The Enterprise Investment Scheme (EIS) is one of the most generous tax incentives available to UK investors, offering 30% income tax relief on investments of up to GBP 1,000,000 per year (GBP 2,000,000 for Knowledge-Intensive Companies), full CGT exemption after three years, CGT deferral relief, and loss relief if an investment fails. This guide explains every aspect of EIS for 2026/27 -- from eligibility rules and holding periods to how EIS interacts with SEIS and Business Asset Disposal Relief.
EIS was introduced in 1994 to encourage individuals to invest in small, higher-risk UK trading companies that might otherwise struggle to raise growth capital. In exchange for accepting the risks of investing in early-stage businesses, investors receive a package of tax reliefs that can dramatically improve the after-tax return -- or reduce the after-tax cost of a loss.
The scheme is administered by HMRC and requires the investing company to obtain advance assurance (or retrospective approval) from HMRC confirming that it meets the qualifying conditions. Once approved, the company issues investors with an EIS3 certificate, which the investor uses to claim the reliefs on their Self Assessment tax return.
EIS sits within a family of venture-stage investment incentives that also includes the Seed Enterprise Investment Scheme (SEIS) for very early companies and Venture Capital Trusts (VCTs) for those who prefer a pooled fund approach. EIS is the most widely used of these schemes and in recent years has channelled hundreds of millions of pounds annually into UK start-ups and scale-ups.
Importantly, EIS is not a guaranteed return -- the tax reliefs reduce the downside, but the underlying investment is in unlisted shares that carry significant risk. Investors should treat EIS as a long-term, illiquid commitment and take independent financial advice before investing.
The core EIS benefit is 30% income tax relief on the amount invested. The maximum annual investment for standard EIS is GBP 1,000,000, giving maximum income tax relief of GBP 300,000. For investments in Knowledge-Intensive Companies (KICs), the annual limit rises to GBP 2,000,000, provided the amount above GBP 1,000,000 is entirely in KICs -- giving potential relief of up to GBP 600,000 per tax year.
The relief is applied as a direct reduction of your income tax liability for the year. This means you must actually owe at least as much income tax as the relief you are claiming. For example, if you invest GBP 100,000 and are entitled to GBP 30,000 of EIS relief, but your total income tax bill for the year is only GBP 20,000, you can only claim GBP 20,000 of relief -- the remaining GBP 10,000 is wasted (you cannot carry it forward, though you can carry back the investment itself to the previous tax year).
EIS carry-back allows you to treat all or part of a 2026/27 EIS investment as if it were made in 2025/26, giving you relief against your previous year tax bill. This is useful if you have already filed your 2025/26 return, as you can amend it to include the EIS carry-back claim. The carry-back amount is still subject to the GBP 1,000,000 annual limit (or GBP 2,000,000 for KICs) in the year being carried back to.
To claim income tax relief you need the EIS3 certificate from the company (or the EIS5 certificate from a fund manager if investing via an EIS fund). The company can only issue EIS3 certificates after HMRC confirms it qualifies -- this can sometimes take several months after the investment is made. Your tax return claim deadline is five years after the 31 January following the tax year of investment.
Any gain on the disposal of EIS shares is completely exempt from Capital Gains Tax, provided two conditions are met: you held the shares for at least three years (from date of issue or date trading commenced, whichever is later), and the income tax relief on those shares was not withdrawn or reduced. There is no upper limit on the size of the exempt gain -- whether the gain is GBP 10,000 or GBP 10 million, the CGT exemption applies in full.
This makes EIS particularly powerful for investors who expect significant capital appreciation. At the standard CGT rate of 24% (for higher and additional rate taxpayers on share disposals from 2024/25 onwards), a GBP 500,000 gain on EIS shares saves GBP 120,000 in CGT compared with a non-EIS investment. Combined with the 30% income tax relief on the original investment, the total tax saving on a successful EIS exit can be very substantial.
CGT deferral relief is a separate and additional benefit. It allows you to defer a capital gain from any asset (for example, the sale of a property or a business) by investing the proceeds into EIS shares within the window running from three years before to one year after the original disposal. The deferred gain is not cancelled -- it is held over until you dispose of the EIS shares. At that point the gain is brought back into charge and taxed at the CGT rates then prevailing.
Unlike the income tax relief and CGT exemption, CGT deferral relief is available even if the investor is non-UK resident at the time of the deferring investment, and even if the investor has exceeded their income tax relief cap. There is no upper limit on the amount of gain that can be deferred. This makes CGT deferral a powerful planning tool for investors facing large one-off capital gains from property or business sales.
If an EIS investment falls in value or the company becomes insolvent, investors can claim loss relief on the net loss (the loss after deducting the income tax relief already received). The net loss can be set off against either capital gains (as a capital loss) or income (as an income loss relief claim). Income loss relief is generally more valuable for higher-rate taxpayers because it is applied at marginal income tax rates rather than CGT rates.
To illustrate: suppose a higher-rate taxpayer invests GBP 100,000 in EIS shares, receives GBP 30,000 of income tax relief (net cost GBP 70,000), and the company subsequently fails. The allowable loss is GBP 70,000 (the net cost). Claiming income loss relief at 40% gives a further GBP 28,000 tax saving. The total tax recovered (GBP 30,000 + GBP 28,000 = GBP 58,000) means the effective maximum loss on a total failure is GBP 42,000 out of a GBP 100,000 investment -- a downside of 42p in the pound for a higher-rate taxpayer.
Loss relief claims must be made within four years of the end of the tax year in which the loss crystallised (for income loss relief) or within four years for capital loss claims. Keep records of your EIS3 certificates, subscription dates, disposal dates, and disposal proceeds carefully, as HMRC may ask to see these when processing loss relief claims.
