Mortgage Amortization Calculator
Generate a full yearly amortization schedule comparison. Contrast a standard payoff timeline side-by-side with an accelerated extra-payment schedule.
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.
Analyze Your Mortgage Amortization Schedule
Our Mortgage Amortization Calculator builds a complete monthly or yearly schedule of your home loan, visualizing exactly how your monthly payment is split between the lender's interest fee and your actual principal reduction. By adjusting the inputs and adding an extra monthly payment, you can see how the entire table shifts to save you interest and pay off the mortgage years ahead of schedule.
How Mortgage Amortization Splits Work
For standard fixed-rate mortgages, the total monthly payment remains constant, but the proportion of your payment going to principal versus interest changes with every payment. In the early months of the loan, the principal balance is at its highest, meaning the monthly interest charge is also at its peak.
As you make payments and reduce the principal, the interest charge shrinks, allowing a larger portion of your fixed payment to go toward the principal. When you add an extra payment, that amount is applied entirely to the principal, accelerating the schedule. For details on how mortgage amortization operates under federal regulations, check the Consumer Financial Protection Bureau (CFPB) guidelines.
Worked Numerical Example
Let's look at an amortization comparison for a $320,000 mortgage at a 6.25% interest rate over a 30-year term, with an extra payment of $150/month:
- Loan Principal: $320,000
- Interest Rate: 6.25% (Fixed APR)
- Term: 30 Years (360 Months)
- Standard Monthly Payment: $1,970.43 / month
- Extra Monthly Payment: $150.00
| Payoff Option | Monthly Payment | Total Interest Paid | Total Cost of Loan | Payoff Timeline |
|---|---|---|---|---|
| Standard Schedule | $1,970.43 | $389,353.12 | $709,353.12 | 30.0 Years |
| Accelerating Amortization | $2,120.43 | $298,122.12 | $618,122.12 | 24.8 Years |
| Total Savings | +$150.00 / month | $91,231.00 Saved | $91,231.00 Saved | 5.2 Years Saved |
When to Use This vs. Our Other Calculators
To analyze your loan schedule or structure payments effectively:
- Use the Amortization Schedule Calculator to view generic loan amortization schedules.
- Use the Mortgage Calculator if you want to calculate mortgage payments with extra payment timelines.
- Use the Loan Interest Calculator if you want to focus specifically on minimizing the total interest paid.