slow n steady wrote:I've decided I want to pay off my mortgage as soon as possible.
I don't have the necessary funds to pay off the entire note.
Question: If it is going to take me 5 years to pay off my mortgage, wouldn't it be better to put "extra" money in CD's or a savings account and pay off the mortgage all at once instead of applying it to the mortgage slowly over time.
It's better to put the extra money towards the mortgage, because...
I believe that extra payments on a mortgage don't effect the amount of interest that you are paying until you pay it all off or refinance.
This is not correct. Extra payments do not reduce the monthly payment due until the mortgage is gone or refinanced, but interest accumulates on the current balance. If you are currently paying $1000 a month on a 4.9% mortgage (0.4% per month) with a current balance due of $200,000, then you have $800 of interest accruing each month, and the other $200 goes to principal. If you pay down the balance by $10,000 then you will still owe $1000 the next month, but only $760 goes to interest and $240 to principal, so the following month's principal will be $10,040 less. That is, you earned 0.4% per month, or 4.9% per year, on your prepayment.
The earnings on the prepayment are taxable; the $40 less you paid in interest is no longer a deduction on your taxes. However, the earnings on a CD investment while waiting to make the prepayment are also taxable; therefore, you will come out ahead unless you can earn a higher rate on a CD than on your mortgage.