As a general guideline, beauty professionals such as nail salon employees receive gratuities that average 20 percent of the value of their services. Larger tips are appropriate at times, such as when procedures are unusually complex.
The general guideline of a 20 percent tip holds true for both high-end nail salons and stores that cater to the middle of the market. Customers may wish to consider adjusting the tip upward when services are discounted or complimentary. For instance, when using a half-off coupon, the tip should be based on the regular, non-discounted price of the services. When a stylist performs outstanding work, it is not unreasonable to offer a tip that is significantly greater, such as $20 for a service costing $30.