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10 best small business payment processing systems in the UK

Last update: June 27, 2026

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Small business payment processing helps UK businesses take payments, track sales and keep cash moving across card readers, online checkout, invoices, subscriptions and marketplace payouts.

For many SMEs, payment processing affects far more than checkout. Businesses need fast payouts, clear fees, simple reconciliation, smooth refunds and enough cash available for stock, wages, tax and supplier bills.

That matters in a market built on small businesses. At the start of 2025, the UK had 5.64 million small businesses, equal to 99.18% of the total business population, according to GOV.UK.

In this guide, we compare 10 of the best small business payment processing systems in the UK, from card readers and payment gateways to tools that support online sales, subscriptions and international payments.

We’ll also explain where WorldFirst and its World Account fit as a multi-currency account for businesses that need to manage international revenue, marketplace payouts, supplier payments and currency conversion after the sale.

What is payment processing and how does it work for small businesses?

Payment processing is how a small business collects money from customers and moves it into the business account. It covers card payments, online checkout, invoices, payment links, subscriptions, digital wallets, bank payments and marketplace sales.

Cards remain central in the UK. UK Finance reported that card payments accounted for 64% of all UK payments in 2024, so most businesses need a reliable way to accept debit cards, credit cards, contactless payments and mobile wallets.

A customer pays in-store, online, through an invoice or via a marketplace. The payment provider checks the transaction, collects the funds, deducts any processing fees and pays the rest into your business account.

Payout timing varies by provider, payment method, risk checks and account setup. Some payouts arrive the same day or next working day, while others take longer.

Online checkout also matters. ONS data shows that online sales accounted for 28.7% of total retail sales in Great Britain in March 2026, so many small businesses need payment tools that work across both physical and digital sales.

A payment processing setup usually includes:

A way to take payments: Card reader, POS system, online checkout, payment link, invoice or recurring billing tool
A provider that checks transactions: Payment details go to the customer’s bank or card issuer for approval
A payout process: Approved funds move into your business account after fees
Reporting tools: Sales, fees, refunds and payouts appear in one place for easier reconciliation
Refund and dispute support: Tools help manage returns, chargebacks and failed payments

How we chose the best small business payment processing systems

We looked at each provider through the lens of a UK small business: how easy it is to start taking payments, how quickly money arrives, what fees apply and how well the system fits different ways of selling.

That means we considered more than card acceptance. We reviewed each provider for:

UK availability: Access for UK businesses, local pricing and UK support
Payment channels: In-store payments, online checkout, payment links, invoices and recurring billing
Business fit: Retail, e-commerce, services, subscriptions, marketplaces or international trade
Payout speed: How quickly approved funds reach your account
Costs: Transaction fees, monthly fees, card reader costs, chargeback fees and FX charges
International use: Multi-currency support, overseas card payments, FX costs and cross-border payouts
Marketplace support: Useful features for businesses selling through platforms such as Amazon, Shopify, eBay and other channels
Integrations: Accounting, e-commerce, POS and reporting tools
Risk controls: Fraud checks, refunds, chargebacks and account security
Ease of use: Setup, dashboard quality, customer support and daily management

Best small business payment processing systems in the UK

Here’s a quick look at what each provider supports and where it stands out:

