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Payment gateway costs in the UK typically range from 1.5% to 3.5% of transaction value, plus a monthly fee of £0-£30 and sometimes a separate gateway fee of £10-£25 per month on top of your card processing rate. The exact figure you pay depends on your provider's pricing model, your monthly card turnover, your average transaction size, and whether you are billed on an interchange-plus, blended, or fixed-fee structure. This guide breaks every component down so you can see exactly what you should be paying and where providers commonly add hidden costs.
Key Takeaways
- UK payment gateway costs are made up of at least four separate elements: a transaction percentage, a per-transaction fixed fee, a monthly gateway or account fee, and sometimes a PCI compliance charge.
- Blended pricing looks simple but usually costs more than interchange-plus once monthly card turnover exceeds around £10,000.
- Authorisation fees, refund fees, and chargeback fees are rarely advertised but appear on almost every UK merchant statement.
- Small businesses processing under £5,000 a month are often better served by a flat-rate provider, while businesses above £15,000 a month should push for interchange-plus pricing.
- Minimum monthly service charges can quietly cost seasonal and low-volume businesses hundreds of pounds a year if turnover dips below the threshold.
- Switching providers or renegotiating annually can reduce total gateway costs by 20-40% for businesses that have never reviewed their statement line by line.
- Comparing total cost of ownership, not just the headline transaction rate, is the only reliable way to judge whether a gateway is genuinely competitive.
Why Payment Gateway Pricing Is So Hard to Compare
UK payment gateway providers rarely present their pricing in a consistent format, which makes like-for-like comparison genuinely difficult for business owners. Some providers, particularly newer fintech players such as Stripe and SumUp, quote a single all-in percentage that includes the gateway, processing, and acquiring costs. Others, more common among traditional merchant service providers and acquiring banks, itemise a card processing rate, a separate payment gateway licence fee, a PCI DSS compliance fee, and a statement or account maintenance fee.
This inconsistency means a headline rate of "1.5%" from one provider might genuinely be cheaper than a competitor's "2.9%", but it could also be more expensive once monthly fees, minimum charges, and authorisation costs are added back in. The only way to compare fairly is to calculate the total monthly cost at your actual transaction volume and average order value, which is exactly the approach we use when comparing providers for UK businesses.
The Components of Payment Gateway Cost
1. Transaction Fee (Percentage)
The percentage charged on each card payment is usually the largest cost element and is often the only figure providers advertise prominently. In the UK this typically ranges from 1.4% for large-volume businesses on interchange-plus pricing up to 2.9% or more for small businesses on blended or flat-rate plans. Premium cards, business cards, and international cards usually attract a higher percentage than standard UK consumer debit cards.
2. Per-Transaction Fixed Fee
Many gateways add a small fixed fee on top of the percentage, commonly between 0p and 20p per transaction. This matters far more for businesses with a high volume of low-value transactions, such as cafes or quick-service retailers, than for businesses selling high-ticket items infrequently.
3. Monthly Gateway Fee
This is a fixed charge, typically £10-£25 a month, for access to the payment gateway platform itself, separate from card processing. Some providers waive this fee entirely as part of an all-in-one package, while others charge it regardless of how many transactions you process, making it a poor deal for low-volume or seasonal businesses.
4. PCI DSS Compliance Fee
Most acquirers and gateway providers charge a PCI compliance fee, typically £5-£15 a month, to cover the cost of maintaining Payment Card Industry Data Security Standard compliance. Some providers bundle this into the monthly gateway fee, while others list it as a separate line item, and a small number waive it if you complete an annual self-assessment questionnaire yourself.
5. Authorisation Fees
Some providers charge a small fee, often 1p-5p, for every authorisation request sent to the card network, regardless of whether the transaction is successful. This is one of the most commonly hidden costs because it applies even to declined transactions, which can add up for businesses with a higher-than-average decline rate.
6. Refund and Chargeback Fees
Processing a refund often incurs a fee even though the transaction itself generated no revenue, typically 10p-30p per refund. Chargeback fees are significantly higher, commonly £15-£25 per dispute, and are charged whether or not the merchant ultimately wins the dispute.
