Understanding the Average Equity for UK Startup Employees: A Comprehensive Guide

Equity is a standard part of the package at UK startups and scale-ups, and one of the least well understood. Employees are frequently offered a percentage without a clear sense of what it might be worth, when they can realise it, or what tax will apply.

This guide covers how equity is typically structured in UK companies, what allocations look like by stage and role, how EMI options work, and — the part most often got wrong — the current tax treatment.

How UK Startup Equity Is Structured

Share classes

UK companies issue ordinary shares and, where investors are involved, preference shares. Employees almost always receive ordinary shares or options over them. Preference shares typically carry a liquidation preference — the right to be repaid first on an exit — which matters considerably to what ordinary shareholders actually receive.

US material refers to “common stock” and “preferred stock”. These are the same concepts under different names; the UK terms are ordinary and preference shares.

Options rather than shares

Most UK startup employees receive share options rather than shares. An option is the right to buy shares at a fixed price (the exercise or strike price) at a future point. Options are used because they create no tax charge on grant and no cost to the employee until exercised — and because holding actual shares from day one creates complications for both sides.

Vesting and cliffs

The standard UK arrangement is four-year vesting with a one-year cliff: nothing vests in the first twelve months, then 25% vests at the one-year point, with the remainder vesting monthly or quarterly over the following three years. Leave before the cliff and you typically receive nothing.

Leaver provisions — read these carefully

The most consequential clauses, and the least examined at offer stage. Option agreements typically distinguish good leavers from bad leavers, and frequently give a short window — often 90 days — to exercise vested options after leaving. Exercising means paying the strike price, in cash, for shares you cannot sell. Many employees discover at that point that their vested options are practically unrealisable.

EMI: The Scheme That Matters Most

The Enterprise Management Incentive is the UK’s tax-advantaged option scheme for smaller companies, and the reason UK startup equity is worth more after tax than it would otherwise be.

Why EMI is advantageous

• No income tax or National Insurance on exercise, provided the options were granted at or above market value agreed with HMRC.
• Gains taxed as capital rather than income — a substantially lower rate for most people.
• Access to Business Asset Disposal Relief on preferential terms. This is the point most guides miss: BADR normally requires a 5% shareholding, which almost no employee has. For EMI shares that requirement is relaxed — relief can apply provided the option was granted at least two years before disposal, even where the company is not the holder’s “personal company”.

Non-EMI options

Where options are not EMI-qualifying — because the company or the individual does not meet the conditions, or the company never set up a scheme — the difference between market value and strike price at exercise is subject to income tax and National Insurance as employment income. That is a substantially worse outcome, and it is worth establishing which type you have been offered before accepting.

Other UK schemes

CSOP (Company Share Option Plan) is available where EMI is not, with its own limits and conditions. SAYE and SIP are all-employee schemes more common in larger companies than startups. RSUs appear in UK subsidiaries of US groups and are taxed as employment income on vesting — they are not options and the treatment is different.

Tax at Each Stage

The current CGT position (2026/27)

• Business Asset Disposal Relief: 18% on qualifying gains, up to a £1 million lifetime limit.
• Main CGT rates: 18% and 24%, depending on how much of the gain falls within your unused basic rate band.
• Annual exempt amount: £3,000.

Note that at 2026/27 rates, BADR at 18% matches the lower main CGT rate — so the relief now benefits higher and additional rate taxpayers, for whom the alternative would be 24%, rather than delivering the dramatic saving it once did.

What Allocations Typically Look Like

Ranges vary widely, and any figure should be treated as a rough orientation rather than a benchmark. Broad UK market conventions:

• Option pool size: commonly around 10% of fully diluted equity at seed, often expanded at subsequent rounds as it is used up.
• Senior hires (C-suite, first commercial or finance leader): typically a fraction of a percent to a low single-digit percentage, larger the earlier the stage.
• Early employees: smaller allocations, generally reducing sharply with each funding round as valuation rises and risk falls.
• Later joiners: often a nominal allocation, with cash compensation doing most of the work.

Evaluating an Equity Offer

A percentage on its own tells you almost nothing. Five questions matter more.

1. Percentage of what, and when?

Ask whether the figure is on a fully diluted basis, and what the current share count is. A percentage quoted against issued shares rather than fully diluted — excluding the unissued option pool and any convertible instruments — overstates the position.