It is worth noting that loss relief and the CGT exemption cannot both apply to the same disposal in the same direction -- if you sell at a gain, the gain is exempt; if you sell at a loss, you can claim loss relief on the net loss. The combination means EIS investors have asymmetric exposure: gains are tax-free, losses are tax-cushioned.
For an investment to qualify for EIS, the company must satisfy a range of conditions at the time of the share issue and for the following three years. The key rules for 2026/27 are as follows.
The company must be unquoted (not listed on a recognised stock exchange, though AIM shares can qualify since AIM is not a recognised exchange for EIS purposes). It must be carrying out a qualifying trade -- excluded activities include property development, financial instruments dealing, leasing, farming, hotels, care homes, energy generation, and businesses running licensed premises such as pubs. The company must be UK-incorporated or have a permanent UK establishment.
Gross assets must not exceed GBP 15 million immediately before the EIS investment and GBP 16 million immediately after. The company must have fewer than 250 full-time equivalent employees at the time of the share issue (500 for KICs). The company must not have been trading for more than seven years from its first commercial sale before the EIS investment (ten years for KICs). These time limits are designed to ensure EIS money goes to genuinely early-stage businesses rather than established companies.
There are also investor-level conditions. You cannot be connected with the company at the time of investment -- broadly, you must not hold more than 30% of the company, must not be an employee or director of the company (though unpaid directors can qualify in limited circumstances), and must not be a business partner of the company. Family members of connected persons are also treated as connected. These connection rules exist to prevent EIS being used as a tax shelter for owner-managed businesses rather than as an incentive for genuinely arm's-length investment.
Companies can raise up to GBP 5 million per year through a combination of EIS, SEIS, and other venture capital schemes (GBP 10 million per year for KICs), and up to GBP 12 million in total over their lifetime (GBP 20 million for KICs). These are company-level limits, separate from the individual investor limits described above.
A Knowledge-Intensive Company is defined by reference to its R&D and innovation spending. A company qualifies as a KIC if it meets either the 15% test (at least 15% of operating costs were spent on R&D or innovation in one of the previous three years) or the 10% test (at least 10% of operating costs in each of the previous three years). The company must also employ highly skilled workers -- at least 20% of its workforce must hold a relevant higher education qualification, or at least 10% must hold a Masters or doctoral qualification.
The KIC designation has three major investor benefits. First, the annual EIS investment limit doubles to GBP 2,000,000 per individual (provided the excess above GBP 1,000,000 goes entirely into KICs). Second, the KIC can raise up to GBP 10 million per year through venture capital schemes rather than the standard GBP 5 million. Third, the age limit for the company extends from seven years to ten years from first commercial sale, meaning more mature innovative companies can still raise EIS money.
Many deep-tech, biotech, and software scale-ups qualify as KICs. When evaluating an EIS opportunity, it is worth checking whether the company has obtained KIC status, both because it indicates a higher proportion of R&D activity (which may correlate with growth potential) and because it expands your own investment capacity.
SEIS (Seed Enterprise Investment Scheme) and EIS target different stages of a company life cycle and offer different relief rates. SEIS is designed for the very earliest stage -- companies with gross assets under GBP 350,000, fewer than 25 employees, and trading for under three years. SEIS offers 50% income tax relief on investments up to GBP 200,000 per individual per year, plus a 50% CGT reinvestment relief on any reinvested gains.
EIS targets companies that have passed the seed stage but are still pre-profit or early in their growth phase -- gross assets under GBP 15 million, fewer than 250 employees. The relief rate is lower at 30%, but the investment limits are much higher (up to GBP 1,000,000 or GBP 2,000,000 for KICs). A single company can raise SEIS money first (up to GBP 250,000 per company) and then go on to raise EIS money, provided the SEIS investors have held their shares for at least three years before the company issues EIS shares.
Investors can hold both SEIS and EIS investments simultaneously -- they are subject to separate annual limits. Many angel investors use SEIS for early bets (accepting higher risk in exchange for 50% relief) and EIS for follow-on rounds in companies they already know and have greater confidence in. Both schemes offer the same CGT exemption after three years and the same loss relief mechanism.
VCTs (Venture Capital Trusts) offer 30% income tax relief like EIS but are structured as listed investment companies, giving greater liquidity. However, VCT dividends are tax-free and VCTs are subject to their own rules around how they invest. EIS gives you direct exposure to individual companies, which may offer higher upside but with less diversification than a VCT.
The process for claiming EIS reliefs begins with the company. Once HMRC confirms the company qualifies (either via advance assurance or retrospective review), the company issues each investor with an EIS3 certificate showing the investment amount, date of issue, and the HMRC reference number. If you invest via an EIS fund rather than directly, the fund manager will send you an EIS5 certificate covering your proportionate share of the underlying investments.
On your Self Assessment tax return, you enter EIS income tax relief in the Additional Information pages. You will need the investment date, the amount subscribed, and the HMRC EIS reference from your EIS3 certificate. For carry-back claims, you specify which year you want the relief attributed to. Keep your EIS3 certificates safe -- you do not send them to HMRC with your return, but HMRC may ask for them during a compliance check.
CGT deferral relief is also claimed on the Self Assessment return, in the capital gains section. You report the original disposal, the gain, and the amount being deferred into EIS. Loss relief on failed EIS investments is claimed either as a capital loss (in the capital gains section) or as an income loss (in the losses section of the Additional Information pages). The deadline for income loss relief claims is four years after the end of the tax year in which the loss crystallised.
It is strongly advisable to keep detailed records of every EIS investment: the subscription agreement, the share certificate, the EIS3 certificate, and records of any disposals. HMRC has up to four years (or 20 years in cases of deliberate non-disclosure) to open an enquiry into your tax return, so records need to be retained for a long time after the investment is fully realised.
