Mastercard is reshaping its fee structure in 2026. Some UK merchants will pay more. Others will finally get a break. Here is what the changes actually mean for your business.
If you process card payments in the UK, and the overwhelming majority of UK businesses do, then what Mastercard does with its fee structure is not an abstract industry matter. It lands directly in your monthly statement. And from 2026, that statement is going to look different.
Mastercard has announced a series of updates to its interchange and scheme fee structures that will take effect progressively through 2025 and into 2026. Some changes will push costs higher for specific transaction types. Others represent genuine relief, particularly for smaller merchants who have long subsidised the economics of the card network without receiving much in return. Understanding which category your business falls into is the difference between budgeting correctly and being caught off guard.
Mastercard's fee updates span two distinct layers of cost: interchange fees and scheme fees. These are worth distinguishing clearly, because the industry often conflates them and merchants end up confused about where the money actually goes.
Interchange fees are paid by the merchant's bank (the acquirer) to the cardholder's bank (the issuer) every time a card transaction is processed. The rate is set by Mastercard but the money flows between banks. Under European and UK regulations, these are capped: 0.2% for consumer debit cards and 0.3% for consumer credit cards, per transaction. These caps, inherited from the EU Interchange Fee Regulation and retained in UK law post-Brexit under the retained IFR, are not changing in 2026. That matters, because a lot of commentary conflates regulatory caps with scheme fees and they are not the same thing.
Scheme fees are separate. These are what Mastercard charges directly for the use of its network, its brand, and its infrastructure. They are not capped by regulation in the same way. And this is where 2026 brings meaningful movement.
Mastercard is increasing several of its cross-border and card-not-present scheme fees, particularly affecting transactions where the issuing bank and the acquiring bank are in different regions. For UK merchants processing payments from European-issued Mastercard cards, this has been a live issue since 2021, when Mastercard raised cross-border interchange on UK transactions from EU-issued cards from 0.3% to 1.5% for credit and 0.2% to 1.15% for debit. Those increases were the subject of significant regulatory scrutiny. The 2026 updates build on that foundation, with further adjustments to scheme fee schedules that are expected to affect e-commerce businesses in particular.
For merchants trading online who attract customers from across Europe, the cost per transaction from a European-issued Mastercard card will increase further. According to analysis from The Paypers and merchant banking consultants who have reviewed the updated schedules, the blended increase for affected e-commerce segments could range from 0.05% to 0.15% per transaction depending on card type and routing. That sounds small. On a business processing £500,000 per year in European card-not-present transactions, even a 0.1% increase represents £500 in additional annual cost. Scaling to £5 million in volume, that is £5,000 a year in new fees for doing nothing differently.
The changes are not uniformly punishing. Mastercard is also updating its rules around what the industry calls "merchant-initiated transactions" and recurring payment structures, in ways that should reduce certain processing costs for subscription businesses and platforms.
More meaningfully for everyday UK SMEs, Mastercard is refining its small-ticket and micro-transaction fee tiers. Businesses in sectors like coffee shops, quick-service hospitality, transport, and parking, where average transaction values are low and card processing fees can represent an outsized percentage of each sale, will benefit from adjusted rate structures that better reflect the actual risk and cost profile of these transactions. A flat-rate scheme fee on a £2.50 coffee is genuinely different in economic terms from the same fee on a £250 restaurant bill, and Mastercard's updated tiering acknowledges this more explicitly.
The PSR (Payment Systems Regulator) has been watching this space carefully. Its ongoing market review into card fees, initiated in 2023, produced an interim report in 2024 that flagged scheme and processing fees as an area requiring greater transparency and, potentially, intervention. Mastercard's 2026 updates have been developed in awareness of this regulatory environment. The relief measures for low-value transactions are, at least in part, a response to regulatory pressure rather than spontaneous generosity.
Here is what frustrates most UK merchants about card scheme changes: they happen quietly. Mastercard publishes updates to its rules and fee schedules, but the documents are dense, technical, and not distributed directly to merchants. The information passes through acquirers (your payment processor or bank), who have varying degrees of motivation to translate it clearly.
