What is a merchant service provider?

A merchant service provider gives businesses the infrastructure to accept card payments. This includes a payment gateway (the connection between your checkout and card networks), a merchant account (the interim holding account for card funds), and usually hardware (a card reader or terminal). PSPs like Square and Stripe handle the acquiring relationship on your behalf.

Do I need a merchant account to accept card payments?

Not a dedicated one. Payment service providers like Square, SumUp, and Stripe maintain a pooled merchant account. You benefit from the same functionality without the underwriting process that individual merchant accounts require. A dedicated merchant account from an acquirer like Worldpay may offer lower rates at high volume but takes longer to set up.

What is the cheapest merchant service for a small business?

For low volume: SumUp Air at 1.69% PAYG with a £14.99 reader. For medium-to-high volume: Tide Card Reader on Sell In-Person at 0.79% + 3p. Both are no-contract and available online within an hour.

Who is Stripe best suited for?

Stripe suits businesses with advanced API integration needs: subscription billing, multi-currency payments, marketplace payouts, and developer-built checkout flows. There is no monthly fee on the standard plan and no contract. Standard settlement is 3 business days; instant payouts are available for a 1% fee (minimum 40p). We recommend Stripe primarily for online-first and developer-led businesses. It does not assign dedicated account managers, so if you prefer a managed relationship consider TakePayments or Worldpay.

Can a payment facilitator freeze my funds?

Yes. Payment facilitators like Stripe, Square, and SumUp use automated risk monitoring. Unusual chargeback rates, high-risk industry flags, or sudden volume spikes can trigger automatic account reviews or fund holds. If cash flow certainty is critical, a traditional acquirer such as Worldpay or TakePayments is more predictable, though it requires a contract and underwriting.

Is my money safe with a payment provider?

Most card processors and e-money firms safeguard customer funds in ring-fenced accounts rather than as FSCS-protected bank deposits. From 7 May 2026, the FCA tightens this with new rules requiring payments and e-money firms to keep stricter records and reporting on the money they hold for you. It is not the same as FSCS cover, but it raises the bar on how your cash is ring-fenced. We would still sweep large balances to your own bank account.

Best Merchant Service Providers UK 2026: Square No Contract

Item: Square Reader
Rating: 4.1
Author: Business Expert

Provider	In-person rate	Monthly fee	Hardware	Contract	Best for	Action
Top PickSquare Reader	1.75% flat	£0 (Plus £29)	£19 +VAT	No lock-in	Small businesses, free POS	Visit →
Tide Card Reader	0.79% + 3p (plan)	£12.99/month or £0	£19.99 +VAT	No lock-in	Lowest rate at volume	Visit →
SumUp Air	1.69% (0.99% on plan)	£0 or £19/month	£14.99 +VAT	No contract	Cheapest entry point	Visit →
myPOS Go 2	1.45%	£0	£39 +VAT	No contract	Standalone 4G mobile	Visit →
Takepayments	Quote-based	Quote-based (terminal incl.)	Included	18 months	High-volume with account manager	Visit →
Stripe	1.4% + 10p (EEA, Terminal)	None	From £59	No contract	Online-first and developer use cases	Visit →
Worldpay	Quote-based	£15–£22.50 + terminal	Rented	12–36 months	Established businesses needing an acquirer	Visit →

Our score:4.1 / 5i

How to Choose a Merchant Service Provider

Which provider wins comes down to your monthly card volume and how you trade. If you take under about £100,000 a year, a pay-as-you-go provider like Square or SumUp is almost always cheaper for you, and you skip contracts and monthly fees entirely.

Above roughly £200,000 a year, get a quote from an acquirer such as Worldpay or Takepayments, where the rate you negotiate can beat flat PSP pricing. Ask what your effective rate is once authorisation, settlement and PCI fees are added, not just the headline number you see advertised.

If you also sell in person, check the hardware and settlement terms before you commit. You want a reader that suits how you trade: SumUp or Square for the cheapest entry, myPOS if you need the money in your account the same day.

Best merchant service provider picks by business type

Best for small businesses: Square

Square’s 1.75% flat rate, £19 reader, and free POS app make it the most complete no-contract merchant service for businesses below £4,000/month in card volume.

The hospitality POS features (table management, modifiers, split bills) are free. No underwriting, no account manager required, no monthly fee.

