An inkjet refill kit is a set of tools and a certain amount of ink used to refill ink cartridges. The specific tools and the amount or type of ink depends on which cartridge the kit is designed for. The purpose of an inkjet refill kit for consumers is that it offers a low-cost alternative to buying new cartridges.

Typically, a refill kit comes with a cartridge holder, bottles of ink and needles. The exact tools that come with the kit can vary by manufacturer or by which cartridge the kit is for. Some tools are found in all kits because they are necessary to refill, but others, like the cartridge holder or a needle to withdraw air from the cartridge, are optional.