The biggest fintech companies in the UK, 2026
The UK's biggest fintech companies ranked by the turnover in their own filed Companies House accounts. Fintech has no SIC code of its own, so this is a curated registry — neobanks, payments, lending, wealthtech and trading platforms — tagged by type, with neobank figures shown as operating income and payments as net revenue.
What the filings show
This is the fastest-growing list we publish: 14 of the 24 companies with comparable years grew more than 20%, and the leaders are no longer startups. Revolut filed £3.31B in its UK entity, Monzo crossed a billion, and the once-perennial losses are turning to profits across the challenger banks. UK fintech has grown up.
Read the tags before the totals. The 6 challenger banks (Revolut, Monzo, Starling, OakNorth, Allica, Tandem) are shown on operating income — the bank measure of net interest plus fees — while the payment companies are shown on net revenue: Wise's £1.23B is its take rate, not the hundreds of billions it actually moves. Comparing a neobank's income with a payment firm's volume would be meaningless, so we don't.
The growth table — Trading 212 (+72%), iwoca (+64%), Marshmallow (+57%), Tide (+56%), Plum (+50%) — spans every sub-sector: trading platforms riding retail-investor volumes, SME lenders (iwoca, Funding Circle) filling the gap the high-street banks left, and insurtech. The notable absences are the schema-gap banks and the overseas-owned payment giants (Stripe, Klarna, Worldpay) whose UK filings don't disclose a comparable figure — all named below.
Top 25 fintech companies in the UK by filed turnover
Latest accounts filed as of June 2026 · refreshed monthly
| # | Firm | Turnover | YoY | Staff | Accounts |
|---|---|---|---|---|---|
| 01 | Revolut Global fintech and banking app Revolut Ltd, the UK operating entity of the global super-app; the group holding company files separately. | £3.31B | +35% | 5,310 | FY to Dec 2025 |
| 02 | PayPal UK payments UK online payments processor | £1.42B | — | — | FY to Dec 2024 |
| 03 | Monzo App-based challenger bank Turnover is total operating income (net interest + fees) — the comparable measure for a bank. | £1.24B | +48% | 3,866 | FY to Mar 2025 |
| 04 | Wise payments & FX International money transfer provider Wise Payments Limited — figure is net revenue (its take rate), not money moved. | £1.23B | +7% | 4,095 | FY to Mar 2025 |
| 05 | Starling Digital retail and business bank Starling Bank Limited; operating income. | £788M | +5% | 3,939 | FY to Mar 2025 |
| 06 | OakNorth Digital commercial and retail bank OakNorth Bank plc — profitable SME lender; operating income. | £568M | -0% | 266 | FY to Dec 2025 |
| 07 | Allica Commercial bank for SMEs Allica Bank — SME-focused; operating income. | £371M | +27% | 799 | FY to Dec 2025 |
| 08 | Marshmallow insurtech Digital insurance provider Marshmallow Technology — digital motor insurer. | £289M | +57% | 441 | FY to Dec 2024 |
| 09 | Trading 212 trading platform Fintech brokerage and trading platform | £278M | +72% | 122 | FY to Dec 2025 |
| 10 | CMC Markets UK trading platform Online trading and investment platform CMC Markets UK plc. | £277M | -7% | 556 | FY to Mar 2025 |
| 11 | iwoca SME lending Small business fintech lender | £234M | +64% | 432 | FY to Dec 2024 |
| 12 | Checkout.com payments Digital payment processing provider Checkout Ltd — net revenue. | £222M | +40% | — | FY to Dec 2024 |
| 13 | Funding Circle SME lending Institutional SME lending platform Funding Circle Ltd; the listed holding company files separately. | £203M | +31% | 677 | FY to Dec 2025 |
| 14 | SumUp payments Financial technology and payments provider SumUp Payments — card acceptance for small merchants. | £182M | +12% | 62 | FY to Dec 2024 |
| 15 | Tide SME platform Business banking platform operator SME banking and admin platform (an e-money platform, not a bank). | £177M | +56% | 956 | FY to Dec 2024 |
| 16 | GoCardless payments Direct debit payment processor Bank-to-bank and direct-debit payments. | £155M | +18% | 626 | FY to Jun 2025 |
| 17 | eToro UK trading platform UK subsidiary of electronic trading platform eToro (UK) Limited. | £109M | +38% | 59 | FY to Dec 2024 |
| 18 | Moneybox wealthtech Retail savings and investment app Digital Moneybox — saving and investing app. | £96M | +24% | 410 | FY to May 2025 |
| 19 | Tandem Digital challenger bank Tandem Bank — green lending; operating income. | £80M | +4% | 500 | FY to Dec 2024 |
