R&D intensive SME scheme UK – Changes Explained for 2026

2 September 2026

The R&D intensive SME scheme UK has changed significantly in recent years, and directors need a clear, practical guide to what this means for claims and cash flow. This article explains the merged R&D scheme, the interaction with RDEC for SMEs, and the steps limited companies should take now.

What has changed: an overview of the merged R&D scheme

Since the recent reforms, the government has simplified R&D reliefs by rationalising multiple schemes into a single, more targeted approach. The new approach aims to reduce abusive claims, tighten definitions of qualifying activity, and adjust rates to better reflect the public cost of reliefs.

Key changes you need to know:

A merged R&D scheme replaces multiple overlapping reliefs, producing clearer rules for who claims what and how.
Eligibility and definition tests for qualifying R&D have become more focused on technological advance and uncertainty.
The way payable credits and tax reductions are calculated has been revised, with implications for both loss-making and profitable firms.

These changes affect companies claiming under the R&D intensive SME scheme UK and those that previously used SME-specific rules. For many small businesses, the key questions will be whether they still qualify as an SME for R&D purposes, whether they meet the R&D intensity tests, and whether a claim should be made as an SME-style claim or under the RDEC for SMEs route.

Why the government reformed R&D tax reliefs

The rationale behind the reforms was to balance support for genuine innovation with tighter controls on misuse. HMRC identified a rise in aggressive and ineligible claims that increased public spending without corresponding innovation outcomes. The reforms aim to:

Target reliefs at high-value, risky R&D activity that contributes to the UK economy.
Simplify scheme architecture by merging overlapping reliefs and clarifying eligibility.
Introduce stronger compliance and reporting requirements to increase assurance.

For directors, this means higher expectations for documentation and clearer boundaries around what counts as qualifying expenditure.

Who is affected – defining R&D intensity and SME status

Two concepts are central: SME status and R&D intensity.

SME status

SME status for R&D historically aligned with state aid definitions and company size thresholds. Under the merged scheme, eligibility continues to consider headcount, turnover, and balance sheet totals but with more emphasis on whether the company is genuinely small or medium in scale of operations and R&D activity.

R&D intensity

The term "R&D intensive" is used to describe companies where a substantial share of overall activity and spend is directed towards R&D. The R&D intensive SME scheme UK targets firms whose:

R&D spend represents a high proportion of turnover or total costs, or
R&D activity is a core business objective rather than an ancillary function.

Practically, HMRC is likely to consider a mix of quantitative and qualitative signals when assessing intensity, including:

Percentage of turnover spent on R&D.
Number of staff working on R&D versus total staff.
The centrality of R&D outputs to the business model.

Practical eligibility examples

A small biotech SME with 40% of staff in laboratory roles and R&D spend of 30% of revenue is typically R&D intensive and will usually still qualify under the SME-focused approach.
A software company with occasional R&D projects but limited spend may still claim, but may not meet "intensive" expectations and could face closer scrutiny.

If you are unsure whether your company meets the tests, seek specialist advice before filing a claim.

How the merged R&D scheme works in practice

The merged R&D scheme unifies several prior claim routes and changes how reliefs are calculated. Two key elements are the rebalanced rates and the clearer split between SME-style relief and the Research and Development Expenditure Credit (RDEC) mechanism.

Rates and mechanics

SME-style relief has been adjusted to reflect the merged scheme. This affects both enhanced deduction amounts and the calculation of payable credits for loss-makers.
RDEC for SMEs: where firms do not qualify for the SME-style claim, or where particular types of expenditure are excluded from SME treatment, the RDEC-style mechanism may be used. The RDEC for SMEs is a taxable credit shown in the company accounts.

The combined effect is to streamline treatment while ensuring taxable credits under RDEC are clearly visible in profit and loss statements.

What counts as qualifying expenditure now

Qualifying R&D costs typically include:

Staff costs directly engaged on projects.
Software and consumables used in R&D.
Subcontractor costs, subject to tighter rules on eligibility.
Externally provided workers and certain overheads where directly attributable.

Exclusions or clarified limits include:

Purely routine or cosmetic changes that lack technological uncertainty.
Market research, quality control or routine data collection that does not resolve scientific or technological uncertainty.

HMRC provides detailed guidance on qualifying activity and cost categories. See HMRC guidance for more detail: https://www.gov.uk/guidance/corporation-tax-research-and-development-tax-relief-for-small-and-medium-sized-enterprises

Interaction between the merged R&D scheme and RDEC for SMEs

One of the most discussed topics is the place of RDEC for SMEs. Under the merged approach:

Some companies that would previously have claimed under SME rules will now be channelled into an RDEC-style calculation for certain expenditure types.
RDEC for SMEs remains a taxable credit, so claims must be modelled carefully to understand net cash benefit after corporation tax and payroll interactions.

