Source date: 2026-07-22
Business status
Micro-business and sole proprietorship: understanding the distinction Published on July 23, 2026 - Entrepreneurship Public Service / Legal and Administrative Information Directorate (Prime Minister)
Micro-business and sole proprietorship can often be confused. They indeed share the same legal form since a micro-business is the simplified version of a sole proprietorship: it benefits from a simplified social security regime and a simplified tax regime.
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Sole proprietorship and micro-business allow you to operate a business in your own name. Their creation and management procedures are simpler than for a company.
There is actually no difference in legal status between these two entities since a micro-business is a sole proprietorship with simplified rules: it differs by having a simplified tax system and social security regime.
Micro-business is subject to annual revenue caps. If these thresholds are exceeded, the entrepreneur switches to the classic sole proprietorship regime.
Social security regime The first distinction concerns how social contributions are calculated.
Micro-business benefits from the micro-social regime: its social contributions are calculated as a percentage of its revenue. Thus, if its revenue is zero, no contributions are due. As for the contribution rate applied, it varies depending on the nature of the activity.
A classic sole proprietorship falls under the social security regime for the self-employed integrated into the general regime. During the first two years of activity, its contributions are calculated, provisionally, on a flat-rate basis corresponding to 19% of the annual Social Security ceiling (PASS), or €9,131 in 2026. The individual entrepreneur pays no contributions during the first 3 months, or 90 days. Contributions are then calculated directly on their net profit.
The individual entrepreneur must also pay a minimum amount of social contributions, even if there is no revenue.
Tax regime The tax regime is the other major distinction between micro-business and sole proprietorship.
Micro-business falls under the micro-tax regime. This regime consists, in particular, when calculating income tax, of deducting charges using a flat-rate deduction: titleContent, and not according to their actual amount.
It is taxed by default under a withholding tax mechanism, but can also opt, under certain conditions, for a liberatory payment of income tax.
Conversely, sole proprietorship is automatically subject to a real income tax regime (normal or simplified). It is thus taxed on its actual profit, after deducting charges actually incurred by the business.
Finally, the individual entrepreneur can also opt for corporate income tax.
Although the current legal term is "micro-entrepreneur", Urssaf still uses the term "auto-entrepreneur" for its official portal autoentrepreneur.urssaf.fr. This site allows you to declare your revenue and pay your social contributions.
See also
A deduction applied to a given amount that allows a taxpayer not to be taxable on part of the income declared during a tax year. This deduction includes business charges: social charges, salaries, rental costs in particular. The rates of this deduction vary depending on the activity carried out by the business.
Source: Service-Public Professionals