2. What is the strike price and the current valuation?

Options struck at a high valuation need the company to grow substantially before they are worth anything. Options struck low in an early round can be worth a great deal for the same percentage.

3. Is it EMI?

The tax difference between EMI and unapproved options is substantial. Ask directly, and ask whether HMRC-agreed valuation has been obtained.

4. What are the leaver provisions and the exercise window?

If you leave, how long do you have to exercise, and what happens if you cannot fund it? This determines whether vested options are realisable or theoretical.

5. What is the realistic exit, and when?

Equity converts to money only on a liquidity event. Ask what the investors’ expected horizon is, and what liquidation preferences sit ahead of ordinary shares — in a modest exit, preference stacks can absorb most or all of the proceeds before ordinary shareholders receive anything.

A Realistic View of the Odds

Startup equity is genuinely valuable in a minority of cases and worth nothing in a substantial number. Most companies do not reach an exit that generates meaningful returns for ordinary shareholders, and liquidation preferences mean even a moderate sale can leave employee equity with little value.

That is not an argument against accepting equity — it is an argument for treating it as upside rather than as compensation. The practical test: would the cash element of the offer be acceptable on its own? If the package only works assuming the equity pays out, you are accepting a materially lower salary in exchange for a lottery ticket, and it is worth being clear-eyed that this is the trade.

Frequently Asked Questions

How much equity should a UK startup employee expect?

It depends heavily on stage and seniority. Senior early hires may receive a low single-digit percentage; later joiners typically receive a fraction of a percent. The pool set aside for employees is commonly around 10% of fully diluted equity at seed stage, expanded at later rounds. Any specific figure should be tested against the company’s actual cap table rather than a published average.

What is EMI and why does it matter?

Enterprise Management Incentive is the UK’s tax-advantaged share option scheme for smaller companies. It matters because there is no income tax or National Insurance on exercise where options were granted at market value, gains are taxed as capital rather than income, and Business Asset Disposal Relief can apply without the usual 5% shareholding requirement, provided the option was granted at least two years before disposal.

What tax do I pay when I sell startup shares?

Capital Gains Tax. For 2026/27 the main rates are 18% and 24% depending on your income, with a £3,000 annual exempt amount. Where Business Asset Disposal Relief applies, qualifying gains are taxed at 18% up to a £1 million lifetime limit. Note that the old 10% Entrepreneurs’ Relief rate no longer exists.

Is Entrepreneurs’ Relief still available?

Not under that name. It was renamed Business Asset Disposal Relief in April 2020, the lifetime limit was cut from £10 million to £1 million, and the rate has risen from 10% to 14% (April 2025) and then to 18% (April 2026). Guidance still quoting 10% is out of date.

What happens to my options if I leave?

It depends on the option agreement. Typically unvested options lapse, and vested options must be exercised within a limited window — often around 90 days — which means paying the strike price for shares you may not be able to sell. Good leaver and bad leaver definitions can change this substantially, and are worth reading before you accept, not after you resign.

Should I take equity instead of salary?

Only if the cash element works on its own terms. Equity is upside, not compensation — it converts to money only on a liquidity event that may not happen, and liquidation preferences can absorb the proceeds of a modest exit before ordinary shareholders see anything.

References & Further Reading

• GOV.UK — Enterprise Management Incentives (EMI)
• GOV.UK — Capital Gains Tax rates
• HMRC Capital Gains Manual — BADR rates from April 2025 and April 2026
• ICAEW — Tax resources

This guide is general information, not tax or legal advice. Share scheme treatment depends on individual circumstances and scheme terms, and tax rates change — rates stated are for the 2026/27 UK tax year and correct at the time of writing. Take professional advice before acting on an equity offer.

Adrian Lawrence FCA

Founder & Managing Director, FD Capital

Adrian Lawrence FCA is the founder of FD Capital and a Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW). He holds a BSc from Queen Mary College, University of London, and has over 25 years of experience as a Chartered Accountant and finance leader working with private, PE-backed and owner-managed businesses across the UK. He founded FD Capital in 2018 to connect growing businesses with the Finance Directors and CFOs they need to scale — and personally interviews candidates for senior finance appointments.

→ View Adrian’s ICAEW profile