Is it ok in the sentence?

Those cards that are used for payment are used for road- tolls, in public transport or cashpoints or wherever you wish to foot the bill.
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?
No, I simply mean whenever you wish to pay.