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Tax and Compliance

The R&D Intensive SME Test: How Agencies Get Up To 27p Per Pound (ERIS)

9 min read · ·

Photo: Artem Podrez / Pexels

JW

Editorial Lead · Published 16 May 2026 · Updated 17 May 2026

Editorial content from the Agency Founder Finance team. For decisions specific to your agency, book a call.

Key takeaways

  • For accounting periods beginning on or after 1 April 2024, the old intensive SME 27% payable credit and 186% enhanced deduction are replaced by the merged scheme and ERIS (Enhanced R&D Intensive Support).
  • Under ERIS (from 1 April 2024), the intensity threshold is 30% of total expenditure, giving an 86% enhanced deduction and a 14.5% payable credit for loss-making R&D-intensive SMEs.
  • The 27% payable credit and 186% enhanced deduction described in this article applied only to the transitional period (accounting periods beginning 1 April 2023 to 31 March 2024); do not use these rates for post-1-April-2024 periods.
  • Total costs include all revenue expenditure in the profit and loss account plus capitalised R&D costs and intangible assets.
  • To qualify for ERIS, you must be an SME (fewer than 500 employees, turnover under €100m or gross assets under €86m) and loss-making on a trading basis with R&D spend at least 30% of total costs.

If your agency is spending heavily on developing new software, tools, or processes, the standard R&D tax credit scheme already gives you a decent return. But if your R&D spend is high relative to your total costs, you may qualify for an enhanced route: the R&D intensive support mechanism.

Important: the rates described in this article apply to accounting periods starting between 1 April 2023 and 31 March 2024 (the transitional intensive SME period). For accounting periods beginning on or after 1 April 2024, the merged scheme fully replaces the old SME regime, and the intensive route is now called Enhanced R&D Intensive Support (ERIS). ERIS gives a 14.5% payable credit and an 86% enhanced deduction for qualifying loss-making SMEs whose R&D spend is at least 30% of total costs. Do not use the 27% rate or the 186% deduction for post-1-April-2024 periods.

For the transitional period (accounting periods beginning 1 April 2023 to 31 March 2024), HMRC offered a higher payable credit rate of 27% for loss-making companies meeting the intensive SME test. The 186% enhanced deduction applied to profitable intensive SMEs. The 30% intensity threshold applies in both the transitional period and ERIS.

This article explains the r&d intensive sme rate agency test in plain English: what counts, how to calculate it, and whether your agency qualifies.

What Is the R&D Intensive SME Test?

The intensive SME test is a simple threshold. If your qualifying R&D expenditure is 30% or more of your total costs for the accounting period, you are an "R&D intensive" company. This unlocks the higher payable credit rate if you are loss-making.

Under the merged scheme (accounting periods from 1 April 2024), everyone gets a 20% expenditure credit, which is taxable, so it is worth roughly 15p to 16.2p per pound of qualifying spend. ERIS works differently for loss-making R&D-intensive SMEs: you get an 86% enhanced deduction on qualifying spend, then surrender the enhanced loss (capped at 186% of qualifying spend) for a 14.5% payable cash credit. At the cap that is 26.97p per pound. For an agency spending £100,000 on qualifying R&D, that is up to £26,970 in cash versus roughly £15,000 to £16,200 net under the merged scheme.

HMRC introduced this change in the 2023 Spring Budget, effective for accounting periods beginning on or after 1 April 2023. The rationale was to reward genuinely innovation-intensive businesses, the ones where R&D is not a side project but a core activity.

Who Qualifies for the Intensive SME Rate?

Three conditions must be met:

  • You are an SME for R&D purposes (fewer than 500 employees and either turnover under €100m or a gross assets under €86m).
  • Your qualifying R&D expenditure is at least 30% of your total costs for the period.
  • You are loss-making on a trading basis (your allowable costs exceed your income).

If all three apply (SME, loss-making, 30%+ intensity), you claim ERIS: the 86% enhanced deduction, then surrender the enhanced loss at 14.5%, up to the 186% cap. If you are profitable, intensity does not change your relief: you claim the merged scheme 20% expenditure credit like every other company. Intensity is still worth tracking, because a loss-making year would unlock ERIS.

What Counts as "Total Costs"?

This is where most agency founders get confused. HMRC defines total costs as the sum of all revenue expenditure included in the profit and loss account, plus any capitalised R&D costs, plus any R&D expenditure that has been capitalised as an intangible asset. In plain terms, it is everything you spend in the period, salaries, rent, software, freelancers, subcontractors, marketing, everything, plus any R&D you have capitalised on your balance sheet.

