Best Card Machine for Small Businesses in the UK (2026)
If you run a small business in the UK and you are reviewing your card machine setup, this guide covers everything you need to make a confident decision. We will look at which type of terminal suits different business environments, what the major providers are actually charging in 2026, and where the real savings are for businesses processing more than a few thousand pounds per month.
Most small business owners choose a card machine provider early on and stick with it. The problem is the market has shifted significantly over the last three years, and what made sense when you started out may be costing you considerably more than it should now.
Quick Provider Comparison: Card Machines for Small Businesses UK 2026
Here is a straightforward comparison of the main providers available to UK small businesses in 2026. We have focused on the numbers that actually matter for day-to-day trading.
| Provider | Transaction Rate | Monthly Fee | Settlement | Contract |
|---|---|---|---|---|
| SumUp | 1.69% flat | None | 1–3 days | None |
| Square | 1.75% flat | None | 1–2 days | None |
| Zettle | 1.75% flat | None | 1–2 days | None |
| Dojo | From 1.4% | £15–£25 | Next day | 18 months |
| BoonPayBest Value | From 0.35% debit | From £15 rental | Next day gross | 18 months |
BoonPay tiered rates are based on monthly volume. Rates quoted for debit card transactions, which make up the majority of UK consumer payments.
Types of Card Machine for Small Businesses
There are three main types of card machine and the right choice depends entirely on how your business operates.
Countertop Terminal
A fixed device that connects via cable or broadband. Best for businesses where customers always come to a single payment point: retail shops, reception desks, pharmacies, and dental practices. Fast, reliable, and no battery management required. The PAX A35 is the countertop option in the BoonPay range.
Portable Terminal
A wireless device that works over Wi-Fi and 4G across your premises. The most popular choice for restaurants, pubs, cafes, salons, and barbershops where staff take payments away from a fixed till. Battery life is the critical factor for high-volume venues. The PAX A50 handles a full trading day comfortably at 161g. The PAX A920 Pro includes a built-in receipt printer and a 5,250mAh battery, making it the stronger option for busy hospitality venues.
Mobile Terminal
Designed for businesses that operate away from a fixed location entirely. Market traders, mobile hairdressers, delivery drivers, plumbers, and other tradespeople all benefit from a terminal that runs purely on 4G with no Wi-Fi dependency. The Castle S1 Mini 2 is the most compact device in the BoonPay range at 160g.
What to Look for When Choosing a Card Machine Provider
The hardware is only part of the decision. Here is what separates a good provider from an expensive one.
Transaction Fees and Pricing Structure
This is where the biggest cost difference lies. Flat-rate providers like SumUp and Square charge the same percentage on every transaction regardless of card type. Tiered pricing separates debit from credit transactions and charges less on debit, which makes up around 70 to 80% of UK consumer card payments.
For a business processing £5,000 per month or more, tiered pricing almost always works out cheaper. The saving grows significantly as your volume increases. See the cost comparison table below.
Settlement Speed
How quickly your takings land in your bank account has a direct effect on cash flow. Some providers take two to three business days. BoonPay offers next-day gross settlement as standard, meaning the full amount you take arrives in your account the following business day with no fees deducted before transfer. Fees are collected separately at the end of the month as a single itemised bill.
Contract Terms
Pay-as-you-go providers have no contracts, which suits very new or very low-volume businesses. Traditional merchant services providers typically use 18-month terms. Always check for auto-renewal clauses and early exit fees before signing. Some providers still use three to five-year contracts with significant exit penalties. BoonPay operates on an 18-month term with clear conditions explained upfront.
Hidden Charges to Watch For
Beyond the headline transaction rate, watch for these charges that regularly appear on merchant statements without being clearly explained upfront:
PCI compliance fee: typically £5 to £15 per month per terminal
Minimum monthly service charge: a floor charge if your transaction fees fall below a set amount
Statement fees: a charge simply for receiving a monthly statement
Chargeback administration fees: charged each time a customer disputes a transaction
Early termination fees: can run into hundreds of pounds on some contracts
BoonPay charges £6 per month per terminal for PCI compliance, clearly itemised. There are no minimum monthly service charges or statement fees.