| 20 | Liberis SME finance Merchant cash advance provider Embedded small-business finance. | £60M | +32% | 198 | FY to Dec 2024 |
| 21 | Thought Machine banking infrastructure Cloud banking software developer Core-banking software platform. | £48M | -0% | 523 | FY to Dec 2024 |
| 22 | PensionBee wealthtech Online personal pension provider Online pension consolidation. | £43M | +28% | 188 | FY to Dec 2025 |
| 23 | Freetrade wealthtech Mobile retail trading platform Commission-free share-dealing app. | £31M | +10% | 98 | FY to Dec 2025 |
| 24 | Plum wealthtech Automated savings and investment app Plum Fintech — automated saving and investing. | £19M | +50% | 204 | FY to Mar 2025 |
| 25 | Modulr payments infrastructure Embedded payments platform provider Modulr FS — embedded payments and accounts. | £15M | +5% | 7 | FY to Dec 2024 |
The firms we can't rank
Fintech's missing names are licensed banks with an IFRS schema gap and overseas-owned payment giants that don't file comparable UK revenue.
- ClearBank, Zopa Bank, Atom Bank — licensed banks filing under IFRS — their operating income isn’t isolated in a comparable turnover line in our extraction (the same schema gap that affects established banks)
- Worldpay — the UK payments-processing giant files audit-exempt with no disclosed turnover; its revenue sits inside the FIS/GTCR global group
- Capital on Tap — its UK card business files via entities without a clean disclosed-turnover group filing
- Banking Circle — Luxembourg-headquartered; no UK turnover filing
- Stripe, Adyen, Klarna (UK) — UK arms of overseas payment groups that file branch registrations or service-fee entities, not comparable UK revenue
How this list is built
Source. The latest annual accounts each firm filed at Companies House. Where a firm files consolidated group accounts, the group figure is used; the entity ranked is named under each firm. Where a firm filed a transition period longer or shorter than twelve months (flagged in the Accounts column), the table shows the filed figure but the firm is ranked on its annualised equivalent.
Who counts as a fintech. Technology-led financial companies — challenger banks, payments, SME and consumer lending, wealthtech, insurtech, trading platforms and banking infrastructure — assembled from a curated registry because fintech has no SIC code of its own. Tagged by sub-sector.
How turnover is read. Challenger banks are ranked on total operating income (net interest + fees); payment companies on net revenue, not transaction volume. We rank each fintech's main UK operating entity. Licensed banks whose IFRS accounts don't isolate a comparable operating-income line (ClearBank, Zopa, Atom), and overseas-owned payment groups that file UK branch/service entities (Stripe, Klarna, Worldpay), are named in the firms we can't rank rather than estimated.
Cadence. Rebuilt monthly as new accounts land. Spot a fintech we've missed or misread? Tell us — the methodology only works if it's challenged.
Quick answers
- What is the biggest fintech in the UK?
- Revolut — its UK entity filed £3.31B, comfortably ahead of PayPal's UK arm and Monzo. After years of losses, the leading UK fintechs are now large and, increasingly, profitable.
- Is a neobank's turnover comparable to a payment company's?
- Carefully. A neobank's figure is total operating income — net interest plus fees, the standard bank measure. A payment company's is net revenue (its take rate), not the money it moves: Wise's filed revenue is a fraction of the hundreds of billions it transfers. We tag every row so you read like with like, and rank challenger banks on operating income, not balance sheet.
- Why isn't Stripe, Klarna or Worldpay here?
- They file in ways that don't yield a comparable UK revenue figure: Stripe and Klarna's UK arms are branch/service entities of overseas groups, and Worldpay files audit-exempt inside the global FIS group. Several licensed challenger banks (ClearBank, Zopa, Atom) file IFRS accounts whose operating income our extraction can't isolate — all are named in the firms we can't rank.
- How was this list built without a fintech SIC code?
- There isn't one — fintechs file under banking, payments, software and lending codes. So this list is assembled from a curated registry of UK fintech companies and ranked on their filed accounts, rather than swept from a single industry classification.