Getting cash and using credit cards are easy in Paris, but there are a few things you should know.
There is a multitude of banks in Paris, both French and foreign. They are generally open from 9am to 5pm, or 6pm, from Monday to Friday, sometimes from Tuesday to Saturday. Certain branches may close at lunchtime, between 12.30pm and 2pm. Even though you may find some banks who will accept your currency in exchange for euros, you are more likely to come across exchange bureaux, which specialize in this type of transaction. Make sure you have some ID with you.
The essential to know
Your credit card
Your best source of cash is an automated teller machine (ATM) or cashpoint. You'll find ATMs on banks and post offices all over Paris, and most of them have step-by-step instructions in your choice of French, English, and other languages.
Many French ticket machines, card-operated gasoline pumps, and other vending devices require modern "smart cards" with embedded microchips.
American Express is not very popular in Europe...
Banks and exchange bureaux in Paris, such as the CCF, fix their rates according to the market which fluctuates from day to day. All rates should be displayed outside the agency. ATMs nearly always have better rates than currency-exchange offices and hotel reception desks.
Commission is usually charged on an exchange transaction. The amount will vary from place to place and also sometimes according to the form of payment, whether it be in cash, traveller’s cheques or credit card. It is advisable to check this prior to the transaction to avoid any unpleasant surprises. As a general rule it is not a good idea to exchange small sums, as the commission will be proportionally higher.
In Paris, you will find numerous exchange bureaux in busy tourist areas and they are usually open on Sundays too.
You can use your international credit card to withdraw euros at automatic cash machines in banks, 24 hours a day. Make sure you check beforehand with your own bank however, because you may be charged for this service.
If you exchange cash or traveler's checks, try to limit the amount, because changing money back into your own currency at the end of your will mean yet another exchange commission.