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Interchange-plus pricing is better for most established UK businesses because it separates the true cost of card acceptance (interchange and scheme fees) from the provider's markup, making it transparent and typically cheaper for monthly card turnover above roughly £5,000. Blended pricing suits very new or very low-volume businesses that value a single predictable rate over the potential savings of a more complex structure. The right choice depends on your transaction volume, average transaction value, and the mix of debit versus credit cards your customers use.
Key Takeaways
- Blended pricing charges one flat rate (typically 1.5%-2.75%) on every transaction regardless of card type, making costs predictable but often more expensive.
- Interchange-plus pricing splits costs into interchange fee, scheme fee, and a fixed provider margin, usually saving businesses 0.2%-0.6% per transaction once volumes grow.
- UK debit card interchange is capped at 0.2% and credit at 0.3% under EU-derived caps still applied domestically, so blended rates above 1.5% often hide a large provider margin.
- Businesses processing over £10,000 a month in card sales usually save hundreds of pounds annually by switching from blended to interchange-plus pricing.
- Interchange-plus is harder to compare between providers because you must scrutinise the margin, not just a headline rate, so always ask for the exact basis points on top of interchange.
- Very new businesses or those with unpredictable, low card volumes may still prefer blended pricing for its simplicity and easier budgeting.
- Always request a like-for-like quote using your actual transaction data before switching, since savings depend heavily on your specific card mix.
What Is Blended Pricing?
Blended pricing charges you a single flat percentage on every transaction, regardless of the card type your customer uses. Whether they pay with a basic consumer debit card or a premium corporate credit card, you pay the same rate, commonly somewhere between 1.5% and 2.75% depending on your provider and sector. This simplicity is the main selling point: one number appears on your statement, and you can calculate your fees without needing to understand the underlying cost structure.
The trade-off is that blended rates are set by the provider to cover their worst-case costs plus a healthy margin. Because the rate has to cover expensive commercial and corporate cards as well as cheap consumer debit cards, the provider builds in a buffer. For businesses whose customers mostly pay with standard UK consumer debit cards, this buffer represents pure profit for the provider and unnecessary cost for the merchant.
Who Typically Uses Blended Pricing?
Blended pricing is the default offer from many high-street acquirers and is particularly common among newer businesses, sole traders, and those using simple card machine packages from providers like Worldpay, Barclaycard, or Dojo. It is also the standard model offered by most app-based card readers such as SumUp, Zettle, and Square, where the appeal is a flat, published rate with no negotiation required.
What Is Interchange-Plus Pricing?
Interchange-plus pricing (sometimes called "cost-plus" or "pass-through" pricing) breaks your card processing fee into three separate components: the interchange fee set by the card scheme and paid to the customer's bank, the scheme fee paid to Visa or Mastercard, and a fixed markup charged by your acquirer or payment facilitator. You see all three elements on your statement, rather than one bundled number.
Because interchange fees vary by card type, ranging from 0.2% for UK consumer debit cards to higher rates for commercial and corporate cards, your effective rate under interchange-plus fluctuates transaction by transaction. However, the provider's markup, typically 0.1% to 0.4% plus a small fixed fee per transaction, stays constant. This transparency means you only pay a premium on the transactions that genuinely cost more to process, rather than subsidising expensive cards across your entire turnover.
Understanding the Three Components
Interchange fees are regulated in the UK following the retained EU interchange fee regulation, capping consumer debit cards at 0.2% and consumer credit cards at 0.3%. Scheme fees, charged by Visa or Mastercard for using their network, are smaller but not capped, typically adding 0.05% to 0.15%. The provider's markup is the only genuinely negotiable element and the part you should focus on when comparing quotes. For a full breakdown of these components, see our guide to authorisation, scheme and minimum fees.
