The UK card-acquiring market is highly concentrated. Three players, Worldpay, Barclaycard and Global Payments, hold around 71% of UK merchant acquiring (Nilson), and the CMA approved the Worldpay–Global Payments merger in October 2025, tightening it further. The real story for merchants: the part of your card bill you can actually negotiate, the acquirer margin, sits in a market with limited competition.
How concentrated the market is, the merger that concentrated it further, and the size of the margin merchants can negotiate.
Three acquirers dominate UK card processing, and the 2025 merger reduces that to a tighter group still.
| Measure | Value | Period |
|---|---|---|
| Top three acquirers' combined share | ~71% | 2025 |
| The top three | Worldpay, Barclaycard, Global Payments | 2025 |
| Worldpay–Global Payments merger | CMA-approved | 20 Oct 2025 |
Concentration matters because acquiring is where merchants are supposed to find competition on price. With three players holding around 71%, and two of them now merging, the competitive pressure on the negotiable part of the card bill is limited, especially for smaller merchants with less bargaining power. The scheme-fee side, also rising, sits on UK card scheme fee statistics.
The acquirer's margin is the part of the merchant service charge that competition is meant to discipline. It is also the smallest of the three components.
| Component | Who sets it | Can you negotiate it? |
|---|---|---|
| Interchange | Capped by law | No (fixed by regulation) |
| Scheme fees | Visa, Mastercard | No (set by the networks) |
| Acquirer margin | Your acquirer | Yes (the negotiable part) |
| Merchant service charge | All three combined | Partly |
Concentration limits choice, but it does not remove it. The lever merchants still have is the pricing model and the margin.
Acquirer pricing is commercially sensitive and patchily disclosed. Two cautions keep the figures honest.
The 0.05% to 0.20% acquirer margin is indicative, drawn from interchange-plus disclosures, not a published universal rate; the PSR does not publish a UK acquirer margin range because the data is commercially sensitive and redacted. The 0.14 pence per transaction is the British Retail Consortium's figure for large retailers, who are on interchange-plus contracts with fixed per-transaction fees. It is not what a typical small business pays, and reading it as the SME rate would badly understate small-merchant costs.
Market share comes from Nilson Report ranking data and the CMA merger decision; the margin and per-transaction figures from interchange-plus disclosures and the BRC Payments Survey.
| Source | Publisher | Period covered | Type | Last checked |
|---|---|---|---|---|
| Card-issuer and acquirer ranked tables | Nilson Report | 2025 | Market data | 3 Jun 2026 |
| Worldpay–Global Payments merger decision | CMA | Oct 2025 | Regulator | 3 Jun 2026 |
| Payments Survey (acquirer fees) | British Retail Consortium | 2024 | Trade body | 3 Jun 2026 |
The ~71% top-three share comes from Nilson Report ranking data; the merger approval and date from the CMA decision.
The 0.05–0.20% margin is indicative from interchange-plus disclosures, not a published universal rate. The 0.14p figure is the BRC's large-retailer benchmark, labelled as such.
The market-share figure is an estimate from ranking data, and we note that precise figures vary by source and definition.
Concentration maps to Nilson and the CMA; fee figures to interchange-plus disclosures and the BRC. Margins are labelled indicative, the 0.14p figure is flagged as a large-retailer benchmark not an SME rate, and the share figure is presented as an estimate. Last full review: 3 Jun 2026.