The tip for a comped meal is the same as it would be for any meal you pay for: 15%-20% of the bill (minus sales tax). When expensive wine is involved, some people discount the toke a bit, thinking that $30-$40 extra on the tip per $200 bottle of wine that the waiter uncorks and pours is a bit excessive.

Do you tip on a complimentary meal?

Given the meal was $175, I would gently suggest a tip of more than 20% to acknowledge the restaurant's goodwill. Perhaps $50. It's a nice round number and works out at 28%. That's not a lot between the two of you, given that you ate a great meal (even if the restaurant hadn't worked out its kinks).

What does it mean to have your meal comped?

What is a Comped Meal? ... Basically, a comped meal is a free meal at a restaurant. The word “comped” or “comping” comes from the word “complimentary.” Single food items or drinks can also be comped.