If you are raising investment for your UK startup and you are not using EIS or SEIS, you are making fundraising significantly harder than it needs to be.
Over twelve years of consulting, I have helped clients raise over £15 million through these tax-advantaged investment schemes. The difference in investor appetite is stark: when we structure deals with EIS or SEIS qualification, we typically see 40 to 60% more investor interest and close funding rounds two to three months faster. That is not a claim — it is data from actual client engagements.
The Enterprise Investment Scheme (EIS) and Seed Enterprise Investment Scheme (SEIS) are among the most generous investor tax relief programmes in the world. They were designed specifically to encourage investment into early-stage UK companies, and they work. In 2023-24, over £2.3 billion was invested through these schemes into more than 4,000 companies.
Yet I still encounter founders who either do not understand these schemes or assume they are too complicated to pursue. The reality: yes, there are rules to follow, but the effort-to-reward ratio is exceptional. This guide gives you everything you need to understand both schemes, get advance assurance from HMRC, and structure your fundraising to maximise investor appeal.
What This Guide Covers
- The specific tax benefits for investors under both EIS and SEIS
- Detailed eligibility criteria for UK startups — and the traps founders fall into
- How advance assurance works, why it is essential, and how to apply it successfully
- The risk-to-capital condition that catches many applicants out
- Post-investment compliance obligations that too few founders understand
- Real client case studies with measurable outcomes
- When these schemes do not make sense — and what to do instead
SEIS: What It Is and Why It Matters
SEIS was introduced in 2012 specifically for companies at the earliest stages of development. Think of it as EIS’s more generous younger sibling — designed for genuinely nascent ventures where the investment risk is highest.
The Tax Benefits Investors Receive Under SEIS
The SEIS tax reliefs are genuinely impressive, and understanding them in detail helps you clearly explain the value proposition to potential investors.
Income Tax Relief of 50%. An investor putting £100,000 into your SEIS-qualifying company can claim £50,000 back against their income tax bill. That is an immediate 50% return before your company does anything. For an angel investor weighing up investment options, this changes the risk calculus entirely.
Capital Gains Tax Exemption. When investors eventually sell their shares, assuming they have held them for at least three years, any gains are completely free of CGT. If your company grows from a £500,000 valuation to £5 million, that investor’s stake could be worth £1 million, and they pay zero tax on the £900,000 gain.
CGT Reinvestment Relief. If an investor has a capital gain from selling another asset, they can defer paying tax on that gain by investing in SEIS shares. This provides an additional 50% relief on the gain reinvested, a compelling incentive for investors who have recently sold property or another business.
Loss Relief. If your company fails — and statistically, many early-stage companies do — investors can offset their losses against income or capital gains tax. With the 50% income tax relief already received, this effectively reduces the maximum potential loss to 38.5p for every £1 invested for additional rate taxpayers.
To make this concrete: an investor who commits £100,000 receives £50,000 back immediately through income tax relief. If the company fails entirely, they can claim loss relief on the remaining £50,000 — leaving a net cost of approximately £27,500. They are risking 27.5p of every £1 they commit. For early-stage investment, that is a genuinely attractive risk profile.
SEIS Eligibility: What Your Company Must Meet
Not every company qualifies, and HMRC is specific about the requirements. The eligibility criteria that matter most for founders are:
Age and size limits. Your company must be less than two years old when shares are issued, have fewer than 25 employees, and have gross assets of less than £350,000 before investment (rising to £500,000 immediately after). You must not have raised more than £250,000 in total through SEIS across your company’s lifetime.
Qualifying trade. Your business must be carrying on a qualifying trade. Most commercial activities qualify, but HMRC specifically excludes financial activities (banking, insurance, money-lending), property development, legal and accounting services, farming and market gardening, hotel and care home management, and the production of coal or steel. If your business has any element of these activities, take advice before applying.
UK permanent establishment. You must have a genuine UK presence. This does not mean every team member needs to be UK-based, but a real establishment in the UK is required.
Risk-to-capital condition. Introduced in 2018, this requires that the investment carries meaningful risk and that your business has genuine growth objectives. I cover this in detail below — it is where the majority of unsuccessful applications fall down.
SEIS in Practice: A Real Client Example
One of my earlier clients, a food content platform, used SEIS to raise their initial £150,000. The founding team had strong industry experience but limited personal capital.
When they approached 15 angel investors, 11 said they would only invest if the company qualified for SEIS. That feedback is instructive — it is not unusual. We secured advance assurance from HMRC, and within six weeks of confirmation, they had closed their round with eight investors. The 50% income tax relief was the deciding factor for five of those investors — they told us directly that the risk-adjusted return made the difference between investing and passing.