Customer Support
A card machine going down on a Friday evening or a busy Saturday is not something you can wait until Monday to resolve. Check whether your provider offers phone support during evening and weekend trading hours and whether you can speak to a real person. BoonPay offers 7-day UK-based support.
What Should a Small Business Actually Pay in 2026?
To put real numbers around this, here is how the costs compare at different monthly volumes, assuming an 80% debit and 20% credit card split.
| Monthly Volume | SumUp (1.69%) | Square (1.75%) | BoonPay (tiered est.) | Est. Monthly Saving |
|---|---|---|---|---|
| £5,000 | £84.50 | £87.50 | £35–£45 | ~£45 |
| £10,000 | £169 | £175 | £65–£85 | ~£90 |
| £20,000 | £338 | £350 | £120–£150 | ~£190 |
| £30,000 | £507 | £525 | £175–£215 | ~£300 |
BoonPay estimates based on tiered pricing at standard rates. Actual rates depend on business type and monthly volume. Terminal rental not included in the above figures.
As a benchmark for what reasonable rates look like for a UK small business in 2026:
Debit card transactions: 0.35% to 0.6%
Consumer credit card transactions: 0.65% to 1.0%
Terminal rental: from £15 per month depending on device
PCI compliance: £6 per month per terminal, clearly itemised
Next-day gross settlement included as standard
No minimum monthly service charges
Which Card Machine Is Right for Your Business Type?
Retail Shops
A countertop terminal at the till point is the most common setup. For shops with a separate stock room or where staff assist customers around the floor, a portable terminal gives more flexibility. The PAX A35 or PAX A50 covers most retail environments.
Restaurants and Pubs
Table service requires portable terminals, ideally with a built-in receipt printer for itemised bills. Battery life matters significantly in high-volume evening venues. The PAX A920 Pro is the strongest option for busy hospitality businesses. For smaller venues with lighter traffic, the PAX A50 handles most situations comfortably.
Coffee Shops and Cafes
Counter service cafes typically work well with a countertop or portable terminal at the till. Larger cafes with table service benefit from the PAX A920 Pro. The speed of the terminal matters more in a busy coffee environment than in most other business types.
Salons and Barbershops
Portable terminals with tip functionality are the standard for salons and barbers. The PAX A50 handles this well and its light weight makes it practical for staff to carry throughout the day. Settlement speed matters for businesses with daily cash flow requirements.
Dental Practices and Healthcare
Fixed or portable depending on whether payments are taken at a reception desk or in a treatment room. The key consideration for healthcare is reliable uptime and clear itemised statements for accounting purposes.
Market Stalls, Mobile Traders, and Tradespeople
A 4G-only mobile terminal is the only practical option for businesses without a fixed Wi-Fi connection. The Castle S1 Mini 2 is built for this use case, with full 4G connectivity and compact dimensions that fit in a work bag.
Vape Shops
Standard card machine setup applies. The key consideration for vape retailers is ensuring your provider is comfortable with the product category, as some acquirers apply different risk classifications. BoonPay handles vape retail as standard.
Takeaways and Fast Food
High transaction volumes and the speed of service mean terminal reliability and settlement speed are the priority. For takeaways using third-party delivery platforms, it is also worth reviewing whether your provider's rates are competitive against what aggregators charge per order.
Chip and PIN vs Contactless vs Mobile Payments: What Does Your Business Need?
All BoonPay terminals accept every payment method your customers will want to use in 2026:
Chip and PIN: still the most secure option for higher-value transactions and the default fallback for all card types
Contactless: the dominant payment method for transactions under £100, covering both physical cards and mobile wallets
Apple Pay and Google Pay: increasingly the default for customers paying by phone, particularly in urban areas
Amex: available on request, rates differ from standard Visa and Mastercard transactions
If you regularly take card-not-present payments by phone, that falls under MOTO (Mail Order / Telephone Order) processing, which requires a virtual terminal setup. Speak to the team if this applies to your business.
