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A merchant account is a specialised bank account that temporarily holds funds from debit and credit card transactions before they are settled into your business current account, typically within one to three working days. Every UK business that wants to accept card payments needs access to one, either directly through an acquiring bank or indirectly through a payment service provider (PSP) that bundles one in. Understanding how a merchant account works, what it costs, and who provides them helps you avoid overpaying and choose the right setup for your business.
Key Takeaways
- A merchant account sits between your customer's card payment and your business bank account, holding funds during authorisation and settlement.
- You can get one directly from an acquiring bank (like Barclaycard or Elavon) or bundled through a PSP (like Stripe, SumUp or Worldpay).
- Traditional merchant accounts often suit higher-turnover businesses better, with lower percentage fees but monthly minimums and contracts.
- PSPs suit smaller and newer businesses with pay-as-you-go pricing, no monthly fees, and same-day approval.
- Settlement typically takes 1-3 working days in the UK, though some providers offer next-day or instant payouts for a fee.
- Fees typically range from 0.3% to 2.9% per transaction depending on card type, business risk, and turnover volume.
- Comparing providers before committing can save UK businesses hundreds or thousands of pounds a year in processing costs.
What Exactly Is a Merchant Account?
In technical terms, a merchant account is an account established under an agreement between a business and a merchant acquiring bank (often just called an "acquirer"), which allows the business to accept payments by debit and credit card. It is not the same as your everyday business bank account. Instead, it acts as a holding area where card transaction funds sit briefly while they are processed, verified, and reconciled before being paid out to you.
When a customer taps, inserts, or enters their card details, that transaction has to travel through several parties: the card network (Visa or Mastercard), the customer's card-issuing bank, and your acquiring bank, before the funds land in your merchant account and are then transferred to your nominated business bank account. This whole journey usually takes a matter of seconds for authorisation, but settlement of the actual funds takes longer.
The Difference Between a Merchant Account and a Business Bank Account
Your business bank account is where you keep your working capital, pay staff, and manage day-to-day cash flow. A merchant account is purely a conduit for card payment funds. Many UK businesses never see their merchant account directly at all, particularly if they use a PSP, because the technology bundles the merchant account function into a single dashboard and payout schedule.
How a Merchant Account Actually Works
Understanding the mechanics helps explain why merchant accounts exist and why fees are structured the way they are. The process generally follows these steps:
1. Authorisation
When a customer pays by card, whether in person, online, or over the phone, the transaction details are sent to the card network, which checks with the card-issuing bank that funds are available and the card is valid. This happens almost instantly.
2. Batching
Authorised transactions are grouped together, usually at the end of the business day, and submitted to the acquiring bank for settlement.
3. Clearing and Settlement
The acquiring bank works with the card networks and issuing banks to move funds from the customer's account into your merchant account. In the UK, this typically takes 1-3 working days, though weekends and bank holidays can extend this slightly.
4. Payout to Your Business Bank Account
Once funds clear in the merchant account, they are transferred (or "swept") into your nominated business current account, minus any fees the acquirer or PSP has deducted.
Throughout this process, fees are deducted at various points, including interchange fees (paid to the card-issuing bank), scheme fees (paid to Visa or Mastercard), and the acquirer or PSP's own markup. For a full breakdown of exactly what appears on your statement, see our guide to merchant account fees explained.
Merchant Account vs Payment Service Provider: What's the Difference?
Many small UK businesses use the terms "merchant account" and "payment service provider" interchangeably, but they are not quite the same thing. A traditional merchant account is provided directly by an acquiring bank and usually requires a separate underwriting process, a contract, and integration with a payment gateway. A PSP, such as Stripe, SumUp, Square, or Worldpay's SMB offering, aggregates many businesses under one master merchant account, allowing individual businesses to sign up quickly without the same underwriting hurdles.
| Feature | Traditional Merchant Account | Payment Service Provider (PSP) |
|---|---|---|
| Setup time | Several days to a few weeks | Same day or next day |
| Typical fees | 0.3%-1.5% per transaction | 1.4%-2.9% per transaction |
| Monthly fees | Often £15-£40 monthly minimum | Usually none |
| Contract length | Often 12-36 months | No contract, cancel anytime |
| Best suited to | Established businesses with £10,000+ monthly card turnover | Startups, small businesses, variable turnover |
| Settlement speed | 1-3 working days | 1-3 working days (instant payout often available for a fee) |
| Example providers | Barclaycard, Elavon, Global Payments, Worldpay Enterprise | Stripe, SumUp, Square, Zettle, Worldpay SMB |
For a deeper comparison, our guide on merchant account vs payment service provider breaks down which option makes more financial sense at different turnover levels.
