**HP Instant Ink** is a subscription service from HP that automatically delivers printer ink to your door before you run low, helping you save money and avoid the hassle of purchasing cartridges separately[1][2]. It charges based on the number of pages you plan to print monthly rather than cartridges, making costs predictable. Plans start as low as $1.79 per month with options to roll over unused pages and purchase extra pages if needed[1][2].

Key features include:

– **Automatic ink delivery** based on printer usage and ink levels, so you never run out.
– Pricing is per page, with the same cost for color or black and white printing.
– Cartridges hold more ink and use less packaging, providing sustainability benefits and cost savings passed on to customers.
– Hassle-free recycling with prepaid cartridge returns included.
– Available in several countries including the US, Canada, parts of Europe, Australia, and others.
– Most HP printers made in the past five years with Wi-Fi are eligible for the service; you can check specific compatibility on HP’s site[1][2].
– Optional add-on for paper delivery to never run out of printing paper[2].
– Customers generally save up to 50% on ink costs compared to buying cartridges traditionally[2][4][5].

The service is well-reviewed, boasting over 5,000 five-star ratings for convenience and savings. You receive a welcome kit when enrolling, and the cartridges for this service are special and only work with HP Instant Ink printers[2][3].

In summary, HP Instant Ink is designed for hassle-free, cost-effective ink supply management, especially beneficial if you print regularly and want to avoid the inconvenience and expense of buying cartridges manually. It also encourages recycling and reduces packaging waste[1][2][4].