Side-by-Side Cost Comparison
The table below illustrates how the two models compare at different monthly card turnover levels, assuming a typical UK retail business with a mix of 70% debit cards and 30% credit cards, and a blended rate of 1.85% versus an interchange-plus rate of interchange plus 0.30%.
| Monthly Card Turnover | Blended Pricing Cost (1.85%) | Interchange-Plus Cost (approx. 0.55% blended average) | Estimated Monthly Saving |
|---|---|---|---|
| £5,000 | £92.50 | £27.50 | £65.00 |
| £10,000 | £185.00 | £55.00 | £130.00 |
| £25,000 | £462.50 | £137.50 | £325.00 |
| £50,000 | £925.00 | £275.00 | £650.00 |
| £100,000 | £1,850.00 | £550.00 | £1,300.00 |
These figures are illustrative and based on typical rates seen across the market, but your actual saving depends heavily on your card mix, average transaction value, and the specific markup your provider offers. A business with a higher proportion of commercial or corporate cards will see a smaller gap between the two models, since interchange-plus costs rise for those card types too.
Why Most Providers Push Blended Pricing
Blended pricing is more profitable for providers precisely because it is simpler to sell and harder for merchants to scrutinise. A single headline rate sounds competitive, but it obscures the fact that the provider is charging a premium on every low-cost debit transaction to cover the rare high-cost commercial card payment. Sales teams at many acquirers are incentivised to sign merchants onto blended plans because the margin is baked in and rarely questioned.
Interchange-plus requires the provider to be transparent about their markup, which invites comparison shopping and negotiation. This is precisely why it tends to benefit merchants more, and why providers rarely lead with it unless a business specifically asks or has meaningful transaction volume to negotiate with. If you are unsure what you are currently being charged, our guide to negotiating card processing fees includes scripts for asking your current provider to break down your rate.
When Blended Pricing Still Makes Sense
Blended pricing is not automatically the wrong choice. For very new businesses with unpredictable or seasonal card volumes, the simplicity of a flat rate can outweigh modest potential savings, particularly if your monthly card turnover is under £3,000 to £5,000. At this level, the pounds saved by switching to interchange-plus may not justify the administrative effort of understanding a more complex statement.
Blended pricing also suits businesses that prioritise absolute budgeting certainty over cost optimisation, such as those forecasting tight margins where a predictable percentage is easier to build into pricing models than a fluctuating one. App-based providers like SumUp and Zettle, which typically only offer blended pricing, can also make sense for businesses with very low or irregular card volumes, such as market traders or pop-up retailers, where contract flexibility matters more than the lowest possible rate.
How to Work Out Which Model Suits Your Business
The decision largely comes down to three factors: your monthly card turnover, your average transaction value, and the proportion of your sales made on premium or commercial cards. Higher volume and higher average transaction values both increase the potential savings from interchange-plus, since the provider's fixed markup makes up a smaller proportion of each transaction as values rise.
Step One: Gather Your Current Statement Data
Look at your last three months of processing statements and identify your total card turnover, number of transactions, and current effective rate. Most UK card machine statements from providers like Worldpay or Barclaycard will show a blended effective rate even if they do not break out interchange separately, so calculate this by dividing total fees by total card turnover.
Step Two: Request an Interchange-Plus Quote
Ask prospective providers, or your current one, for an interchange-plus quote based on your actual transaction data, not a generic estimate. A reputable provider should be able to show you the interchange rates applicable to your typical card mix, the scheme fees, and their proposed markup as a clear, separate line.
Step Three: Compare Total Monthly Cost, Not Just the Headline Rate
Because interchange-plus rates vary by card type, the only meaningful comparison is total monthly cost based on your actual transaction history, not the headline percentage. A provider offering "interchange plus 0.15%" may end up costing more than one offering "interchange plus 0.35%" if the first provider also charges higher fixed per-transaction fees or additional charges. Always ask for a full like-for-like quote covering authorisation fees and any minimum monthly charges, which we cover in detail in our authorisation and scheme fees guide.
Hidden Costs to Watch For in Both Models
Regardless of which pricing structure you choose, both models can carry additional charges that affect your true cost of acceptance. These include authorisation fees charged per transaction attempt (even declined ones), PCI compliance fees, minimum monthly service charges, and early termination fees if you switch providers before your contract ends.
