Patent Box or R&D Tax Relief?
They are not alternatives — most patent-led UK companies claim both.
Key takeaway
They are not alternatives — most patent-led UK companies claim both. This guide weighs Patent Box, R&D Tax Relief, R&D Expenditure Credit (RDEC) against your stage, funding type and timeline using verified FundingAtlas data, and explains when each is the right call.
The question
They are not alternatives — most patent-led UK companies claim both.
Key considerations
The factors that should shape your decision before you commit operator hours to an application.
| Funding stage | established, any |
|---|---|
| Funding type | tax_incentive |
| Funding amount | Patent Box: 10% effective Corp Tax rate • R&D Tax Relief: Up to ~27p per £1 of R&D spend • R&D Expenditure Credit (RDEC): 20% above-the-line credit |
| Eligibility | UK company subject to corporation tax; owns or exclusively licences qualifying patents; meets the Nexus / development condition; formally elects into the regime within 2 years of the end of the accounting period in which the profit arises. |
| Timeline | Election within 2 years of period-end. First-year computations can take 2–6 months given the Nexus tracking and streaming requirements. HMRC enquiry windows apply as for any CT600 claim. |
| Region | Some programmes are England-only, others run across the devolved nations or are restricted to combined-authority footprints. Check each official source. |
Recommended route
R&D Tax Relief rewards qualifying R&D expenditure. Patent Box reduces corporation tax on profits attributable to qualifying patents. They reward different stages of the same value chain. Treat them as complementary tools, not a choice.
Alternative routes
Where the primary recommendation is not the right fit, these are the programmes most commonly considered alongside it.
- R&D Tax Relief
tax_incentive · Up to ~27p per £1 of R&D spend
- R&D Expenditure Credit (RDEC)
tax_incentive · 20% above-the-line credit
Common mistakes
- Starting with the largest scheme rather than the highest-fit scheme.
- Treating funding as a one-off project rather than a 24-month strategy.
- Underestimating the documentation effort: prior trading, prior R&D, finance pack.
- Missing the interaction between grant income and downstream R&D tax relief.
- Engaging a contingent-fee broker before checking whether the scheme is broker-eligible.
- Self-selecting out of a programme based on an optimistic read of eligibility.
Decision checklist
- Confirm your business stage, region and headcount against scheme thresholds.
- Map the next 24 months of funding need before applying to any one programme.
- Identify the official source for each programme on your shortlist.
- Quantify match-funding and staged-drawdown impact on cashflow.
- Check subsidy-control / de minimis ceilings across stacked awards.
- Model the interaction with R&D tax relief on subsidised costs.
- Decide whether the assessment timeline fits your delivery plan.
- Schedule the application in the calendar before committing operator hours.
Frequently asked questions
- What is this decision guide about?
- They are not alternatives — most patent-led UK companies claim both.
- Which funding stage does this guide cover?
- Programmes referenced here target: established, any.
- What types of funding are compared?
- This guide considers: tax_incentive.
- How much funding could I access?
- Patent Box: 10% effective Corp Tax rate. R&D Tax Relief: Up to ~27p per £1 of R&D spend. R&D Expenditure Credit (RDEC): 20% above-the-line credit.
- Who is eligible for the recommended routes?
- UK company subject to corporation tax; owns or exclusively licences qualifying patents; meets the Nexus / development condition; formally elects into the regime within 2 years of the end of the accounting period in which the profit arises.
- How long will it take to receive funding?
- Election within 2 years of period-end. First-year computations can take 2–6 months given the Nexus tracking and streaming requirements. HMRC enquiry windows apply as for any CT600 claim.
- Can I apply to more than one of these programmes?
- Some combinations are permitted, others are restricted by subsidy-control rules or scheme-specific exclusivity clauses. Refer to the latest programme guidance before stacking applications.
- Will receiving a grant affect my R&D tax relief claim?
- It can. Grant-subsidised R&D expenditure is often relievable only at a reduced rate, and the interaction depends on which scheme funded which costs. FundingAtlas could not verify the interaction for every combination; confirm with a qualified adviser.
- What if my situation does not match any of the recommended routes?
- Use the Funding Finder to build a personalised shortlist, or request a Funding Strategy Review for a reviewer-led assessment.
- Where do I find the official source for each programme?
- Patent Box: https://www.gov.uk/guidance/corporation-tax-the-patent-box — R&D Tax Relief: https://www.gov.uk/guidance/corporation-tax-research-and-development-rd-relief — R&D Expenditure Credit (RDEC): https://www.gov.uk/guidance/corporation-tax-research-and-development-rd-relief
Next steps
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