Three years later, the company was acquired. Those early SEIS investors received a 4.2x return on their investment, free of CGT. Without SEIS, I am confident that the round would have taken four to six months longer to close, if it closed at all.
EIS: What It Is and How It Differs
EIS has been running since 1994 and is designed for companies beyond the seed stage but still in relatively early growth phases. It is the larger, more established scheme and offers slightly less aggressive relief than SEIS, but with substantially higher investment limits.
The Tax Benefits Investors Receive Under EIS
Income Tax Relief of 30%. Investors can claim 30% income tax relief on investments up to £1 million per tax year — or £2 million if investing in knowledge-intensive companies. That is up to £300,000 returned against their tax bill on a single investment.
Capital Gains Tax Exemption. As with SEIS, any gains on EIS shares held for at least three years are completely CGT-free. For successful exits, this is transformative for investor returns.
CGT Deferral Relief. EIS offers unlimited CGT deferral — unlike SEIS’s additional 50% relief, investors can defer paying CGT indefinitely by investing gains into EIS shares. The deferred gain becomes payable only when they eventually dispose of the EIS shares.
Loss Relief. Similar to SEIS, failed investments allow investors to claim loss relief against income or capital gains. For higher-rate taxpayers, this reduces the effective loss to around 38.5p per £1 invested.
Inheritance Tax Relief. This is the major additional benefit that SEIS does not offer. EIS shares held for at least two years qualify for Business Property Relief, meaning they can be passed on free of inheritance tax. For investors with significant estates, this is often the primary motivation — not the income tax relief.
EIS Eligibility: What Your Company Must Meet
EIS has similar but distinct requirements from SEIS. The key thresholds are:
Age and size limits. Your company must be less than seven years old when shares are issued (ten years for knowledge-intensive companies). You must have fewer than 250 employees (500 for knowledge-intensive companies) and gross assets of less than £15 million before investment. The maximum lifetime fundraising under EIS and VCT schemes combined is £5 million (£10 million for knowledge-intensive companies, £12 million including other schemes).
Qualifying trade with risk. The same qualifying trade requirements as SEIS apply, plus the risk-to-capital condition must be met. At least 80% of the money raised must be spent within two years on qualifying activities.
Not listed. The company cannot be listed on a recognised stock exchange.
SEIS vs EIS: The Key Differences at a Glance
| Feature | SEIS | EIS |
|---|---|---|
| Income Tax Relief | 50% | 30% |
| Maximum per investor (annual) | £200,000 | £1-2 million |
| Maximum company can raise (lifetime) | £250,000 | £5-12 million |
| CGT Exemption on gains | Yes (3 years) | Yes (3 years) |
| CGT Reinvestment Relief | 50% of gain | 100% deferral |
| Loss Relief | Yes | Yes |
| IHT Relief | No | Yes (after 2 years) |
| Company age limit | Under 2 years | Under 7 years |
| Employee limit | Under 25 | Under 250 |
| Asset limit (pre-investment) | Under £350,000 | Under £15 million |
When to Use SEIS vs EIS
Use SEIS if you are genuinely at the seed stage (under two years old, fewer than 25 employees, raising £250,000 or less) and want to offer investors the maximum tax incentive. Use EIS if you have exhausted your SEIS allowance, are raising more than £250,000, have been trading for more than two years, or your investor base includes older, wealthier individuals for whom IHT relief is a meaningful consideration.
Many of our clients raise SEIS first and then move to EIS for subsequent rounds. You cannot have both schemes active simultaneously for the same share class, but a sequential approach — SEIS for the seed round, EIS for the Series A — is both common and effective.
Advance Assurance: Why It Is Non-Negotiable
Advance assurance is written confirmation from HMRC that your company is likely to qualify for EIS or SEIS. It is not legally required. In practice, it is essential.
Most experienced angel investors will not commit funds without it. They are not going to invest £100,000 expecting 50% tax relief only to find out twelve months later that your company does not qualify. That represents two risks when they only need one: a bet on your company’s success and a separate bet on HMRC’s eligibility judgment. Sophisticated investors do not accept avoidable risk.
From the founder’s perspective, advance assurance also serves another critical function: it forces you to confront your eligibility before you have investor conversations. Better to discover a disqualifying issue at the application stage than after you have made commitments to investors.
When to Apply
Timing matters considerably. The right moment to apply is after incorporating but before issuing shares, when your business model is reasonably finalised, and at least three months before you need the money in your account. HMRC can take four to twelve weeks to respond, and more complex cases take longer. Do not leave this to the last minute.
