What you should tip your waitress/waiter. Or another good quick way to figure the tip is to double the tax. Don't forget to add extra if $ was taken off of the bill due to a coupon or discount due to something being wrong. Remember the person waiting on u didn't cook the food so don't punish them if it didn't taste good. They make less than minimum wage plus their tips that they have to split w/food runners, hostess, & bar tender. Be nice, tip always, & tip extra on Sundays!