The UK Patent Box is a tax incentive that encourages companies to develop and retain innovative technologies in the UK. It allows qualifying companies to apply a reduced Corporation Tax rate of 10% on profits arising from patented inventions (instead of the standard 25% rate). This significantly reduces tax on profits from patented products or services. The scheme is designed to motivate businesses to patent and commercialise their inventions within the UK.
UK Patent Box Scheme: Overview and Eligibility
Purpose and Tax Benefit
The Patent Box was introduced to incentivise UK innovation. By taxing patent-related profits at 10%, companies have more funds to reinvest in R&D and intellectual property protection.
To use the scheme, a company must elect into the Patent Box within two years after the end of the accounting period in which the relevant profits arose. Once elected, the reduced rate applies to qualifying profits each year.
Who Can Claim
Not every company is eligible. To claim, a business must:
• Be a UK trading company subject to Corporation Tax.
• Own or exclusively license-in the qualifying patents or IP rights.
• Have undertaken qualifying development (i.e. made a significant technical contribution) to the patented invention.
• Earn profit from exploiting the qualifying IP.
• For group companies, play a significant role in managing the patent portfolio.
If a company’s patents were acquired or it paid connected parties for R&D, Patent Box relief may be partly limited by an “R&D fraction .”
R&D fraction explained: This rule makes sure the tax relief is linked to the R&D your business actually carries out. If some of the R&D was bought in or done by connected companies, the benefit may be scaled back. Where all R&D is done in-house or by independent subcontractors, the fraction is 1 and you get the full relief.
Qualifying Intellectual Property
The scheme applies to specific IP rights:
• Patents granted by the UK Intellectual Property Office, the European Patent Office, or certain EEA states.
• Equivalent rights such as marketing authorisations with data or market exclusivity (pharmaceuticals, veterinary medicines) and plant variety rights.
• The company must own the IP or hold an exclusive licence to use it.
The patent must be granted and in force. Pending or expired patents do not qualify.
Qualifying Profits
Only profits linked to the qualifying patents are eligible, including:
• Sales of patented products or products incorporating patented technology.
• Sale of patent rights.
• Licensing royalties.
• Infringement damages and settlements.
• Notional royalties where a patented process or tool is used in manufacturing or services.
Profits without a clear patent link do not qualify. Many companies use income streaming to separate qualifying profits.
Recent Updates (2023–2024)
• Corporation Tax increase (2023): The main rate rose from 19% to 25%, increasing the value of Patent Box savings.
• Small profits rate adjustment (2023): Legislation ensures Patent Box profits are always taxed at 10%, regardless of whether the company pays 19% or 25% elsewhere.
• R&D relief reform (2024): The UK merged R&D schemes into a single Expenditure Credit, but Patent Box calculations remain unchanged.
• HMRC compliance guidance (Nov 2024): New guidelines outline the evidence HMRC expects, including proof of patent grant dates, development contributions, and clear profit allocations.
Key Takeaways
• Patent Box applies a 10% Corporation Tax rate to profits from patented inventions.
• Companies must meet strict ownership, development, and income criteria.
• Profits must be directly linked to qualifying IP.
• The benefit is now more valuable due to higher main tax rates.
• Accurate documentation is essential, especially under HMRC’s updated compliance guidance.
For businesses considering a Patent Box claim, keeping robust records of patents, R&D contributions, and related income streams is critical. MSC R&D supports companies across all sectors in preparing well-evidenced claims aligned with the latest rules and regulations. You can read the full guidance from HMRC here.
