Yes, if you think he or she did a good job. If you would like a guideline, you can think of it as you would any service industry—the norm is 10-20%, though we very much appreciate whatever amount you feel is appropriate. For multi-session tattoos, itʼs customary to tip at the end of each session as opposed to at the end of a project. Please keep in mind that we can only accept tips in cash. Thanks!