Paying for page charges after a grant ends Often publications resulting from funded research are published after the grant ends. It seems nowadays more and more publishers are requiring fees (submission fees, page charges, and open access fees). How does one pay for these fees after a grant ends?
The way it works here in Japan, is that each professor has an amount of money called "discretionary spending", from there, they get money for these kinds of things. And is usual that if a professor has his name in the paper , he should use part of this money to pay for the submission.

That money does not comes form a grant, but the University's endowment, so I guess it depends on that.