Extra Mortgage Payment: $300,000 at 6.5% with $100 Extra/Month
Paying an extra $100/month on a $300,000 mortgage at 6.5% can save thousands in interest and shorten your loan term.
How to use this tool
- Enter mortgage balance, annual interest rate, remaining term and extra monthly payment in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your interest saved and the full breakdown beneath it.
See how adding just $100 per month to your $300,000 mortgage payment reduces interest and shortens the loan.
Frequently asked questions
- Should I pay extra principal or invest the money?
- It depends on your mortgage rate vs. expected investment return. If your mortgage rate is higher than after-tax investment returns, paying down debt is the better risk-adjusted move.
- How do I make sure extra payments reduce principal?
- Tell your lender to apply any extra amount to principal, not the next month's payment. Most servicers allow this online or by note on a check.