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Result
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Formula and method
Interest-only monthly payment = current balance × annual rate ÷ 12. Repayment payment uses the standard fixed-payment amortization formula P × r ÷ (1 − (1 + r)−n), with P as the entered balance, r as the monthly rate, and n as the remaining monthly payments.
For product context, the Consumer Financial Protection Bureau explains HELOC draw and repayment periods and notes that HELOCs usually have variable rates. This calculator does not forecast those rates.
Worked example
A $100,000 balance at an entered 6% annual rate has a $500 monthly interest-only estimate. If that balance instead amortizes over 10 years at the same entered rate, the monthly estimate is about $1,110.21.
Limitations
This is phase-specific arithmetic, not a lender quote. It excludes future rate changes, new draws, fees, minimum-payment rules, introductory rates, credit limits, home value, and combined loan-to-value. HELOC rates are often variable, so the entered rate is only an assumption.
Outputs are deterministic arithmetic estimates, not lending, legal, tax, accounting, appraisal, or investment advice. Verify definitions and contractual figures with the relevant qualified professional or lender.
Frequently asked questions
Does this calculator retrieve lender or property data?
No. It uses only the values you enter and makes no live API request.
Are the results a financing offer or approval?
No. Results are educational estimates and do not represent underwriting, approval, rates, terms, or availability.