A Guide to Enhanced R&D Intensive Support (ERIS) in the UK
Discover if your loss-making, research-intensive UK startup qualifies for Enhanced R&D Intensive Support (ERIS) to claim a cash tax credit of up to 27% on qualifying spend.
Enhanced R&D Intensive Support (ERIS) is a specialised United Kingdom tax relief scheme designed to reward loss-making, research-intensive small and medium-sized enterprises. If your UK startup qualifies, you can secure a cash payment worth up to approximately 27% of your overall qualifying expenditure. Eligible businesses can claim this support to sustain critical cash flow during early-stage development cycles.
Key Takeaways: Do I qualify for ERIS?
To determine quickly if your business qualifies for this enhanced cash credit, review these basic eligibility rules:
- Your company must meet the statutory definition of a small or medium-sized enterprise.
- The business must be loss-making for Corporation Tax purposes before R&D reliefs are applied.
- Your qualifying R&D expenditure must equal at least 30% of your total business expenditure.
- Successful claims yield a highly competitive 14.5% payable cash tax credit rate.
What is Enhanced R&D Intensive Support (ERIS)?
Enhanced R&D Intensive Support is a targeted corporate tax relief mechanism within the UK tax system that provides enhanced financial incentives to loss-making, research-driven small and medium-sized enterprises.
Unlike the standard merged R&D scheme, which offers lower rates of return for corporate R&D spend, ERIS guarantees a return of 27p for every £1 spent on qualifying development. This scheme exists alongside the standard regime to offer a financial lifeline specifically to businesses that invest heavily in original intellectual property while still operating at a loss.
Do I qualify for Enhanced R&D Intensive Support?
To qualify for Enhanced R&D Intensive Support, your business must satisfy four distinct statutory tests outlined within parts of the Corporation Tax Act (CTA) 2009.
- SME Status: Your company must employ fewer than 500 staff, with either an annual turnover below €100 million or a balance sheet total under €86 million.
- Loss-making Status: The business must show a clear trading loss for Corporation Tax purposes before the R&D calculation is factored in.
- R&D Intensity: Your qualifying R&D activities must constitute a set proportion of your overall expenditure during the accounting period.
- Eligible Entity: The company must not be an excluded category listed under section 1142 of CTA 2009, such as certain insurance companies.
How do you calculate the ERIS 30% intensity ratio?
The statutory intensity ratio determines eligibility by dividing your total qualifying R&D expenditure by your total overall business expenditure.
For accounting periods beginning on or after 1 April 2024, this threshold is set at 30%, reducing from the previous 40% barrier. Under the Corporation Tax Act 2009, you must aggregate the entire expenditure of all worldwide connected companies when carrying out this calculation.
How does the ERIS grace period work?
The grace period is a protective mechanism that allows companies to retain their ERIS status during transitional business years.
If your startup met the 30% intensity threshold in its immediately preceding 12-month accounting period, you can claim the enhanced rate even if your R&D dip falls below 30% in the current year. This protects R&D-heavy entities experiencing brief interruptions to their research and development activities.
How much cash credit can my startup claim?
Your loss-making business can access an 186% enhanced deduction alongside a 14.5% payable credit.
To illustrate the exact scale of benefits provided under this relief, consider the following calculation breakdown for a high-expenditure startup:
| Tax Element | Details and Rates | Worked Example |
|---|---|---|
| Additional Deduction Rate | 86% on top of the base 100% deduction (186% total) | Not applicable on cash credit alone |
| Payable Tax Credit Rate | 14.5% of the surrenderable loss | Applied to the enhanced spend pool |
| Cash Return for £500,000 spend | Approximately 27% cash return | An enhanced value of £930,000 yields a £134,850 credit |
How does the PAYE/NIC cap restrict the claim?
The PAYE/NIC cap restricts the total payable tax credit cash payable to your startup to prevent artificial tax structures.
This cap is officially set at £20,000 plus 300% of your relevant PAYE and National Insurance Contribution liabilities. Startups that rely heavily on offshore contractors or have very low UK payroll numbers are particularly vulnerable to this restriction. In order to avoid unexpected funding shortfalls, companies must model these payroll figures early in the operational year.
What risks could disqualify my ERIS tax claim?
Several compliance and financial issues can disqualify your startup from receiving this cash tax credit.
First, receiving state aid or grant funding can directly reduce your base qualifying R&D expenditure. This reduction can pull your overall R&D intensity ratio underneath the mandatory 30% threshold.
Second, you must submit your claim notification to His Majesty's Revenue and Customs (HMRC) within six months of the end of the accounting period. Late submissions will result in an automatic rejection, making strict deadline management critical for your internal finance team.
What is the difference between ERIS and the standard merged R&D scheme?
ERIS offers a much higher cash recovery rate of approximately 27% specifically for loss-making, research-intensive SMEs, whereas the standard merged R&D scheme caters to profitable organisations and returns a lower overall cash benefit.
Can profitable startups claim Enhanced R&D Intensive Support?
No. Under the terms of the Corporation Tax Act 2009, a startup must be experiencing a trading loss for Corporate Tax purposes before applying R&D reliefs to claim ERIS. Profitable entities must use the standard merged scheme.
How does receiving a grant affect my ERIS eligibility?
Grants can lower your overall qualifying R&D expenditure pool. This reduction can inadvertently push your intensity calculation below the mandatory 30% mark, disqualifying your company from the enhanced rates.
What happens if our R&D spending drops below 30% this year?
If you met the 30% threshold in the immediately preceding 12-month accounting period, the statutory grace period allows you to retain your ERIS status and claim the enhanced credit rate for this year too.