7. Minimum Monthly Service Charge
Some providers guarantee themselves a minimum monthly revenue by charging a shortfall fee if your transaction fees do not reach a set threshold, commonly £20-£30. This structure penalises seasonal businesses and those with fluctuating turnover, and it is one of the least visible costs until it appears on a statement.
Real Cost Comparisons at Different Volume Levels
The table below illustrates how total monthly gateway cost can vary significantly at different turnover levels, using representative UK pricing structures rather than a single named provider's exact rates, since rates are typically negotiated individually above certain volumes.
| Monthly Card Turnover | Pricing Model | Typical Blended Rate | Monthly Gateway Fee | Estimated Total Monthly Cost |
|---|---|---|---|---|
| £2,000 | Flat-rate / all-in-one | 2.9% + 20p per transaction | £0 | Approx. £58-£70 |
| £5,000 | Blended | 2.2% + 10p per transaction | £15 | Approx. £110-£130 |
| £15,000 | Blended or entry interchange-plus | 1.8% + 8p per transaction | £20 | Approx. £280-£310 |
| £50,000 | Interchange-plus | Interchange + 0.4% margin | £25 | Approx. £650-£750 |
| £150,000+ | Negotiated interchange-plus | Interchange + 0.2-0.3% margin | £25-£30 | Approx. £1,600-£1,900 |
These figures assume an average transaction value of around £25-£40 and a typical mix of UK consumer debit and credit cards. Businesses with a higher proportion of commercial cards, international cards, or American Express transactions should expect costs at the higher end of each range, since interchange rates for these card types are significantly above standard UK consumer debit interchange.
Blended vs Interchange-Plus: Which Costs Less?
Blended pricing charges a single flat percentage regardless of card type, which makes budgeting simple but means the provider absorbs the risk of cheaper cards while charging you the same rate on all of them, effectively overcharging you on lower-cost transactions to cover their margin. Interchange-plus pricing passes through the actual interchange fee set by Visa or Mastercard and adds a fixed margin on top, meaning you pay less when a customer uses a low-interchange debit card and more when they use a premium credit card.
For businesses processing under roughly £5,000-£10,000 a month, the simplicity of blended pricing often outweighs the modest savings interchange-plus could offer, particularly since many interchange-plus providers require a monthly minimum or setup process that is not worth it at low volumes. Above this threshold, interchange-plus almost always works out cheaper, sometimes by 15-30%, because the average UK transaction mix is weighted towards lower-cost debit cards. For a deeper breakdown of how gateway choice affects overall processing costs, see our guide to best payment gateways UK.
Hidden Charges That Catch UK Businesses Off Guard
Cross-Border and Currency Conversion Fees
If you accept international cards or sell in multiple currencies, many gateways add a cross-border fee of 0.4-2% on top of the standard rate. This is rarely mentioned in headline pricing and can significantly inflate costs for businesses with a meaningful proportion of overseas customers.
Early Termination Fees
Contracts tied to a fixed term, commonly 12-36 months, often include an early termination fee if you switch provider before the contract ends. These can range from a flat £50-£100 charge to a calculation based on the remaining contract value, and they are a major reason businesses stay locked into uncompetitive pricing longer than necessary.
Statement and Paper Billing Fees
A small number of providers still charge for paper statements or annual account reviews, typically £5-£10 a month, which is an easy saving simply by switching to electronic statements.
Batch and Settlement Fees
Some gateways charge a small fee per settlement batch, which is more relevant to businesses processing very high daily transaction counts but is worth checking if your provider settles funds multiple times per day.
How Business Type Affects Your Gateway Costs
The right gateway setup, and therefore the right cost structure, depends heavily on how you take payments. Ecommerce businesses typically need a hosted or embedded checkout integration with strong fraud tools, which our guide to ecommerce payment gateways UK covers in detail. Businesses taking phone or mail order payments have different requirements entirely, since card-not-present risk is higher and interchange rates reflect that; our MOTO payments UK guide explains how these costs differ. If you are deciding between a fully hosted checkout page and a self-hosted integration built into your own site, the cost and security trade-offs are explored in our hosted vs self-hosted payment gateways comparison.
