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Compare payment processors

Smarter payments. Keep more of every sale.

We compare card rates, international and currency conversion fees, recurring billing and payout costs, so SaaS and online businesses can see what they really pay.

Recurring billing for SaaSMulti-currency checkoutInterchange-plus pricingBank debits
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All payment processors

5 processors in United Kingdom

Stripe

4.3 / 5 Treasi rating

Payment processor · Online

The default for online and SaaS businesses

No monthly fee and 1.5% + 20p on standard UK cards, with higher rates for EEA and international cards and 2% for currency conversion.

UK cards

1.5% + 20p

Standard cards

International cards

3.25% + 20p

Outside the EEA

Currency conversion

+2%

When conversion is needed

Stripe
View details →
3.1 / 5 Treasi rating

Commerce platform · Ecommerce

Payments built into your Shopify store

Card processing built into Shopify, with a 1–1.5% currency conversion fee when customers pay in a different currency from your payout currency.

Currency conversion

1–1.5%

By plan (Basic 1.5%)

Card rates

By plan

Lower on higher plans

Payouts

Multi-currency

Fees on non-local currencies

Shopify Payments
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Paddle

3.5 / 5 Treasi rating

Merchant of record · SaaS

Sell software worldwide without the tax burden

Paddle acts as the merchant of record for SaaS and software, handling payments, subscriptions and global sales tax and VAT for you.

Pricing

~5% + 50¢

Per transaction

Sales tax

Handled

As merchant of record

Billing

Subscriptions

Built in

Paddle
View details →

GoCardless

4 / 5 Treasi rating

Bank debits · Recurring

Lower-cost recurring payments from bank accounts

Collect subscription and invoice payments directly from customers’ bank accounts, usually for less than card fees.

Pricing

Bank debit pricing

Per payment

Method

Bank debit

No cards needed

Best for

Recurring

Subscriptions and invoices

GoCardless
View details →

SumUp

3.7 / 5 Treasi rating

Payment processor · Card readers

Low flat rates with no contract

One flat 1.69% rate for in-person cards, including American Express and international cards, with no monthly fee, or 0.99% on eligible UK cards with Payments Plus for £19 a month.

In person

1.69%

All cards, pay as you go

Payments Plus

0.99%

£19 a month, eligible UK cards

Online

2.5%

Links, invoices, store

SumUp
View details →

Our top picks

Flat rate, interchange-plus or merchant of record?

How a provider charges you matters as much as the headline rate, especially as your volume grows.

Flat rate

One simple percentage plus a fixed fee per payment. Easy to predict, but you pay the same even on cheap cards.

Interchange-plus

The card networks’ real cost plus a fixed margin. Usually cheaper once you process meaningful volume.

Merchant of record

The provider sells on your behalf and handles sales tax and VAT worldwide, for a higher fee per payment.

How we rate payment processors

Every rating comes from the provider’s published terms, checked against official sources and dated. Partners and non-partners are rated the same way.

Rates and fees35%
FX and international costs20%
Recurring and SaaS features15%
Payment methods15%
Transparency and contract terms15%

How we rate

Payment processing FAQs