For a typical agency, total costs will be dominated by staff costs, premises, and third-party contractor payments. The intensive SME test requires that at least 30% of that total is qualifying R&D spend.

Here is a worked example on the current ERIS rules. A 15-person digital agency in Manchester Northern Quarter has total costs of £1.2m in its accounting period. Its qualifying R&D spend is £400,000. That is 33.3% of total costs, so it qualifies as R&D intensive. Say it makes a £200,000 trading loss before R&D relief. The 86% enhanced deduction adds £344,000, taking the enhanced loss to £544,000, comfortably inside the £744,000 cap (186% of £400,000). Surrendering £544,000 at 14.5% gives a cash credit of £78,880. If its losses had covered the full cap, the maximum credit would be £107,880, which is 26.97% of the qualifying spend.

What Qualifies as R&D for a Creative or Digital Agency?

This is the critical question. Many agency founders assume R&D tax credits are only for labs and pharmaceutical companies. That is wrong. HMRC's guidelines specifically include software development, process innovation, and technical problem-solving.

For a creative or digital agency, qualifying R&D typically includes:

  • Developing new software platforms or tools for clients
  • Building proprietary AI or machine learning models
  • Creating new algorithms for data processing, targeting, or automation
  • Designing and testing new technical architectures
  • Resolving technical uncertainties in software or hardware integration
  • Developing new methodologies for data analysis or visualisation

The key test is whether there was a technical uncertainty that could not be resolved by a competent professional in the field. If your team had to experiment, test, and iterate to find a solution, that is R&D. If they simply applied existing techniques in a standard way, it is not.

For example, a web design agency building a standard WordPress site for a client is not doing R&D. But that same agency building a custom headless CMS with real-time data synchronisation across multiple platforms, where no off-the-shelf solution existed, almost certainly is. The difference is the technical challenge.

How to Calculate the 30% Threshold

The calculation is straightforward in theory but requires careful categorisation in practice.

Step one: identify all qualifying R&D expenditure for the period. This includes direct staff costs (salaries, employer NI, pension contributions) for staff directly engaged in R&D, plus qualifying indirect costs (a percentage of overheads, typically 65% of staff costs under the HMRC simplified method). It also includes externally provided workers and subcontractor costs, subject to restrictions.

Step two: identify your total costs for the period. This is all revenue expenditure from your P&L, plus any capitalised R&D costs. Do not include capital expenditure on assets not related to R&D (like office furniture) unless they are part of the R&D project.

Step three: divide qualifying R&D spend by total costs. If the result is 30% or higher, you are intensive.

Step four: if you are loss-making and intensive, claim ERIS (surrender the enhanced loss at 14.5%). If profitable, claim the merged scheme 20% expenditure credit.

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A Real-World Example

Take a 20-person advertising agency in Soho with total costs of £2.5m. It has a team of five developers working on a new programmatic advertising platform. Their qualifying R&D costs are:

  • Staff costs for the five developers: £300,000 (salaries, NI, pensions)
  • Qualifying indirect costs (65% of staff costs): £195,000
  • Subcontractor costs for specialist AI work: £100,000
  • Total qualifying R&D spend: £595,000

Total costs are £2.5m. R&D spend is £595,000, which is 23.8% of total costs. This agency does not meet the 30% threshold and therefore does not qualify as R&D intensive. It can still claim the merged scheme 20% expenditure credit, but not ERIS.

If the agency had a smaller cost base (say £1.8m total costs) with the same R&D spend, the percentage would be 33.1%, and it would qualify as intensive. The difference is not in what they do, but in the relative size of their R&D investment.

Common Mistakes Agencies Make

The most common error is including non-qualifying costs in the R&D spend calculation. Marketing costs, standard client work, and routine maintenance are not R&D. Only work that resolves technical uncertainty counts.

Another mistake is failing to capitalise R&D costs where appropriate. If your agency builds a proprietary software tool that you intend to use for multiple clients over several years, those costs should be capitalised as an intangible asset. That capitalised amount then feeds into the total costs figure for the intensive test. Getting this wrong can push you above or below the 30% threshold.

A third mistake is not tracking time properly. HMRC expects to see timesheets or equivalent records showing which staff spent what proportion of their time on R&D activities. Without this, your claim is vulnerable to challenge.

What If Your Agency Is Profitable?

ERIS only benefits loss-making companies. If your agency is profitable, you claim the merged scheme 20% expenditure credit, which reduces your corporation tax bill.