Who Needs a Merchant Account?
Any UK business that wants to accept card payments, whether in a shop, online, over the phone, or via a mobile card reader, needs a merchant account of some form. This includes:
- Retailers and hospitality businesses taking card payments in-store
- E-commerce businesses selling online
- Tradespeople and service providers taking card payments on-site or by invoice
- Subscription and membership businesses billing customers recurrently
- Charities and membership organisations accepting card donations
Even sole traders and very small businesses now expect to offer card payments, given that cash usage in the UK has continued to decline, with debit cards remaining the most frequently used payment method for in-person transactions according to UK Finance data. Businesses without a merchant account or PSP relationship are effectively locking themselves out of the majority of consumer spending.
High-Risk Businesses
Some sectors, including gambling, adult content, travel, subscription services with high chargeback rates, and certain CBD or vape retailers, are classed as "high risk" by acquirers and PSPs. These businesses may struggle to get approved by mainstream providers and often need a specialist. Our guide to high-risk merchant accounts UK covers what to expect in terms of approval criteria and pricing.
How Much Does a Merchant Account Cost?
Costs vary considerably depending on your provider, business type, turnover, and average transaction value. Broadly, you should expect to pay a combination of the following:
- Transaction fees: A percentage of each sale, typically 0.3%-1.5% for traditional merchant accounts with negotiated interchange-plus pricing, or 1.4%-2.9% for PSPs using blended pricing.
- Monthly account fees: Some acquirers charge £15-£40 a month regardless of usage. Many PSPs charge nothing.
- PCI DSS compliance fees: Often £5-£15 monthly to cover the cost of maintaining payment card security standards.
- Authorisation fees: A small per-transaction charge (often a few pence) some providers add on top of the percentage fee.
- Terminal costs: If you need a physical card machine, this can be a one-off purchase (£29-£200+) or a monthly rental (£10-£40).
- Chargeback fees: Typically £15-£25 per disputed transaction that goes against you.
For businesses processing high volumes, traditional merchant accounts with interchange-plus pricing usually work out considerably cheaper over a year, even accounting for the monthly fees, because the percentage markup is so much lower. For businesses with lower or unpredictable turnover, a PSP's pay-as-you-go model often ends up cheaper overall because there is no fixed monthly cost to cover in quiet periods.
How to Choose the Right Merchant Account for Your Business
Selecting the right setup depends on several factors specific to your business:
Monthly Card Turnover
As a general rule of thumb, businesses processing more than around £10,000-£15,000 a month in card payments will usually save money with a traditional merchant account and interchange-plus pricing, despite the fixed monthly costs. Below that threshold, a PSP's simpler percentage-only pricing tends to work out more cost-effective.
Business Type and Sales Channel
A business selling purely online has different needs to one taking payments face-to-face. Card-present transactions (in a shop, using chip and PIN or contactless) generally attract lower interchange fees than card-not-present transactions (online or phone orders), because the fraud risk is lower. If you sell across multiple channels, look for a provider offering an integrated omnichannel solution.
Contract Flexibility
Traditional merchant accounts often come with 12-36 month contracts and early termination fees, which can be restrictive if your business is growing quickly or still finding its feet. PSPs typically offer month-to-month flexibility, which suits businesses that want to test the waters or that have seasonal or unpredictable trading patterns.
Settlement Speed
If cash flow is tight, faster settlement matters. Some providers offer next-day or even same-day payouts as standard, while others take the full 1-3 working days. This can make a meaningful difference to smaller businesses managing tight margins.