Visit Square

Best for high volume: Tide Card Reader

Tide’s Sell In-Person plan at 0.79% + 3p is the lowest published in-person rate in the UK without a custom contract. At £5,000/month in card sales, total cost is £52.50 including the £12.99 plan fee, vs £87.50 with Square at 1.75% PAYG. The break-even against PAYG is around £1,850/month.

Visit Tide

Cheapest hardware entry point: SumUp Air

SumUp Air at £14.99 is the cheapest mainstream card reader in the UK. The 1.69% PAYG rate is lower than Square’s 1.75%. The Payments Plus plan at £19/month drops the rate to 0.99%, break-even at £2,714/month. For a business that wants to start as cheaply as possible, SumUp is the answer.

Visit SumUp

Best merchant service provider profiles

Square Reader

Top Pick

Best for: Small businesses wanting a free POS app and no monthly fees

Watch out: 1.75% flat becomes expensive above ~£6,000/month: no volume discount exists

Not ideal if: High-volume sellers who would benefit from Dojo or other negotiated per-transaction rates

Eligibility: UK businesses: sole traders, partnerships, and limited companies. Account holders must be 18 or over. Custom rates available for businesses processing over £200,000 annually. Prohibited categories include firearms and other restricted activities: see Square’s Acceptable Use Policy.

Not ideal if: High-volume sellers who would benefit from Dojo or other negotiated per-transaction rates

Watch out: 1.75% flat becomes expensive above ~£6,000/month: no volume discount exists

No monthly fee and no contract: zero downside risk while testing card acceptance

Free POS app usable from day one: most owners taking payments within an hour

Amex accepted at the same 1.75% rate: no surcharge or separate policy needed

Software ecosystem (online store, invoices, appointments) on the same account, no extra fees

1.75% flat becomes expensive above roughly £6,000/month in card takings

Settlement is 1–2 working days unless you pay extra for instant transfer

Bluetooth-to-phone means a flat battery or dropped app stops checkout

Tide Card Reader

Low-fee option

Best for: Tide business account holders taking regular in-person payments, plan rate (0.89% + 3p) makes sense above roughly £2,500/month in card sales

Watch out: No Amex acceptance and 3-day standard settlement are hard stops for many businesses

Not ideal if: Businesses whose customers regularly pay by Amex, or any business not banking with Tide

Sell In-Person plan at 0.89% + 3p is among the lowest rates in this guide, and the lowest bundled with a full business account

Lifetime 4G SIM removes the phone-tether failure mode entirely

Settles directly into the Tide account, one balance, one reconciliation

£59 introductory hardware price undercuts most rental alternatives

No Amex acceptance, a hard stop for hospitality, salons, and premium retail

Requires a Tide business account, means a bank switch for most applicants

Standard settlement is three working days unless you pay for the next-day add-on

SumUp Air

Best for Startups

Best for: Sole traders and startups wanting the lowest hardware entry cost

Watch out: Battery degrades in cold weather and Bluetooth fails if phone dies mid-shift

Not ideal if: Businesses expecting to scale past £5,000/month quickly, a plan switch will be needed

£15 hardware price is the lowest entry point on the market

Next-day 7am settlement is faster than Square’s standard 1–2 working days

Payments Plus at 0.99% is a credible upgrade path above £4,000/month

Amex accepted at the flat rate, no separate premium-card policy needed

Hardware battery degrades in cold weather, unreliable on winter outdoor markets

Bluetooth-to-phone fails if the phone dies on a busy shift

Payments Plus break-even is £3,800/month, most small users should not subscribe

SumUp Air reader at £19, one of the cheapest card readers available in the UK; pairs with the free SumUp app on iOS and Android

Free SumUp POS app, sales reports, item library, basic inventory and team management included with no subscription

Next-day settlement at 7am on every plan, or instant payout to a SumUp business account at no extra cost

Payments Plus subscription at £19/month drops the per-transaction rate to 0.99%, best for businesses processing above £3,300/month

Accepts all major debit and credit cards including Amex, plus Apple Pay and Google Pay, at the same flat rate

myPOS Go 2

Best for Mobile

Best for: Mobile and outdoor businesses needing a self-contained 4G reader with no monthly fees and instant access to funds via the myPOS account

