Best Payment Processing Companies in the UK for 2026

Choosing the right payment processor can save your business thousands per year. We've independently reviewed and compared the leading UK payment processing companies to help you find the best fit based on your turnover, sales channels, and business type.

Our Top Picks at a Glance

1. Stripe — Best for Online Businesses

Stripe dominates the e-commerce space with its developer-friendly API, extensive integrations, and transparent flat-rate pricing. There are no monthly fees, no setup costs, and no minimum contract. At 1.5% + 20p for UK cards, it's competitive for online businesses — though brick-and-mortar sellers may find better rates elsewhere.

• Supports 135+ currencies with automatic conversion
• Advanced fraud protection with Stripe Radar (machine learning-based)
• Built-in recurring billing, invoicing, and subscription management
• Custom checkout, payment links, and no-code options available

2. Global Payments — Best for Negotiated Rates

Global Payments is one of the world's largest acquirers, processing billions of transactions annually. They offer interchange++ pricing for businesses processing over £10,000/month, which delivers some of the lowest effective rates in the UK market. Their omnichannel solutions cover in-store, online, and mobile.

• IC++ pricing delivers true cost transparency
• Dedicated account management for qualifying businesses
• Next-day settlement available
• Wide range of POS hardware and gateway options

3. Worldpay — Best for Omnichannel

Worldpay (now part of FIS) processes around 40% of all UK card transactions. They offer a comprehensive suite of payment solutions — from countertop terminals to full e-commerce gateways. Pricing is competitive for larger businesses but contracts can be lengthy.

4. Square — Best for Simplicity

Square's flat 1.75% rate for in-person payments (no monthly fee) makes it ideal for small businesses, market traders, and pop-up shops. The free POS software includes inventory management, staff tools, and basic analytics. However, the flat rate becomes expensive at higher volumes.

5. SumUp — Best Budget Option

SumUp offers the lowest flat rate for in-person payments at 1.69% with no monthly fees. Their card readers start from £29 with no ongoing costs. It's the simplest entry point for micro-businesses, though it lacks the advanced features of competitors.

6. Barclaycard Payments — Best for Bank Integration

Barclaycard leverages the Barclays banking relationship to offer competitive rates, especially for existing Barclays business customers. They offer next-day settlement to Barclays accounts and a range of terminal and gateway options.

How to Choose the Right Processor

• Monthly turnover under £5,000: Flat-rate providers (Square, SumUp, Stripe) keep things simple with no monthly fees.
• £5,000–£25,000/month: Start comparing IC++ options from acquirers like Global Payments or Worldpay for potential savings.
• Over £25,000/month: Always negotiate IC++ pricing. Even a 0.1% reduction at this volume saves hundreds per year.
• Online-only: Stripe or a gateway-focused provider will give you the best developer experience and conversion rates.
• Retail/hospitality: Consider the POS ecosystem — Clover (Fiserv), Square, or Worldpay offer integrated hardware and software.

Need help deciding? Get a free, no-obligation comparison tailored to your business.