Do I qualify for RDEC under the new regime?
Most UK companies now fall under the unified RDEC mechanics — but the rules differ for R&D-intensive SMEs.
Key takeaway
Most UK companies now fall under the unified RDEC mechanics — but the rules differ for R&D-intensive SMEs. This guide weighs R&D Expenditure Credit (RDEC), R&D Intensive SME Scheme (ERIS), 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
Most UK companies now fall under the unified RDEC mechanics — but the rules differ for R&D-intensive SMEs.
Key considerations
The factors that should shape your decision before you commit operator hours to an application.
| Funding stage | any, established |
|---|---|
| Funding type | tax_incentive |
| Funding amount | R&D Expenditure Credit (RDEC): Funding levels vary and should be confirmed through the official scheme guidance. • R&D Intensive SME Scheme (ERIS): Up to ~27% effective cash credit • R&D Expenditure Credit (RDEC): 20% above-the-line credit |
| Eligibility | UK companies carrying out qualifying R&D; rules vary by accounting period. |
| Timeline | Claimed via the Company Tax Return. |
| 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
The merged regime means most companies claim under RDEC-style mechanics. R&D-intensive SMEs may qualify for the enhanced ERIS rate. The competent professional test, qualifying expenditure and notification rules all matter — getting these wrong is the biggest cause of enquiry.
Alternative routes
Where the primary recommendation is not the right fit, these are the programmes most commonly considered alongside it.
- R&D Intensive SME Scheme (ERIS)
tax_incentive · Up to ~27% effective cash credit
- 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?
- Most UK companies now fall under the unified RDEC mechanics — but the rules differ for R&D-intensive SMEs.
- Which funding stage does this guide cover?
- Programmes referenced here target: any, established.
- What types of funding are compared?
- This guide considers: tax_incentive.
- How much funding could I access?
- R&D Expenditure Credit (RDEC): Funding levels vary and should be confirmed through the official scheme guidance.. R&D Intensive SME Scheme (ERIS): Up to ~27% effective cash credit. R&D Expenditure Credit (RDEC): 20% above-the-line credit.
- Who is eligible for the recommended routes?
- UK companies carrying out qualifying R&D; rules vary by accounting period.
- How long will it take to receive funding?
- Claimed via the Company Tax Return.
- 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?
- R&D Expenditure Credit (RDEC): https://www.gov.uk/guidance/corporation-tax-research-and-development-rdec — R&D Expenditure Credit (RDEC): https://www.gov.uk/guidance/corporation-tax-research-and-development-rd-relief
Next steps
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