But being intensive still matters for profitable agencies. If your profitability fluctuates, you might be loss-making in some years and profitable in others. Knowing that you meet the intensive test in loss-making years means you can claim the higher credit rate when you need it most.

Also, if your agency is close to the 30% threshold, you might consider timing your R&D spend to ensure you meet the test in a loss-making year. That is a legitimate tax planning strategy, as long as the underlying activity is genuine R&D.

How to Claim the Intensive SME Rate

Claims are made through your corporation tax return (CT600). You must include a full R&D report detailing the qualifying projects, the technical uncertainties, and the costs. For intensive claims, you also need to demonstrate that the 30% threshold is met.

HMRC has been increasing its scrutiny of R&D claims across the board. Since August 2023, all claims must be made digitally and include additional information forms. For intensive claims, you must also confirm that you meet the 30% test and provide supporting calculations.

If you are claiming for the first time, expect HMRC to ask questions. They may request timesheets, project documentation, and evidence of technical uncertainty. This is normal. Do not let it put you off.

Should You Restructure Your Agency to Qualify?

Some agency founders ask whether they should separate their R&D activities into a separate company to improve the percentage. That is a complex question with no universal answer.

If your R&D is a small part of a larger agency, separating it into a standalone company might push that new company over the 30% threshold. But you also lose the ability to offset losses against profits elsewhere in the group. You need to model both scenarios.

Working exclusively with agency founders, we advise clients to make structural decisions based on commercial logic, not tax optimisation alone. If separating R&D makes commercial sense, the tax benefits are a bonus. If you are only doing it for the tax credit, the costs and complexity often outweigh the benefit.

What Changes Are Coming?

From 1 April 2024 the old intensive SME regime was replaced by ERIS under the merged scheme. The intensity threshold is 30% of total expenditure, the same threshold as the transitional period, so agencies that qualified under the transitional rules should re-assess using the ERIS framework. The key difference is the relief rate: ERIS provides a 14.5% payable credit and an 86% enhanced deduction, replacing the 27% payable credit and 186% deduction of the transitional intensive SME scheme.

ERIS is a permanent feature of the merged R&D system, not a temporary measure. Loss-making agencies that are genuinely R&D-intensive (30% threshold) should assess ERIS eligibility at year-end.

If your agency is developing new software, tools, or processes, and your R&D spend is a significant part of your total costs, the ERIS intensity test is worth understanding. Under ERIS, a loss-making intensive agency with £400,000 of qualifying spend and a £200,000 pre-relief loss receives £78,880 in cash (14.5% of the £544,000 enhanced loss), rising to a maximum of £107,880 where losses cover the full 186% cap. The merged scheme's 20% taxable credit would net roughly £60,000 to £64,800 on the same spend, and as a credit against no taxable profit it is far less useful to a loss-maker.

If your contractor mix has changed or you have taken on new technical staff in the last 12 months, ask your accountant before year-end whether you qualify. The calculation is straightforward, but the documentation needs to be in place before you file your return.

Frequently asked questions

What is the R&D intensive SME rate for agencies from 1 April 2024?
For accounting periods beginning on or after 1 April 2024, the intensive route is Enhanced R&D Intensive Support (ERIS). The intensity threshold is 30% of total expenditure. ERIS gives an 86% enhanced deduction and a 14.5% payable credit for loss-making R&D-intensive SMEs. The 27% payable credit only applied to the transitional period (accounting periods 1 April 2023 to 31 March 2024) and does not apply to post-April 2024 periods.
How do I calculate if my agency is R&D intensive?
Divide your qualifying R&D expenditure by your total costs (all revenue expenditure plus capitalised R&D costs). If the result is 30% or higher, you are intensive. For example, an agency with £400k R&D spend and £1.2m total costs is at 33.3% and qualifies.
Can a profitable agency benefit from the intensive SME route?
Not directly. ERIS (from 1 April 2024) only applies to loss-making companies. Profitable agencies with qualifying R&D claim under the standard merged scheme (20% taxable credit, net benefit approximately 15%). Knowing you meet the 30% intensity threshold is useful for future loss-making years when ERIS would apply.
What counts as qualifying R&D for a digital or creative agency?
Qualifying R&D includes developing new software platforms, building proprietary AI models, creating new algorithms, resolving technical uncertainties in software or hardware integration, and developing new technical methodologies. Standard client work or routine maintenance does not qualify. The key test is whether a technical uncertainty existed that required experimentation.

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