s payment and POS model shows how these costs can sit inside a wider platform rather than acting as a separate payment-only expense. Its in-person fees vary by plan and form part of a larger commerce system.
For that reason, retailers should compare:
- card machine fees
- POS or EPOS software cost
- hardware
- support
- reporting tools
- operational efficiency
A slightly more expensive integrated setup can often be better value than a cheaper standalone card reader that creates extra work.
Sample Cost Scenarios for Different Retailers
Here is a practical way to think about payment cost by business type.
Small independent shop
This retailer may prioritise:
- low upfront spend
- simple card acceptance
- no monthly commitment
- easy setup
A flat-rate payment model may work well here because the volume is modest and simplicity matters.
Busy convenience store
This retailer may process a high number of lower-value transactions every day.
In that case, what matters is not just having a machine that works. It is having:
- smooth contactless flow
- fast payment approval
- reliable device performance
- sensible fee structure at volume
- strong connection to POS or EPOS
For this type of business, fee percentage and checkout efficiency both matter.
Growing retailer with multiple terminals
This retailer may need:
- more than one payment point
- multiple staff
- cleaner reporting
- more control across devices
Here, custom pricing or a wider POS-linked payment setup may offer better long-term value than an entry-level standalone card reader model.
How to Reduce Card Processing Costs Without Hurting the Customer Experience
Retailers do not need to chase the absolute lowest fee at any cost. They need to reduce waste without creating friction for staff or customers.
The best ways to do that are:
Compare total cost, not just transaction rate
Factor in hardware, monthly fees, and software.
Review your fee model as turnover grows
A pay-as-you-go plan may stop being the best fit once volume rises.
Check whether bespoke pricing is available
Both Zettle and SumUp highlight custom or tailored rates for higher-volume merchants.
Avoid duplicate tools
If your payment provider and POS software overlap awkwardly, you may end up paying twice for functionality.
Prioritise integration where it matters
If integrated payments reduce staff errors and reconciliation time, a slightly higher fee may still offer better business value.
Read the small print
Especially around refunds, premium cards, support, and contracts.
Final Thoughts
Card machine fees in the UK are not just about the machine itself.
For retailers, the true cost of taking card payments usually sits across transaction pricing, terminal cost, monthly fees, premium card handling, software, and how well the payment setup fits the wider checkout environment.
That is why the cheapest-looking card machine is not always the cheapest option in practice.
The best payment setup for a retailer is the one that matches transaction volume, keeps costs understandable, supports smooth customer service, and works properly with the way the shop trades every day.
If you are comparing payment options as part of a wider retail technology decision, it makes sense to assess card machine fees alongside your EPOS setup, not separately.
FAQs
How much are card machine fees in the UK?
It depends on the provider and the pricing model. Some UK providers charge a flat transaction fee, while others offer lower rates with a monthly subscription or bespoke pricing for higher-volume merchants.
Do card machines have monthly fees?
Some do and some do not. SumUp, for example, shows a pay-as-you-go option with no monthly cost, while its Payments Plus plan includes a monthly fee in exchange for a lower transaction rate.
What is the average card transaction fee for retailers?
There is no single market-wide average that fits every provider, but publicly listed UK payment models currently include examples such as Zettle’s 1.75% per transaction and SumUp’s 1.69% pay-as-you-go or 0.99% on certain plans.
Are card machine fees different for debit and credit cards?
Sometimes. Some providers keep pricing simple across card types, while others apply different rates for premium cards or American Express.
What is a merchant service charge?
It is a broader term covering the cost of processing card payments through a merchant account or payment provider. In practice, many retailers use it to mean the wider set of payment acceptance charges.
Can retailers negotiate lower card processing fees?
Yes, sometimes. Providers such as Zettle and SumUp indicate that merchants with around £10,000 or more in monthly card payments may qualify for bespoke or custom pricing.
Are contactless payments charged differently?
Not always. It depends on the provider’s pricing model. Some providers include contactless and mobile wallet payments within the same fee structure.
Should I compare card machine fees with EPOS costs too?
Yes. For many retailers, the payment setup works best when it is assessed alongside POS or EPOS software, reporting, support, and checkout efficiency rather than as a standalone cost.
