Depends on how slow it was, and how much I ordered. I tip 20% if the service was anywhere near reasonable, but if I find that a delivery driver is consistently slower than the others or my food arrives cold consistently, I won't tip and will call to complain.

For a delivery driver? Food as in like pizza delivery type stuff? I don't ever tip those guys more than $2 and change. But we also never order more than $15 dollars worth of food. It's just the two of us.

I am a tough tipper and I have some weird rules. I learned it from my dad. If service is great at a restaurant, we leave them 20%+ and a penny. If service is mediocre, 10-15% is sufficient. If it is horrible, they get 2 pennies. Yes, 2 pennies. I guess my dad learned this from his dad. If I am at a restaurant and my glass empties before they offer me a refill, their tip gets cut in half. Told ya...tough tipper.

Ever seen Waiting? lol

For delivery stuff? 2 or 3 dollars. But like Lauren, I don't ever spend over $20 because at most it's my boyfriend and I. Plus all of the places that deliver to me are within a 1 mile radius.

In restaurants, I'm a generous tipper if the service is good though. If the service is mediocre, 15% and not a penny more. If it's just plain bad, I don't tip; I've had servers that were more concerned with texting while working and hanging out with their friends in the restaurant. If the food was absolutely awful and done wrong, I wouldn't pay for that so why pay for absolutely awful service? You don't earn 15% just for showing up in my book.

I always tell myself when I place an order for pizza that I'm not going to tip on the order but by the time the person arrives I feel guilty and tip at least a dollar or two. Especially during the winter. I know the pizza place charges me for delivery and it pisses me off - just make the pizza more expensive so I don't feel like I'm being raked over the coals.

I always tip for Chinese delivery because I know a lot of those places are family owned and the drivers might not be making a lot, if any, money if they're also family.

I never ever tip less that 25%, more if the weather's nasty, and I've been known to send pizza drivers on side errands and then pay them extremely well. I'll order an $8 calzone during a slow time of the day, ask to talk to the driver directly, and send him by the drugstore or whatever. He'll usually pocket at least fifty bucks -- after the regular tip on the pizza -- under those circumstances, and it's saved my butt quite a few times when I couldn't pull off being two or more places at the same time.

I try to tip at least 15% and rarely less than $5.

20% to the delivery guy.

I find the tipping business intriguing. We don't do that over here. At least not in my state.
I know the state below me in areas do if people want to. But it's not big like over there.

It depends on if the place charges for delivery, if they arrived at a reasonable time, if the food was still warm, and if the order was actually correct. We don't order from KFC any more because they would frequently get ALL of those wrong. I just love waiting an hour and a half for cold chicken without the sides.

When we do tip, we usually round up the order to the nearest dollar plus a dollar or two, depending on how much the order value was.

I'm not a generous tipper in general. I wasn't raised in a culture that expects to be paid extra for doing the job you're employed to do, and wait staff here make the minimum wage or above.

I try to tip about 20% and maybe more if it was faster than expected. I usually drive and get it myself though so I don't have to tip. I don't order out very often though.

I never tip less than $3.50. This site has a calculator: link