Fintech development frequently qualifies for R&D tax relief — but HMRC scrutinises software claims more closely than any other category. Under the merged R&D scheme for 2026/27, qualifying expenditure earns a 20% expenditure credit (worth roughly 15–16% after tax), and loss-making, R&D-intensive companies can claim enhanced support worth up to around 27p per £1 through ERIS. The test isn’t whether your product is new — it’s whether your team resolved scientific or technological uncertainty that a competent professional couldn’t readily solve. Payment infrastructure, fraud detection models and real-time ledger engines often pass that test; integrating third-party APIs and building standard user journeys don’t.
What actually qualifies as R&D in fintech
Qualifying R&D means seeking an advance in science or technology by resolving uncertainty that wasn’t readily deducible by a competent professional. In fintech, the qualifying work usually sits below the product surface.
- Payments and settlement infrastructure — novel approaches to throughput, latency, idempotency or reconciliation at scale
- Fraud and AML detection — model architecture and training approaches where performance at your data scale was genuinely uncertain
- Real-time ledger engines — consistency, ordering and recovery guarantees beyond established patterns
- Cryptography and security engineering — where you’re extending techniques, not applying libraries
- Data engineering — cloud computing and data licence costs are qualifying cost categories where they support the R&D
What generally doesn’t qualify: integrating documented third-party APIs, configuring off-the-shelf platforms, UI/UX work, and building features that are new to you but routine to the field. Commercially innovative ≠ technologically uncertain — the distinction HMRC’s software guidance turns on.
What the merged R&D scheme pays in 2026/27
- Merged scheme (most companies): a 20% above-the-line expenditure credit on qualifying costs. The credit is taxable, so the net benefit is roughly 15–16% depending on your Corporation Tax rate
- ERIS (loss-making, R&D-intensive SMEs): where qualifying R&D spend is at least 30% of total expenditure, an enhanced deduction plus a payable credit worth up to around 27p per £1 of qualifying spend
- Qualifying costs: staff, externally provided workers, subcontractors (under the post-2024 contracting rules — broadly, the party that decides to do the R&D claims it), software, cloud computing, data licences and consumables
- Overseas restriction: subcontractor and EPW costs must generally relate to UK-based activity, with narrow exceptions
Run your numbers through the R&D tax credit calculator.
The two deadlines that catch fintech founders
1. Claim notification — six months
If you’ve never claimed before (or haven’t claimed in the last three years), you must notify HMRC of your intention to claim within six months of the end of the accounting period. Miss it and the claim for that period is lost entirely — no appeal, no late route. For a fast-moving startup that discovers R&D relief at year-end +7 months, this is the trap.
2. The Additional Information Form
Every claim must be accompanied by the AIF, filed before or with the CT600, naming the projects, costs and the technical narrative. Claims without it are removed from returns.
Why fintech claims get enquiries — and how to build one that survives
HMRC treats software as a high-risk claim category, and fintech attracts a second layer of attention because the “advance” is often invisible in the shipped product. The claims that survive enquiry share three features:
- A technical narrative written for HMRC’s framework — baseline technology, the uncertainty, why it wasn’t readily deducible, what was done — not a product pitch
- Competent professional evidence — who made the judgement and why they’re qualified to
- Contemporaneous records — tickets, architecture decision records and experiments beat retrospective reconstruction every time
We build the documentation claim-by-claim, before HMRC asks — see our R&D tax relief service and R&D claim review for claims prepared elsewhere.
Grants and R&D — the rules changed
Under the old SME scheme, grant funding (Innovate UK and others) could push expenditure out of SME relief entirely. Under the merged scheme, the subsidised-expenditure restrictions no longer apply in the same way — grant-funded projects can generally still claim the merged credit. The interaction still needs mapping project-by-project (particularly for ERIS), but a grant is no longer the claim-killer founders remember it being. For the full claim mechanics — quarterly reporting, eligible costs and the accountant’s report — see our Innovate UK grant accounting guide.
If you’re raising through SEIS/EIS as well, note that heavy R&D spend often supports knowledge-intensive company status — see our SEIS and EIS for fintech guide.
R&D tax relief for fintech FAQs
Can fintech startups claim R&D tax relief?
Yes — where development work resolves genuine scientific or technological uncertainty. Payments infrastructure, fraud detection models, real-time ledger engines and applied cryptography frequently qualify under the merged R&D scheme for 2026/27. Routine integration, configuration and UI work don't. HMRC scrutinises software claims closely, so the technical narrative and contemporaneous evidence matter as much as the numbers.
Does integrating payment APIs count as R&D?
Usually not. Implementing a documented third-party API in line with its intended use is routine engineering, however commercially valuable. It can qualify where the integration itself required resolving technological uncertainty — for example, achieving throughput, consistency or latency guarantees the available technology couldn't readily deliver — but that has to be evidenced, not asserted.
What is the R&D claim notification deadline?
Companies that haven't claimed R&D relief in the previous three years must notify HMRC of their intention to claim within six months of the end of the accounting period. Missing the notification window means the claim for that period cannot be made at all.
Do Innovate UK grants stop an R&D tax relief claim?
Not the way they used to. Under the merged scheme, the old subsidised-expenditure restrictions that pushed grant-funded projects out of SME relief no longer apply in the same way, so grant-funded R&D can generally still earn the merged credit. The grant/claim interaction should still be mapped per project, particularly where enhanced intensive support (ERIS) is in play.
How much is the merged R&D scheme worth?
A 20% expenditure credit on qualifying costs. The credit is taxable, so the net benefit is roughly 15–16% depending on your Corporation Tax position. Loss-making companies whose qualifying R&D is at least 30% of total expenditure may instead claim ERIS, worth up to around 27p per £1 of qualifying spend.
Godwin Pinto ACA (ICAI) is the founder of AccTek and a member of ICPA, with 20+ years of experience in accounting and tax for contractors, startups and SMEs. Previously at PwC.
Official guidance: HMRC’s R&D relief rules are at Corporation Tax R&D relief, and the claim notification requirement at tell HMRC you plan to claim. AccTek Ltd is an independent accountancy practice and is not affiliated with HMRC or GOV.UK. This guide is general information based on 2026/27 rules, not advice on your company’s specific position.
A claim worth making is a claim worth defending
Qualifying-activity analysis, cost identification, technical narratives and the Additional Information Form — prepared to enquiry standard from day one.