How to Reduce Your Payment Gateway Costs
Request an Itemised Statement
Ask your current provider for a fully itemised monthly statement broken down by card type, transaction fee, and any additional charges, rather than accepting a single blended total. This is the only reliable way to identify which cost components are inflating your bill and gives you concrete figures to negotiate with or to compare against alternative providers.
Match Your Pricing Model to Your Volume
Businesses processing under £5,000 a month are usually better served by a simple flat-rate or all-in-one provider, while those above £15,000 a month should actively seek out interchange-plus pricing and negotiate the margin. Reassess this annually, since growing businesses often outgrow their original pricing structure without realising a cheaper option is now available to them.
Negotiate Annually
UK payment providers frequently offer better rates to businesses that show they are prepared to switch, and existing customers rarely receive automatic rate reductions as their volume grows. Reviewing your contract every 12 months, and using a comparison of current market rates as leverage, typically secures a meaningfully better deal than staying passive.
Check for Contract Lock-In Before Signing
Before committing to any provider, confirm the contract length, any early termination fee, and whether pricing is fixed or subject to unilateral increases. A slightly higher rate with no lock-in is often better value than a marginally cheaper rate tied to a 36-month contract with a punitive exit fee.
What a Fair UK Payment Gateway Quote Should Include
A transparent quote should clearly separate the transaction percentage, the fixed per-transaction fee, the monthly gateway fee, the PCI compliance fee, and any refund, chargeback, or authorisation charges. It should also state the contract length, any early termination fee, and whether the rate is fixed for the contract term or subject to review. If a provider is unwilling to provide this level of detail before you sign, that alone is a strong signal to look elsewhere or to seek an independent comparison first.
Frequently Asked Questions
What is the average payment gateway cost for a small UK business?
Most small UK businesses processing under £5,000 a month pay between 1.9% and 2.9% per transaction, plus a monthly fee of £0-£20 depending on the provider and pricing model chosen. Flat-rate providers with no monthly fee are often the most cost-effective choice at this volume level.
Is interchange-plus pricing always cheaper than blended pricing?
Not always. Interchange-plus tends to be cheaper for businesses processing above roughly £10,000-£15,000 a month, but at lower volumes the fixed costs and complexity of interchange-plus can outweigh the savings, making blended or flat-rate pricing more practical.
Do all UK payment gateways charge a monthly fee?
No. Many modern providers, including several flat-rate fintech gateways, charge no separate monthly gateway fee and instead build all costs into a single transaction percentage. Traditional merchant service providers more commonly charge a monthly fee alongside a lower headline transaction rate.
Why do I get charged a fee for refunds and chargebacks?
Refund fees cover the administrative and processing cost of reversing a transaction, even though no new revenue is generated, while chargeback fees cover the cost of handling a formal dispute raised through the card scheme. Both are standard practice across UK providers, though the exact amounts vary considerably between providers.
Can I negotiate payment gateway fees in the UK?
Yes, and most UK businesses never do. Providers routinely offer better rates to businesses that demonstrate they are comparing alternatives, so requesting a renegotiation annually, backed by current market rate comparisons, typically results in a meaningful reduction.
What is a PCI compliance fee and can I avoid it?
A PCI compliance fee covers the cost of maintaining Payment Card Industry Data Security Standard compliance on your account, and most providers charge it as a standard monthly amount. Some providers waive or reduce this fee if you complete the annual self-assessment questionnaire yourself rather than relying on their managed compliance service.
How do I know if my current gateway is overcharging me?
The clearest way is to request a fully itemised statement and compare your effective rate, total fees divided by total processed volume, against current market benchmarks for your turnover level and business type. An independent comparison service can quickly identify whether your current provider's pricing is competitive or significantly above market rate.
How Compare Card Fees Can Help
Compare Card Fees is a free, independent advisory service. We compare rates from leading UK payment providers to find you the best deal available - no fee, no obligation.
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.
