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R & D

Support for R&D intensive, loss-making SMEs.

Enhanced R&D Intensive Support (ERIS) offers a higher payable tax credit to support SMEs that are loss-making and heavily invested in innovation. The scheme continues under the SME framework, despite the introduction of a merged R&D scheme for all other businesses.

ERIS was introduced to address the funding challenges many innovative SMEs face, especially in early-stage or pre-revenue phases. By increasing access to cash via a higher credit rate, ERIS aims to protect and reward businesses in sectors like life sciences and deep tech, who may otherwise struggle under reduced SME R&D rates or the merged R&D scheme.

Who qualifies for ERIS?

To be eligible for ERIS, your business must meet all of the following three criteria:

  • Be an SME
  • Be loss-making in the relevant accounting period
  • Meet the R&D intensity threshold

The R&D intensity ratio calculation:

R&D intensity = relevant R&D expenditure / total relevant expenditure.

Your relevant R&D expenditure includes qualifying R&D spend in your claim plus that of any connected companies, and your total relevant expenditure includes trading costs (from the P&L), qualifying pre-trading costs, and adjustments under section 1308 CTA 2009, minus spend with connected companies. This must also include connected parties’ figures.

Thresholds:

  • 40% for expenditure incurred on or after 1 April 2023
  • 30% for accounting periods beginning on or after 1 April 2024

A one-year grace period applies if a company falls below the threshold, offering consistency in financial planning.

The Enhanced R&D Intensive Support (ERIS) scheme officially came into effect for accounting periods beginning on or after 1 April 2024.

However, eligible companies could claim the associated, higher tax credit rate for expenditure incurred on or after 1 April 2023, under a retrospective provision of the old SME scheme. 

The definition of loss-making varies, depending on when the expenditure was incurred:

  • For expenditure incurred on or after 1 April 2023: a company is eligible if it has a surrenderable tax loss after applying the R&D enhancement. During this period the 40% intensity threshold applies to loss-making SMEs.
  • For accounting periods beginning on or after 1 April 2024: eligibility depends on having a tax loss before any R&D enhancement. During this period the 30% intensity threshold applies to loss-making SMEs.

R&D intensive, loss-making SMEs are eligible for a higher payable credit rate of 14.5% if they meet the definition for R&D intensity.

These calculations assumes that the company has £200,000 of qualifying R&D expenditure and a pre R&D tax loss of £500,000.

Total enhanced R&D expenditure £372,000 (£200,000 x 86% = £172,000 plus the original £200,000)

Total tax adjusted loss available to surrender £672,000 (£500,000 loss plus enhanced expenditure of £172,000)

R&D claim is equal to 14.5% of the lower of either a) total enhanced R&D expenditure of £372,000 or b) Total tax adjusted losses available to surrender £672,000. Therefore £372,000 x 14.5% = £53,940

Need support with your R&D claim?

Our specialist innovations team is here to help. We’ll assess your eligibility, guide you through the calculation, and ensure your claim is robust and timely.

Get in touch
Page reviewed May 2026.