What happens if I don't declare my revenue?

If you don't declare, URSSAF applies a flat penalty. After several missed deadlines, your contributions are calculated on an increased basis. You must declare even if your revenue is 0 euros.

Should I declare monthly or quarterly?

You choose during registration. Monthly declaration is recommended for better cash flow management. Quarterly suits those who prefer less frequent declarations. You can change frequency once a year.

Is the revenue book mandatory?

Yes, it is a legal obligation for all micro-entrepreneurs. It must mention for each receipt: the date, invoice number, client, amount and payment method. Software like Indy generates it automatically.

BeginnerManagementRead 9 minUpdated March 2026

Micro-enterprise training: CPF, FAF and AIF

Your training rights as a micro-entrepreneur: CPF (€500/year), FAF (up to €7,500) and AIF. Funding, steps and pitfalls to avoid.

The 4 key steps

1Understand your 3 funding sources (CPF, FAF, AIF)
2Activate and use your CPF (€500/year)
3Identify your FAF and submit a request
4Avoid training scams

Guide Micro-Entreprise

Editorial team · Business law & Taxation

Updated on 19 March 2026

Verified on official sourcesSources: URSSAF, DGFiP, LegifranceOur methodology

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