Splitting equity between partners: the method without mistakes

Quick answer. Splitting equity between partners sets who decides, who receives dividends and who carries weight in governance. Do not lock in a 50/50 out of a reflex for fairness: weight it by contributions, involvement and risk, check the control thresholds (over 50 %, two thirds, one third) and frame it all with a shareholders' agreement.

When two or three people launch a company, the equity question often arrives too fast and gets settled too fast. They split it down the middle, sign the bylaws, and discover eighteen months later that no important decision can be made any more. Splitting equity between partners is not an administrative formality: it is the power structure of your company for the years to come. This article sets out the method we apply in incorporation files, the legal thresholds to know, and the configurations to avoid.

A share (in a French SARL, EURL, or a SAS, SASU, SA) is not just a percentage of ownership. Each security carries three distinct things:

• voting rights: power, meaning the ability to steer decisions at the general meeting;
• dividend rights: money, meaning the share of distributed profits;
• weight in governance: the real place in day-to-day and strategic trade-offs.

In the standard case, these three dimensions merge: 40 % of the capital gives 40 % of the votes and 40 % of the dividends. But they can be separated, and that is precisely what allows you to build a sensible split rather than a simple arithmetic division. The underlying rule stays the same: the split must reflect real contributions and preserve the ability to decide.

Before setting a single percentage, you need to understand the thresholds that trigger or block decisions. They vary by corporate form and by the bylaws, but the general logic is stable.

Our reading. The most underestimated threshold is not the majority, it is the one third. A partner who drops below 33.3 % loses the blocking minority: they can no longer oppose an amendment to the bylaws, and therefore a capital increase that will dilute them further. Many founders think in terms of "majority or no majority" and forget this intermediate zone that determines whether they keep a veto over heavy decisions.

The 50/50 looks fair, equitable, respectful of friendship or of equality between cofounders. In practice, it is the most dangerous configuration. No majority emerges: at the first deep disagreement, no decision can pass any more. The company becomes paralysed, the director can no longer be appointed or removed cleanly, and the dispute becomes legally insoluble without resorting to a third party or a judge.

The underestimated risk. The 50/50 causes no problem as long as everything is going well. It becomes a wall the day the two partners no longer agree on a structuring decision: hiring, raising funds, changing the model, removing a partner. In incorporation files, this is one of the most frequent causes of paralysis we see reported, and it was almost always avoidable from the start.

If the 50/50 is truly wanted (an assumed equal weight between two cofounders), it must be framed from the bylaws or the agreement:

• a casting-vote clause designating who decides in the event of a tie (the chairman's casting vote, for example);
• an organised exit right (buyback clause, cross-promises) to unwind a lasting deadlock;
• recourse to arbitration by a third party (mediator, expert, appointed arbitrator) set out contractually.

The split flows first from what each person contributes. Three categories of contribution coexist, and they do not weigh on the capital in the same way.

The contribution in skill deserves particular attention. It rewards the person who brings work and expertise rather than money, without artificially inflating the capital. It is allowed in a SARL and a SAS, but forbidden in an SA. It is a useful tool, provided you measure its consequences on the sharing of profits and voting rights.

You can give money to an investor without giving them control, or reward a key cofounder without over-weighting them financially. That is the point of preference shares, particularly flexible in a SAS (article L228-11 of the Commercial Code). They allow, for example:

• multiple voting rights so a founder keeps control despite dilution from a fundraising;
• non-voting shares for a purely financial partner;
• dividend preferences or preferences on the liquidation surplus.

Trade-off. Between a "simple" split (one security, one vote, one dividend) and a "separated" split through preference shares, the choice depends on your trajectory. If you stay two or three with no fundraising plan, simplicity wins: it costs less and is understood without a lawyer. If you anticipate the entry of investors, BSPCE stock-option plans or successive capital increases, structuring from the start in a SAS with preference shares avoids heavy restructurings later.

Here is the sequence we recommend in incorporation files, to move from an egalitarian reflex to a considered and defensible split.

1. List each person's real contributions. Cash, in kind, in skill: lay out plainly what each partner puts on the table, in value and in nature. This is the objective basis of any discussion.
2. Weight by involvement, time and risk. Someone who leaves a permanent job to work full time on the project does not take the same risk as someone who stays employed elsewhere. The financial contribution is not the only criterion; operational commitment counts just as much.
3. Check the control thresholds obtained. Once the percentages are sketched, check who exceeds 50 %, who reaches two thirds, who drops below one third. Make sure a decision can always be made and that no structural deadlock is created.
4. Choose the right corporate form and legal tool. SAS for flexibility and preference shares, SARL for a more framed structure. The choice of form conditions what you will be able to do with the split.
5. Document the logic of the split. Write down why each partner holds their percentage. This traceability protects everyone in case of later disagreement and eases the future entry of investors.
6. Provide for founder vesting. Shares are acquired progressively over time: a cofounder who leaves after six months should not keep 40 % of the company. Vesting aligns ownership with real commitment over time.
7. Anticipate future dilution. Entry of investors, a BSPCE plan for key employees, capital increases: model the evolution of the cap table so you do not discover too late that you have crossed a critical threshold.
8. Frame it all with a shareholders' agreement. The initial split is not enough: the agreement organises vesting, exit conditions, pre-emption clauses and dovetails with the legal rights of minority partners.

On vesting and exit at the moment of a fundraising, our analysis of the cofounders' agreement before a round details the clauses not to forget. For the full content of an agreement, see the fifteen vital clauses of a shareholders' agreement.

Two cofounders who genuinely want equality. If the 50/50 is a deliberate choice and not a reflex, never leave it bare. Add a chairman's casting vote, a tie-breaking clause and an exit mechanism. Equality of capital does not require equality of decision-making power over deadlocks.

A capital-providing partner with no operational role. Give them the dividends matching their contribution, but limit their influence over management through non-voting shares or an agreement locking ordinary decisions. A funder is not meant to arbitrate day-to-day choices.

A founder anticipating heavy dilution. If they know they will mechanically drop below the one-third threshold after several rounds, multiple voting rights (in a SAS) let them keep control while opening the capital. This is a typical case where the SAS form and preference shares make the difference.

A family-owned property company (SCI). The logic differs: you often reason in terms of dismemberment and transmission rather than operational power. The split is then thought through with a wealth-planning objective, and dovetailing with minority rights remains essential to avoid deadlocks between family branches.

In two-partner incorporation files, the scenario that comes up most often is the following: two friends or two former colleagues launch a SAS, one brings most of the cash, the other brings time and network. Out of a concern for fairness, they go with 50/50. As long as the project moves forward, no one asks any questions. The day they have to decide whether to raise funds or bring in a third partner, each digs in, and the company finds itself with no body able to decide. The cost of putting things back in order, once the dispute has set in, far exceeds what a clean framing at the start would have cost.

The equity split is never fixed once and for all. Three points deserve ongoing vigilance:

• the thresholds after each capital operation: a capital increase or the entry of an investor can tip a partner below the one third or below the majority without anyone having anticipated it;
• the consistency between bylaws and agreement: a shareholders' agreement that contradicts the bylaws creates legal insecurity;
• the rights of minority partners: they exist even without a clause, and ignoring them exposes you to disputes. Our guide to protecting minority partners reviews these legal rights.