Mortgage Amortization Calculator
Compare two scenarios side-by-side (defaults: 30-year vs 50-year). Add an extra monthly principal payment to see how much faster you pay off and how much interest you save.
This tool is for educational purposes and does not constitute financial advice.
Results
Scenario A
- Base monthly payment: —
- Total interest (w/ extra): —
- Payoff with extra: —
- Interest saved vs no extra: —
Scenario B
- Base monthly payment: —
- Total interest (w/ extra): —
- Payoff with extra: —
- Interest saved vs no extra: —
Comparison
- Monthly payment: —
- Total interest: —
- Payoff time: —
Balance Over Time
Remaining balance by month; Scenario A (blue) vs Scenario B (orange).
Show Amortization Table · Scenario A
| Month | Payment | Extra | Interest | Principal | Balance |
|---|
Show Amortization Table · Scenario B
| Month | Payment | Extra | Interest | Principal | Balance |
|---|
Note: Real mortgages often include escrow for taxes/insurance and may have different rates by term. This calculator isolates principal and interest for clarity.