Estimate: home value × max CLTV (e.g., 85%) minus your current mortgage balance = your approximate available line. Higher value and lower existing balance mean a bigger HELOC.
The formula
Take your home value, multiply by the lender’s max CLTV (often 80–90%), then subtract your existing mortgage balance. The result is roughly your available credit line, subject to credit and income.
Example
On an $900,000 home with a $400,000 first mortgage at 85% CLTV: $900,000 × 0.85 = $765,000, minus $400,000 = about $365,000 potential line. Your actual limit depends on qualifying. We’ll run your real numbers.
| Input | Effect |
|---|---|
| Higher home value | Larger line |
| Lower existing balance | Larger line |
| Higher max CLTV | Larger line |
| Stronger credit | Better rate/terms |
Frequently asked questions
Can you tell me my exact line?
Yes — give us your home value and mortgage balance and we’ll estimate quickly, then confirm with a valuation.
Does my first mortgage reduce my HELOC?
Yes. The HELOC sits behind your first mortgage, so your existing balance is subtracted from the CLTV cap.
Is the estimate guaranteed?
No — it’s illustrative until valuation and underwriting confirm value and qualifying.
Save Financial is a California-licensed mortgage brokerage (NMLS #377740, DRE #01875766). Figures are illustrative for 2026 and not an offer of credit.