What are the common mistakes made when submitting a Patent Box claim?

Patent Box claims are a valuable incentive for businesses and encourage them to keep and commercialise their Intellectual Property in the UK.

Companies can benefit from a reduced Corporation Tax rate of 10 per cent on profits earned from patented inventions and qualifying IP rights.

Detailed calculations and strict HMRC requirements can make Patent Box claims confusing and avoidable mistakes can result in them being rejected.

With the right preparation, businesses that profit from patents can create a successful claim and receive the tax savings they are entitled to.

Misidentifying qualifying IP

One of the most common mistakes when creating a Patent Box claim is assuming that all Intellectual Property (IP) qualifies.

Patent Box claims apply only to granted patents and certain qualifying rights. This does not include trademarks, copyrights, trade secrets and brand assets.

Claiming relief on non-qualifying IP can lead to HMRC challenges, delays and even repayment demands.

To avoid this, you must create a clear record of all granted patents, licences and ownership statuses.

Incorrectly calculating the qualifying profits

Even when your IP qualifies, many companies still miscalculate their profits and this is often due to a misunderstanding of HMRC’s streaming rules.

These rules require companies to track and separate their income that is linked to patented products.

Common errors include:

• Overestimating sales linked to patented products
• Mixing qualifying and non-qualifying income
• Failing to properly divide direct and indirect costs
• Failing to deduct the routine return (the general profit not attributable to IP)
• Failing to deduct the marketing asset return (the profit earned from branding rather than technology)

Companies must use accounting systems that can track revenue and costs by product line or IP asset to avoid these errors.

Patent Box calculations must be correct and professional guidance may be necessary to review and organise your finances compliantly.

Keeping informed on legislative changes

Patent Box has undergone significant changes, including mandatory streaming and increased Corporation Tax rates.

Businesses that do not keep up to date with recent legislation and how this affects them may be at risk of submitting incorrect claims.

Businesses should work with advisers to stay informed about the latest reforms and help them keep their claim updated with HMRC guidance.

How can we support your Patent Box claim?

Many businesses may be missing out on the full value of their Patent Box relief because they do not have complete visibility or control over their IP.

A well-managed patent portfolio allows you to spot infringements early, understand which patents generate income and ensure all qualifying IP is correctly included in your claim.

We work to calculate your qualifying profits accurately, confirm IP ownership and prepare your HMRC submission on your behalf.

As R&D tax consultants, we ensure your R&D Tax Credit claims work seamlessly alongside Patent Box relief and help you receive the maximum IP-related tax savings available.

Speak to our team today about how you could make a Patent Box claim.

Adam Bointon