Most self inking stamps get approx. 5,000 impression before you need to reink or replace the pad. We reink all self inking stamps purchased at our shop at no charge. (You will need to bring your stamp to our shop for this service) We also carry replacement pads for several brands of self inking stamps. We recommend reinking your stamp when it begins to lighten up. If you wait until your stamp is completely dry, it make not take new ink.