Confirm how your servicer applies extra payments.
See how the balance changes
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Understand principal, interest and extra payments.
Estimate a mortgage amortization schedule and see how an optional extra monthly principal payment may affect payoff time and total interest.
Market contextNational 30-year average6.66%As of Jul 30, 2026
This Freddie Mac survey average is used only as a starting assumption where shown. It is not an HMCO offered rate.
View official source ↗First 12 payments
Estimated amortization preview.
The full schedule can span hundreds of payments. This preview shows how the first year may divide between principal and interest.
| Payment | Payment amount | Principal | Interest | Remaining balance |
|---|
Read the result carefully
What this estimate leaves open.
A calculator is best used to test assumptions—not predict an approval or final closing disclosure. Review these considerations before relying on the result.
Taxes, insurance and other escrow items are not part of the amortization schedule.
Actual payment timing and servicing practices can create small differences.