Actually MOST loans work this way...we pay extra every month on PRINCIPAL of all of our loans, and we specifically spell this out. When DH's truck had a loan, GMAC would pull out the payment, and then I would send in a seperate check with payment for principal, this was noted on the memo of the check.
Same thing with mortgage, on the mortgage bill, each month it asks basically where to put the extra money.
John Deere credit is the same way- our tractor bill is the same as mortgage, on the ticket you specify where it goes.
If you do not specify, the money will go to the next due payment, where in fact, your not saving ANY money on interest...
Brandy
FYI I would NEVER sign for a loan that would not let me pay it off early without penalty..NO WAY! What happens if you come into some money and want to pay down debt....