January, February, March, December, etc. So, technically except when I paid in December, it was prepaid in some form. Over time, narrow definitions of things like:

"Tithing Fund"
"Mission Fund"
"Kids College Fund"
"New Car Fund"
"Emergency Fund"
"New House Fund"
"Roof Replacement Fund"
Etc.

Morphed into two things:

1. Brokerage Account
2. Money Market Account

I am not an "envelope" guy. I generally think of everything as pooled. So I am always investing independent of how it gets spent. In my narrative, I explain it more as an "envelope" process, because as people start, they tend to think in envelopes or buckets. For me, I would add up all of the buckets (in the above list) and see if I was fully funded or short, per the two accounts, and address it as a whole. As part of that, I look at my cash needs for the next several years and make sure I have reallocated to cash as needed, to derisk out of the brokerage account and equity investments.

When it comes to timing of "paying" tithing, I generally "sell" (aka donate) when I think it is a good time to take a profit, or I want to derisk to cash based on the needs.

Is that an answer to your question? I think for me, it is kind of an N/A on prepaid or in arrears.