Side business: micro-enterprise or company, which structure in 2026

Quick answer. For a side business launched alongside a job, the micro-enterprise is ideal to start simple and test: light formalities, contributions on turnover, 2026 thresholds of 203,100 euros (sales) and 83,600 euros (services), VAT exemption up to 85,000 or 37,500 euros. The company (single-member or multi-member limited company) becomes relevant to protect your estate, deduct real charges and gain credibility, at the price of more formality. Combining with a job requires respecting loyalty and any exclusivity clause.

Launching an activity alongside your job is increasingly common. The first question is the structure: micro-enterprise, simple and fast, or company, more protective but heavier? And how do you combine it with your job without risk? Here is the comparison for 2026.

The micro-enterprise is the natural route to test a side business.

Its strengths are simplicity: creation in a few minutes, lightened accounting, social contributions calculated as a percentage of the turnover collected, hence zero in the absence of receipts. The 2026 micro-regime thresholds are 203,100 euros for the sale of goods and 83,600 euros for services, not to be confused with the lower VAT-exemption thresholds (85,000 or 93,500 euros for sales, 37,500 or 41,250 euros for services). At the start of a side business, these thresholds are rarely a brake.

The micro is perfect to validate an idea, generate first revenue and learn, with no costs or formality. The detail of the regime is in our article on micro-enterprise accounting.

The company answers needs the micro does not cover.

Creating a single-member or multi-member limited company first brings protection of the personal estate, separate from the activity. It allows real charges to be deducted, which becomes worthwhile as soon as expenses are significant, where the micro applies a flat allowance. It also offers more credibility with clients and partners, and the option to take on partners or raise funds. In return, it requires more formality, real accounting and creation and management costs.

The move from micro to company is decided when the activity grows, as we explain in our article on the right time to move from micro to company.

The choice depends on the scale and ambition of the project.

For most beginner side businesses, the micro is enough; the company becomes necessary when the activity generates significant real charges, aims for growth or needs to protect the estate.

Launching a side business while employed requires some precautions.

The employee remains bound by a duty of loyalty to their employer (Labour Code art. L1222-1): they cannot run a competing activity or use the company's resources. Some contracts include an exclusivity clause, which prohibits any other professional activity; it must, however, be justified and proportionate, and can be lifted for business creation within certain limits. It is better to check your contract and, in case of doubt, discuss it with your employer. Civil servants are subject to their own combining rules.

Respecting these rules avoids a conflict with the employer, or even a dismissal, which would ruin the point of the side business.

For a side business, the micro-enterprise is almost always the right starting point: it allows testing with no risk or cost, and switching to a company later if the activity takes off. Wanting to create a company from the start for an uncertain project adds premature formality and costs.

Our approach is to start as a micro, follow the evolution of turnover and charges, and consider the company when real charges exceed the flat allowance, when estate protection becomes an issue, or when the project aims for growth. In parallel, checking compatibility with your employment contract is an essential prerequisite. The right reflex is not to choose the most complete structure, but the one matching the project's real stage.

An employee wanted to create a company from the launch of a still-uncertain side business, for credibility. The analysis showed that at the test stage, the micro-enterprise was largely enough: no significant real charges, modest turnover, and no immediate need for protection. Checking their employment contract confirmed the absence of a blocking exclusivity clause. They started as a micro, validated their market, then switched to a company the following year when the activity took off, at the right time.