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how to draft a founders agreement uk

How to Draft a Founders Agreement in the UK

If you're building a startup with co-founders, knowing how to draft a founders agreement in the UK is one of the most important things you can do before you write a single line of code or spend a penny. A founders agreement sets out who owns what, who does what, what happens if someone leaves, and how decisions get made. Without one, you're relying on goodwill — and goodwill runs out fast when money or stress enters the picture. This guide walks you through every clause you need to include, what UK law requires you to think about, and where the common mistakes happen. It's not a substitute for a solicitor if your situation is complex, but for most early-stage UK startups, a well-drafted founders agreement can be produced without spending thousands on legal fees. We'll cover equity splits, vesting schedules, IP assignment, decision-making rights, and exit provisions — all in plain English.

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Why this matters

Most UK co-founder relationships start with enthusiasm and a handshake. Then six months in, one founder wants to pivot, another stops pulling their weight, or someone gets a job offer they can't refuse. Without a written founders agreement, you have no legal framework to handle any of it. Disputes over equity, roles, and IP are among the top reasons early-stage UK startups collapse — not bad ideas, not bad markets. The pain is real: founders lose companies, friendships, and money because they assumed everyone was on the same page. This page exists to help you get that agreement written before things go wrong.

The Atornee approach

Atornee lets you generate a UK-specific founders agreement in minutes, not weeks. You answer a structured set of questions about your startup — equity split, vesting terms, roles, IP, decision-making — and Atornee produces a draft built around UK company law and standard startup practice. You can review it clause by clause, ask plain-English questions about what each section means, and edit it before you sign. It's not a generic template from a US legal site. It's built for UK founders, using UK legal standards. If your situation involves complex IP, external investors, or existing employment contracts, Atornee will flag that and tell you when to bring in a solicitor.

What you get

A UK-compliant founders agreement draft covering equity, vesting, roles, IP assignment, and exit clauses — generated in minutes
Plain-English explanations of every clause so you understand what you're signing, not just what it says
Automatic flagging of high-risk gaps — like missing vesting schedules or undefined decision-making rights — before you finalise
A document structured around UK company law and standard early-stage startup practice, not US or generic templates
The ability to ask follow-up questions about any clause and get honest answers about when you need a solicitor

Before you sign checklist

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1. Agree the equity split with all co-founders before drafting — document the reasoning, not just the numbers
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2. Decide on a vesting schedule (typically 4 years with a 1-year cliff is standard for UK startups) and confirm all founders accept it
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3. List every piece of IP each founder is bringing in or creating — this needs to be assigned to the company explicitly
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4. Define each founder's role, time commitment, and what happens if that changes
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5. Agree on decision-making thresholds — what needs unanimous consent versus a simple majority
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6. Set out what happens when a founder leaves voluntarily, is asked to leave, or dies — including good leaver and bad leaver provisions
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7. Review the draft with all founders present before signing, and store a signed copy somewhere all founders can access

FAQ

Is a founders agreement legally binding in the UK?

Yes, if it's properly drafted and signed by all parties, a founders agreement is a legally binding contract under UK law. It doesn't need to be registered anywhere, but it should be in writing and signed. Verbal agreements between founders are extremely difficult to enforce and not recommended.

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

Not always. For straightforward early-stage startups with two or three founders, a well-structured template or AI-generated draft reviewed carefully by all parties is often sufficient. You should involve a solicitor if there's significant existing IP, external investors already involved, complex employment arrangements, or if founders are based in different countries.

What's the difference between a founders agreement and a shareholders agreement?

A founders agreement is typically signed before or at incorporation and covers founder-specific issues like vesting, roles, and IP assignment. A shareholders agreement is a broader document that governs all shareholders — including investors — and usually comes later when you raise funding. Many startups use a founders agreement early on and replace or supplement it with a shareholders agreement at Series A or when bringing in external capital.

What should a UK founders agreement include?

At minimum: equity split and vesting schedule, IP assignment to the company, each founder's role and time commitment, decision-making and voting rights, what happens when a founder leaves (good leaver and bad leaver provisions), confidentiality obligations, and governing law (which should be England and Wales, or Scotland if applicable). Missing any of these is a common and costly mistake.

Can we amend a founders agreement after signing?

Yes. A founders agreement can be amended if all parties agree in writing. Most agreements include a clause specifying how amendments must be made. It's worth reviewing your founders agreement at key milestones — raising funding, adding a co-founder, or significantly changing the business model — to make sure it still reflects reality.

What happens if we don't have a founders agreement and a dispute arises?

Without a founders agreement, you fall back on whatever is in your company's articles of association and UK company law — which are not designed to handle founder-specific disputes. In practice, this means expensive litigation, potential deadlock, and in the worst cases, the company becoming unworkable. Courts can intervene under the Companies Act 2006 in cases of unfair prejudice, but that process is slow and costly. A founders agreement is far cheaper than the alternative.

Related Atornee Guides

Cheap Contract Solicitor Alternative (UK)

Useful if you want to understand how Atornee fits into your broader contract workflow beyond the founders agreement.

Cheap Solicitor for NDA (UK)

Founders often need an NDA alongside their agreement — especially when sharing the idea before the agreement is signed.

Atornee Use Cases

See how other UK founders and business owners are using Atornee across different legal document types and workflows.

External References

GOV.UK Business and Self-employed

Official UK government guidance on setting up and running a business, including company formation requirements relevant to founders.

UK Legislation

Primary source for the Companies Act 2006 and other statutes that underpin UK founders agreement obligations and shareholder rights.

Trust & Verification Policy

Authored By

A

Atornee Editorial Team

UK Startup Legal Content

Reviewed By

C

Compliance Review Desk

UK Business Legal Content QA

Last reviewed on 3/4/2026

"This content is based on analysis of common UK startup legal disputes, standard founders agreement structures used by UK early-stage companies, and the requirements of the Companies Act 2006. It reflects practical patterns observed across hundreds of UK founder scenarios, not theoretical legal commentary."

References & Sources