Touch-ups (AKA: Color Boost) are required at a different time for each client. A general rule of thumb is 12-18 months to keep the color and shape fresh. You want your semi-permanent brows to be faded by about 50% before getting a touch-up. We want to avoid over-saturating the brows (creating brows that age poorly), but we DO want enough color left in the skin to avoid starting over. If you are not sure if your brows are ready for a touch-up, please reach out and send me some pictures, and I can help you decide!