It depends on the cartridge. If you buy the subscription, you get special subscription cartridges that will stop working if you cancel, but they are included in

It depends on the cartridge. If you buy the subscription, you get special subscription cartridges that will stop working if you cancel, but they are included in the subscription price. If you buy normal cartridges, they will work until they are empty. If you paid money for a cartridge that doesn't work without a subscription, you got scammed by the seller, not by HP.