What is SEIS?
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The Seed Enterprise Investment Scheme could be just what you need to attract investors in the early days.
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Written by Guy Kaufman
Startup Lead at Vestd
Page last updated: 4 February 2025
SEIS can help you secure investment by offering irresistible tax incentives to investors. Interested? Keep reading!
Contents
What is the Seed Enterprise Investment Scheme (SEIS)?
SEIS is a government-backed initiative designed to help early-stage UK businesses attract investment. By offering generous tax reliefs, SEIS makes investing in startups less risky and more rewarding for investors.
It's the little sister to the Enterprise Investment Scheme (EIS) which is best suited to businesses which are a bit further along.
Launched in 2012, SEIS has already helped over 15,000 businesses secure essential funding. It’s a game-changer for startups, encouraging innovation and growth by connecting them with investors eager to support new ideas.
With continued growth in SEIS investments, particularly in tech and sustainable industries, the scheme has become a core part of the UK’s entrepreneurial ecosystem. And with secondary markets growing in popularity, SEIS investors could see returns sooner.
SEIS: How does it work?
SEIS offers tax incentives to individuals who invest in qualifying startups. In exchange, startups can raise up to a set funding limit, giving them the financial boost they need to grow.
Recent updates to the scheme include increased investment caps and refined eligibility rules. These changes are designed to widen access to funding while protecting investors from undue risk.
SEIS funding limits
Of course, what you really want to know is how much money you could raise with SEIS!
Under SEIS, startups can raise up to £250,000. This is a lifetime limit and businesses must secure these funds within a three-year window. Meanwhile, investors can spread up to £200,000 per tax year across several SEIS-qualified companies.
These limits help ensure that SEIS focuses on early-stage ventures, giving startups a fighting chance to develop their products, test the market, and scale up.
SEIS tax relief for investors
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Income tax relief: Investors can claim 50% of their investment (up to £200,000 per year) as a deduction on their income tax bill.
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Capital gains tax relief: Any gains made on SEIS shares are exempt from CGT, provided the investor held the shares for at least three years.
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Loss relief: If the investment doesn’t pan out, investors can offset the loss against other income or gains.
- CGT reinvestment relief: Gains from other assets can be deferred if reinvested into SEIS-eligible companies (this is subject to a cap of £100k pa.).
You can see why investors love schemes like SEIS! These benefits are designed to reduce the financial risk of investing in startups and encourage more private capital to flow into new ventures.
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SEIS tax relief in action
Loss relief example:
If someone who pays 45% income tax invests £10,000 in your company through SEIS, they’ll immediately receive £5,000 of income tax relief.
If your company folds while they still hold those shares, they’ll also get to claim 45% (£2,250) of their remaining £5,000 of at-risk capital back as tax relief.
So, after the £5,000 of income tax relief and £2,250 of loss relief, a £10,000 SEIS/EIS investment into a business that fails is reduced to a total loss of just £2,750.
Reinvestment relief example:
If an investor sells a property and realises a £100,000 gain, they’d usually have to pay 28% (£28,000) Capital Gains Tax on that profit.
If they invest that £100,000 straight into SEIS/EIS-qualifying shares, the CGT they have to pay on that profit will be halved to £14,000.
These examples are for illustrative purposes only and should not be considered professional advice. If ever in doubt, ask an expert.
SEIS eligibility criteria
While MANY do, not every business qualifies for SEIS. There are restrictions for investors too, but let's start with companies.
To qualify for SEIS, businesses must:
- Be less than three years old.
- Have fewer than 25 full-time employees.
- Have a permanent establishment in the UK.
- Not be controlled by another company.
- Carry out a qualifying trade (see paragraph below).
- Not control a company/subsidiary that isn't a qualifying trade.
- Not be trading on a public stock exchange.
- Not received Venture Capital Trust (VCT) or EIS funding previously.
- And gross assets cannot exceed £350,000.
Qualifying trades:
SEIS covers most industries, but there are exceptions. Trades like banking, insurance, property development, and legal services don’t qualify. See the full list. But even then, it only matters if it accounts for more than 20% of the business' activities.
As for investors:
- They must be a UK taxpayer.
- Investors can’t be employees but can serve as directors.
- Nor can investors have a substantial interest (own more than 30% of the company’s shares or voting rights) before the SEIS investment is made.
- Certain family members of directors or owners are excluded from investing. Disqualified relationships include spouses, civil partners, parents, children, and grandchildren. However, siblings, cousins, and friends are allowed to invest.
Falling foul of these rules could lead to losing tax reliefs and other penalties, which nobody wants.
