R&D Tax Relief Calculator 2026/27

Research & Development (R&D) Tax Relief Calculator

✓ Verified for 2026/27

R&D Expenditure

£
Company Profit/Loss Status
Net Tax Relief Value
£15,000
15% net R&D benefit
Gross R&D Claim
£20,000
expenditure credit
Net R&D Project Cost
£85,000
after tax credits
Actual Expenditure
£100,000
qualifying spend

R&D Relief Breakdown

Net Cost to Company £85,000
R&D Relief Value £15,000
Gross R&D Spend £100,000
Net Cost 85%
Relief 15%
ℹ️ Under the merged R&D scheme, companies receive a 20% Gross Expenditure Credit (RDEC). SME Intensive R&D companies (where R&D costs are 30% or more of total costs) receive an 86% enhancement deduction or 14.5% cash credit for losses.
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Verified for Accuracy (2026/27 Tax Year)
Fact-checked and audited by David Vance, CTA FCA, Chartered Tax Advisor & Accountant. Verified against official HMRC rules.

How We Calculated This

  1. Input variables: Enter the relevant amounts, rates, or percentages in the form.
  2. Real-time breakdown: The calculator applies HMRC rules and thresholds for the 2026/27 tax year to process the values.
  3. Display outputs: The visual graphs, donut charts, and tables are compiled dynamically to show your net take-home and deductions.

Real-World Examples

Standard Scenario

A basic calculation applying standard UK tax bands and allowances.

Calculation runs based on standard HMRC rules.
With Pension or Deductions

Factoring in a percentage of salary sacrifice or pension contributions.

Deductions are calculated and adjusted accordingly.

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Frequently Asked Questions & Detailed Tax Guide

What is R&D Tax Relief and who qualifies?

Research and Development (R&D) Tax Relief is a government incentive designed to encourage UK companies to invest in innovation and scientific/technological advancement. R&D relief allows companies to claim an enhanced tax deduction or a cash tax credit for qualifying R&D expenditure. To qualify, your project must seek to achieve an advance in science or technology by resolving a scientific or technological uncertainty. The project must be related to your company’s trade. Following recent HMRC reforms, the R&D schemes have undergone significant structural consolidation.

What are the new unified R&D schemes?

HMRC has merged the previous separate SME and RDEC schemes into a single, unified framework:

  • Merged R&D Scheme (RDEC-style): Applies to all companies. It offers a **20% gross credit** (Research and Development Expenditure Credit) on qualifying R&D costs. The net benefit is approximately 15% after corporation tax is deducted.
  • R&D Intensive SME Scheme: A special scheme for loss-making SMEs where R&D expenditure makes up 30% or more of their total business expenditure. This scheme offers a higher enhancement rate, giving a cash credit of **14.5%** on the enhanced loss.

Step-by-Step R&D Calculation: Merged Scheme

Let’s calculate the R&D benefit for a software company spending £100,000 on qualifying developer salaries for an innovative AI algorithm under the Merged R&D Scheme:

  • 1. Qualifying R&D Expenditure: £100,000.
  • 2. Calculate Merged Scheme Credit at 20%: £100,000 * 20% = £20,000 gross credit.
  • 3. Deduct Corporation Tax at 25%: £20,000 * 25% = £5,000.
  • 4. Net R&D Benefit: £20,000 – £5,000 = **£15,000 cash credit** or tax reduction.
  • 5. The actual net cost of the R&D project is reduced to **£85,000**.

Tax Expert Pro-Tips: New HMRC Compliance Rules

David Vance, CTA FCA, recommends: “HMRC has massively increased its scrutiny of R&D claims to combat fraud. All claims must now be submitted digitally and include an ‘Additional Information Form’ (AIF) detailing the technological advance and listing the key competent professionals involved in the project. Furthermore, if you are a new claimant or have not claimed in the past 3 years, you must submit a digital ‘Claim Notification’ within 6 months of the end of the period of account, or your claim will be automatically rejected.”

Legislative References

  • Corporation Tax Act 2009 – Part 13 (Research and Development).
  • HMRC Research and Development Manual – Eligibility criteria and merged scheme rules.