R&D Tax Credit Calculator

Estimate your R&D tax credit using real HMRC rates. ERIS (27%), SME enhanced deduction (21.5%), or RDEC (20%).

Indicative estimate based on GOV.UK/HMRC guidance current at May 2026. Not tax advice or a claim approval. Actual claims require specialist review.

1. Your Business

Company name

Work email

Primary sector

Employees (approx)

Full-time equivalent headcount

Annual turnover (GBP)

Most recent accounting period

2. R&D Activity & Spend

What did you develop, improve, or attempt to solve?

Focus on technical challenges, not commercial benefits. HMRC wants to see science/technology uncertainty.

Total qualifying R&D spend (GBP)

Staff, subcontractors, software, consumables, cloud, EPWs

Of which: staff costs on R&D (GBP)

Salary + NIC + pension for staff doing R&D work

Have you claimed R&D relief before?

3. Eligibility Criteria

Tick all that apply. These mirror HMRC's core eligibility tests.

The company pays UK Corporation Tax (or would if profitable). The project sought an advance in science or technology — not just a commercial improvement or routine engineering. The team faced genuine technical uncertainty that a competent professional in the field could not readily resolve. You can evidence the R&D: experiments, prototypes, failed attempts, technical notes, code commits, test records, or design iterations. Qualifying cost categories are identifiable (staff time, subcontractors, software, consumables, cloud infrastructure, EPWs). The company was loss-making during the relevant accounting period(s).

Your R&D Tax Credit Estimate

Estimated Credit

Based on -- qualifying expenditure at --

Eligibility Score

Not scored

Realistic Range

Conservative to optimistic, depending on cost allocation and evidence quality.

Sector Note

Eligibility Signals & Gaps

Claim Your Credit — No Upfront Cost

Your estimated -- credit is worth pursuing. Our specialist R&D tax partner (Leyton, one of Europe's largest R&D consultancies) can:

Full technical and financial review of your claim
Prepare and submit to HMRC on your behalf
Handle any HMRC enquiry or compliance check
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