What SEIS funds can be spent on
There are rules for spending the cash raised through SEIS funding. You must spend the money you raise through SEIS within three years and only on things used to grow your business. For example, you could use the funds for:
- Product development
- Research and development
- Marketing and sales
- Hiring staff
- Purchasing essential equipment
What you can't do is use the funds to get your startup out of trouble, i.e. pay off debts. Neither can the funds be used to acquire another business. So, to stay in your investor's and HMRC's good books, be mindful of your spending.
SEIS vs EIS: What’s the difference?
Put simply, SEIS is for very early-stage startups and EIS is for more established businesses.
SEIS offers a higher rate of tax relief (50%) and is available to companies that are up to three years old (as of April 2023).
EIS, on the other hand, can be used by companies up to seven years old from the date of their first commercial sale, and while the tax relief rate is lower (30%), it applies to raises of up to £5 million per year, with a lifetime limit of £12 million.
If your startup is eligible, there's no reason why you couldn't use both schemes. In fact, this can make your company even more attractive to investors.
But just so you're aware, SEIS has to come first. Companies can't take on EIS funding and then SEIS funding after as it's against the rules.
How to get SEIS funding
Applying for SEIS funding involves more than just ticking boxes. Here's a breakdown of the five key steps:
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Check your eligibility: Make sure your business meets the SEIS criteria. Being clear about your eligibility can save time and reduce the chance of your application being rejected.
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Have a potential investor ready: HMRC expects that businesses applying for advance assurance can demonstrate some degree of potential investor interest. This shows that the application is not purely speculative.
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Prepare strong documentation: Create a detailed business plan, financial projections, and supporting evidence. Investors and HMRC will want to see that you have a well-thought-out strategy for growth.
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Apply for advance assurance: This pre-approval from HMRC reassures investors that your company is likely to qualify for SEIS. While not mandatory, advance assurance can give you a competitive edge.
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Issue SEIS shares: Once you’ve secured funding, submit the necessary forms, like the SEIS compliance statement, to HMRC. You can apply for advance assurance, issue SEIS shares to investors and tick off all SEIS admin on Vestd!
What is SEIS advance assurance?
SEIS advance assurance is a formal confirmation from HMRC that your business is likely to qualify for SEIS. While not essential, it helps speed up the process and gives investors the confidence that they'll benefit from the scheme's brilliant tax benefits.
Applications can take a few weeks to process, so it’s best to start early. Vestd's founder-friendly workflow will take you through it step-by-step.
Get investment-ready with Vestd
If you're gearing up for investment, SEIS is a no-brainer. Secure the cash injection your startup needs, and in return, give investors generous tax breaks when they buy your shares. It's a win-win!
Apply for advance assurance and manage your entire funding round with InVestd Raise. With a wealth of tools at your fingertips plus templates and expert support, we've simplified fundraising for good.
Information correct at the time of publishing. Our team, content and app can help you make informed decisions. However, any guidance and support should not be considered as 'legal, tax or financial advice.'
Frequently asked questions
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Which trades are disqualified from SEIS?
Excluded trades:
- Coal or steel production
- Farming or market gardening
- Leasing activities
- Legal or financial services
- Property development
- Running a hotel
- Running a nursing home
- Generation of energy
- Production of gas or other fuel
- Exporting electricity
- Banking, insurance, debt or financing services
- Dealing in land or commodities
However, if less than 20% of your overall business activities fall under one of these brackets, your company may still be eligible for SEIS. Learn more.
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What's the risk-to-capital condition?
The risk-to-capital condition is an HMRC test designed to check if a business is genuinely using SEIS/EIS funding to grow. To qualify, businesses must:
- Demonstrate clear growth potential
- Prove to be a genuine risk to investors
This is to make sure that the investment is for genuine commercial purposes and not an attempt at tax avoidance.
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What is the SEIS tax relief?
Investors can claim up to 50% income tax relief on their SEIS investments. Any gains made on SEIS shares are exempt from CGT, provided the investor held the shares for at least three years.
Investors may also be able to claim CGT reinvestment relief and loss relief. Learn more.
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Can SEIS tax relief be revoked?
Even if a business initially qualifies, SEIS tax relief can be revoked within three years of issuing shares if disqualifying circumstances arise. Read these possible scenarios.
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What's the alternative to SEIS?
If your company has been trading for more than three years, check out the Enterprise Investment Scheme (EIS).
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Can I use SEIS and EIS?
If you fit the criteria for both, there's no reason why you can't go for SEIS funding first and then EIS funding later down the line. But if you do plan to use both, SEIS has to come first. You can't issue EIS shares and then issue SEIS shares after.
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