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how to draft a equity vesting agreement uk

How to Draft a Vesting Agreement in the UK

If you need to know how to draft a equity vesting agreement UK founders can actually rely on, this guide walks you through every clause that matters. A vesting agreement sets out how and when co-founders, employees, or advisors earn their equity stake over time. Get it wrong and you risk a co-founder walking away with a chunk of your company after six months of work, or a dispute that derails a funding round. Under UK law, vesting agreements typically sit alongside a shareholders' agreement or articles of association, and they need to be consistent with both. There is no single statute that governs equity vesting in the UK, so the document lives or dies on its drafting. This guide covers the core provisions you must include, the common mistakes founders make, and when you genuinely need a solicitor rather than a template. Practical, specific, and written for UK early-stage companies.

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Why this matters

Most UK founders only think about vesting when something goes wrong — a co-founder leaves early, a key hire quits before their cliff, or an investor asks to see the cap table and the vesting terms are nowhere to be found. Drafting a vesting agreement feels like admin, so it gets pushed back. Then a dispute surfaces and there is nothing enforceable in writing. The real pain is not the paperwork itself — it is the exposure you carry every day you operate without a properly drafted document. This page exists to remove that excuse.

The Atornee approach

Atornee lets you generate a UK-specific equity vesting agreement in minutes, not days. You answer a structured set of questions — vesting schedule, cliff period, good leaver and bad leaver definitions, acceleration triggers — and Atornee produces a draft built around UK legal standards. You are not copying a US template and hoping it holds up. You get a document you can review, edit, and take to a solicitor if the situation warrants it. For straightforward founder or employee vesting arrangements, most UK startups can get to a solid first draft without paying solicitor rates for the initial build.

What you get

A clear vesting schedule clause covering standard four-year vesting with a one-year cliff, or custom terms you define
Good leaver and bad leaver provisions drafted for UK employment and company law context
Acceleration clauses covering single and double trigger events relevant to UK acquisition scenarios
Reverse vesting mechanics that protect the company if a founder departs before full vesting
Definitions and boilerplate consistent with UK shareholders' agreement conventions

Before you sign checklist

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1. Agree the vesting schedule with all parties before drafting — standard is four years with a one-year cliff, but document whatever you have actually agreed
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2. Define good leaver and bad leaver categories clearly, including what happens to unvested and vested shares in each scenario
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3. Check your existing articles of association and shareholders' agreement for any provisions that would conflict with your vesting terms
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4. Decide whether you need acceleration on a change of control event and whether that is single or double trigger
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5. Confirm whether the equity is structured as options, growth shares, or ordinary shares, as this affects how the vesting agreement is drafted and taxed
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6. Consider whether an EMI option scheme is more appropriate than a direct vesting agreement for employee equity — HMRC has specific rules
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7. Once you have a draft, have a UK solicitor review it before any party signs, particularly if the equity value is material

FAQ

Is a vesting agreement legally binding in the UK?

Yes, provided it meets the basic requirements of a valid contract under English law — offer, acceptance, consideration, and intention to create legal relations. It should be signed by all parties and, where shares are involved, be consistent with the company's articles of association and any existing shareholders' agreement. A poorly drafted or inconsistent document can be challenged, which is why getting the drafting right matters.

What is a standard vesting schedule for UK startups?

The most common structure is four-year vesting with a one-year cliff. This means no equity vests in the first twelve months, then 25 percent vests at the cliff, with the remainder vesting monthly or quarterly over the following three years. This is not a legal requirement — it is market convention. You can use any schedule you agree, but investors will expect to see something close to this for founder and key employee equity.

Do I need a solicitor to draft a vesting agreement in the UK?

Not always for the initial draft. For straightforward arrangements between founders or with early employees, a well-structured template or AI-generated draft can get you most of the way there. You should involve a solicitor if the equity value is significant, if you are approaching a funding round, if the arrangement involves complex tax structuring such as EMI options, or if there is any ambiguity about the terms between parties.

What is the difference between a vesting agreement and an EMI option agreement?

A vesting agreement typically governs when shares already issued — or promised — are earned over time. An EMI option agreement grants an employee the right to buy shares at a fixed price in the future, subject to HMRC's Enterprise Management Incentive scheme rules. EMI options carry significant tax advantages for UK employees but come with eligibility criteria and HMRC notification requirements. If you are granting equity to employees, EMI is often the better route — but it requires specific documentation and HMRC registration.

What happens to unvested shares if a founder leaves?

This depends entirely on what your vesting agreement says. Typically, unvested shares are bought back by the company at nominal value or forfeited. Vested shares may be treated differently depending on whether the founder is a good leaver or bad leaver under the agreement's definitions. Without a vesting agreement in place, a departing founder may retain all their shares regardless of how long they stayed — which is exactly the scenario vesting is designed to prevent.

Can vesting agreements be used for advisors as well as founders and employees?

Yes. Advisor vesting agreements are common in UK startups and typically involve shorter schedules — often one to two years — with smaller equity allocations. The same core provisions apply: vesting schedule, cliff, leaver provisions, and any acceleration terms. Advisor agreements are generally simpler than founder agreements but should still be properly documented and signed.

Related Atornee Guides

Cheap Contract Solicitor Alternative (UK)

Useful if you want to understand when Atornee replaces solicitor time versus when you still need one for your vesting arrangement.

Cheap Solicitor for NDA (UK)

Founders sharing cap table or equity details with advisors often need an NDA in place first — pair these documents together.

Atornee Use Cases

See how other UK founders and operators use Atornee across equity, contracts, and compliance workflows.

External References

GOV.UK Business and Self-employed

Official UK guidance on running a business, including company formation and share structures relevant to vesting arrangements.

UK Legislation

Primary statutory reference for the Companies Act 2006 and contract law provisions that underpin UK vesting agreements.

Trust & Verification Policy

Authored By

A

Atornee Editorial Team

UK Equity and Contracts Research

Reviewed By

C

Compliance Review Desk

UK Business Legal Content QA

Last reviewed on 3/4/2026

"This content is based on analysis of UK startup equity documentation conventions, Companies Act 2006 requirements, and HMRC guidance on employee share schemes. It reflects common drafting patterns observed across early-stage UK company formation and funding contexts."

References & Sources