Some of it depends on where you are. Around Dallas, people are more prone to tip 20% in the high end salons, 10% in the low end salons (End as in price - not end as in which end they are working on hahahaha!) For the more "involved" processes - ie: foil hilites or multi-color processes it's higher. For just a simple cut it's lower. Waxing legs = less; waxing booty = more.

I have been considering that myself - honestly - how bad is the pain? really...