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What is the SEIS3 Form?
SEIS3 form for Seed Enterprise Investment Scheme (SEIS)
The SEIS3 form is a key component of the Seed Enterprise Investment Scheme (SEIS) in the UK. This form is used by investors who have made an investment in a qualifying company under the SEIS scheme. In this article, we will explore the SEIS3 form in more detail, including its purpose, requirements, and benefits.

What is the SEIS3 Form?
The SEIS3 form is used by investors who have made an investment in a qualifying company under the SEIS scheme. The form is used to claim tax relief on the investment and to report any disposals of the investment.
Requirements of the SEIS3 Form
The SEIS3 form is a relatively straightforward document, but it requires careful attention to detail to complete accurately. Here are some of the key requirements of the SEIS3 form:
Investor Information: The SEIS3 form requires investors to provide basic information about themselves, including their name, address, and National Insurance number.
Investment Information: The form requires investors to provide details about the investment made under the SEIS scheme, including the amount invested, the date of the investment, and the name of the qualifying company in which the investment was made.
Tax Relief Information: The SEIS3 form also requires investors to provide details about any tax relief claimed on the investment, including income tax relief and capital gains tax exemption.
Disposal Information: If the investor has disposed of the investment, the form requires details about the disposal, including the date of the disposal and the amount received.
Benefits of the SEIS3 Form
The SEIS3 form offers several benefits to investors who have made an investment in a qualifying company under the SEIS scheme. Here are some of the key benefits of the form:
Tax Relief: The SEIS scheme offers investors significant tax relief, including income tax relief, capital gains tax exemption, and loss relief. By completing the SEIS3 form, investors can claim this tax relief and reduce their tax liability.
Compliance: By completing the SEIS3 form, investors can ensure that they are in compliance with the rules and regulations of the SEIS scheme. This can help to avoid any potential penalties or fines for non-compliance.
Record Keeping: The SEIS3 form provides a record of the investment made under the SEIS scheme and any tax relief claimed. This can be useful for record-keeping purposes and for future reference.
Access to Future Investment Opportunities: By investing in a qualifying company under the SEIS scheme and completing the SEIS3 form, investors can gain access to future investment opportunities in early-stage companies, including through the follow-on EIS scheme.

