SEIS and EIS Explained: Maximising Investment Opportunities for UK Startups

Securing outside investment can be a game-changer for any UK startup. But with so many early-stage businesses competing for funding, how do you make your company stand out to risk-wary investors?

That’s where two of the government’s most powerful investment schemes - the Seed Enterprise Investment Scheme (SEIS) and the Enterprise Investment Scheme (EIS) - come in. These initiatives don’t just help startups raise cash; they also offer investors compelling tax incentives, making your venture a more attractive proposition.

If you’re building a business and planning your next investment round, understanding SEIS and EIS could be the key to unlocking growth. In this guide, we’ll break down how each scheme works, who they’re for, and how you can use them to move your startup forward confidently.

What Are SEIS and EIS - And Why Do They Matter?

Raising capital is often one of the main hurdles for new and growing businesses. SEIS and EIS are government-backed initiatives designed to bridge this gap. In a nutshell, they:

• Reward investors for supporting early-stage UK businesses with generous tax breaks
• Help founders attract the crucial funding they need to survive, grow, and innovate
• Reduce the risk for investors, making them more likely to take a chance on your company

Choosing the right scheme - or using both as your business develops - can make all the difference when it comes to building momentum and making the most of every investment opportunity.

How Does SEIS Work?

Think of SEIS as a launchpad for the UK’s newest and smallest startups. It’s tailored specifically for businesses at the very earliest stages that need their first significant investment from outside sources.

Who Is SEIS For?

• Companies that have been trading for less than three years
• Fewer than 25 employees at the time of investment
• Gross assets of no more than £350,000 before issuing SEIS shares
• Up to £250,000 can be raised through SEIS investments across the company’s lifetime

The scheme’s designed to help businesses while the risk is highest for investors - hence why the incentives for those investors are particularly generous.

What Are the Investor Incentives with SEIS?

• 50% Income Tax Relief - investors can claim back 50% of the value of their investment (up to £200,000 per tax year) against their income tax bill
• No Capital Gains Tax - any gains from selling the SEIS shares (if held for at least three years) are tax-free
• Loss Relief - if the investment fails, investors can offset losses against their own tax bill, reducing risk even further

These incentives make it far easier for founders to find people willing to invest in young, unproven ventures - often at the stage where it’s hardest to attract funding through traditional loans or venture capital.

What Is EIS and How Is It Different?

As your business gets off the ground and starts to scale, EIS becomes the next logical step. EIS is aimed at growing companies and allows for significantly larger fundraising rounds and less restrictive eligibility rules.

Who Is EIS For?

• Companies trading for less than seven years (or ten years for “knowledge-intensive” companies)
• Up to 250 employees (or 500 for knowledge-intensive companies)
• Gross assets of up to £15 million before investment (and £16 million after)
• Can raise up to £5 million per year, with a lifetime total of £12 million

EIS is ideal if your startup is ready to scale or take on more ambitious growth but still needs to raise substantial capital from private investors.

What Tax Benefits Does EIS Offer?

• 30% Income Tax Relief - investors can claim back 30% of their investment (up to £1 million per year, or £2 million if investing in knowledge-intensive companies)
• Capital Gains Tax Deferral - investors can defer capital gains by reinvesting them in new EIS shares
• No Capital Gains Tax - any gains on EIS shares held for over three years are exempt
• Inheritance Tax Relief - no inheritance tax applies after shares are held for two years
• Loss Relief - investors can offset any losses against their tax bill, further reducing risk

It’s worth noting that while both SEIS and EIS are open to individual investors, corporate investors (e.g., companies funding other companies) can take part, but only individuals receive the tax reliefs.

SEIS vs EIS: Side-by-Side Comparison

Understanding the differences at a glance is invaluable. Here’s a quick comparison:

Feature	SEIS	EIS
Company Age	Up to 3 years	Up to 7 years (10 for knowledge-intensive companies)
Max Employees	25	250 (500 for KICs)
Gross Assets Max	£350,000	£15m (£16m post-investment)
Max Lifetime Raised	£250,000	£12m (£20m for KICs)
Investor Annual Limit	£200,000	£1m (£2m KICs)
Initial Tax Relief Rate	50%	30%
CGT Exemption	Yes	Yes
Loss Relief	Yes	Yes

In short: SEIS is for earlier, riskier, smaller companies with more generous reliefs. EIS covers bigger, more established businesses - with scope for larger investment rounds and scaling up.

Which Scheme Should Your Startup Use?

The honest answer is - it depends on where you are in your growth journey. Here’s how you might weigh it up:

• Just starting out? If your company is less than three years old, with limited assets and a small team, SEIS is likely the best fit. It’s specifically designed to attract investment into high-risk, pre-revenue or newly trading startups.
• Ready to grow? If you’ve gained momentum, your business is approaching (or past) the three-year mark, or you want to raise over £250,000, then EIS may suit you better.
• Can you use both? Absolutely - just not on the same investment round. Many startups raise their first round under SEIS, then use EIS for later, larger rounds as they scale. This staged approach helps keep your business investment-friendly throughout your early years.

For more details, check out our in-depth guide on SEIS vs EIS differences.

What Are the Key Investor Benefits for Startups to Highlight?

Knowing exactly what makes SEIS and EIS so appealing is vital when pitching to investors. The main benefits to highlight are:

• Generous tax breaks that reduce their overall investment risk
• Potential for high returns - particularly if your business is a success and grows quickly
• Investment flexibility - both schemes allow investments in multiple companies or across several years, hedging risk
• Loss relief - which means losses on any investment (should the worst happen) can be written off against income or capital gains
• Inheritance tax planning benefits under EIS, for those looking at long-term investment strategies

Making these points clear in your investor documents, pitch decks and 1-to-1 conversations can significantly boost your fundraising power.

