Why there is no single SME rate
A dependable market-average effective rate is not available for every type of UK SME. The outcome depends on average transaction value, card mix, payment channel, fixed fees, provider and contract.
A cafe with a low average ticket and mostly consumer debit cards has a different cost structure from a B2B service firm accepting corporate cards. The fair test is your real statement against like-for-like written quotes using the same inputs.
How cost drivers differ by sector
| Business type | Cost characteristic | What to check |
|---|---|---|
| Cafes and quick-service food | Many low-value transactions | Per-item authorisation charges |
| Independent retail | In-person card mix and fixed hardware | Terminal rental and card categories |
| Restaurants and pubs | Portable hardware and varied tickets | Device count, tipping and business cards |
| Hair and beauty | Appointments and quieter months | Minimum monthly charges and payment links |
| Trades and mobile | Payments away from a fixed site | Connectivity, device ownership and flat pricing |
| E-commerce | Card-not-present acceptance | Gateway, fraud tools and domestic/international pricing |
| B2B services | Larger values and commercial cards | Commercial-card pricing and virtual terminal charges |
What shapes the total cost
Old rates that never got reviewed
Many SMEs are on rates set five or more years ago, while the market has moved.
Long terminal contracts
A £35/month terminal on a 48-month deal is £1,680 of committed cost.
Premium and international card surcharges
Particularly relevant in hospitality and tourist-area retail.
Non-compliance PCI fees
£20-£40/month applied when the annual self-assessment lapses.
Monthly minimums in quiet months
Seasonal or holiday-hit months quietly inflate the effective rate.
How to benchmark your own costs
Take your last three months of statements. Add every card-related line - transaction fees, authorisation, PCI, minimum, terminal, gateway, refund and chargeback fees - and divide by total card turnover. That is your effective rate.
Use that number as your baseline. Reprice the same transaction mix under each written quote and include all fixed, per-item and equipment charges before judging the result.
Key takeaways
- Effective rate is the only honest benchmark.
- Review every 18–24 months at a minimum.
- Terminal hire and recurring fees usually explain more of the gap than the transaction rate itself.
Want to understand what you are actually paying?
Send your latest merchant statement and Card Payment Connect will assess the charges, pricing structure and contract information available.
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