Under the PSR's transparency requirements and the FCA's Consumer Duty principles, there is a growing expectation that acquirers will communicate fee changes proactively and clearly. In practice, many merchants discover that their effective processing rate has changed only when they compare monthly statements several cycles after a change takes effect.
This is not a minor administrative issue. For businesses operating on thin margins, which describes most UK SMEs, a silent 0.1% increase in processing costs that goes unnoticed for six months has already cost real money that cannot be recovered.
There are four practical steps every UK merchant should take in light of these changes.
First, request a full fee breakdown from your current processor. Ask specifically for a line-by-line breakdown of interchange fees, scheme fees, and processor margins. If your provider quotes you a single blended rate and refuses to itemise, that is a commercial arrangement that almost certainly favours them over you.
Second, identify your transaction mix. What proportion of your card transactions are domestic consumer debit, domestic consumer credit, commercial cards, and cross-border? Each carries different fee implications. If you do not know your mix, you cannot model the impact of 2026 changes accurately.
Third, model the e-commerce exposure specifically. If you sell online and accept cards from European customers, calculate what that volume represents as a proportion of your total revenue. Run the numbers on the potential increases so you are not surprised.
Fourth, review your contract renewal timeline. Many merchant service agreements have 12 to 24-month terms with notice periods. If your contract is up for renewal in 2025, you are in a strong negotiating position. Use the 2026 changes as leverage to negotiate better scheme fee pass-through arrangements with your acquirer.
Mastercard's 2026 changes do not exist in isolation. They are part of a broader repricing of card payment economics that has been underway since Brexit removed the UK from EU-wide interchange regulation in a practical sense. Visa has made parallel adjustments. The PSR is actively investigating whether scheme fees are excessive and whether the duopoly of Visa and Mastercard constrains competition in ways that harm UK merchants and consumers.
The PSR's interim report on scheme and processing fees found that Mastercard and Visa collectively earned around £1.5 billion per year from UK merchants and issuers in scheme fees alone, and that these fees had increased by approximately 30% in real terms between 2017 and 2021. A follow-up review covering 2021 to 2023 data is expected to show further increases.
This is the structural context within which 2026 changes must be understood. The individual adjustments are significant. The direction of travel over the past decade is more significant still. UK merchants have been paying more, year after year, for card acceptance infrastructure that has not fundamentally changed.
Alternative payment rails, open banking-based payments, and real-time account-to-account transfers are growing partly in response to exactly this dynamic. They are not replacing card payments yet, particularly not for in-person retail. But every year that card scheme fees increase, the commercial case for these alternatives becomes slightly more compelling.
For now, cards remain dominant. Understanding precisely what you pay, and why, is the minimum required to manage your business costs intelligently in 2025 and beyond.
Klipy helps UK businesses understand and manage their payment costs with greater clarity. If you would like to review what you are currently paying and whether it reflects the best available terms for your transaction profile, we are happy to start that conversation.
Sources
Disclaimer
The views and information shared in this post are for educational and informational purposes only and do not constitute financial, legal, or professional advice. While every effort is made to ensure accuracy, Klipy UK Limited accepts no liability for decisions made based on this content. Payment processing rates, regulations, and product features referenced are subject to change. Klipy UK is an authorised seller of Teya payment solutions. Where third-party sources are cited, links are provided for reference; Klipy UK does not endorse or guarantee the accuracy of external content. For personalised guidance on your business payment needs, please contact us directly at editor@klipy.uk.
Found this helpful? Share with your network:
This content is published by Klipy UK, a Teya-authorised reseller of payment solutions. The views expressed are for informational purposes only and do not constitute financial advice. All content is the intellectual property of Klipy UK. Reproduction without permission is prohibited.
See exactly how much you could save. Upload your statement or enter your monthly turnover-instant results, no obligation.
Try Calculator