Step by Step Guide to Claiming SEIS Tax Relief

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How to Claim your Investment Relief

If you have already invested through SEIS, scroll further down to step 1. If you haven’t invested or heard of the Seed Enterprise Investment Scheme (SEIS), it provides a number of tax reliefs to investors, ranging from automatic reductions to loss relief and capital gains avoidance. Some of these are dependent on your individual tax bracket.

In order to gain from most of the tax reliefs outlined below you must hold qualifying shares in a start up for a minimum of three years.

These are the tax reliefs you can get through the SEIS:

* Please note, Tax benefits are subject to personal circumstances. Subject to changes. 

Most people claim their SEIS tax relief when they pay their taxes, so for self-assessment that is any time before the 31st of January, but in 2021 this has been extended to 28th February. This step-by-step guide will show you how to claim SEIS whilst filling out your online tax return form.


On section 3 of the online tax return form, the final question asks if you are claiming “other tax reliefs”, please select “Yes” if you wish to claim SEIS.

*Section 3 of Online Tax Return Form*


As requested by the online form, please complete the “Unlisted shares and securities” section to claim your SEIS tax relief.

*Section 4 of Online Tax Return Form*

Every eligible company you invest in will have its own SEIS3 certificate. If you invest through a fund into a portfolio, then you will receive a certificate for each of the companies. In order to successfully claim your SEIS tax relief, you will need the SEIS3 certificates corresponding to your investments. These certificates contain the information you will need such as:


Enter the value of your SEIS investments into the highlighted question on the online tax return form.

*Section 4 page 2 of Online Tax Return Form*


Go on to complete the rest of the form and that’s it.

Simple as that!

We hope you found this guide clear and easy to follow. Please note, the above information is not tax advice. If in doubt, please consult HMRC’s full guidance on the subject, or consult a tax specialist.

If you are interested in learning more about SEIS investments, we invite you to read more about our upcoming SEIS fund. Feel free to reach out to anyone in the team regarding SEIS/EIS investments.

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