HP Instant Ink is the ink service from HP that gives you a certain number of prints for a fixed price per month. The number of prints you can make per month, depends on the print plan you choose. There's the Print Regularly print plan which allows you to print 100 pages per month for € 7.99. For every user type, there's a suitable plan. After registering, you get the cartridges at home. When they're almost empty, your printer automatically takes care of new cartridges as it's directly connected to HP. This way, you'll never be without ink again.