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… 🙂
Best Answer
So, to be clear, you're looking for a way to say "for money" in Latin: using a "pro" construct that's not in the list of phrases that are commonly used in English.
Perhaps "pro denario" (singular) or "pro denariis" (plural) -- where 'denarius' is Roman currency -- or "pro argento" (meaning silver), or "pro pecunia" (money), or "pro salario" or "pro honorario".
If you want to say that you're doing it in exchange for something (usually money), you can say that you expect a "quid pro quo", which is a well-known Latin expression.