Going solo or partnering up: how to decide

Quick answer. Going solo gives you full control and simple decision-making, but you carry the financing, the skills and the workload alone. Partnering brings complementary skills and stronger financing capacity, at the cost of shared power and a risk of disagreement. The right choice depends on your needs and your temperament.

The question comes up at every business launch: should you go it alone or bring in partners from the start? It is not just about legal form. Your answer determines who decides, who finances, who carries the risk, how you are paid and taxed, and what happens the day the founders' paths diverge. Many founders choose by default, under time pressure, then discover the consequences too late.

This article offers a decision framework rather than a ready-made answer. We compare the benefits and risks of going solo versus partnering, then detail the legal, social and tax impacts, governance, and how to actually decide. As a firm registered with the Île-de-France Order of Chartered Accountants, we regularly support founders on exactly this point, ahead of the choice of structure.

The underlying trade-off is not legal, it is human and strategic. Three resources are at stake: skills, capital and decision-making power. Going solo leaves you 100 % of the power, but you must gather the skills and the financing alone. Partnering pools skills and financing capacity, but you give up part of the control.

There is no universal answer. A project that requires little capital and rests on a skill you master alone leans toward going solo. A capital-intensive project, or one that combines several trades you do not cover, often justifies a partnership.

Our take. The "alone or together" question too often gets confused with "EURL or SASU". These are two distinct decisions. You can start alone as a SASU and move to a partnership later: the legal form is chosen after settling the team question, not the other way round.

To go solo, three routes exist: the sole proprietorship (EI), the EURL (the single-member SARL) and the SASU (the single-member SAS). The choice between them carries clear social and tax consequences.

The sole proprietorship was simplified by Law no. 2022-172 of 14 February 2022, which created a single status for the sole entrepreneur separating the professional estate from the personal estate. The sole entrepreneur falls under the self-employed (TNS) regime.

The EURL-versus-SASU choice mainly turns on the social regime and how you pay yourself. The sole-member manager of an EURL is TNS, affiliated with the self-employed social security scheme: often lighter contributions, but different social protection. The president of a SASU is an assimilated employee, attached to the general scheme, without unemployment insurance: higher contributions, coverage close to that of an employee. To explore the solo route, our complete guide to setting up an EURL in 2026 details the steps. And when the hesitation is first about the legal wrapper, compare SASU and EURL for a single-member project.

Partnering requires at least two partners. The common forms are the SARL (2 to 100 partners), the SAS (at least two partners) and, more rarely, the SNC, where partners are jointly and severally liable for company debts without limit. This is a point of caution: the SNC commits each partner's personal estate, which limits its use.

Partnering means sharing capital, and therefore power. The allocation of shares determines voting rights and governance. A 50/50 split is comfortable at the start and dangerous afterwards: in case of disagreement, no majority emerges and the company stalls. This is one of the most frequent mistakes we see at the creation stage.

The underrated risk. Founders negotiate shares at length at the outset, almost never the exit. Yet conflicts arise later: a partner who invests less, another who wants to sell, a departure. Without written rules set in advance, these situations are resolved painfully, sometimes in court.

This is precisely the role of the shareholders' agreement: organising the entry and exit of partners, framing the transfer of shares and providing a conflict-resolution mechanism. See our 15 vital clauses of a shareholders' agreement. Drafting the articles of association deserves the same care: our essential clauses for SAS articles set out what must be locked down from signature.

The director's social regime in a multi-partner company#

In a SARL, the manager's social status depends on their stake: the majority manager is TNS, while the minority or equal manager is an assimilated employee. In a SAS, the president is an assimilated employee. This parameter affects the cost of contributions and the social coverage, and must be anticipated alongside the allocation of capital.

Taxation is not just a matter of structure: it shapes how you pay yourself. Two mechanisms deserve attention.

First, the taxation of profits. The EURL is subject to income tax by default, with an option for corporate tax (IS). The SASU is subject to corporate tax, with an option for income tax for a maximum of five financial years. These options, set out in the General Tax Code, change the balance between pay and dividends and must be studied case by case.

Next, the taxation of dividends. Dividends paid by a SASU or a SAS bear the single flat-rate levy of 31.4 % in 2026 (12.8 % income tax and 18.6 % social levies, the latter having been raised to 18.6 % by the social security financing law for 2026, Law no. 2025-1403 of 30 December 2025).

One technical point clearly separates the TNS world from the assimilated-employee world. In an EURL or SARL subject to corporate tax, the portion of the majority manager's (TNS) dividends exceeding 10 % of the share capital, issue premiums and current-account sums is subject to social contributions. This rule does not apply to the president of a SASU. It can weigh heavily in the pay-versus-dividend trade-off, and therefore in the choice of structure.

In practice. Before locking in the form, set out three figures: the expected profit, the income you want to draw each month, and the share you plan to leave in the business. Cross-referencing this data with the social regime and the treatment of dividends guides the choice far more reliably than general rules. Our business tax support exists precisely to run this calculation.

As soon as you go beyond one person, governance becomes central. Who signs, who commits the company, which decisions require everyone's agreement, how is a disagreement settled? These rules belong in the articles and the shareholders' agreement, not after the first conflict.

Here are the governance points to settle before creating with partners:

1. The allocation of capital and voting rights, avoiding a perfect tie where possible.
2. The decisions subject to a reinforced majority or to unanimity.
3. The conditions for a new partner joining and for the transfer of shares.
4. The fate of shares on departure, disagreement or default of a partner.
5. The mechanism for resolving deadlocks (mediation, forced buyout, exit clause).

These choices fall under the legal advice attached to the creation engagement. Our legal support for directors covers the drafting of these clauses, and our business creation service builds this thinking in from the start.

Several situations fall outside the general framework and deserve dedicated analysis.

• The token partner. Bringing a relative into the capital "to please them" or for a symbolic contribution creates a full-fledged partner, with voting rights and a right to dividends. It is a heavy decision, rarely reversible without cost.
• The hands-off investor. Some projects need capital, not a co-founder. A classic partnership is then not always the right answer: the allocation of power should reflect who works and who finances.
• Holding structures. When several partners hold the shares through their own structures, a holding company can organise ownership and the upstream flow of funds. The benefits and limits are detailed in our article on holding companies: pros and cons.
• The founder still unsure about the business model. Even before the partner question, the debate is sometimes about the nature of the project. If that is your case, see also when to move from a micro-business to a company.

Hayot Expertise advice. Partnering to fill a skill you could buy (a contractor, an employee) is expensive: you give up a permanent share of the capital for a temporary need. Reserve partnership for lasting, structuring contributions, significant capital, a trade you do not cover, a decisive network.

An anonymised case#

Recently, two founders consulted us before creating their company on equal shares. The project was solid, the relationship excellent, and that is exactly why they had planned no rule in case of disagreement. We led them to drop the perfect tie and to draft an agreement framing the transfer and exit of shares. A few months later, one partner's priorities changed. The framework allowed an orderly buyout, with no deadlock and no litigation. Without those clauses, the same situation would have paralysed the company.

A few markers to keep in mind this year:

• The single flat-rate levy on dividends stands at 31.4 % in 2026, after social levies were raised to 18.6 % by the social security financing law for 2026.
• The SASU's income-tax option remains limited to five financial years: it is a window, not a permanent regime.
• The 10 % rule on the dividends of a TNS majority manager still strongly differentiates EURL/SARL under corporate tax from SASU/SAS in the pay-versus-dividend trade-off.

This grid points a direction, it does not decide for you. The right reflex is to weigh the need for skills, the need for capital and your relationship to power, then check the social and tax consequences of each option, figures in hand.