Extra Payment Savings Calculator
Extra Payment Savings Calculator
Every extra dollar paid toward a loan's principal reduces the balance that future interest is calculated on — because interest compounds monthly on the outstanding balance, even modest extra payments compound into significant time and interest savings over a long loan term.
Homeowners and borrowers use this to decide whether an extra monthly payment is worth it compared to investing that money elsewhere, and to see concretely how many years earlier they could be debt-free.
- Extra Payments Go to Principal: Assumes the extra amount is applied directly to the loan balance, not just prepaying future interest.
- Bigger Impact on Longer Loans: The savings effect is most dramatic on long-term loans like 30-year mortgages, where compounding has decades to work.
- Compare to Investing: If your loan's interest rate is lower than expected investment returns, it may be mathematically better to invest the extra money instead — this calculator shows what you'd be giving up either way.
Why does a small extra payment save so much interest?
Because interest compounds on the remaining balance every month, reducing the balance early has a cascading effect — every future month's interest calculation is now based on a smaller number, for the entire remaining term.
Should I always pay extra on my mortgage?
Not necessarily — compare your loan's interest rate to what you could realistically earn investing that money instead. Extra payments make the most sense on higher-interest debt.
Extra Payment Savings Calculator
Every extra dollar paid toward a loan's principal reduces the balance that future interest is calculated on — because interest compounds monthly on the outstanding balance, even modest extra payments compound into significant time and interest savings over a long loan term.
Homeowners and borrowers use this to decide whether an extra monthly payment is worth it compared to investing that money elsewhere, and to see concretely how many years earlier they could be debt-free.
- Extra Payments Go to Principal: Assumes the extra amount is applied directly to the loan balance, not just prepaying future interest.
- Bigger Impact on Longer Loans: The savings effect is most dramatic on long-term loans like 30-year mortgages, where compounding has decades to work.
- Compare to Investing: If your loan's interest rate is lower than expected investment returns, it may be mathematically better to invest the extra money instead — this calculator shows what you'd be giving up either way.
Why does a small extra payment save so much interest?
Because interest compounds on the remaining balance every month, reducing the balance early has a cascading effect — every future month's interest calculation is now based on a smaller number, for the entire remaining term.
Should I always pay extra on my mortgage?
Not necessarily — compare your loan's interest rate to what you could realistically earn investing that money instead. Extra payments make the most sense on higher-interest debt.