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Patent Box tax relief

What is Patent Box?

Our IP prosperity offering includes Patent Box support. Businesses that invest in developing and exploiting intellectual property should be rewarded and Patent Box is designed to do exactly that.

This scheme is administered by HMRC and is designed to reward innovative UK companies. Patent Box incentivises a company to keep their IP within the UK and rewards them for doing so by reducing the Corporation Tax on profits resulting from qualifying IP income to 10%.

Even if the patented element of the product or process is minor, 100% of a company’s worldwide profits arising from qualifying IP income should qualify for the 10% Patent Box corporation tax relief.

Corporation Tax increased from 19% to 25% from 1 April 2023 for companies with profits over £250,000, increasing the benefit of claiming Patent Box.


of Patent Box benefit delivered to our clients in 2021


the average claim projected for Patent Box in 2021-22*


companies opted into Patent Box for 2021-22*

Can my business claim Patent Box relief?

Many companies don’t think that their Intellectual Property (IP) is patentable, or they think that the patenting process is too expensive and takes too long to be worthwhile. The Patent Box has been specifically designed to overcome these misconceptions and the tax relief potentially covers the costs.

To benefit you need to be a UK limited company paying UK corporation tax. You need to have:

*Other territories may apply.

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Possible to qualify for Patent Box tax relief with a UK, European and some international patents, or with exclusive UK licence to someone else’s patent if it is recognised and in scope.


The scheme incudes IP profits derived from worldwide sales and patent licence revenue.


Potential for reduction in corporation tax rate to be backdated to revenues generated during the “patent pending” phase.

What makes a Source Advisors Patent Box report different

Source Advisors will calculate the profits that are generated from patented products for inclusion in your Corporation Tax return. We will record the profits generated from patents that have been applied for but not yet granted.

But more than that we will prepare a Patent Box report that is attached to the Corporation Tax return that identifies the:

  • Patented profits figure together with a high level review of how the figures have been arrived at and any assumptions.
  • Internal competitive impact of the patented products. We identify the synergy between the strength of a patent and the profits it may bring to a business.
  • External competitive impact of the patented products. We identify the competitors that may have been building on our clients’ patented technology based on citations from third-party patent applications referring back to our clients’ granted patents. This is significant, as it shows which companies are either monitoring our clients’ IP activity or the companies that are active within a similar IP space to our client.


To qualify for the Patent Box scheme, first of all, you need to be a UK limited company and paying UK Corporation Tax. Secondly, you need to have developed an innovative product or process and filed a patent application. Finally, you need to have generated profits relating to that patented invention.

We find that many patented inventions are small technical improvements to established products or processes. These tweaks can be patented and may only be minor but all of your worldwide profits that are generated from that product should qualify for the rate of 10% Corporation Tax. This can result in thousands of pounds of tax savings, every year.

To claim you need to elect into the Patent Box scheme and need the patent to have been granted. This must be done within 2 years after the end of the accounting period which contained the relevant profits and income. You can make an election in the computations accompanying your Company Tax Return or separately in writing. For patents applied for, but not granted while you are in the Patent Box scheme, you can accrue for these patented profits. Once the patent is granted these cumulative profits can be included in the Patent Box claim.

There is no special form of words for this election and no box on the Corporation Tax return.

Ensure your business recognises and receives the full credit it is due with our R&D tax relief services

Our IP services, including Patent Box, are closely linked with R&D tax relief and a company can often claim tax relief under both schemes. Source Advisors  can offer you advice to maximise your claims across both schemes. Find out more about our R&D tax relief services.

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