The Latin pro bono is used to describe performance of (often professional or specialized) services for free or for reduced compensation. Is there a corresponding (hopefully Latin, perhaps pro-SOMETHING) phrase for performance of services for pay (i.e., normal/conventional compensation)?
I perused Wikipedia's list of Latin "P" phrases and didn't find anything satisfactory. Pro rata is perhaps plausible (in the sense of pay-as-you-go), but I don't think I have seen it used in this sense. I suppose the phrase I seek describes the "normal" case, so it doesn't often need a clarifying phrase (in contrast to the "abnormal" case described by pro bono).
I could certainly use a literal English phrase like "for money" or "for a fee" (e.g., as suggested here). However, that doesn't seem as elegant (as pro bono is somewhat more elegant and more specific than "for free"). I'm also interested in this as describing a situation: analogous to pro bono describing the arrangement of services being provided at reduced fee, this term explicitly identifies the arrangement as services being performed at the conventional rate.
Such a phrase could also be used in a somewhat jocular or droll way; for example, a student asking for help with an implicit pro bono sense:
Student A: Would you help me with my homework?
Student B: I would be willing to help pro [appropriate compensation]...
Perhaps that, itself, works in this usage... :)