Watch out: Funds land in myPOS e-money account first, separate transfer needed to reach a high-street bank

Not ideal if: Businesses already managing till, bookings and accounting from a phone or tablet

Built-in 4G SIM means the reader works without a phone, without WiFi, without a tether

1.10% + 7p beats every flat-rate competitor on transactions above roughly £14

Instant (sub-3-second) settlement to the myPOS account

Physical keypad and screen more durable than phone-reliant alternatives

Funds sit in myPOS, a separate transfer is needed to reach a high-street bank account

Fixed 7p per-transaction fee makes small takings proportionally more expensive

POS app is functional but less developed than Square’s for food or hospitality

Takepayments

Bespoke pricing

Best for: Established UK businesses wanting managed setup, UK-based 7-day support, and a single point of contact for card machines and online payments

Watch out: No published pricing, first quote is rarely the best; requires a sales call to compare

Not ideal if: Businesses doing under £4,000/month or wanting published pricing before a sales call

UK-based support with assigned account management, useful when something actually breaks

Terminals include 4G as standard, not as an optional add-on

Rates are negotiable, favours higher-volume businesses willing to push back

12-month contract with no published pricing, cannot compare without a sales call

First quote is rarely the best quote, puts time cost on the buyer

No obvious edge for businesses doing under £4,000/month, likely more expensive than Square

Stripe Terminal

Best for: Tech-forward businesses that already use Stripe online and want a unified payment stack

Eligibility:

UK-registered businesses: sole trader, Ltd, LLP, charity, or partnership
UK bank account in the business name required for payouts
No minimum trading history or revenue threshold for standard accounts
High-volume merchants moved to Stripe Custom with bespoke underwriting
Restricted categories: adult content, regulated gambling, firearms, MLM, unregulated CBD, and any business on the FCA restricted activities list
Stripe Capital and Stripe Issuing are invitation-only based on processing history (typically 3+ months at £10k+/month)
KYC/KYB via Companies House cross-check; 1-3 business days from sign-up to first live transaction in most cases

1.4% + 10p for EEA card-present transactions, competitive without a monthly commitment

Unified dashboard: online and in-person payments in one place with consolidated reporting

Stripe Radar fraud detection included, no extra fee

No monthly fee and no contract, suits variable or seasonal transaction volumes

Tap to Pay on iPhone and Android eliminates the need for dedicated hardware

Custom Terminal integration requires SDK development, not a no-code out-of-box setup

2.9% + 10p for non-EEA cards, expensive for businesses with international customers

Standard settlement takes 3 business days; instant payout costs 1% (minimum 40p)

New accounts face a 7-day holding period before first payout

Account holds can freeze both online and in-person payment channels simultaneously

Worldpay

High-volume option

Best for: Merchants processing tens of thousands of transactions a month who need scale, offline capture, and a reporting suite for a finance team

Watch out: 18-month contract is the longest on the market, setup takes weeks, not minutes

Not ideal if: Sole traders and small businesses, 18-month contract and slow onboarding are excessive for low volumes

Offline transaction capture, useful for businesses in patchy-signal locations

Tailored rates become competitive at high volume (£20k+/month)

Reporting and chargeback handling designed for merchants with dedicated finance teams

18-month contract is the longest on this list and the hardest to exit early

Setup and onboarding are slower than fintech competitors, weeks, not minutes

POS integrations require direct confirmation for your specific setup

Accepts all major card schemes including Visa, Mastercard and Amex

Offline transaction capture, stores payments when connectivity drops

Worldpay Business Manager portal with reporting and chargeback management

Multi-currency acceptance with settlement in GBP or original currency

Integrates with major UK EPoS systems including EPOS Now and Lightspeed

Dedicated UK account management on higher-volume contracts

Merchant service provider fees in depth

The cost of card acceptance has three layers: the card network interchange fee, the acquiring bank’s margin, and any software or hardware fees.

Payment service providers (PSPs) like Square, SumUp, Tide, and Stripe pool their merchant relationships and pass through a flat blended rate. Traditional acquirers like Worldpay and TakePayments quote interchange-plus or blended rates based on your card mix and volume.

For businesses processing under £100,000/year: a flat-rate PSP is almost always cheaper and faster to set up.