Apply too early and your business model may be too vague for HMRC to assess properly — they will either reject it or request additional information, delaying everything. Apply after you have already issued shares and you have missed the window entirely.
How to Apply: The Step-by-Step Process
There is no single official application form. You submit a letter to HMRC’s Small Company Enterprise Centre (SCEC) requesting advance assurance, accompanied by supporting documentation. Here is what you need to include.
Company documentation. Incorporation documents, confirmation of shareholder structure, and details of any previous EIS or SEIS fundraising.
Your business plan. This is the most critical element of the application and where most submissions fall short. HMRC wants to see that you are a genuine, growth-oriented trading company. Your plan should include market analysis demonstrating real customer demand, a clear explanation of your qualifying trade, a detailed breakdown of how you will spend the investment (showing 80% or more on qualifying activities), evidence that the risk-to-capital condition is met, competitive analysis, financial projections for at least three years, and management team credentials.
The document does not need to be exhaustive — fifteen to twenty pages with proper financial modelling is typically sufficient. But it must be substantive. A vague two-page summary will not persuade HMRC that you understand your own business or that it genuinely qualifies.
Confirmation letter. This should state the amount you intend to raise, the scheme you are applying for, confirmation that you meet the eligibility criteria, a description of your qualifying trade, and an explanation of how the risk-to-capital condition is satisfied.
What HMRC Assesses
HMRC’s review focuses on five areas.
Qualifying trade. Is your primary activity a qualifying trade? They are looking for evidence that you are not primarily engaged in excluded activities and that the trade is genuinely commercial.
Age and size. Straightforward threshold verification — you either meet them or you do not.
Risk-to-capital condition. The most subjective element. They want to see that the investment carries meaningful risk, that the business has genuine growth objectives, and that you are not creating a low-risk fee extraction or asset-backed lending vehicle.
Use of funds. How will the money be deployed? They are checking that 80% or more will go to qualifying activities within two years, and that you are not planning to use it to buy property for investment, repay director loans, or otherwise circumvent the scheme’s intent.
UK permanence. Do you have a genuine UK business establishment? Not just a registered address — a real operational presence.
Timeline Expectations
In our experience with client applications:
- 4 to 6 weeks: Fastest turnaround for straightforward, well-prepared applications
- 8 to 10 weeks: Typical timeline for a complete submission
- 12 to 16 weeks: If HMRC requests clarification or additional information
- Rejection notice: Usually comes within 6 to 8 weeks if the application is going to be refused
You can significantly reduce timeline risk by submitting a complete, well-documented application the first time. Incomplete applications or vague business plans almost always result in an information request that adds weeks to the process.
Why Applications Get Rejected — And How to Avoid It
Based on our client work, I estimate that well-prepared applications have an approval rate of around 75-80%. The gap between prepared and unprepared applications is significant. Common reasons for rejection include:
Excluded trade activities. The most frequent issue. Property development dressed up as property technology, financial services without sufficient genuine value-added activity, and consultancy businesses that are really just personal service companies all commonly fail on this ground.
Insufficient risk-to-capital. Asset-backed lending, where security covers nearly all of the loan value, businesses with guaranteed fee-based income and no meaningful equity upside, and companies acquiring existing profitable operations all tend to fail this test.
Age or asset limits exceeded. This is binary — if you are three years old applying for SEIS, you do not qualify, regardless of how good the application is. Check your eligibility before investing time in the application.
Unclear or non-qualifying use of funds. Plans showing investment going toward property acquisition, director loan repayments, or vague “general working capital” without a breakdown raise significant flags.
Incomplete applications. Missing information, inadequate business plans, or descriptions of activities that do not make the qualifying trade clear enough for an HMRC assessor to make a confident decision.
A Real Rejection and Recovery: Fintech Client
A fintech client came to us after their initial advance assurance application was rejected. HMRC’s concern was that their lending model appeared too low-risk — the loan book was secured against property in a way that suggested investors would not genuinely be at risk of significant capital loss.
We restructured their approach. The business model was repositioned to focus on higher-risk SME lending to underserved borrowers. We demonstrated a clear risk profile in the loan portfolio, provided detailed evidence of the technology development component as the qualifying trade, and showed genuine growth objectives, including geographic expansion and new product development.
The second application was approved in seven weeks. The lesson: HMRC’s concerns are usually specific and addressable. The key is to engage with their actual objection rather than simply resubmitting the same application with minor changes.
The Risk-to-Capital Condition: The Test Most Founders Underestimate
Introduced in 2018, the risk-to-capital condition fundamentally changed the EIS and SEIS landscape. It was designed to prevent low-risk, lifestyle businesses from accessing schemes intended for genuinely high-risk growth ventures.
