Loan Payoff Calculator

I'm looking to find a amortization calculator that will allow me to add a certain fixed amount of payment from somewhere in the middle of the loan. The results tell me my date of payment of new loans. For example a $ 15,000 loan at 5% APR for 5 years. The monthly payment is $ 283.07. But if I could start to add $ 200 more per month from 20 months. When ready, so be convinced that it would not take the full 60 months. It's not as simple subtraction of $ 200 more each month to balance. You thank you!

bankrate.com allow these additional payments in the future.

If that does not meet your needs, then use a standard calculator. Jump to month 20 in the amortization table and recalculate based on the 483 per month payment remaining principle balance. This will save you money in interest, but not as much as if you were to pay him in the first half of the loan.