Patent Box Relief

CLAIMING patent box relief

The Patent Box is a corporation tax relief designed to encourage companies to develop, retain, and commercialise intellectual property in the UK.

Often claimed alongside R&D Tax Reliefs, it’s particularly effective for businesses that have moved beyond the development stage and are now generating profits from patented technology.

For IP‑driven companies – especially those in engineering, software, life sciences, and advanced manufacturing – the combined impact of these incentives can significantly reduce the long‑term effective tax rate.

The relief allows profits attributable to qualifying patented inventions to be taxed at an effective corporation tax rate of 10%, substantially lower than the main rate.

 

How to successfully claim

Patent Box relief sits at the intersection of tax, intellectual property, and technology. Successful claims require a strong understanding of the underlying science and engineering, the commercial model, and HMRC’s detailed technical guidance.

Our Patent Box specialists will support you claim by:

• Assessing eligibility, ownership and licensing arrangements
• Identifying and mapping qualifying income streams
• Designing and implementing robust streaming methodologies
• Applying nexus and R&D fraction calculations
• Preparing defensible computation notes and enquiry support packs

Contact us today for a free consultation to discuss your eligibility to claim.

Patent Box relief faqs

What is Patent Box relief?

The UK Patent Box is a Corporation Tax relief designed to encourage companies to develop, retain and commercialise intellectual property within the UK. Where the statutory conditions are met, the scheme allows profits attributable to qualifying patented inventions to be taxed at an effective Corporation Tax rate of 10%, instead of the main rate

 

Who can claim Patent Box relief?

A company may claim Patent Box relief if all of the following conditions are met:

• The company is subject to UK Corporation Tax.
• The company makes profits from exploiting qualifying intellectual property rights.
• The company either owns the qualifying patent or holds a qualifying exclusive licence.
• The company has undertaken qualifying development activity in relation to the patent or a product incorporating the patented invention.

Where the company is part of a group, HMRC also requires the claimant to meet an active ownership condition. This requires the company to play a significant role in managing and exploiting the patent portfolio, rather than holding legal title in a passive capacity.

 

What patents and rights qualify for Patent Box relief?

Patent Box applies to patents granted by:

• The UK Intellectual Property Office.
• The European Patent Office.
• Certain national patent offices within the European Economic Area that are specifically recognised in the legislation.

In addition to patents, the scheme can also apply to certain medicinal and botanical innovation rights. These are particularly relevant to life sciences companies where market exclusivity arises through regulatory schemes rather than patents alone.

 

Can I claim if I hold an exclusive licence to the patent?

A company does not need to own the patent outright to claim Patent Box relief. The scheme also applies where the company holds an exclusive licence to exploit the patent. However, HMRC applies a strict definition of exclusivity.

 

What is ‘Qualifying income’ when claiming Patent Box relief?

Qualifying income can include:

• Income from selling patented products, including products that incorporate the patented invention and bespoke spare parts that embody the patented technology.
• Licence fees and royalties received from granting rights under qualifying patents.
• Proceeds from selling or assigning patent rights.
• Damages, settlements and insurance receipts arising from patent infringement.

 

What are Patent Box elections?

To benefit from Patent Box, the company must make an election. This election must be made within two years after the end of the accounting period in which the relevant profits arise. It is commonly made within the Corporation Tax computation or in a separate written notice to HMRC.

Once made, the election remains in place until revoked. If an election is revoked, the company cannot re enter the regime for five years.

 

What’s the difference between R&D Tax Reliefs and Patent Box relief?

Patent Box reliefs and R&D Tax Reliefs serve different purposes but work best together. R&D Tax Relief supports innovation costs during development, while Patent Box rewards successful commercialisation once profits arise.

 

How do I calculate Patent Box relief?

Patent Box relief is calculated through a series of statutory steps. In simplified terms, these involve:

1. Identifying relevant IP income.
2. Allocating associated costs to determine profits attributable to that income.
3. Removing a routine return that represents profits from routine functions.
4. Applying the R&D fraction where required.
5. Calculating the additional deduction that produces the 10% effective rate.