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 10 minUpdated March 2026

Declare revenue on URSSAF

Declare your revenue in a few clicks. Monthly or quarterly, we explain everything.

The 5 key steps

1Log in to autoentrepreneur.urssaf.fr
2Go to 'My current deadlines'
3Enter your revenue for the period (even €0)
4Check the contribution amount
5Validate and pay online

Guide Micro-Entreprise

Editorial team · Business law & Taxation

Updated on 29 January 2026

Verified on official sourcesSources: URSSAF, DGFiP, LegifranceOur methodology

Share this article

Discuss this article with AI

ChatGPT Claude Gemini Perplexity

More tools to discover

Flat-rate tax simulator

Compare flat-rate vs progressive tax

URSSAF contributions simulator

Calculate contributions with/without ACRE

VAT threshold simulator

Check your VAT status

CFE simulator

Estimate your CFE and exemptions

Declare revenue on URSSAF

More tools to discover

Frequently asked questions

What happens if I don't declare my revenue?

Should I declare monthly or quarterly?

Is the revenue book mandatory?