[tyingq]

Doesn't work all the time, but my approach to this is to pad rates 10% beforehand, then offer a 10% discount on any invoice that follows one that was paid NET10. Whatever bean counter is pushing for NET45 or worse usually sees the benefit of going to NET10.

Discounting only the single invoice that follows one paid on time keeps them honest. Short or late pay me, and the next invoice gets no discount.