EIS is sold on a generous-looking number: 30% income tax relief on what you put in, with loss relief and capital gains breaks layered on top. For a higher-rate or additional-rate taxpayer staring at a £10,000 cheque, the obvious question follows - is the relief real, or is it the sweetener on a bet you'd never otherwise take? The honest answer has two halves, and most write-ups only give you the flattering one.
The reliefs are genuine and they do stack. They also sit on top of one of the riskier things you can do with money: backing single, unlisted companies that can fail entirely. This piece lays out how the maths works for a 40% or 45% payer, then the catches that decide whether it earns its place. It's a set of factors to weigh, not a steer.
Relief changes the cost of a bet. It doesn't change whether the bet pays off.
Why higher-rate taxpayers keep asking this
The pull is simple. If you pay tax at 40% or 45%, a 30% income tax rebate on the way in feels like getting a third of your stake back before the company has done anything. Add the prospect of a tax-free gain and a cushion if it all goes wrong, and the headline starts to look like a one-way bet. That's the impression the relief creates, and it's worth examining rather than swallowing.
The reason the question lands harder for higher earners is mechanical: the relief is capped by your income tax bill. You can't reclaim more income tax than you actually owe in the year. Someone with a large, dependable tax liability can use the full 30%; someone with little tax to pay can't, no matter how much they invest. So the relief is structurally more useful the bigger your bill - which is exactly why a 40% or 45% payer is the one running the numbers. HMRC sets out how the relief works in its guidance for investors.
How the reliefs stack for a 40% or 45% payer
EIS isn't one relief, it's four that work together. Taken in order, here's how they fit:
- 30% income tax relief on up to £1,000,000 invested in a tax year, claimed against the income tax you owe. On £10,000 in, that's £3,000 back.
- Loss relief if the company fails. You set the loss - your net cost after the income tax relief - against your income or gains, at your marginal rate.
- Capital gains deferral, which postpones tax on a separate gain you reinvest into EIS shares.
- A CGT-free gain on the EIS shares themselves, if you hold for three years or more and the income tax relief was given and not withdrawn.
The first two are what shape the downside. The worked figures in the table above show the idea: put in £10,000, take £3,000 of income tax relief, and £7,000 is your money genuinely at risk. If the company then fails, loss relief on that £7,000 at a 45% rate is worth roughly £3,150 - leaving an illustrative net loss of about £3,850 on the original £10,000. Treat that as a simplified illustration only; the real figures depend on your tax position, the rate you can use and whether the company qualifies throughout.
The catches the headline hides
The effective-cost arithmetic is true and it's also incomplete. Three things sit under it that the 30% number never mentions.
First, the relief is capped by your income tax bill. The illustration assumes you have enough liability to absorb all of it. If you don't, the 30% shrinks to whatever you can actually offset, and the maths changes underneath you.
Second, the money is locked up and illiquid. You have to hold the shares for at least three years to keep the income tax relief and reach the CGT-free position, and unlisted shares have no ready market - there's often no buyer when you want one, and the real hold can run well beyond three years. Money you might need belongs nowhere near this.
Third, and most bluntly: companies can fail entirely. Early-stage businesses are among the most likely investments to lose the lot, and loss relief softens that outcome rather than preventing it. The relief lowers the cost of being wrong; it does nothing to make the company succeed. A cushioned loss is still a loss.
The factors that actually decide it
Rather than a verdict, here are the factors that move the decision - things to weigh, not a steer either way:
- Your tax position. The relief is only worth its full headline value if your income tax bill is large and dependable enough to absorb it. The bigger and steadier your liability, the more the 30% is genuinely worth to you.
- Your appetite for illiquid risk. A three-year-plus hold in shares you can't easily sell is a real constraint, not a formality. It only suits money you can afford to lock away and lose.
- Whether you'd make the investment without the relief. This is the honest test. If the company only looks worthwhile once the tax break is bolted on, the relief is doing the persuading - and relief is not a return.
- How the loss-relief cushion sits with you. It lowers the after-tax cost of failure, which matters on bets you expect some of to fail. It changes the downside, not the odds.
A note on what this isn't
One thing this piece is not: a nudge towards or away from EIS for your situation. The reliefs are real, but they hang on your personal tax position and on rules that shift with each Budget. The relief is capped by what you owe, the hold is long and illiquid, and the companies behind the scheme are among the most likely investments you can make to lose everything - tax relief lowers that risk, it never removes it. Confirm the current position in HMRC's guidance on the venture capital schemes, and take FCA-regulated advice before you commit capital.
Frequently asked questions
How much tax relief do you get on EIS?
EIS gives 30% income tax relief on up to £1,000,000 invested in a tax year. You claim it against the income tax you owe, and you cannot reclaim more tax than you actually owe in the year. On top of the income tax relief there's loss relief if the company fails, capital gains deferral on a separate gain you reinvest, and a gain on the EIS shares that is CGT-free if you hold for three years or more with relief claimed.
What is the effective cost of an EIS investment?
As a simplified illustration: on £10,000 invested, 30% income tax relief gives back £3,000, so £7,000 is your money at risk. If the company then fails, loss relief on that £7,000 at a 45% rate is worth roughly £3,150, leaving an illustrative net loss of about £3,850 on the original £10,000. These figures are illustrative only and vary with your tax position, the rate you can use and whether the company qualifies throughout. This is general information, not advice.
Is EIS only worth it for higher-rate taxpayers?
The income tax relief is capped by the income tax you actually owe, so it's structurally more useful to people with a large, dependable tax bill. A 40% or 45% taxpayer can usually absorb the full 30%; someone with little income tax to pay cannot, however much they invest. That doesn't make it right for any individual - it just explains why higher earners are the ones the maths tends to suit. The risk is the same for everyone: the companies can fail entirely.
How long do you have to hold EIS shares?
At least three years to keep the income tax relief and to reach the position where a gain on the shares is free of capital gains tax. Sell before three years and the income tax relief is withdrawn. In practice the hold is often longer, because unlisted shares are illiquid and there may be no buyer when you want one - so EIS suits money you can afford to lock away.
Does EIS relief mean I can't lose money?
No. The reliefs lower the cost of a loss, they don't remove the risk. Early-stage companies are among the most likely investments to fail entirely, and loss relief only cushions that outcome - it doesn't prevent it. Treat any tax relief as a reduction in downside, not a return. This is general information, not financial advice; reliefs depend on your circumstances and change with each Budget, so confirm the current rules at GOV.UK and take FCA-regulated advice before committing capital.