
Capital Gains Tax for individuals on the sale of investments
From 1st January 2008, these gains are subject to taxation of 18% income tax and 11% Social Contributions, i.e. 29% in total.
The first 25,000 Euros of gains are exempt from taxation.
Income tax on dividends received
From 1st January 2008, the taxpayer can opt for dividends received from French companies to be subject to taxation at source at 18%, with no further tax payable. This is know as a prélèvement forfaitaire libératoire (PFL). This option does not apply to shareholders of companies where there is a greater than 25% shareholding.
If the taxpayer does not make this election, the dividends must be declared in the annual tax return and are taxable according to the normal income tax scale. This is after a general deduction of 40%, and allowances of 1,525 Euros for a single person and 3,050 Euros for a married couple.
Dividend income is also subject to Social Contributions of 11%.
fica a fonte:
http://www.franceaccountants.com/tax.html#Gains
Já agora:
For residents, capital gains tax is a flat 30.1%, which includes 12.1% of social security taxes. If shares are held in a special account (called a PEA) which must be open for at least five years, the gain is only subject to social security taxes. The maximum amount that can be deposited in the PEA is €132,000. There is no tax if shares worth up to around €25,000 (limit raised every year) are sold in a given year. The gain realized on the sale of a principal residence is not taxable.
Esta fonte é menos fiável, pois é tirado directamente da wikipedia.