HELOC Payment Calculator
Last updated: July 2026
Estimate monthly interest-only and repayment payments for a home equity line of credit.
Estimated repayment payment
—
- Interest-only payment: —
- Total repayment interest: —
On this page
Quick summary: Estimate monthly interest-only and repayment payments for a home equity line of credit. Enter the requested values, calculate, review the result, and compare more than one realistic scenario before making a decision.
Read the complete guide
What this calculator does
The HELOC Payment Calculator estimates payments on a home equity line of credit from balance, interest rate, and repayment assumptions.
How to use the calculator step by step
Enter the outstanding balance, annual rate, and payment structure requested by the page. Check whether the estimate is interest-only or includes principal repayment.
How the calculation works
During an interest-only period, payment can be approximated from the outstanding balance multiplied by the periodic interest rate. During repayment, amortization may be used.
Worked example and scenario testing
A 40,000 balance at 8% annual interest has an approximate monthly interest cost near 267 before principal repayment under a simple monthly estimate.
How to interpret your result
HELOC payments can change as the balance and variable interest rate change. An initially low payment may rise materially later.
Accuracy, assumptions, and limitations
Real HELOCs may include variable-rate indexes, margins, draw periods, repayment periods, minimum payments, annual fees, and rate caps.
Common mistakes to avoid
Do not assume an interest-only payment will reduce principal. Also avoid treating the current rate as fixed when the line is variable.
Privacy and browser-based calculations
Use only generic balance and rate figures. Do not enter property-account or lender-login information.