Founder Shareholders Agreement Ireland — The 2026 Guide

If you are about to start an Irish limited company with one or more co-founders, or you are already a co-founder and you have never put a shareholders agreement in place, this guide is for you. It is the handbook we wish every founder had read before the first share was issued — the document that prevents the most expensive mistakes in Irish startup life.

Because this is published by a Law Society of Ireland regulated firm, the detail below is accurate as of 2026 and reflects the Companies Act 2014, current Revenue Commissioners practice, and the market positions of the angel and venture investors active in Ireland today. Nothing here is legal advice for your specific situation — if you want that, the fastest route is a 30-Minute Startup Shares Advice Call or a 60-Minute Founder Strategy Call where we apply the rules to your company.

What a founder shareholders agreement actually does

An Irish company is a creature of its constitution, the Companies Act 2014, and the private contracts between its shareholders. The constitution is public and filed with the Companies Registration Office. The shareholders agreement is private, confidential, and contains the commercial reality of your company: who gets what, who decides what, what happens if someone leaves, and how new investors are brought in.

Without one, Irish default law kicks in. Default law was written for generic companies, not startups. It does not know that you and your co-founder agreed verbally over coffee that equity would be earned over four years, that one of you was bringing in intellectual property, or that nobody leaves without passing their shares back to the company. Default law will give a departing co-founder 100% of their issued shares forever, regardless of how short their tenure. That is the single most common cause of fatal damage to Irish early-stage companies, and it is entirely preventable with a one-time €249 document.

Our Founder Shareholders Agreement is designed specifically for this scenario: pre-seed to seed Irish startups with two or more co-founders. It is structured in the format Irish and UK angel and VC investors expect to see during due diligence, so when your first funding round arrives, the document needs light updates rather than a full rewrite.

The seven clauses that matter most

1. Equity split

How is ownership divided between the founders? Equal splits work when contribution is genuinely equal; contribution-weighted splits work better when it is not. If you are unsure whether your split is defensible, a Co-Founder Equity Split Review gives you a written, independent legal opinion on fairness and investor-readiness before you commit.

2. Vesting

Without vesting, a co-founder who walks out after three months keeps their full share. With vesting, shares are earned over time — typically four years with a one-year cliff — and the company has the right to repurchase unvested shares at nominal value when someone leaves. This is non-negotiable in investor due diligence. If your existing shareholders agreement does not include vesting, the Vesting Agreement Pack adds it as a bolt-on.

3. IP assignment

Every founder must cleanly assign to the company any intellectual property they have created that relates to the business — code, brand, designs, know-how. This is one of the most commonly missed pieces in Irish startups, and one of the hardest problems to fix retrospectively. Investors will kill a term sheet over it. Our founder shareholders agreement includes founder IP assignment as standard.

4. Decision rights

Which decisions require unanimous founder consent, which require a board vote, and which can the CEO make alone? If this is not written down, every significant decision becomes a negotiation. The agreement sets out a decision-rights matrix that protects minority founders while still allowing the company to move quickly.

5. Pre-emption, tag-along, drag-along

If a new investor wants to buy in, who gets the first right to buy the shares being issued (pre-emption)? If a majority shareholder sells their stake, can minority shareholders force the buyer to take their shares at the same price (tag-along)? If a majority wants to sell the company, can they force minority shareholders to sell too (drag-along)? These three clauses shape what happens at every future liquidity event.

6. Leaver provisions

Good-leavers (typically those who leave with the company’s consent, for illness, or at the end of their natural tenure) keep their vested shares and receive fair value. Bad-leavers (those who leave in breach of the agreement, commit gross misconduct, or compete with the company) typically forfeit shares at nominal value. The exact boundary between good and bad is negotiable, and our standard drafting errs on the side of founder-friendliness unless investor drafting requires otherwise.

7. Dispute resolution

What happens when the founders cannot agree? Mediation first, then arbitration, then court. Setting up this escalation pathway inside the agreement is significantly cheaper than relying on litigation when the dispute has already destroyed trust. For disputes that are already live, our Director / Shareholder Dispute Advice Call gives you a confidential 60-minute legal position and options analysis.

Share options and the KEEP scheme

Most Irish startups reach a point where they want to grant equity to key employees without giving them actual shares from day one. Share options are the mechanism. Irish law offers two routes.

The Key Employee Engagement Programme (KEEP) is a Revenue-approved share option scheme that taxes employees at the 33% capital gains rate rather than income tax rates of up to 52%. It is a substantial tax saving and a powerful retention tool — but it comes with strict qualifying conditions (SME size, excluded trades, working-director status of the participants, Revenue notification deadlines). Getting KEEP set up properly involves legal drafting, Revenue notification, and share valuation. We handle all three on a fixed fee of €395.

