To foot the bill means to pay for something, usually for someone else. Like, when you're at work and you go out with a vendor to a more expensive restaurant than you normally would because his company is footing the bill. I don't think you mean to convey that you are paying for something for someone else's benefit, do you?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.