Tax reliefs for UK SMEs in 2026. R&D tax credits (merged scheme), Annual Investment Allowance, EIS/SEIS, and Patent Box at 10%.
Bottom Line: In 2026, UK SMEs can leverage several tax reliefs including a merged R&D scheme offering a 20% above-the-line credit, a GBP 1 million Annual Investment Allowance, full expensing for qualifying plant and machinery, and specific incentives like EIS and SEIS to boost growth and innovation.
Short answer: The merged R&D scheme in 2026 provides a 20% above-the-line credit for SMEs.
The UK government has consolidated its R&D tax reliefs into a single scheme, offering a 20% above-the-line credit. This change aims to simplify the process and make it more accessible for SMEs. The credit can be used to offset corporation tax liabilities or, in some cases, be claimed as a cash refund.
For more details, visit the official UK government page: R&D Tax Relief for SMEs.
Short answer: SMEs can claim up to GBP 1 million annually under the AIA for qualifying investments.
The AIA allows businesses to deduct the full value of qualifying plant and machinery from their profits before tax. This allowance is set at GBP 1 million, providing significant tax relief for SMEs making substantial investments in their operations.
Short answer: Full expensing allows SMEs to write off the cost of qualifying plant and machinery investments against their taxable income.
Introduced as a temporary measure, full expensing is now a permanent feature of the UK tax landscape. It enables businesses to immediately deduct the cost of qualifying assets, such as equipment and machinery, from their taxable profits, thus encouraging capital investment.
Short answer: SMEs can raise up to GBP 5 million per year through EIS, offering investors tax reliefs.
The EIS is designed to help smaller, high-risk companies raise finance by offering tax reliefs to investors who purchase new shares. SMEs can raise up to GBP 5 million per year, with investors benefiting from income tax relief of 30% on their investment.
For more information, visit: Enterprise Investment Scheme.
Short answer: SEIS allows SMEs to raise up to GBP 250,000, offering investors tax reliefs.
The SEIS is targeted at start-ups and early-stage companies, allowing them to raise up to GBP 250,000. Investors can claim income tax relief of 50% on the amount invested, making it an attractive option for those looking to support new ventures.
Learn more at: Seed Enterprise Investment Scheme.
Short answer: The Patent Box scheme offers a reduced 10% corporation tax rate on profits from patented inventions.
The Patent Box allows companies to apply a lower rate of corporation tax to profits earned from patented inventions. This scheme is designed to encourage companies to retain and commercialize patents in the UK.
For further details, visit: Patent Box.
| Tax Relief | Maximum Benefit | Eligibility |
|---|---|---|
| R&D Tax Relief | 20% above-the-line credit | SMEs engaged in qualifying R&D activities |
| Annual Investment Allowance | GBP 1 million | All businesses investing in plant/machinery |
| Full Expensing | 100% of qualifying investment | All businesses investing in plant/machinery |
| Enterprise Investment Scheme | GBP 5 million per year | High-risk SMEs |
| Seed Enterprise Investment Scheme | GBP 250,000 | Start-ups and early-stage companies |
| Patent Box | 10% corporation tax rate | Companies with qualifying patents |
The main benefit is the 20% above-the-line credit, which can reduce corporation tax liabilities or be claimed as a cash refund, enhancing cash flow for SMEs engaged in R&D.
Not all machinery qualifies. Only those that meet specific criteria set by HMRC are eligible for full expensing. It's essential to verify the eligibility of each asset before claiming.
The EIS targets more established SMEs and allows for larger investment amounts (up to GBP 5 million), whereas the SEIS is aimed at start-ups, with a lower investment cap of GBP 250,000 but offers higher tax reliefs to investors.
No, the Patent Box is only applicable to patents granted by the UK Intellectual Property Office, the European Patent Office, or certain other European jurisdictions.
SMEs can apply for these reliefs through their annual tax returns. It's advisable to consult with a tax professional to ensure all claims are accurate and compliant with HMRC guidelines.
Clarivian monitors tax relief changes in the UK daily and includes them in your morning brief. Start your free trial
Every morning at 07:00, get a personalised intelligence brief on your WhatsApp. Market signals, financial health, competitor moves, and three prioritised actions — in 4 minutes.