How to Switch Card Machine Provider Without Disruption
Switching is simpler than most business owners expect. The process typically takes 7 to 14 working days end to end. Here is what it involves:
Check your current contract for any notice period or early exit fee
Get a comparison quote and confirm the rates in writing before committing
Complete the application, which BoonPay handles with you directly
Run both terminals briefly in parallel during the transition to avoid any gap in payment processing
Cancel your previous provider once the new setup is confirmed and trading
The most common reason businesses delay switching is the assumption that it is more complicated than it is. In most cases the saving in the first month alone covers any administrative effort involved.
Why Small Businesses Choose BoonPay
BoonPay is a UK-based card payment provider supplying businesses across the UK through our partnership with NPI, one of the UK's leading payment processors. Here is what makes the difference specifically for small businesses.
Tiered pricing based on your revenue, not a flat rate that becomes expensive as you grow
Next-day gross settlement as standard: your full takings land the following business day
Transparent pricing with every charge clearly itemised on your monthly statement
7-day UK-based support so you can reach a real person during evening and weekend hours
18-month contracts with no hidden exit fees and no auto-renewal surprises
Built-in digital loyalty programme through NPI Payment Loyalty for businesses that want to reward repeat customers
Free merchant website template included for new customers
Frequently Asked Questions
What is the best card machine for a small business in the UK?
It depends on how your business operates. For a fixed counter, the PAX A35 or A50 works well. For businesses that move around the premises, the PAX A50 is the most popular choice. For high-volume venues needing a receipt printer, the PAX A920 Pro is the strongest option. For mobile businesses and market traders, the Castle S1 Mini 2 is the most practical device.
How much should a card machine cost for a small business?
The main costs are terminal rental, transaction fees, and PCI compliance. With BoonPay, terminal rental starts from £15 per month depending on device, transaction fees start from 0.35% on debit and 0.65% on credit depending on your monthly volume, and PCI compliance is £6 per month per terminal, clearly itemised. There are no minimum monthly service charges or statement fees.
Is SumUp or Square better for a small business?
Both work well for very new or very low-volume businesses where simplicity and no monthly commitment are the priority. Once your card volume grows above around £5,000 per month, tiered pricing consistently works out cheaper. The flat rate that makes sense at £2,000 per month becomes a significant overpayment at £15,000 per month.
What is the cheapest card machine for a small business?
The cheapest upfront option is a pay-as-you-go provider with no monthly fees. The cheapest long-term option for any business with consistent volume is a tiered pricing structure. The right answer depends on your monthly transaction value and how long you have been trading.
How quickly do card payments settle for small businesses?
BoonPay offers next-day gross settlement as standard. Payments taken today land in your account the following business day in full, with no fees deducted before transfer. Fees are billed separately at the end of the month as a single itemised charge.
Do I need a contract to get a card machine?
Pay-as-you-go providers like SumUp and Square have no contracts. BoonPay offers 18-month terms, which is more flexible than the three to five-year agreements some traditional providers still use. All terms are explained clearly before you sign.
What is a chip and pin machine for a small business?
A chip and PIN machine, also called a card terminal or PDQ machine, is the device that processes card payments from your customers. All BoonPay terminals accept chip and PIN, contactless, Apple Pay, and Google Pay as standard.
Can I get a card machine with no long-term contract?
Yes. Pay-as-you-go providers offer card machines with no contract commitment. BoonPay's minimum term is 18 months, which most small businesses find a reasonable commitment in exchange for significantly lower transaction rates compared to flat-rate pay-as-you-go providers.
What card machine charges should I expect?
Typical charges include transaction fees, PCI compliance, and terminal rental. With BoonPay these are clearly itemised on every statement. Watch for providers that bundle compliance and support costs invisibly into their percentage rate, which makes it difficult to understand exactly what you are paying.
Find Out What You Are Actually Paying
Upload your current merchant statement and we will run a free, no-obligation comparison showing exactly what you would pay with BoonPay versus what you are paying now. No sales pressure, just honest numbers.
Visit boonpay.uk/review to get your free statement review.