Your company must demonstrate two things. First, the investment carries a significant risk that investors will lose more than their capital invested. Second, the company aims to grow and develop its trade in the long term. Both must be present — meeting just one is not sufficient.
What Evidence HMRC Looks For
Market risk. Evidence that you are operating in competitive, evolving markets where customer acquisition is genuinely challenging, where established players create real competitive pressure, and where technology or product development carries meaningful uncertainty.
Financial risk. You should be pre-profit or in early-revenue, with uncertain revenue projections and a capital-intensive model in which the path to profitability requires successful execution rather than just time.
Execution risk. Reliance on key team members, complex operational requirements, regulatory hurdles, or scaling challenges that create genuine uncertainty about outcomes.
Growth objectives. Clear expansion plans beyond current operations — new product development, geographic expansion, market share growth targets, job creation plans. The scheme is for growing companies, not for maintaining existing operations.
What Reliably Fails the Risk-to-Capital Test
- Asset-backed lending where security covers 90% or more of the loan value
- Fee-based businesses with guaranteed long-term contracts and no meaningful equity upside
- Businesses acquiring established, profitable operations with predictable cash flows
- Franchise models with proven unit economics and territory protection
If your business model has any of these characteristics, take specialist advice before applying. It does not necessarily mean you cannot qualify, but it means the application requires careful structuring.
Post-Investment Compliance: What Happens After the Money Arrives
Getting the initial qualification right is one thing. Maintaining it over the following three years is another. This is an area where I see founders repeatedly caught out: they focus heavily on the advance assurance process and then lose track of their ongoing obligations.
The Compliance Statement Process
Once shares are issued to investors, you have two months to submit your compliance statement to HMRC. For SEIS, this is Form SEIS1; for EIS, it is Form EIS1. These forms confirm that the share issues met all qualifying conditions and provide details of how funds will be used and information about each investor.
HMRC typically reviews submissions within two to four weeks and either issues certificates (SEIS3 or EIS3) or requests additional information. Distribute certificates to investors immediately upon receipt — they need these to claim their tax relief. Investors can claim relief in the tax year of their investment or the preceding tax year, giving them useful flexibility to optimise their tax position.
Your Ongoing Obligations for Three Years
Spend the money correctly. Track expenditure carefully against qualifying and non-qualifying activities. Ensure 80% or more goes to qualifying uses within 24 months and maintain detailed records. Poor record-keeping is one of the most common issues we see in HMRC post-investment reviews.
Maintain eligibility. Continue carrying on the qualifying trade. Do not exceed size limits on employees or assets. Do not undertake disqualifying arrangements. Do not repay the investment.
Events That Trigger Loss of Relief
If certain events occur within three years of investment, investors must repay the income tax relief they claimed. These disqualifying events include the company ceasing to carry on the qualifying trade, becoming a subsidiary of another company, issuing shares with preferential rights not permitted under the schemes, repaying investors’ capital, or acquiring another company (with some exceptions). On the investor side, selling shares before three years, taking a paid director role, or acquiring more than 30% of the company also triggers loss of relief.
The consequences are significant: investors must repay the income tax relief to HMRC, the CGT exemption is lost on future disposals, and loss relief is adjusted when claimed. For this reason, founders need to understand these rules thoroughly before any corporate restructuring, acquisition, or significant changes to the business model.
Common Post-Investment Mistakes to Avoid
Property-related issues. Buying or leasing property that is used for investment rather than the qualifying trade is one of the most common disqualifying activities. Even if this is not your intention, if your company’s property holdings start to resemble an investment portfolio, HMRC may look closely.
Director remuneration. Paying directors at rates significantly above market can be interpreted as disguised capital repayment. Ensure director salaries are commercially justifiable.
Acquisition activity. Acquiring other companies is possible under EIS and SEIS, but must be structured very carefully. If not handled correctly, it can trigger disqualification. Always take specialist advice before any acquisition.
Losing the qualifying trade. If your business pivots significantly and the new activity does not qualify for relief, you may inadvertently jeopardise existing investors’ relief. This is particularly relevant for early-stage companies that undergo significant evolution in their first two to three years.
Why EIS and SEIS Materially Improve Your Fundraising Outcomes
The data from our client engagements is consistent. Investor conversion rates are 35 to 40% higher for EIS- or SEIS-qualified companies than for unqualified companies at similar stages. The average time to close a round is six to eight weeks faster with advance assurance in place. Average ticket sizes are approximately 25% larger per investor because the risk-adjusted return is more attractive.
