Think of 20 percent as the marker of a great service, so you could tip 18 or 15 percent if you weren't totally pleased. Ideally, though, you would tell your hairstylist before you check out what you don't like about your cut or color so they can potentially fix whatever you don't like.

We asked three etiquette experts, two salon professionals and a certified financial planner. Most of these experts suggest leaving 15% to 20%, depending on the service and your satisfaction. Going with 20% is nice for the stylist and you because that math is pretty simple.

While some hair types may hold better the second or third day of washing, in most cases it's best to visit the salon with clean, dry hair. Despite what you may have heard before proms and formal dances back in the day, it's actually preferable to work with hair that is free of oil and buildup.

The discount is available every day all year round, and it only applies to haircuts, not other services. Be aware that the prices and discounts offered to seniors vary depending on the location.