Claiming SEIS and EIS Tax Relief Made Simple
Claiming UK tax incentives shouldn’t feel like deciphering an ancient language. If you are an investor looking to cut your income tax bill or a startup founder preparing to issue tax certificates, understanding how to claim SEIS and EIS tax relief correctly is vital. The Seed Enterprise Investment Scheme (SEIS) and Enterprise Investment Scheme (EIS) offer some of the most generous tax breaks in the world, including up to 50% income tax relief on SEIS and 30% on EIS. However, navigating the administrative pipeline between HM Revenue & Customs (HMRC), the company, and the investor requires strict adherence to precise rules and deadlines.
At Oriel IPO, we streamline this entire process by connecting forward-thinking investors with vetted, early-stage UK companies. Whether you want to explore SEIS and EIS investments or navigate the compliance steps for your business, getting your documentation right is the key to unlocking these benefits. In this comprehensive guide, we unpack the exact steps required for both companies and individual investors to secure their tax reliefs without unnecessary delays.
What Are SEIS and EIS Tax Reliefs?
Before jumping into the paperwork, let us break down what these schemes actually deliver to your wallet. Both programs were established by the UK government to encourage private investment into early-stage, high-growth businesses.
Seed Enterprise Investment Scheme (SEIS)
SEIS is tailored for early-stage startups. Because early-stage businesses carry higher risk, the incentives are higher:
- Income Tax Relief: Claim back up to 50% of the amount invested against your UK income tax bill for the current or previous tax year (up to an investment cap of £200,000 per tax year).
- Capital Gains Tax (CGT) Reinvestment Relief: Exempt up to 50% of a capital gain from CGT when you reinvest that gain into SEIS-qualifying shares.
- Loss Relief: If the startup fails, you can offset the net loss (minus the initial income tax relief already claimed) against your income tax or capital gains tax.
- Tax-Free Growth: No CGT is due on profits made when selling SEIS shares held for at least three years.
Enterprise Investment Scheme (EIS)
EIS targets slightly more mature, scaling companies:
- Income Tax Relief: Claim up to 30% income tax relief on investments up to £1 million per tax year (or up to £2 million if investing in knowledge-intensive companies).
- CGT Deferral Relief: Defer paying capital gains tax accrued from selling another asset if you reinvest those gains into EIS shares.
- Loss Relief: Similar to SEIS, loss relief protects your downside risk if the business does not succeed.
- Inheritance Tax (IHT) Relief: EIS shares generally qualify for Business Property Relief (BPR) after two years of ownership, removing them from your taxable estate.
To capture these benefits, both the business and the investor must follow a structured, multi-step compliance process.
Part 1: How Startups Issue SEIS3 and EIS3 Certificates
Investors cannot claim tax relief until the startup successfully completes its obligations with HMRC. A business cannot simply issue a receipt; it must submit formal compliance statements.
Step 1: Complete Advance Assurance (Optional but Recommended)
While not mandatory, applying for Advance Assurance from HMRC before raising funds gives investors confidence. It acts as an official nod from HMRC confirming that your business model, trade, and corporate structure meet the legal criteria for SEIS or EIS status.
Step 2: Issue Shares and Spend the Investment
To qualify for tax relief:
- Shares issued must be full-risk, ordinary shares paid up in cash.
- For SEIS, the business must have spent at least 70% of the raised funds on qualifying business activities before submitting the compliance form, or have been trading for at least four months.
- For EIS, the company must have been trading for at least four months before submitting the claim.
Step 3: Submit Form SEIS1 or EIS1 to HMRC
The company submits a formal compliance statement (Form SEIS1 for SEIS or Form EIS1 for EIS) to HMRC. This document outlines:
- Details of the share issue and total funds raised.
- Confirmation of qualifying trade activity.
- Investor details (names, addresses, and share amounts).
- Articles of Association and financial accounts.
Step 4: Receive Unique Reference Numbers and Form SEIS3/EIS3
Once HMRC reviews and approves the compliance statement, they send the company a authority letter along with official tax certificates (SEIS3 or EIS3 forms). The company then completes these certificates and distributes them to every participating investor.
Founders looking for structured guidance on funding preparation can learn about SEIS startup investment to ensure their round is executed correctly from day one.
Part 2: How Investors Claim SEIS and EIS Tax Relief
Once you receive your physical or digital SEIS3 or EIS3 certificate from the startup, you are ready to claim your relief. How you execute the claim depends on whether you complete a Self-Assessment tax return or pay tax via PAYE.
Method 1: Claiming via Self-Assessment (Most Common)
If you complete an annual UK Self-Assessment tax return, claiming your relief is straightforward:
- Locate the Additional Information Page: On your tax return (Form SA100), navigate to the SA101 supplementary section.
- Fill in the Investment Details: Under the


