Running Several Activities in One Micro-Enterprise: The Rules
Nothing requires a micro-entrepreneur to stick to a single trade. You can perfectly well sell products and invoice consulting, or combine a craft activity and a liberal one, within a single micro-enterprise. But multi-activity follows precise rules on rates, caps and affiliation fund. Here is how it works in 2026.
One business, several activities
You do not need to create several micro-enterprises to run several activities: a person can, in any case, only hold one micro-enterprise. However, this micro-enterprise can declare several activities, which you specify at the single window at creation (or a later modification).
We then distinguish:
- the main activity, the one generating the most revenue or that you declare as such;
- the secondary activity or activities, complementary.
This distinction is not trivial: the main activity determines your affiliation fund and certain administrative parameters.
Each activity keeps its rate
Essential point: when your activities fall into different categories (BIC sales, BIC services, BNC), each keeps its own contribution rate and its own allowance. You do not merge everything into a single rate.
| Activity | 2026 contribution rate | Income-tax allowance |
|---|---|---|
| Sale of goods (BIC) | 12.3% | 71% |
| Services (BIC) | 21.2% | 50% |
| Liberal professions (BNC) | 25.6% | 34% |
Concretely, you declare separately to URSSAF the revenue of each type of activity, and the right rate applies to each. To classify your activities well, see our guide BIC or BNC.
Caps for a mixed activity
This is the most technical point. When you combine sales and service provision, two limits apply simultaneously in 2026:
- total revenue must not exceed €203,100;
- within this total, the services share must not exceed €83,600.
A craftsman selling goods (BIC sales) and invoicing services (BIC services) must therefore watch both thresholds at once. Our article on the 2026 micro caps details these rules and the consequences of exceeding them.
The declaration: rigour essential
Multi-activity requires slightly more attentive accounting:
1. Split your revenue by activity as soon as you are paid, in your revenue log.
2. Declare separately to URSSAF the revenue of each category, so the right rate applies.
3. Monitor the caps, overall and specific, continuously.
An approximate split distorts the calculation of your contributions. Keep clear tracking, as our guide to micro-enterprise bookkeeping recommends.
Key takeaway: a single micro-enterprise can host several activities, each with its rate and allowance. The difficulty is splitting the revenue and tracking the caps, notably for a mixed sales + services activity.
Multi-activity and scaling up
Multi-activity is a good way to diversify your income without multiplying structures. But if one of your activities takes off and approaches the caps, it may become relevant to consider a suitable structure. Anticipate this moment with our guide moving from micro-enterprise to a company, and estimate your contributions per activity with the micro-enterprise simulator.