Computer printers that you can purchase nowadays will let you know when the toner is low and needs to be replaced. You will want to take care of this before you run out. The possibility of smeared prints or leakage is more when the level of ink in the toner cartridge is low. So that you don’t run out unexpectedly, you will want to keep extra xerox phaser ink on hand. Printer manufacturers usually recommend using their own replacement toner cartridges. By the way, it is probable that there are are multiple options for toner. Jot down the brand and model number of your machine if you want to replace your printer’s toner with a less expensive alternative. Once you have this information on hand, you can search on the internet or at a store for compatible ink. Both options have benefits. To make sure you are getting the lowest price on the internet please do an instant price comparison. Even with express shipping, it will still take three days to arrive at your destination. If you purchase a compatible xerox phaser ink in the store, you may end up paying a bit more, but you will be able to purchase a toner immediately.