How Often You Should Get a Haircut to Maintain a Style
If you want to maintain your current hairstyle, ask your stylist how frequently you should come in for appointments. Depending on the cut you have, the amount of time between trims will vary. "Short pixies should be cut every four weeks, [while] a bob or lob can be cut every six to eight weeks," explained Toth.
For other styles, a good rule of thumb is about two months. "On average your hair grows a half an inch every month," Toth said. "So if you want to maintain its current length, just have your hairdresser cut an inch [at these appointments]."