EIS and SEIS: what investors need to understand

The Enterprise Investment Scheme (EIS) and Seed Enterprise Investment Scheme (SEIS) provide some of the most generous tax reliefs available to UK investors, designed to encourage capital into early-stage, higher-risk companies. Between them, they offer income tax relief, capital gains tax relief, and loss protection - but the reliefs work differently depending on the scheme, and the conditions attached to them matter.

This article sets out what investors need to understand before making an EIS or SEIS investment.

The reliefs, scheme by scheme

The EIS gives individual investors 30% income tax relief on investments into qualifying companies, up to an annual limit of £1 million (rising to £2 million where the amount above £1 million goes into knowledge-intensive companies - broadly, companies whose value comes primarily from R&D, IP, or specialist technical expertise). Relief can be carried back to the previous tax year if that suits an investor's planning.

The SEIS targets smaller, earlier-stage companies and is more generous still: 50% income tax relief, up to an annual limit of £200,000. As with EIS, this can be carried back to the previous tax year. 

Beyond income tax relief: the full picture

Income tax relief is usually the headline, but it's one of several reliefs available, and together they materially change the risk/return profile of an early-stage investment.

Capital gains tax exemption. Provided income tax relief was claimed and not later withdrawn, and the shares are held for at least three years, any gain made on disposal of EIS or SEIS shares is entirely exempt from CGT.

Capital gains tax deferral (EIS). If an investor has a chargeable gain from selling any other asset - property, other shares, a business - that gain can be deferred by reinvesting it into EIS-qualifying shares. The gain doesn't disappear; it comes back into charge later, typically when the EIS shares are eventually sold. The reinvestment must happen within a window of one year before to three years after the original gain arose.

Capital gains tax reinvestment relief (SEIS). SEIS works slightly differently: an investor can treat 50% of a reinvested gain as exempt from CGT (capped at £100,000), rather than simply deferring it.

Loss relief. If a company fails, an investor can offset the loss - net of any income tax relief already claimed - against either income tax or capital gains tax, whichever is more valuable to them. This is arguably the most under appreciated of the reliefs, because it directly softens the downside case that early-stage investors most worry about.

What investors need to have in place to qualify

The reliefs are generous, but they come with conditions on the investor side, not just the company side:

• Connection test. Investors (and close associates - broadly, spouses, parents, children, and business partners) must not be “connected” to the company. This generally rules out anyone who has been an employee or paid director, though an unpaid non-executive role is usually permitted, and SEIS treats director involvement more flexibly than EIS.

• Maximum stake. An investor and their associates cannot hold more than 30% of the company.

• Genuine risk. Shares must be full-risk ordinary shares with no arrangements to protect the investor's capital or guarantee an exit - schemes designed purely to generate tax relief without genuine investment risk will not qualify.

• Holding period. Shares must generally be held for at least three years, or income tax relief (and the CGT exemption) can be clawed back.

Companies raising EIS or SEIS funding will typically hold Advance Assurance from HMRC before a raise - confirmation in principle that the share issue is likely to meet the scheme's conditions. It's a useful signal, but it isn't a guarantee of relief for any individual investor, since the investor-side conditions above still have to be met independently.

A practical example

Consider an investor putting £50,000 into an EIS-qualifying company. Income tax relief of 30% reduces their tax bill by £15,000 in the year of investment, bringing the effective cost down to £35,000.

If the company performs well and the shares are eventually sold at a gain after the three-year holding period, that gain is entirely free of CGT.

If the company fails instead, the investor can offset the £35,000 net loss against income tax or capital gains - for a higher-rate taxpayer, this could recover a further £15,750, reducing the effective loss to around £19,250 on the original £50,000.

This is an illustrative example only and does not represent any specific investment or outcome. Actual relief depends on an investor's individual tax position and is not guaranteed.

The trade-off to keep in view

None of this changes the fact that EIS and SEIS investments are inherently high-risk. These are unlisted, illiquid shares in early-stage companies, and a meaningful proportion of such companies do not succeed. The tax reliefs exist precisely because the underlying risk is real - they're a government-designed offset, not a guarantee of return, and investors should size any position accordingly within a diversified portfolio.

This article is for general information only and does not constitute financial, tax, or legal advice. Tax treatment depends on individual circumstances and current legislation, both of which can change. Figures are correct as at the date of publication and should be independently verified via GOV.UK, or with a qualified adviser, before being relied upon.