Payment system	Best for	Works well for	Main payment methods
Stripe	Flexible online checkout	E-commerce, SaaS, subscriptions, platforms	Cards, wallets, payment links, subscriptions, online checkout
Square	Simple POS and mixed selling	Cafés, salons, pop-ups, small retailers, local services	Card readers, POS, invoices, online checkout, payment links
SumUp	Low-friction card reader setup	Tradespeople, market sellers, mobile businesses, seasonal traders	Card readers, Tap to Pay, payment links, online payments
Shopify Payments	Shopify checkout	Shopify stores, DTC brands, product-led e-commerce	Cards, wallets, Shopify checkout, store payouts
PayPal	Familiar wallet checkout	Freelancers, creators, charities, small online stores	PayPal Checkout, cards, wallets, invoices, payment links
Worldpay	Established merchant services	Retailers, hospitality businesses, higher-volume SMEs	Card machines, online payments, virtual terminal, payment links
takepayments	Guided card payment setup	Independent shops, cafés, restaurants, local services	Card machines, POS, online payments, phone payments
GoCardless	Direct Debit and recurring bank payments	Memberships, agencies, accountants, charities, B2B services	Direct Debit, recurring payments, Instant Bank Pay
Mollie	Broad online payment choice	E-commerce stores, European-facing sellers, subscription businesses	Cards, wallets, local payment methods, recurring billing, payment links
Tyl by NatWest	UK card machines and payment tools	Small businesses that want card, online and phone payments from a familiar UK name	Card machines, Tap to Pay, online payments, payment links, virtual terminal

1. Stripe

Stripe gives businesses a flexible payment stack rather than a single checkout tool. You can use its hosted checkout, send payment links, manage recurring billing or build custom payment flows through APIs.

For UK merchants, Stripe charges 1.5% + 20p for standard UK cards and 1.9% + 20p for premium UK cards. International cards, currency conversion and extra products can raise the final cost, so the full fee stack matters if you sell across borders.

Key features:

Hosted checkout: Ready-made checkout pages for online payments
Payment links: No-code links for invoices, campaigns or simple sales
Subscription billing: Recurring payment tools for memberships and SaaS pricing
Developer APIs: Flexible payment flows for custom sites, apps and platforms
Fraud tools: Risk controls for online card payments

Best for: E-commerce brands, SaaS companies, platforms and online businesses that want flexible checkout rather than a basic payment button.

2. Square

Square brings payment acceptance and day-to-day selling tools into one system. Businesses can take card payments, track sales, manage items, send invoices and review payouts from the same dashboard.

Square charges 1.75% for in-person card payments in the UK. It also applies an additional fee for cards issued outside the UK, which is worth checking if your business serves tourists or international customers.

Key features:

Card readers: Contactless, chip and PIN and mobile wallet payments
POS tools: Sales, items, staff and inventory features
Online selling: Square Online and checkout tools
Invoices: Payment requests for services and remote orders
Reporting: Sales, refunds and payouts in one dashboard

Best for: Cafés, salons, pop-ups, small retailers and local service businesses that want card payments and simple POS tools together.

3. SumUp

SumUp keeps card acceptance simple. Its setup focuses on portable card readers, Tap to Pay and pay-as-you-go pricing, so businesses can start taking payments without a long merchant services process or a heavy monthly commitment.

SumUp charges 1.69% for in-person payments on its standard pay-as-you-go plan and 2.50% for online payments. Its Payments Plus plan costs £19 per month and lowers the in-person transaction fee, which may help businesses with steadier card volume.

Key features:

Portable card readers: Useful for counters, stalls and mobile work
Tap to Pay: Take contactless payments from a compatible phone
Payment links: Send remote payment requests without a website
Pay-as-you-go pricing: No monthly fee on the standard plan
Payments Plus: Lower in-person rates for a monthly fee

Best for: Tradespeople, market sellers, mobile businesses, seasonal traders and small shops that want a simple route into card payments.

4. Shopify Payments

Shopify Payments keeps the checkout inside the same place where merchants manage products, orders and store reporting.

That reduces the need to connect a separate gateway from day one and gives store owners a cleaner view of payments, payouts and fraud checks.

Shopify’s UK help centre also covers local bank account requirements, payout details and verification requirements for UK businesses.

Key features:

Built-in Shopify checkout: Payments handled inside the Shopify store admin
Order-linked reporting: Payments, orders and payouts connected in one place
Fraud analysis: Risk signals tied to Shopify orders
Multiple payment methods: Card and wallet options at checkout
Payout visibility: Payment tracking inside Shopify

Best for: Shopify stores, DTC brands and small e-commerce teams that want checkout and payment reporting inside the platform they already use.

