Baziloo Academy Level: Beginner ⏱ 4-minute read

Taxation of investments: understanding the tax implications of your investments

By The Baziloo Editorial Team ·Published on 18 July 2026 at 3.45 pm

When you invest in the stock market, the government levies tax on your profits. This article explains in simple terms how these taxes work, what they are levied on and how to calculate them, so that you can better anticipate your returns.

🎯 What you’ll learn

Identifying the two types of taxable income from the stock market
Understanding the difference between capital gains and dividends
Understanding the applicable tax rates
Calculate the tax implications of a simple investment

What is it all about? Tax on your stock market profits

When you buy a share or a fund (a basket of several shares), the Government does not tax your purchase. However, it does levy tax on the returns you receive from them. These returns take two forms: capital gains and dividends.

Taxation of investments refers to the set of rules that determine how the government taxes your gains on these investments. It is important to understand this as it reduces your actual returns. For example, if you make a profit of 1 000 € on the stock market, you may only be left with 700 € after tax.

The good news is that the rules are the same for everyone, and they are predictable. You can therefore work out the tax implications before you invest.

The two sources of taxable income

First source of income: capital gains. This is the profit you make when you sell a share for more than you paid for it. Example: you buy a share100 € and sell it150 €. Your capital gain is50 €. It is this profit of50 € that will be taxed.

Second source of income: dividends. This is the money that the company pays you regularly because you are a shareholder. For example: you own one share in a major bank. Every year, the bank pays you a dividen5 €. This money is also subject to tax.

Important: if you never sell your shares, you do not pay capital gains tax whilst you hold them. Tax is only payable upon sale. Dividends, on the other hand, are taxed each year as soon as you receive them.

How do direct debits work?

In France, there are two main tax schemes. The default scheme is known as the ‘prélèvement forfaitaire unique’ (PFU). It applies a fixed rate of 30 % to your earnings, divided into two parts: 12,8 % for income tax and 17,2 % for social security contributions.

A practical example: you realise a capital gain of1 000 €. Under the PFU, you pay300 € in tax. You are left with700 €. It’s simple and automatic: your broker (the platform where you invest) deducts this tax directly.

Alternatively, you can opt for the progressive tax scheme, where your tax liability increases as your earnings rise. This scheme may be more favourable if your earnings are low, but more onerous if they are high. You make this choice when you file your tax return.

Key points to bear in mind before investing

Firstly, tax reduces your actual returns. A pre-tax gain of 10 % becomes approximately 7 % after tax under the flat tax rate.

Secondly, tax is only payable if you make a profit. If the value of your share falls, you pay nothing. Losses are not usually refunded, but they can be set off against gains from other investments.

Thirdly, certain investments offer special tax benefits (such as the PEA or life assurance). These schemes can enable you to pay less tax or defer it until a later date.

📖 Definitions

Capital gain: The profit made when you sell an investment for more than you paid for it. Example: purchase100 €; sale150 € = capital gain of50 €.
Dividend: Money paid out regularly by a company to its shareholders, taken from its profits. It is a share of the company’s profits distributed to its owners.
Single Flat-Rate Levy (PFU): The standard tax regime in France, which applies a flat rate of 30 % on investment income (capital gains and dividends).
Broker: A platform or broker that enables you to buy and sell shares on the stock market. Examples: Boursorama, Degiro, Saxo Bank.
Tax budget: A legal framework that offers tax benefits for your investments. Example: the PEA (Share Savings Plan) allows you to pay0 %s of tax after five years.

💡 A practical example

You invest 10 000 € in a share at 100 €. You buy 100 shares. A year later, the share is worth 110 €. You sell them: you receive 11 000 €. Your capital gain is 1 000 €. Under the flat-rate tax (PFU), you pay 300 € in tax (30 % of 1 000 €). Your net gain is 700 €. Your real return is 7 %, not 10 %.

⚠️ Risks you need to be aware of

Tax reduces your actual returns: a pre-tax profit of 10 % leaves you with just 7 % after tax under the flat tax rate.
Dividends are taxed annually, even if you do not sell your investment.
Failing to declare your stock market gains may result in penalties. Brokers automatically report these to the tax authorities, but you must also declare them on your tax return.
Certain exotic or complex investments may be subject to different and less favourable tax rules.
Selling quickly (in less than a year) makes no difference to the tax liability: the flat-rate tax applies in the same way, whether you hold the property for one month or ten years.

✅ Key points to remember

The government levies a flat-rate tax (30 %, PFU) on your capital gains and dividends from the stock market.
Capital gains are only taxed upon sale; dividends are taxed annually.
Your actual returns are reduced by approximately 30 % compared with gross earnings.
Tax-efficient schemes such as the PEA offer significant long-term benefits.
Take tax implications into account in your investment strategy to better assess your actual returns.

🧠 Test your knowledge

1. You buy a share at 50 € and sell it at 70 €. What is your taxable capital gain?

2. Under the PFU, what percentage of tax do you pay on your stock market gains?

Fancy taking it a step further?

Analysise this security in detail on Baziloo — B-Score, risk metrics, price history — and track it in your portfolio.

📊 Explore the values on Baziloo → Ideas to explore All articles

Sources

Public Services — Taxation of savings — service-public.fr
impots.gouv.fr — impots.gouv.fr