RESTAURANTS
In France, you will always find a service charge on your bill, above the line for TVA (European Value Added Tax). This is included in the advertised prices in bars and restaurants. By law since 2008 the service charge must be passed on to staff and must be in addition to their salary. However, In some bars, the owner may even keep the totality or part of the tip charge.
In normal restaurants, including cafés, one can leave €1; for every €20. So if the check is €80, you can leave anywhere from €2-€4. Think of it as a gesture, not an obligation. Once again, it’s not necessary but is appreciated for good service. There are no rules about tipping in France.
In nicer restaurants, such as 3-start tables, where the service is exemplary, a tip of €20 is fine to leave.
TAXIS
Usually in France, tipping when you take the taxi is as important as in Northern-American countries. Even if the price of the ride has a minimum (usually around €4-6), you should tip at the end of the ride depending on the quality of the service. Tips usually may vary from €5 to €10 if it is a long ride. However, you never leave a tip in the Über or Heetch.
HAIRDRESSERS
If you somehow need a haircut in France, you should know that French people always leave a tip at the end. Usually it is around €2-3 if it is a very simple cut in a salon. If you go to a more fancy salon, the tip will get bigger as you will get a higher quality service.