5. PayPal

PayPal gives customers a checkout option they already know. Many shoppers already have a PayPal account, so they can pay without typing their card details into another website.

It can also help if you sell outside the UK. PayPal supports 200+ markets and 130 currencies, so you can use it alongside card checkout for customers who prefer a familiar wallet option.

Key features:

PayPal Checkout: Familiar wallet checkout for online customers
Card and wallet payments: More choice at checkout
Payment links and buttons: Simple tools for selling without a full store
Invoicing: Useful for freelancers and service businesses
Cross-border checkout: Support for many international markets and currencies

Best for: Freelancers, creators, charities, small online stores and businesses that want to add a recognised wallet option to checkout.

6. Worldpay

Worldpay offers a more traditional merchant services setup, with card machines, e-commerce payments, POS, payment links, virtual terminal tools and settlement support.

It gives businesses several ways to accept payments through a single provider, but pricing often requires a quote rather than a quick flat-rate comparison.

Key features:

Card machines: Countertop, portable and mobile options
Online payments: E-commerce checkout and gateway tools
Virtual terminal: Take payments over the phone
Payment links: Remote payment collection
Tailored pricing: Quote-based plans for different payment volumes

Best for: Established SMEs, retailers, hospitality businesses and companies with higher card volumes that want online and in-person payments from a large provider.

7. takepayments

takepayments feels more hands-on than many self-serve payment platforms. Instead of picking a plan from a public rate card, you can speak to a team about card machines, online payments, POS systems and pricing.

Its setup includes tailored transaction rates, next-working-day settlement, a dedicated joining team, seven-day-a-week support and 12-month contracts. That can work well for businesses that want guidance, but it also makes the quote worth checking closely before you sign.

Key features:

Card machines: Options for in-store, mobile and on-the-go payments
Online payments: Tools for taking payments remotely
POS systems: Useful for shops, cafés and hospitality businesses
Next working day settlement: Helps with daily cash flow
Guided onboarding: Support during setup and switching

Best for: Independent shops, restaurants, cafés and local businesses that want help choosing and setting up a card payment system.

8. GoCardless

GoCardless focuses on bank payments rather than card checkout. Its strength is collecting money directly from customer bank accounts through Direct Debit and other bank payment options, which can work well for regular invoices, memberships and subscriptions.

GoCardless charges 1% + 20p per UK Direct Debit transaction on its Standard plan, capped at £4. That cap can make a difference for larger recurring payments, where uncapped percentage fees can become expensive.

Key features:

Direct Debit: Collect regular payments from customer bank accounts
Recurring payments: Useful for subscriptions, memberships and retainers
Instant Bank Pay: One-off bank payments
Failed payment handling: Tools for retries and payment recovery
Integrations: Connections with accounting and business software

Best for: Membership businesses, agencies, accountants, charities, B2B service providers and subscription businesses that collect predictable payments from customer bank accounts.

9. Mollie

Mollie makes payment setup simple while giving customers plenty of payment options. You can use it for online payments, in-person payments, recurring billing, payment links and invoicing, with support for cards, wallets and local European payment methods.

Its pricing model is flexible, with no minimum costs, no lock-in contracts and no hidden fees. You pay when a transaction goes through.

Key features:

Broad payment choice: Cards, wallets and local payment methods
Hosted checkout: Quick setup for online stores
Recurring billing: Support for subscription payments
Payment links: Remote selling through email, chat or invoices
No lock-in contract: Flexible setup for growing businesses

Best for: E-commerce stores, European-facing sellers, subscription businesses and smaller online teams that want broad payment choice without a long contract.

10. Tyl by NatWest

Tyl by NatWest gives UK businesses a familiar name behind their payment setup, with tools for card machines, online payments, payment links, phone payments and Tap to Pay.

Tyl includes next-business-day settlement as standard across its payment options. Card terminal hire starts from £13.99 per month + VAT, with a 12-month contract, while Tap to Pay lets businesses accept contactless payments from a compatible smartphone.

