Amortization inputs
Useful for fixed-rate loans where equal monthly payments apply over the full term.
Essential Calculator
Amortization Calculator
Use this amortization calculator to estimate how a fixed-rate loan balance declines and how payments shift between interest and principal.
How to use this page
- Enter the loan amount, annual rate, and term.
- Use the chart to see how the balance falls over time.
- Compare different terms to understand how interest front-loading changes.
Results
Monthly payment$2,144
Total interest$421,711
Total paid$771,711
M360$0
What this calculator helps you see
Amortization matters because many borrowers do not realize how much of the early payment goes to interest rather than principal.
When to use this calculator
Understand payment structure
This is useful when you want to see why early payments often reduce the balance more slowly than expected.
Compare loan terms
Amortization is a practical way to see how a longer term can reduce the payment while increasing lifetime interest.
Formula
Each payment = interest for the month + principal repayment
A fixed monthly payment is split between interest and principal, with the mix shifting gradually as the balance falls.
Worked example
On a longer loan, the early months can be heavily weighted toward interest, which is why amortization helps borrowers understand the real pace of payoff.
| Item | Value |
|---|---|
| Loan amount | $350,000 |
| Interest rate | 6.2% |
| Term | 30 years |
| Main insight | Balance usually declines slowly at first |
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Before you decide
- Outputs are estimates and should be reviewed against lender or plan-specific terms.
- Inputs are intentionally transparent so assumptions are easy to audit.
- Rates, fees, taxes, and account terms can change the final result.
Page details
- Updated April 15, 2026
- For assumptions and general guidance, see Methodology.
- For how explanatory content is written, see Editorial Policy.
What amortization shows clearly
| Term choice | Payment | Balance payoff pace |
|---|---|---|
| Shorter term | Higher | Faster |
| Longer term | Lower | Slower |
| Extra principal | Same or higher | Faster |
Questions and answers
Why does the balance fall slowly early on?
Because interest is charged on the full outstanding balance, and that balance is largest at the beginning of the loan.
Is amortization only for mortgages?
No. It applies to many fixed-rate installment loans with equal monthly payments.