User blog comment:MrPedroNorris/How much do you think a Zoldyck butler earns?/@comment-14902757-20150608174042

They probably don't just earn - they make enough to support every living relatives they have - if they have family relatives. Serving a world-renowned family of assassins must have that extensive coverage. Or maybe not, there's the possiblity of them being Zoldyck fanatics that they won't even require money in exchange for service and loyalty. But knowing that a good number of them are nen users, I think they receive more than just an ordinary (non-nen user) person could ever ask for. Trainees and apprentices though might have different compensations until they become officially called butlers.