$57,072.40

That's how much I save on my loan by merely paying an extra $63.11 each time.

for my $77,000 @ 7.00% it would be 207,141.45 if I made the minimum payments over the course of the 30 years, but with the $63.11; I only pay a total of $150,069.05. Which is still a lot but I pay it off over 8 years earlier, at payment 143 I start paying more principal than interest, instead of payment 242, note: almost the 100 payments sooner. By payment 261 it's over paid off by $108.50, instead of 360 payments, note yet again nearly 100 payments sooner. It would have taken 81 payments to break paying $100 on the principal and now I am already paying over $100, by 26.23 on my first payment, the upcoming one #3 mind you $127.70 and the payment number that I would be paying that amount of principal would have been #122.

And I can't friggin find my GMAC worksheet from the original.... grr....