If your company does not qualify for KEEP — too large, excluded trade, or you want to grant options to contractors or advisors rather than employees — an Employee Share Option Scheme Setup is the right route. These unapproved schemes are taxed at full income tax rates on exercise, but they have no qualifying conditions and can be granted to any participant including advisors.

Raising investment

Every Irish startup that raises investment goes through due diligence. Angels run a lighter version; institutional investors run a thorough one. What they all look at is the same: cap table, share register, constitution, shareholders agreement, IP assignment chain, option scheme documentation, convertible instruments, past resolutions, and any outstanding or threatened disputes.

You have two options. You can enter due diligence cold and fix issues as they are found during the process — which gives the investor leverage to discount your valuation or insert punishing warranties. Or you can run an internal legal readiness pass first, fix the issues on your own timeline, and present a clean house when the term sheet arrives.

Our Investment Readiness Legal Pack covers the second option end to end — cap table audit, IP assignment review, shareholders agreement review against investor-ready standards, data room setup, and a written pre-investment report with a priority-ordered fix list. €595 fixed fee. Typical value preserved at term sheet: multiples of the fee.

Smaller but adjacent: a Cap Table Legal Health Check is a €295 fixed-fee forensic audit of just the cap table — share register vs CRO filings, option grants vs scheme docs, consistency of founder shareholdings with the shareholders agreement. Almost every early-stage cap table we review has at least one material issue. Finding them before your investors’ lawyers do is always cheaper.

SAFEs and convertibles

Angels and accelerators increasingly offer SAFEs (Simple Agreements for Future Equity) and convertible notes to Irish startups. They look simple on the first page and turn nasty in the conversion mechanics, valuation caps, discount rates, most-favoured-nation clauses, and maturity date triggers. Our SAFE / Convertible Note Review is a €249 fixed-fee legal review plus a numeric dilution model showing exactly what the instrument costs your cap table in likely conversion scenarios. If that review surfaces a problem, we can renegotiate on your behalf as a separate engagement.

Issuing new shares properly

Once you have agreed to accept investment, you actually have to issue the shares. This is where Irish SMEs most commonly trip up on corporate compliance. The Issue New Shares Pack handles every step — pre-emption review, board resolution, shareholder special resolution if required, share allotment, share certificate, updated share register, CRO Form B5 filing. €249 fixed.

For any other decision the board needs to document formally — director appointments, bank mandate changes, dividend declarations, contract approvals — our Board Resolution Drafting Service delivers a correctly drafted, Companies-Act-compliant resolution within 48 hours for €99.

Dealing with difficult situations

Three situations come up often enough to have their own service.

Minority shareholder pressure. If you are a minority shareholder being excluded from decisions, denied dividends, or pressured to sell at undervalue, Irish law gives you the powerful section 212 oppression remedy under the Companies Act 2014. Minority Shareholder Rights Advice is a €195 fixed-fee specialist consultation with a written opinion — usually the cheapest first move to understand your actual leverage.

Exit or buyout. When a co-founder or investor wants to exit, the transaction documentation is more involved than a simple share transfer — valuation mechanics, warranties, restrictive covenants, stamp duty, CRO filings, sometimes a share buy-back. Our Exit / Buyout Legal Pack handles the full transaction end to end for €495.

Share purchase by a buyer. If you are selling the whole company (or buying one), the share purchase agreement is the single most expensive document most founders ever sign. Warranties can make you personally liable for years. Our Share Purchase Agreement Review is a €395 fixed-fee independent markup of the draft — critical before signing.

Constitution amendments and governance hygiene

Most Irish companies adopt the default Companies Act constitution at incorporation, never touch it again, and then discover at a term sheet that it does not actually support what they want to do — multiple share classes, tailored pre-emption, investor consent rights. The Company Constitution Review & Amendments service fixes all of this on a €249 fixed fee — review, drafting, special resolution, CRO Form G1 filing.

The fastest path to clarity for your own situation

The guide above is the map. If you want it applied to your specific company with names, numbers, and a clear next-step plan, book one of two things:

Or browse all eighteen services in our Shares / Equity / Startup Law Ireland category.

Every service we offer is fixed-fee, delivered online, covered by solicitor-client privilege, and handled by a Law Society of Ireland regulated firm. No hourly billing surprises. Just the thing you asked for, at the price we agreed, within the timeline we committed to.