How much do you guys tip for service? In some situations, like carryout and curbside pickup, I'm not really sure how much I should leave, if anything, so I usually just don't tip. For restaurants, I usually tip 15-20%. The pizza dude I usually give $2-3 (used to give more but they started adding delivery charges to the bill). I've heard that in many other countries, tipping isn't customary or expected. In the US, servers make less than minimum wage without tips, so it's considered a huge insult not to tip. If I ever plan to return to a restaurant I don't want body fluids in my food, so I'll usually leave something even if the service was bad.