Notsure how to do this...

I want to start freelancing and this is my main concern.
Do I manage a clients domain name and hosting? Or do they make sure theyre payments are made monthly, yearly ect. Or is that something I should include in my pay to take care of for them.

Of course if it were a client I thought I would be wo\orking with for a while, I would offer to manage everything for them.

How is this usually done?
Thanks in advance!