How to Fill SEIS3 form?
This scheme encourages investors to take on higher-risk investments, which can help startups gain the funding they need to grow and succeed. If you are an investor who has supported a SEIS-eligible company, you will need to fill out the SEIS3 form to claim your tax relief. In this article, we will guide you through the process of filling out the SEIS3 form online.
Step 1: Gather the Necessary Information
Before you begin filling out the SEIS3 form, you will need to gather some information about your investment. You will need to know the following:
The name and registered address of the SEIS-eligible company in which you invested.
The date you made your investment.
The amount you invested.
The amount of income tax you paid in the tax year in which you made your investment.
Your Unique Taxpayer Reference (UTR) number.
The date of the SEIS3 certificate issued by the company.
You will also need to have a copy of the SEIS3 certificate issued by the company you invested in. This certificate confirms that the company is eligible for SEIS relief and that your investment qualifies for tax relief.
Step 2: Complete Section 1 of the SEIS3 Form
Section 1 of the SEIS3 form is where you provide your personal details, including your name, address, and UTR number. You will also need to provide the name and registered address of the SEIS-eligible company in which you invested.
Step 3: Complete Section 2 of the SEIS3 Form
Section 2 of the SEIS3 form is where you provide information about your investment. You will need to provide the following information:
The date you made your investment.
The amount you invested.
The name of the SEIS-eligible company in which you invested.
The date of the SEIS3 certificate issued by the company.
Step 4: Complete Section 3 of the SEIS3 Form
Section 3 of the SEIS3 form is where you claim your tax relief. You will need to provide the following information:
The total amount of income tax you paid in the tax year in which you made your investment.
The amount of tax relief you are claiming on your investment.
The amount of income tax you will be liable to pay for the tax year in which you are claiming relief.
The amount of income tax you will be liable to pay for the following tax year.
Step 5: Complete Section 4 of the SEIS3 Form
Section 4 of the SEIS3 form is where you declare that the information you have provided is accurate and complete. You will need to sign and date the form in this section.
Step 6: Submit the SEIS3 Form
Once you have completed the SEIS3 form, you will need to send it to HM Revenue and Customs (HMRC). You can submit the form online or by mail. If you submit the form online, you will need to upload a scanned copy of the SEIS3 certificate issued by the company you invested in. If you submit the form by mail, you will need to include a hard copy of the SEIS3 certificate.
It is important to note that you must submit the SEIS3 form within four years of the 31 January following the tax year in which you made your investment. For example, if you made your investment in the 2020-21 tax year, you must submit the SEIS3 form by 31 January 2025.
Where to Send Filled SEIS3 Form
To submit a filled SEIS3 form for the Seed Enterprise Investment Scheme in the UK, you should send it to the following address:
HM Revenue and Customs
SEIS Team
BX9 1EL
United Kingdom
What Happens After You Have Sent Filled SEIS3 Form?
After you have sent your filled SEIS3 form for the Seed Enterprise Investment Scheme in the UK, HM Revenue and Customs will process your application and review the information provided. They will assess whether you are eligible to participate in the scheme and if your application meets the requirements.
If your application is approved, you will receive a notification confirming your eligibility for SEIS and your unique reference number (URN). You can use this URN to claim tax relief on your qualifying investments.
If your application is rejected, you will be notified of the reasons for the rejection and any further steps you can take. You may be able to make changes to your application and resubmit it for reconsideration.
It's important to note that the processing time for SEIS applications can vary and may take several weeks or months. You should also ensure that you keep accurate records of your SEIS investments and tax relief claims, as you may need to provide these to HMRC for future tax purposes.

Should I Get Professional Help to Fill out the SEIS3 Form?
If you are considering applying for the Seed Enterprise Investment Scheme (SEIS) in the UK, it may be beneficial to seek professional help in filling out the SEIS3 form. The SEIS is a tax relief scheme designed to encourage investment in early-stage companies and startups, and it can be a complex process to navigate.
Professional assistance can help ensure that you meet all of the requirements and submit a complete and accurate application. Here are some reasons why you might want to consider professional help:
Expertise: Professional advisors have experience and knowledge of the SEIS application process and can help you avoid mistakes that could lead to the rejection of your application.
Time-Saving: Filling out the SEIS3 form can be a time-consuming process. Professional advisors can help you save time by guiding you through the process and completing the form on your behalf.
Maximizing Tax Relief: Professional advisors can help you identify all of the tax relief opportunities available to you and ensure that you maximize your benefits.
Compliance: SEIS rules and regulations can be complex, and it is easy to make mistakes. Professional advisors can help you comply with all the regulations and avoid any penalties.
Access to Resources: Professional advisors have access to a wealth of resources, including tax calculators and software, which can help ensure that your application is accurate and complete.
Thus, seeking professional help to fill out the SEIS3 form can be a wise decision, especially if you are not familiar with the SEIS application process. By doing so, you can increase your chances of success and maximize your tax relief benefits.
Conclusion
The SEIS3 form is a key component of the Seed Enterprise Investment Scheme (SEIS) in the UK. It is used by investors who have made an investment in a qualifying company under the SEIS scheme to claim tax relief and report any disposals of the investment. The SEIS3 form requires investors to provide basic information about themselves, details about the investment made, and any tax relief claimed.
By completing the SEIS3 form, investors can claim tax relief, ensure compliance with the rules and regulations of the SEIS scheme, and keep a record of the investment made. The SEIS scheme offers significant tax relief to investors and can provide access to future investment opportunities in early-stage companies.