Early termination fees in particular can significantly affect the value of switching from blended to interchange-plus if you are still mid-contract. Some UK providers charge the equivalent of several months' minimum fees to exit early, so it is worth checking your current contract terms before committing to a switch. Our guide to early termination fees explains what these typically cost and how to negotiate them down.
Debit Versus Credit Card Impact on Your Rate
One of the biggest drivers of savings under interchange-plus is your customers' mix of debit and credit card usage. UK consumer debit cards, which dominate everyday retail and hospitality transactions, are capped at 0.2% interchange, while consumer credit cards are capped at 0.3%. Commercial and corporate cards, more common in B2B transactions, carry no cap and can attract interchange fees of 1.5% to 2% or more.
This means a retail shop or café taking mostly consumer debit cards will see dramatic savings under interchange-plus, since their true cost of acceptance is close to 0.2% to 0.3% plus the provider's markup. A B2B services business or wholesaler taking frequent corporate card payments will see a smaller gap between blended and interchange-plus, since their underlying interchange costs are already higher. For a deeper look at how card type affects your rate, see our guide to debit versus credit card fees in the UK.
Making the Switch: Practical Next Steps
If your analysis suggests interchange-plus will save you money, the practical steps are straightforward. Check your current contract for any remaining minimum term and early termination fees, request quotes from two or three providers using your actual transaction data, and compare total monthly cost rather than headline rates. Ensure any new provider gives you a fully itemised statement so you can verify you are genuinely being charged interchange-plus rather than a disguised blended rate with an interchange-plus label.
It is also worth reviewing your card machine or payment gateway contract length before switching, since many UK providers lock merchants into 12, 18, or even 36-month agreements. If you are unsure of the terminology used in any quote you receive, our card processing fees glossary explains every term in plain English.
Frequently Asked Questions
Is interchange-plus always cheaper than blended pricing?
Not always, but it usually is for businesses with meaningful monthly card turnover and a typical UK consumer debit and credit card mix. Businesses with very low volumes or a high proportion of expensive commercial cards may see a smaller gap or occasionally find blended pricing comparable.
How much can a UK business typically save by switching to interchange-plus?
Based on typical UK card mixes, businesses processing £25,000 a month in card sales can save around £300 to £400 monthly by switching from a 1.85% blended rate to a well-negotiated interchange-plus arrangement. Savings scale with volume, so higher-turnover businesses see proportionally larger benefits.
Why do most UK card machine providers default to blended pricing?
Blended pricing is simpler to sell and market with a single headline rate, and it is generally more profitable for providers because the margin is built into every transaction rather than disclosed separately. Interchange-plus requires transparency about the provider's markup, which invites comparison and negotiation that many providers prefer to avoid.
Can I negotiate the markup on an interchange-plus plan?
Yes, the provider's markup is the one genuinely negotiable component of an interchange-plus quote, since interchange and scheme fees are fixed by the card networks and regulation. Businesses with higher card volumes typically have more leverage to negotiate this markup down to 0.10% to 0.20% above interchange.
Does interchange-plus pricing make accounting more complicated?
It does introduce more variability into your monthly statement since the rate changes based on card type, but most modern payment providers supply detailed, itemised statements that make reconciliation straightforward. Many accounting packages can also import these statements directly, reducing the manual effort involved.
Is interchange-plus available for online payment gateways as well as card machines?
Yes, most established UK payment gateway providers offer interchange-plus pricing for online transactions alongside in-person card machine processing, though the specific markup may differ between channels. It is worth requesting separate quotes for your online and in-person volumes if you use both.
Should very small or new UK businesses bother with interchange-plus?
For businesses processing under roughly £3,000 to £5,000 a month in card sales, the pound savings from interchange-plus may be modest, and the simplicity of blended pricing can be more valuable while you establish trading patterns. Once volumes grow beyond this level, it is worth revisiting the decision and requesting an interchange-plus quote.
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