How to Open a Merchant Account in the UK
The application process varies depending on whether you go direct to an acquirer or through a PSP. Generally, you will need to provide:
- Proof of business registration (Companies House number, or sole trader details)
- Business bank account details
- Estimated monthly card turnover and average transaction value
- Details of your business activity and sales channels
- Identification documents for company directors or owners
- Trading history or financial statements, for higher-risk or high-turnover applications
PSPs can often approve applications within minutes to a day, since underwriting is largely automated. Traditional merchant accounts through banks or acquirers typically take longer, often one to three weeks, because of manual underwriting and risk assessment. For a full step-by-step breakdown, see our guide on how to open a merchant account UK.
Switching Providers to Save Money
Many UK businesses stick with their original provider for years without reviewing whether they are still getting a competitive rate. Card processing fees are highly negotiable, particularly for businesses with growing turnover, and providers rarely proactively offer better rates to existing customers. It is worth reviewing your merchant statement every 12 months to check your effective rate against current market benchmarks.
Switching providers is generally straightforward and does not require any interruption to your ability to take payments, provided it is planned properly. Our detailed guide on how to switch merchant account UK walks through the process step by step, including how to avoid early termination penalties.
Common Mistakes UK Businesses Make with Merchant Accounts
Not Comparing Providers
Many businesses accept the first quote they receive, often from their existing bank, without shopping around. Rates for equivalent services can vary by more than a full percentage point between providers, which adds up significantly over a year of trading.
Ignoring the Total Cost of Ownership
Looking only at the headline transaction rate can be misleading. Monthly fees, PCI compliance charges, terminal rental, and minimum monthly charges all add to the real cost, and a seemingly cheap rate can end up more expensive once these are factored in.
Choosing the Wrong Pricing Model for Turnover Level
Small businesses with low and unpredictable turnover sometimes lock themselves into merchant accounts with fixed monthly minimums designed for larger operations, ending up paying for capacity they do not use. Conversely, larger businesses sometimes stay on a PSP's blended pricing for too long, when interchange-plus pricing through a traditional acquirer would be considerably cheaper at their volume.
Merchant Accounts for Small Businesses
Small businesses in the UK are increasingly well served by providers offering simple, low-commitment merchant account solutions. Providers such as SumUp, Zettle, and Square have made card acceptance accessible without contracts or monthly fees, which suits businesses just starting out or those with modest, irregular card turnover. As turnover grows, it is worth revisiting whether a traditional merchant account with negotiated rates would now be more cost-effective. Our guide to the best merchant accounts for small business UK compares the leading options in detail.
Frequently Asked Questions
Do I need a merchant account to accept card payments in the UK?
Yes, in some form. Every business accepting debit or credit card payments needs either a direct merchant account with an acquiring bank or access to one through a payment service provider such as Stripe or SumUp. Without one, you simply cannot process card transactions.
How long does it take to open a merchant account?
PSPs can often approve applications within minutes to 24 hours, since the process is largely automated. Traditional merchant accounts through banks or acquirers typically take between one and three weeks due to manual underwriting, particularly for higher-risk business types.
How much does a merchant account cost per transaction?
Costs typically range from around 0.3% to 1.5% per transaction for traditional merchant accounts using interchange-plus pricing, and 1.4% to 2.9% for payment service providers using blended pricing. The exact rate depends on your card type mix, transaction volume, and risk profile.
Can I get a merchant account with bad credit or as a new business?
Yes, though options may be more limited and rates slightly higher. Payment service providers such as Stripe, SumUp, and Square generally have less stringent underwriting than traditional acquiring banks, making them a practical starting point for newer businesses or those with limited trading history.
How long does it take for funds to reach my bank account?
Most UK merchant accounts settle funds within one to three working days, though this can vary slightly around weekends and bank holidays. Some providers offer faster, even same-day or instant, payouts for an additional fee.
What is the difference between interchange-plus and blended pricing?
Interchange-plus pricing passes on the actual interchange and scheme fees, plus a fixed markup from your provider, which is typically more transparent and cheaper at higher volumes. Blended pricing charges a single flat percentage regardless of card type, which is simpler but usually more expensive overall.
Can I switch merchant account providers without disrupting my business?
Yes, switching can typically be done without any downtime if it is planned properly, including overlapping the old and new accounts briefly during the transition. It is worth checking your existing contract for early termination fees before switching.
How Compare Card Fees Can Help
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Whether you are looking to reduce your card processing costs, switch provider, or understand what you are currently paying, our experts can help. Tell us about your business and we will find the best rates available.