How Do You Apply for SEIS or EIS? What’s Required?

Accessing SEIS or EIS is a matter of ticking some key boxes and keeping HMRC updated at each stage. Here’s a broad overview:

1. Check your eligibility: Break down the staff, age, assets, and business activity requirements based on which scheme you’re applying for. Make sure you meet all the criteria before you promise tax relief to potential investors.
2. Advance assurance: Before you raise funds, it’s wise to apply for advance assurance from HMRC. This isn’t mandatory, but showing investors that you have pre-approval for SEIS or EIS status gives them confidence they’ll get the promised tax relief.
3. Issue the shares: Once you’ve raised the funds (after advance assurance, if you obtained it), issue new shares in your company to the qualifying investors, making sure to follow the technical rules for share types (for example, ordinary shares only).
4. Submit your compliance statement: Within a set timeframe after the share issue, send the required forms to HMRC, confirming you’ve met all the terms (typically SEIS1/EIS1 forms).
5. Give investors their certificates: Once HMRC signs off, you’ll receive official certificates to pass on to your investors. They’ll need these to claim their tax relief.

Be aware: The requirements around how the funds are spent, qualifying business activities (such as not dealing in land, financial services, or certain excluded sectors), and how long the shares must be held are strict. You must comply throughout - so keep good records and be ready for questions from HMRC.

For more on what documents and registrations matter at startup stage, visit our checklist of startup essentials.

Do You Need Advance Assurance - And How Does It Work?

Yes, we recommend it. Advance assurance is an indication from HMRC that your company - if it sticks to its current business plan and facts - will likely qualify for SEIS or EIS when shares are issued.

It’s not legally binding, but it makes investors much more comfortable when committing funds. To apply, you’ll need:

• Your business plan and financial forecasts
• Details of your structure, trade, and investors (if known)
• A draft or template share subscription agreement
• Details of how you meet the eligibility requirements

If you want expert help preparing for advance assurance, our team at Sprintlaw can walk you through the whole process.

Key Compliance Considerations for SEIS and EIS Startups

Getting SEIS or EIS status is only the beginning. To keep your investors protected (and maintain their tax reliefs) you need to make sure your company plays by the rules. Some important tips:

• Funds must be deployed on a qualifying trade - and spent within three years of receiving investment
• No returning capital to investors - you can’t pay dividends over a certain threshold, redeem shares, or guarantee returns
• No significant non-qualifying activities - such as banking, farming, legal, or dealing in land/securities. Review the full HMRC guidance or chat to an expert if you’re unsure
• Report to HMRC if you breach any conditions - as this can revoke the company’s SEIS/EIS status and cost your investors their reliefs

For growing startups, this means regularly reviewing your operations as you diversify, take on new business, or tweak your structure.

How Do SEIS and EIS Fit into Your Overall Fundraising Strategy?

Both schemes are designed to get money into ambitious startups, but to make the most of them, consider a few basics:

• Stage your fundraising: Many founders use SEIS for their seed round, then move to EIS as they expand. This keeps you attractive to a broad range of investors at every stage.
• Always do your homework: Before making any promises, thoroughly check which scheme your company qualifies for - or whether you could soon graduate from one to the other.
• Tailor your pitch: Investors who are eligible for SEIS and EIS tax relief are much more likely to back your business than those who aren’t. Make sure your communications, pitch decks, and investment documents highlight the appropriate scheme.
• Get your paperwork right: The HMRC process for these schemes can be complex, with deadlines and technicalities. Missing a step or filing a document late can put investors’ reliefs at risk.

Want a deeper dive into raising investment itself? See our guide on raising capital in the UK.

What Legal Documents and Support Do You Need?

Proper legal foundations are essential for any startup, especially when raising funds under SEIS or EIS. The core documentation you’ll need typically includes:

• Articles of Association (which sometimes need amending to meet scheme requirements)
• Share Subscription Agreements outlining the investment terms
• Shareholders’ Agreements to manage relationships between investors and founders
• Board minutes and resolutions authorising new share issues and approving SEIS/EIS applications
• Records for complying with business regulations and reporting requirements

Avoid using off-the-shelf templates - the requirements for SEIS and EIS are nuanced, and the impact on future rounds, voting rights, and exit strategies can be significant. It’s wise to get these documents drafted or reviewed by a specialist startup lawyer.

Key Takeaways: SEIS and EIS for Startups

• SEIS is ideal for very early-stage startups, offering 50% tax relief and designed to attract risk-tolerant investors to new businesses with lower assets and employee numbers.
• EIS is for more established, growth-stage startups, supporting larger investments and wider eligibility but at a slightly reduced (30%) income tax relief rate.
• Both schemes can be utilised - often SEIS first, then EIS - as your business grows, enabling you to raise capital through different stages while maintaining investor appeal.
• Applying for advance assurance can boost investor confidence, but detailed eligibility and ongoing compliance are essential - so keep meticulous records and follow up with HMRC at every stage.
• Use tailored legal documentation - not generic templates - to ensure your company and your investors are fully protected, and you comply with the letter of the law.
• If you’re unsure about which scheme to use or how to apply, it’s best to chat to a legal expert early in the process to maximise your opportunities and minimise problems later on.

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If you’d like help making the most of SEIS and EIS, or you’re planning your next investment round, our team can guide you every step of the way - from eligibility checks and compliance to legal documents and investor relations.
Call us on 08081347754 or email team@sprintlaw.co.uk for a free, no-obligations chat about how we can support your startup’s growth.