Estimate equity available for a credit line and compare interest-only with amortizing payments on a draw.
Printed from Calxy · https://www.calxy.net/financial/heloc-calculator
0.01 – 10000000000
0 – 10000000000
0 – 100
0 – 10000000000
0 – 100
1 – 50
Modeled available credit line
$80,000.00
The LTV cap is your assumption. Rates and lender limits vary; unused credit, fees and future draws are not modeled.
Available line = home value × combined LTV cap − existing mortgage.
Interest-only monthly payment = drawn balance × annual rate ÷ 12.
Available line = home value × assumed combined LTV cap − existing mortgage balance, floored at zero. Interest-only payments use the actual drawn amount, not the unused line.
At $400,000 value and an 80% combined LTV cap, total secured borrowing is capped at $320,000. Subtracting a $240,000 mortgage leaves an $80,000 modeled line.
Interest-only payments do not reduce principal. Amortizing the same drawn balance over the repayment term adds principal repayment, even if the rate stays unchanged.
Last updated . Results are estimates for informational purposes only.