The principal amount paid towards the debt is savings.
The interest portion of the payment is not.
I can't see that. Well, I can see it but I can't go along with it.
Paying down debt is danged important, but any money going to that end does not increase your FI stash. Yes, paying down the debt moves you towards FI by reducing your basic monthly outgo. But it does not build up the FI stash from which you will fund your job-free life.
Or are you seeing something there that I do not?
Consider this scenario.
I have 5k left from my paycheck after paying all expenses, including debt minimum payments. My monthly income is 10k.
A) I put it all in my bank account, earning 0.01% (or put it in stocks, or whatever).
B) I put half, 2500, in my bank account and use the other half to prepay principal Ina debt.
C) I throw all 5k at debt pay down.
In all 3 scenarios my net worth is the exact same.
You want to claim scenario A is a 50% savings rate, B is 25%, and C is a 0% savings rate?
I'd say they're all 50% savings rate. And once the debt is paid off, option A is your only choice. You'll still be "saving" 50% at that point, it's just going to a different area of your balance sheet.