Directors should model both routes to determine which produces the best net benefit for the company. Considerations include:

Whether the company is loss-making or profitable.
Whether the claim will generate a payable credit or simply reduce taxable profits.
The interaction with other reliefs and state aid constraints.

Practical steps for SMEs and limited company directors

To prepare for claims under the new R&D intensive SME scheme UK, take the following actions:

Review projects and classify qualifying activity

Map current and recent projects against HMRC eligibility tests.
Document technological uncertainties and how your team resolved them.

Improve record keeping and timesheets

Introduce consistent time recording for staff directly engaged on R&D.
Use project codes in your accounting system so costs are easy to extract.

Rework your claim model

Create scenario models for SME-style claims versus RDEC outcomes.
Factor in corporation tax and potential cash receipts for loss-making periods.

Update accounting processes

Ensure your statutory accounts and tax computations reflect RDEC entries clearly when used.
Coordinate with your external accountant so claims are included correctly in the CT600.

Consider specialist support

If R&D is a core activity, a Fractional CFO or R&D tax specialist can optimise claim timing and structure.

Relevant Figures services to help: Statutory Accounts & Tax, Bookkeeping & Xero, and Fractional CFO.

Record keeping, software and accounting systems

Good software and processes make R&D claims far easier and reduce risk. Practical tips:

Use a cloud accounting package and tag R&D costs to projects.
Maintain contemporaneous technical records that describe uncertainties, hypothesis, experiments and results.
Keep payroll details and timesheets for staff working on R&D.

If you use Xero, integrating project tracking and timesheets will simplify extraction of R&D spend for the claim period.

Common pitfalls and how to avoid them

Claiming routine or non-technical activity. Avoid by matching each claimed project to a clear technological uncertainty and solution path.
Poor timesheet records. Remedy with mandatory project time capture for staff on R&D.
Incorrect subcontractor treatment. Review new limits and documentation needs for subcontractor costs.
Not modelling RDEC tax impact. RDEC is taxable and can affect reported profit and cash flow; always model the net position.

Worked examples

Example 1 – R&D intensive SME, profitable

A software SME spends 18% of turnover on R&D. Under the merged scheme the company qualifies as R&D intensive and uses the SME-style route. The enhanced deduction reduces taxable profits, saving corporation tax. Because the company is profitable, the benefit is an immediate reduction in tax liability.

Example 2 – Loss-making SME, payable credit

A hardware SME with high early-stage R&D is loss-making. The merged scheme allows a payable credit under SME rules or the RDEC-style route if certain costs are excluded. The business models both options and chooses the route that produces the greatest immediate cash inflow once tax and payroll interactions are included.

Preparing for an HMRC enquiry

Tighter rules mean HMRC will expect complete documentation. Prepare by:

Creating a clear technical narrative for each claim.
Retaining experiment logs, design notes and testing outcomes.
Keeping financial substantiation for all claimed costs.

If HMRC opens an enquiry, early engagement with your accountant and prompt provision of records reduces risk and timescales.

UK tax and legal accuracy

This article is for informational purposes only and does not constitute professional tax or financial advice. Please speak to a qualified accountant before taking action. Information reflects the tax year 2026/27 and may change; always check the latest HMRC guidance at GOV.UK.

Frequently asked questions

What is the R&D intensive SME scheme UK and who qualifies?

The term refers to the approach targeting SMEs with high R&D activity and spend. Qualification depends on SME size tests and whether R&D is central to business operations. Companies that spend a large proportion of turnover on R&D or have a high headcount working on R&D are likelier to be classed as R&D intensive.

How does the merged R&D scheme differ from the old system?

The merged scheme consolidates several reliefs, clarifies qualifying activity, and changes rates and treatment for payable credits. It also strengthens documentation and compliance requirements to reduce abusive claims.

Will RDEC for SMEs reduce the benefit of claiming R&D tax relief?

RDEC is taxable, so the headline credit will be subject to corporation tax and will appear in accounts differently than SME enhanced deductions. For some companies RDEC may be preferable; for others the SME-style route will be better. You should model both outcomes.

What records should I retain to support a claim?

Keep contemporaneous technical records, timesheets, expense evidence, project summaries and financial reconciliations. Good records make claims faster, safer and more robust against challenge.

When should I speak to an accountant about R&D claims?

Speak to an accountant early in the project lifecycle or at least before filing the CT600 and the claim. Early advice helps structure activities and costs to maximise legitimate benefit and avoid later disputes.

Summary and next steps

The R&D intensive SME scheme UK and the merged R&D scheme represent a shift toward clearer rules and stronger compliance. Directors should review projects, tighten record keeping, and model claim routes including any RDEC for SMEs outcomes. If R&D is important to your growth plans, get specialist help to ensure claims are accurate and optimised.

If you would like help preparing or reviewing an R&D claim, improving bookkeeping for R&D tracking, or modelling the tax impact, speak to Figures and book a discovery call. Our team can assist with Statutory Accounts & Tax, Bookkeeping & Xero and strategic support through our Fractional CFO offering.