Mortgage Extra Payment Calculator
See the power of paying extra on your mortgage. Learn how small monthly additions protect your wealth from compounding bank interest.
Loan Details
Accelerated Savings
Redirecting your saved monthly payments ($0/mo) for the 0 years you saved at a 7% annual return accumulates this wealth.
Maximize Your Mortgage Savings
Our Mortgage Extra Payment Calculator is built to determine the exact savings of adding extra payments to your mortgage principal. By targeting your principal balance directly, you reduce the underlying amount upon which interest is calculated, accelerating your journey to 100% home ownership.
How Extra Mortgage Prepayments Work
When you make standard monthly payments, your lender splits the money between interest and principal. Early in the loan, the majority of the payment pays for the cost of borrowing (interest). However, when you add an extra monthly principal payment, that specific portion goes entirely to reducing your outstanding loan balance.
This reduces the balance faster, which in turn reduces the interest charged in all future months. The compounding interest savings can be massive. For historical statistics and trends on mortgage terms, you can reference data from Consumer Financial Protection Bureau (CFPB).
Worked Numerical Example
Consider a mortgage balance of $400,000 at a 6.75% interest rate over a 30-year term, with an extra payment of $300/month:
- Mortgage Balance: $400,000
- Interest Rate: 6.75% (Fixed APR)
- Original Term: 30 Years (360 Months)
- Standard Payment: $2,594.30 / month
- Extra Monthly Payment: $300.00
| Payoff Scenario | Monthly payment | Total Interest Paid | Total Cost of Loan | Payoff Timeline |
|---|---|---|---|---|
| Standard Schedule | $2,594.30 | $533,948.12 | $933,948.12 | 30.0 Years |
| Accelerated Prepayment | $2,894.30 | $385,122.12 | $785,122.12 | 23.2 Years |
| Total Savings | +$300.00 / month | $148,826.00 Saved | $148,826.00 Saved | 6.8 Years Shaved Off |
When to Use This vs. Our Other Calculators
To select the most appropriate calculator for your planning:
- Use the Mortgage Payoff Calculator to calculate mortgage payoff dates specifically.
- Use the Mortgage Calculator to model standard residential mortgages with extra payment schedules.
- Use the Amortization Schedule Calculator to view your full month-by-month balance reduction breakdown.