The payoff amount was determined by the bank. Yes, my numbers are rounded for ease of understanding. The actual info: payoff quote per bank was $25,904 and good thru 3/17. Dealership payment was posted on 3/10, in the amount of $25,899.12, with ending balance of zero. So, I don't think interest was the reason. I was told the dealership also uses my lending bank for their loan servicing, so they have same day wiring capability.
Purchase price of my M3: $40K. Expected check to me should be $14,100.88 ($40K-$25,899.12) on the high end or $14,096 ($40K - $25,904) at the low end . Instead, the dealership gave me $14,050.
It's been 2 days since I've asked them for an explanation. Shouldn't my check amount be pretty straight forward: purchase price - payoff amount, with no other fees? None of my paperwork indicates extra fees either.