At the time I was living with a Mormon family (rented a room from them) they would receive every month a “bill” from the LDS which was for their tithe and building fund and for this and for that. They had to check off different boxes and put in the amount, write a check and mail it off. They would do this before any other bill was paid. Ten percent, right off the top.
Sorry. BS. I pay 10% “off the top” each month and do it before paying any bill, but tithing is not a bill.