The mechanism is straightforward. Put yourself in an angel investor’s position. Two otherwise identical opportunities: one where you invest £100,000 with full exposure to the company’s risk, and one where you invest £100,000, claim £50,000 back immediately through income tax relief, and your effective risk is £50,000. Even if the companies were identical, the second option delivers nearly double the return on your actual capital at risk. For the investor, this is a materially different proposition.
The practical implication for founders: the cost of securing advance assurance — which primarily involves time and a well-prepared business plan — is almost always justified by faster closes and better round economics. The question is not really whether to do it. The question is whether you are ready to do it well.
How SGI Supports EIS and SEIS Applications
At SGI, we have supported over 150 EIS and SEIS advance assurance applications. Our involvement typically spans three areas.
First, business plan preparation. The business plan submitted with an advance assurance application needs to satisfy HMRC’s assessors, not just investors. These are different audiences with different questions. We structure plans that address both, which significantly improves approval rates and response times.
Second, application structuring. Particularly for companies with complex business models, multiple revenue streams, or elements of excluded activities, how you characterise your trade and present your use of funds matters considerably. We have restructured a number of applications that were initially rejected and secured approvals on the second attempt.
Third, ongoing compliance. We work with clients beyond the advance assurance stage to ensure they maintain eligibility throughout the compliance period — tracking expenditure, advising on corporate decisions that could affect scheme status, and helping prepare the compliance statements that must be submitted after share issuance.
If you are considering raising investment and want to understand whether EIS or SEIS applies to your business, or if you have already started the process and want a review of your application, I am happy to have that conversation.
Ready to Use EIS or SEIS to Raise Faster?
Book a free consultation with SGI Consultants to assess your EIS and SEIS eligibility and get a clear plan for securing advance assurance and structuring your fundraise.
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Frequently Asked Questions
Is advance assurance legally required to use EIS or SEIS?
No — it is not a legal requirement. However, in practice, most experienced UK angel investors will not invest without it. They need confidence that the tax reliefs they are expecting will actually materialise. If you are raising funds from friends and family who understand the risk, you may be able to proceed without advance assurance. For any serious institutional or professional angel fundraise, treat it as essential.
How long does the advance assurance process take?
Straightforward applications typically take four to ten weeks. Complex cases, or those in which HMRC requests additional information, can take 12 to 16 weeks. Budget for at least 3 months between application and when you need the money in your account. Do not begin investor conversations with a commitment to close by a specific date until advance assurance is secured.
Can I apply for advance assurance before I have investors lined up?
Yes, and in most cases this is the right approach. Investors are more likely to engage seriously when you already have advance assurance confirmed — it removes a significant uncertainty from their decision. Some founders apply simultaneously with beginning investor conversations, but this carries the risk of having to revisit terms if advance assurance throws up unexpected eligibility issues.
What happens if I lose EIS or SEIS status after investment?
Investors must repay the income tax relief they claimed, lose the CGT exemption on any future disposal of shares, and have loss relief adjusted where applicable. This is financially serious for investors and can severely damage your relationship with them and your reputation in the funding community. Prevention through proper compliance management is significantly preferable to remediation.
Can I use EIS or SEIS alongside other funding sources?
Yes, with some caveats. You can use EIS and SEIS alongside grant funding, bank lending, and other sources. However, certain grant schemes have restrictions on combining with EIS or SEIS — specifically, if you have received de minimis state aid above certain thresholds, this may affect your eligibility. Check the specific rules for any grant funding you receive.
What is a knowledge-intensive company, and does it affect my eligibility?
Knowledge-intensive companies (KICs) are defined by HMRC as companies that either spend at least 15% of operating costs on R&D or innovation, or spend at least 10% across three of the previous five years. KICs benefit from higher EIS limits — up to £10 million lifetime, £20 million total including other schemes, and the seven-year age limit extends to ten years. If your business is R&D-intensive, it is worth checking whether you qualify as a KIC before structuring your fundraise.
What is the difference between SEIS3/EIS3 and SEIS1/EIS1 forms?
SEIS1 and EIS1 are the compliance statements you submit to HMRC after issuing shares. SEIS3 and EIS3 are the certificates HMRC issues in return, which investors use to claim their tax relief. As a founder, you need to submit the SEIS1 or EIS1 within two months of the share issue, and promptly distribute the SEIS3 or EIS3 certificates to investors upon receipt.
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Kurt Graver is the founder and CEO of SGI Consultants, a business consultancy that has helped over 2,000 entrepreneurs establish successful startups using systematic business development methodologies. An accountant with an MBA and 25 years of commerce and consultancy experience, Kurt specialises in strategic planning, market analysis, and sustainable business growth