The Patent Box allows UK companies to apply a reduced 10% corporation tax rate to profits derived from patented inventions. Here is what you need to know about eligibility, qualifying income, and how to make a claim.
The Patent Box is a UK government incentive that allows companies to elect to pay a reduced rate of corporation tax, currently 10%, on profits attributable to patented inventions and certain other qualifying intellectual property rights. The standard rate of corporation tax is 25%, meaning the Patent Box can represent a significant and recurring tax saving for eligible businesses.
The regime was introduced in 2013 and is administered by HMRC under Part 8A of the Corporation Tax Act 2010. It is designed to encourage companies to retain and commercialise their intellectual property in the UK, rather than licensing it offshore.
To qualify, a company must hold, or exclusively license in, a qualifying patent granted by the UK Intellectual Property Office, the European Patent Office, or certain other specified European patent authorities. The patent must be in force, and the company must have undertaken qualifying development activity in relation to it.
Qualifying income includes income from the sale of patented products, licence fees received in respect of the patent, and a proportion of income from products that incorporate a patented component. Infringement damages and certain insurance proceeds can also qualify.
The calculation of the Patent Box deduction follows a streaming or formulaic approach, and since 2016 has been subject to the OECD nexus rules, which link the proportion of qualifying profits to the level of R&D expenditure incurred by the claimant company. This means that companies which have outsourced significant R&D to connected parties may find their Patent Box benefit reduced.
Making a Patent Box election is straightforward. A company simply notifies HMRC within two years of the end of the relevant accounting period. However, the underlying calculation can be complex, particularly for businesses with multiple product lines or group structures. Specialist advice is strongly recommended to ensure the full benefit is captured and the claim is defensible on enquiry.
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Where intellectual property is held, and by whom, has a direct bearing on whether a company can access Patent Box relief. We examine the key structuring considerations for UK businesses.
One of the most common reasons companies fail to access the Patent Box is not that they lack qualifying patents. It is that the patents are held in the wrong entity. IP ownership structure has a direct and material impact on whether a company can make a Patent Box election, and on the quantum of relief available.
The Patent Box rules require that the claimant company either owns the qualifying IP outright, or holds an exclusive licence in respect of it. A non-exclusive licence is not sufficient. Where patents are held by a parent company and licensed down to operating subsidiaries on a non-exclusive basis, those subsidiaries will not be able to elect into the Patent Box.
For group structures, it is therefore important to consider whether IP should be held at the level of the entity that generates the qualifying income, or whether an exclusive licence arrangement can be put in place. Both approaches can work, but each has different implications for transfer pricing, withholding tax, and the nexus calculation.
The nexus approach adds a further layer of complexity. Even where a company holds the patent and generates qualifying income, the proportion of profits eligible for the 10% rate is scaled by reference to the ratio of qualifying R&D expenditure to total expenditure on the development of the IP. Expenditure on R&D subcontracted to connected parties is treated less favourably than expenditure on arm's length contractors or in-house R&D.
Companies considering restructuring their IP holdings should take care to ensure that any transfer of patents between group entities is undertaken at arm's length and properly documented. HMRC has the power to challenge arrangements that appear to have been entered into primarily for tax purposes, and the Patent Box rules contain specific anti-avoidance provisions.
Early-stage businesses should consider IP ownership from the outset. Ensuring that patents are applied for and granted in the name of the correct entity, and that employment and contractor agreements properly vest IP ownership in the company, can avoid costly restructuring at a later stage.
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Our specialists can assess your eligibility and quantify the relief available to your company.
Understanding the nexus approach: R&D expenditure and Patent Box claims
Since 2016, the Patent Box regime has operated under the OECD nexus approach, which links the proportion of qualifying profits to the level of R&D expenditure incurred by the claimant company. We explain how this works in practice.
The nexus approach was introduced into the UK Patent Box regime in 2016, following agreement at OECD level that preferential IP regimes should be linked to substantive economic activity in the jurisdiction offering the relief. The aim was to prevent companies from simply parking IP in low-tax territories without conducting meaningful R&D there.
Under the nexus approach, the proportion of qualifying IP profits that can benefit from the 10% Patent Box rate is determined by the nexus fraction, which compares the company's qualifying R&D expenditure to its total expenditure on developing the relevant IP.
Qualifying expenditure (the numerator) includes expenditure on R&D carried out by the company itself, and expenditure on R&D subcontracted to unconnected third parties. A 30% uplift is applied to the qualifying expenditure figure, subject to a cap at total expenditure, to provide some headroom for connected-party subcontracting.
Non-qualifying expenditure (which reduces the fraction) includes expenditure on R&D subcontracted to connected parties, and the cost of acquiring the IP itself. This means that companies which have purchased patents from group companies, or which rely heavily on connected-party R&D, will find their Patent Box benefit reduced, sometimes significantly.
The nexus fraction is calculated separately for each IP right, or for a sub-stream of IP rights where the company elects to group them. Getting the streaming right is important: grouping IP with very different nexus fractions can dilute the overall benefit, while streaming them separately preserves the full relief on high-nexus IP.
Companies that have historically subcontracted R&D to connected parties should not assume that the Patent Box is unavailable to them. The 30% uplift, combined with careful streaming, can still produce a meaningful benefit. A detailed review of R&D expenditure records, often going back several years, is typically required to establish the correct nexus fractions and quantify the available relief.
Ready to explore your Patent Box position?
Our specialists can assess your eligibility and quantify the relief available to your company.