[Romulus]

The standard restaurant markup for a bottle is 100-200%. Lower than 100% is a rare bargain; more than 200% is gouging.

[CatoRenasci]

Well, it's usually calculated off of wholesale rather than retail: typically it's three times wholesale, which usually works out to about three times retail, since the standard mark-up is 50% on wholesale (i.e., retail is 150% of wholesale).

Some places which are trying to be 'consumer friendly' mark up at twice wholesale, which looks like a 33.33% mark up over retail.

In New York, you sometimes see three times retail, which is really gouging!