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.

IntermediateManagementRead 10 minUpdated March 2026

Close your micro-enterprise: cessation guide

How to properly close your micro-enterprise: INPI declaration, final URSSAF declaration, taxes, CFE. Step by step.

The 4 key steps

1Declare cessation on the INPI one-stop shop
2Complete your final URSSAF declaration
3Declare your income to taxes (within 45 days)
4Handle CFE and close your accounts

Guide Micro-Entreprise

Editorial team · Business law & Taxation

Updated on 12 March 2026

Verified on official sourcesSources: URSSAF, DGFiP, LegifranceOur methodology

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