score:6
You can pay for almost everything by Visa or Mastercard in Paris. There might be a minimum purchase amount of a few euros; 5 or 10 euros used to be common but many places have lowered that minimum. There are only a few places where you should expect to have to pay in cash:
I've never seen a place that took Mastercard and not Visa or vice versa. On the other hand, most shops don't take American Express, apart from hotels, upscale restaurants and fashion stores.
Upvote:2
"Most" places? Yes. Street traders etc are unlikely too, you may find some other exceptions.
Some places may have a minimum transaction amount required for a card purchase. I've never noticed receiving any more than the usual Parisian condescension to outsiders when paying by card.
Upvote:3
Most shops will accept visa/mastercard, but it never hurts to verify if they have this sign before making a purchase:
Some shops (typically small cafés and shops selling cigarettes and newspapers) will have a minimum payment amount for which they accept cards. This is usually on display near the cash desk: if you see a sing saying
Payements par carte à partir de 10€
or
Achats < 10€ uniquement en espèces
you'll know you have to pay at least that amount to use your visa. The keywords here are carte meaning card and espèces meaning cash.
Most supermarkets have no minimum payment rule and will accept your card for any amount.