I am a little confused about amortization.
If I have an open and variable mortage that has an amorization of 25 years. If I plan to paid the off the mortage in 5 years, do I have to paid all the interest over that 25 years or just the interest of the 5 years? I plan to put large lump amount every year.
How does it exactly work? I know longer amortization period will provide less monthly payment but a larger overall interest payment.