This is an individual matter - depending on your natural eyebrow color and skin. We suggest anytime between 5-10 minutes. About 10 minutes will deliver a bolder but still natural look. First time users can leave it on shorter, this way, if the color turns out lighter then you pictured it, you’ll still have the option to go darker ;) For those who want something stronger, it is safe to leave INSTANT TINT on for up to 20 minutes.