By law a 10% gratuity tip for service is automatically added to your bill by restaurants so tipping is already figured into your final bill. It is customary to tip an additional 5 to 10% if the service is very good.
A decent tip for baggage handlers at the airports, hotels is $2.00 per suitcase.
It’s also customary to tip tour guides and drivers if the service they provided was good. It’s also customary to tip the grocery kid who carries out your groceries to your car 500 to 1,000 colones depending on how much groceries you have is fine. It’s also customary to tip the “guarda” or guard who watches your car when you park 500 t0 1,000 colones will do.