For businesses above £200,000/year: a custom acquiring quote from Worldpay, TakePayments, or Dojo may produce lower effective rates, especially with a high proportion of low-cost debit transactions.

Stripe offers custom pricing for businesses processing above £100,000/year; below that threshold, the standard published rates apply.

Merchant service provider features compared

POS software

Square has the deepest free POS software: table management, modifiers, open tabs, appointments, and loyalty. SumUp POS Lite covers basic counter service.

Tide, myPOS, and Stripe Terminal handle transactions and reporting but are not EPOS platforms. Worldpay and TakePayments integrate with most third-party EPOS systems rather than providing one themselves.

Settlement and funding speed

myPOS settles to its wallet instantly. SumUp settles next day at 7am. Tide settles next working day.

Square settles in 1–2 working days. Stripe settles in 3 business days as standard; instant payouts are available for a 1% fee (minimum 40p), settling within around 30 minutes. TakePayments and Worldpay settle next working day as standard.

Payment facilitators like Stripe, Square, and SumUp use algorithmic monitoring to manage risk. Unusual chargeback patterns or flags against your industry profile can trigger automatic fund holds or account reviews.

Stripe also publishes a prohibited and restricted business list. Gambling and similar games of chance are barred outright, while regulated products such as CBD are allowed only within strict limits. Expect a facilitator to decline or later close an account in a listed sector.

We rate traditional acquirers like Worldpay or TakePayments higher for businesses where cash flow predictability is critical, though they require underwriting and contracts.

Frequently asked questions

What is a merchant service provider?
A merchant service provider gives businesses the infrastructure to accept card payments. This includes a payment gateway (the connection between your checkout and card networks), a merchant account (the interim holding account for card funds), and usually hardware (a card reader or terminal). PSPs like Square and Stripe handle the acquiring relationship on your behalf.
Do I need a merchant account to accept card payments?
Not a dedicated one. Payment service providers like Square, SumUp, and Stripe maintain a pooled merchant account. You benefit from the same functionality without the underwriting process that individual merchant accounts require. A dedicated merchant account from an acquirer like Worldpay may offer lower rates at high volume but takes longer to set up.
What is the cheapest merchant service for a small business?
For low volume: SumUp Air at 1.69% PAYG with a £14.99 reader. For medium-to-high volume: Tide Card Reader on Sell In-Person at 0.79% + 3p. Both are no-contract and available online within an hour.
Who is Stripe best suited for?
Stripe suits businesses with advanced API integration needs: subscription billing, multi-currency payments, marketplace payouts, and developer-built checkout flows. There is no monthly fee on the standard plan and no contract. Standard settlement is 3 business days; instant payouts are available for a 1% fee (minimum 40p). We recommend Stripe primarily for online-first and developer-led businesses. It does not assign dedicated account managers, so if you prefer a managed relationship consider TakePayments or Worldpay.
Can a payment facilitator freeze my funds?
Yes. Payment facilitators like Stripe, Square, and SumUp use automated risk monitoring. Unusual chargeback rates, high-risk industry flags, or sudden volume spikes can trigger automatic account reviews or fund holds. If cash flow certainty is critical, a traditional acquirer such as Worldpay or TakePayments is more predictable, though it requires a contract and underwriting.
Is my money safe with a payment provider?
Most card processors and e-money firms safeguard customer funds in ring-fenced accounts rather than as FSCS-protected bank deposits. From 7 May 2026, the FCA tightens this with new rules requiring payments and e-money firms to keep stricter records and reporting on the money they hold for you. It is not the same as FSCS cover, but it raises the bar on how your cash is ring-fenced. We would still sweep large balances to your own bank account.

How we reviewed Best Merchant Service Providers UK 2026

Ranking criteria. We ranked providers on cost, eligibility, features, and ease of access. Cost and protection carry the heaviest weight because these matter across every business type and rarely change with reader preferences.

Data sources. Every provider’s pricing page, terms, and product docs were checked directly in May 2026. No comparison sites, no press releases, no affiliate material. FCA register cross-checked for regulatory status.

Update cadence. We re-verify every provider on this page at least monthly, and whenever a provider changes pricing, eligibility, or terms. The verification date on the page reflects the most recent full review. Some links on this page are affiliate links, see our editorial policy.

Best Merchant Service Providers UK 2026

Best merchant service providers compared