Tips are generally customary when you valet park your car in the US. There is some disagreement about when and how much to tip, however. Some suggest a larger tip if you have a nice car and want to keep it safe. On the other hand, some feel that the parking fee that some parking establishments assess should already include the tip.
Most sources suggests tipping between 2 and 5 US dollars (USD) when a valet returns a car. When valet parking is free/complimentary, a tip is definitely required as this is the only source of income for the valet. If you are not sure about the amount, a safe bet is probably around $5.
Many still argue that the valet should also be tipped when he takes the car. The idea is that a few extra bucks will induce him or her to park the car with greater care.This may be a wise idea if you have a very expensive car. In this case, total valet tip can go up to $10.
Sometimes, you'll park your car yourself but have a valet return the car to you. In these situations, the standard 2-5 USD tip is applicable. It is not necessary to tip a garage attendant when parking your own vehicle, however. A simple rule for calculating the tip may be to tip at least 2-5 USD any time the person drives the car. Therefore, free valet parking offered at restaurants or other businesses mean tipping twice.
When visiting a foreign country, it is wise to look up the local tipping customs. Country-specific travel guides often have this information readily available. Tipping is not customary in some Asian countries and many European countries. Knowing appropriate tipping practices ahead of time can save you the embarrassment and anxiety about whether you should or shouldn't. It will also make sure that the workers are properly compensated.