Key features:

Card machines: Take payments in-store or on the move
Tap to Pay: Accept contactless payments from a compatible smartphone
Online payments: Hosted checkout and website payment tools
Payment links: Remote payment collection
Virtual terminal: Take payments over the phone
Next business day settlement: Standard across Tyl payment options

Best for: UK small businesses that want card machines, online payments and phone payments from a provider connected to a familiar banking brand.

Where WorldFirst fits into small business payment processing

For UK businesses that sell in one market, payment processing may feel complete once customer payments land in the business account. Cross-border businesses usually have a few more moving parts.

Sales can come in through marketplaces, overseas customers or payment platforms in different currencies. After that, you still need to hold funds, convert money, pay suppliers, manage ad spend and keep international costs under control.

That’s where WorldFirst fits into the wider payment setup. You can use tools like Stripe, Shopify Payments, PayPal or a card machine to take customer payments, then use World Account to manage what happens after the sale.

WorldFirst isn’t a checkout payment processor or card acquirer. It’s a regulated financial platform built for businesses that trade across borders, with the World Account designed to help companies receive, hold, convert and send money in multiple currencies.

Key features:

Multi-currency collections: Receive and hold money in 20+ currencies from one account
Marketplace payouts: Collect earnings from 130+ marketplaces, including Amazon, Etsy, TikTok Shop and AliExpress
Supplier payments: Send money in 100+ currencies to pay overseas suppliers, contractors and business partners
FX control: Hold funds and convert currencies when the timing works for your business
World Card: Pay in 150+ currencies across 210+ countries and territories
Lower card FX costs: Pay with zero FX fees in 15 major currencies when spending from your WorldFirst balance
Business spend rewards: Earn up to 1.2% cashback on eligible World Card purchases

For small businesses selling across borders, WorldFirst can help manage the part after checkout: collecting international revenue, holding currencies, converting funds and paying suppliers when the timing works for your business.

Open a World Account to receive, hold, convert and send money across currencies, so you can keep more control over currency and payment timing.

FAQ

1. What is the cheapest payment processor for small businesses in the UK?

The cheapest option depends on how you accept payments, your monthly sales volume, the card types you accept and any FX costs. Compare the full monthly cost, not just the headline transaction rate.

2. Can I take card payments without a card machine?

Yes. You can take card payments through online checkout, payment links, invoices, QR codes or a virtual terminal. You only need a card machine for face-to-face payments.

3. Do small businesses need a payment gateway?

You need a payment gateway if you accept card payments online. For in-person sales only, a card reader or POS system may be enough.

4. How can small businesses accept international payments?

Small businesses can accept international payments through payment gateways, marketplaces, PayPal, card processors and multi-currency accounts. A multi-currency account can help you receive, hold and convert funds after the sale.

Sources:

https://www.gov.uk/government/statistics/business-population-estimates-2025/business-population-estimates-for-the-uk-and-regions-2025-statistical-release
https://www.ukfinance.org.uk/system/files/2025-10/Payment%20Markets%20Report%20Summary.pdf
https://www.ons.gov.uk/businessindustryandtrade/retailindustry/timeseries/j4mc/drsi
https://stripe.com/gb
https://squareup.com/gb/en
https://www.sumup.com/en-gb/
https://www.shopify.com/
https://www.paypal.com/uk/home
https://www.worldpay.com/en-GB
https://www.weareplanet.com/
https://www.mollie.com/
https://www.tylbynatwest.com/
http://www.takepayments.com/
https://www.worldfirst.com/uk/

Abdul Muhit has 17 years' experience in banking and payments, spanning across regulation, payment networks, acquiring, issuing and treasury.

Abdul Muhit

Author

Commercial Growth Manager, WorldFirst UK

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10 best small business payment processing systems in the UK

What is payment processing and how does it work for small businesses?

How we chose the best small business payment processing systems