This toner lasts forever. Even with the amount of prints that we do, it will last for months. I am quite impressed with the yield on these and the quality of the printouts. We tried using generic toners before but the quality was horrible and they don't last as much as they advertise. With the dual pack, extra capacity toners, and with best buys prices (which, at the time, to my surprise, was lowest out of all other vendors) it's pretty close to generics in terms of per page cost and we don't have to deal with subpar quality prints or toners leaking out everywhere.