Enhanced R&D Intensive Support (ERIS)

Enhanced R&D Intensive Support (ERIS) is part of the UK’s reformed R&D tax relief regime. It provides targeted relief for R&D-intensive, loss-making SMEs delivering approximately £500 million of additional support annually.

The aim is to help support smaller, highly innovative firms, particularly pre-profit startups that reinvest a large share of their expenditure in R&D but often face difficulties raising sufficient capital. ERIS maintains the more generous support of the former SME scheme for these companies, while other firms now claim under the merged scheme.

Eligibility

To qualify for ERIS, a company must:

  • Be an SME (fewer than 500 staff, an annual turnover under £100 million or a balance sheet under £86 million).
  • Be loss-making for tax purposes in the claim period (before R&D deductions).
  • Meet the threshold: qualifying R&D expenditure must be at least 30% of total expenditure for the period.
    • (This replaced the earlier 40% threshold; 30% applies to periods starting on or after 1 April 2024.)
  • Include all R&D and total costs across the company and its connected enterprises in the calculation.

Grace period: A company that qualified in the previous year may claim ERIS again even if it narrowly falls below the 30% threshold in the current year.

Companies that don’t meet the ERIS criteria, either because they’re profit-making or fall below the R&D intensity threshold, can still claim under the merged RDEC scheme.

Key Features & Benefits

  • Enhanced deduction: Qualifying R&D costs attract a total 186% deduction (100% standard + 86% uplift).
  • Cash credit: Payable credit rate of up to 14.5% of eligible losses surrendered.

From April 2024

The UK reformed its R&D tax relief system:

  • The old SME and RDEC schemes merged into a single R&D credit system.
  • ERIS remains as a special route for loss-making SMEs meeting the 30% intensity threshold, preserving some of the former SME scheme benefits (186% tax deduction and 14.5% cash credit).
  • The R&D intensity threshold was reduced from 40% to 30%.
  • Overseas R&D restrictions tightened: costs are only eligible if UK activity is not possible.

The new changes simplify the framework while directing additional support to R&D intensive start-ups.

Example

A biotech start-up that hasn’t yet started generating revenue spends £280,000 on qualifying R&D activities. Their total trading expenses for the year are £800,000.

To calculate R&D intensity, you divide the R&D spend by total costs (under GAAP plus capitalised R&D costs): £280,000 ÷ £800,000 = 35% R&D intensity

Now, depending on the accounting period, this percentage is compared against HMRC’s threshold:
• For the year ending 31 December 2024, the threshold is 40%, so the company does not qualify as R&D intensive.
• For the year ending 31 December 2025, the threshold drops to 30%, so the company does qualify.

In Summary

ERIS is a targeted enhancement within the UK’s reformed R&D tax credit system. From April 2024, it ensures that loss-making SMEs investing heavily in R&D continue to benefit from the generous support of the old SME scheme, while other firms move to the merged scheme.

Need clarity on your R&D claim?

If you are unsure or want a second view on your position, we can help you work through it clearly.