@katlovesj, generally they have the entire month to pay. Like for instance my daughters father is court ordered to pay on the first of every month. They actually garnish his check and it comes out every two weeks. I’ve never gotten it on the first. If for some reason they can’t garnish the full amount for the month, it goes into arrears and adds interest.
@katlovesj, do you have the eppicard? You can also look on their site for pending deposits. You can set up your child support account online and it will tell you when they took out a payment. For me if they take it out on a Friday, I’ll have it Wednesday.