HELOC (Home Equity Line of Credit) Calculator
How to Calculate Your Available Home Equity Line of Credit
A Home Equity Line of Credit (HELOC) functions like a revolving credit card, but it is secured by the equity in your home. Determining how much you can borrow depends primarily on your Combined Loan-to-Value (CLTV) ratio.
Most lenders allow you to borrow up to 80% or 85% of your home's total value, though some may go higher depending on your credit score. The basic formula used by this calculator is:
(Home Value × Max CLTV %) – Current Mortgage Balance = Potential HELOC Limit
Understanding CLTV and Equity
Equity is the difference between what your home is worth and what you owe on your mortgage. However, lenders won't let you borrow 100% of that equity. They require a "safety net." This is where the CLTV comes in. If your home is worth $400,000 and your lender has an 80% CLTV limit, they will allow total debt (your mortgage + your HELOC) of up to $320,000.
Realistic HELOC Example
Imagine the following scenario:
- Home Value: $500,000
- Mortgage Balance: $300,000
- Lender CLTV Limit: 85%
First, calculate 85% of the home value: $500,000 × 0.85 = $425,000. Next, subtract the existing mortgage: $425,000 – $300,000 = $125,000 available credit line.
Why Use a HELOC?
HELOCs are popular for home improvements, debt consolidation, or emergency funds because they typically offer lower interest rates than personal loans or credit cards. During the "draw period" (usually 10 years), you often have the option to make interest-only payments, providing significant cash flow flexibility.