How do sign-on bonuses usually work?

I’m considering a FT job at a LTC facility that is offering $40/hr and a $10k sign-on bonus (before anyone warns me that the salary and bonus are red flags, I’ve worked at terrible places before and I’m not intimidated).

How does the sign-on bonus usually work? Do they pay you a chunk of it each month, or do you receive it after you’ve worked awhile?