Square vs Merchant Accounts 2026 UK | Fees, Costs & Which Is Best? Quick answer
Square is best for small businesses and startups, offering simple flat-rate pricing, no contracts, and quick setup.
Merchant accounts are better for growing and high-volume businesses, offering lower transaction fees and custom pricing.
👉 Square = best for simplicity
👉 Merchant account = best for saving money at scale
If you would like to learn more about merchant service providers, you can do so here .
Contents
Square vs Merchant Account: Fees Comparison
Square vs Merchant Account: Features Comparison
Pricing Model Explained
Pros & Cons
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: April 2026
For a comprehensive comparison, use our comparison tool here today.
Key Takeaways
Square uses flat-rate pricing (1.75%)
Merchant accounts use Interchange++ (often cheaper)
Square has no contracts and is easy to set up
Merchant accounts offer lower fees for higher volumes
Many businesses switch once they process £3k–£5k+ per month
Merchant accounts can reduce fees by 10–40%
Square vs Merchant Account: Fees Comparison
Feature Square Merchant Account
In-person payments
1.75%
~0.3%-1.5%
Online payments
1.4% + 25p
Custom
Monthly fees
£0
£10–£30
Setup fee
£0
£0
Contracts
No
Usually
👉 Our winner: using a merchant account is going to be cheaper for most growing businesses
Square vs Merchant Account: Features Comparison (UK 2026)
Feature Square Merchant Account
POS system
Advanced
Varies
Pricing simplicity
Very simple
Complex
Reporting
Strong
Good
Integrations
Extensive
Varies
Support
Standard
Dedicated (often)
Scalability
Medium
High
👉 Our winner: Depends on needs (Square = ease, Merchant account = scale)
What Is Square? Square is a pay-as-you-go payment platform that:
Charges a flat 1.75% per transaction
Requires no contract
Offers POS software and hardware
👉 So they are great for small businesses and new ventures
What Is a Merchant Account? A merchant account is a dedicated business payment account that:
Uses Interchange++ pricing
Offers lower fees for debit cards
Provides custom pricing based on volume
👉 Designed for established or scaling businesses
Pricing Model Explained Square (Flat Rate)
Fixed 1.75%
Simple and predictable
No negotiation
Merchant Account (Interchange++)
Lower fees (especially debit cards)
Negotiable pricing
More complex billing
👉 our rule of thumb:
Low volume → Square
High volume → Merchant account
When Should You Switch from Square? You should consider switching if you:
Process £3,000-£5,000+ per month
Want lower transaction fees
Need better support
Are scaling your business
👉 Many businesses outgrow Square as they grow.
How Much Can You Save? Switching to a merchant account can reduce:
10-40% on transaction fees £500-£5,000+ annually depending on volume
👉 The higher your turnover, the more you save.
Best Merchant Account Providers (UK)
Best Choice by Business Type
Business Type Best Option
Startup
Square
Sole trader
Square
Small business
Square
Retail / hospitality
Merchant account
High turnover
Merchant account
Multi-location
Merchant account
👉 Most businesses start with Square, then upgrade
Pros & Cons Square Pros
No monthly fees
Easy setup
Simple pricing
Strong POS system
Square Cons
Expensive at scale
No negotiation
Limited cost control
Merchant Account Pros
Lower fees
Custom pricing
Scalable
Better for high-volume businesses
Merchant Account Cons
Contracts required
Monthly fees
More complex pricing
Our Verdict Square is the best option for getting started, offering simplicity and flexibility, but merchant accounts are the better long-term solution, offering lower fees and scalability.
👉 Square = best for small businesses
👉 Merchant account = best for growth and savings
FAQs Is a merchant account cheaper than Square?
Yes, for higher-volume businesses, merchant accounts are usually significantly cheaper.
When should I switch from Square?
When you process around £3k–£5k+ per month.
Is Square a merchant account?
No, Square is a payment facilitator, not a traditional merchant account.
Do merchant accounts require contracts?
Usually yes, although terms vary.
Which is better for small businesses?
Square is typically better due to simplicity.
Can I switch easily?
Yes! many businesses switch providers as they grow.
What’s the biggest difference?
Square = simple flat-rate
Merchant account = cheaper, custom pricing
👉 Compare merchant account providers and save up to 40% today
Related Merchant Account Guides If you’re researching merchant accounts and card payment processing, the guides below explore specific providers, use cases, costs and common questions in more detail.
Merchant Account Basics & FAQs
Understand how merchant accounts work and what to expect before signing up:
Major UK Merchant Account Providers
Detailed reviews of leading UK merchant account providers and acquirers:
Payment Providers & Alternatives
Explore pay-as-you-go and hybrid payment providers often compared with merchant accounts:
Card Payments, EPOS & POS Context
Learn how merchant accounts fit into wider payment and EPOS setups:
Next Step: Compare Merchant Accounts
If you want tailored pricing based on your turnover, industry and risk profile, use our comparison tool to review UK merchant account providers side by side.
👉 Compare merchant accounts →
Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
