7.3. Social Security Contributions for Self Employed Persons
If you are self-employed in France then the level of your contributions will depend on the legal and tax status of your business, eg limited company, micro-entreprise, auto-entrepreneur.
The rules are complex and can only really be summarised here.
If you have micro-entreprise, or auto-entrepreneur business tax status you will pay social security contributions as a percentage of your turnover, whose rates will vary by type of business - around 13% to 25%.
If you operate on the basis of the régime réel then you pay social security contributions after deduction of your actual eligible costs, at a level of around 45% of net profits.
There are various exemptions that operate for the self-employed, notably in relation to those starting a business in a development area, or out of unemployment.