What is a HELOC? (How It Works & Pros/Cons)
If you have lived in your home for several years, you have likely built up a significant amount of equity—both from paying down your mortgage principal and from the natural appreciation of real estate prices. A Home Equity Line of Credit (HELOC) allows you to borrow against that built-up wealth without selling your house.
While a HELOC can be an incredibly powerful financial tool for funding major home renovations or consolidating high-interest credit card debt, it comes with a major catch: you are putting your home on the line as collateral.

How Does a HELOC Work?
A HELOC functions very much like a credit card that is secured by the value of your house. Instead of giving you a single lump sum of cash, the lender gives you a maximum credit limit (e.g., $50,000). You can draw from this limit whenever you need it, and you only pay interest on the money you actually use.
The lifecycle of a HELOC is divided into two distinct phases:
1. The Draw Period
This is typically the first 10 years of the loan. During the draw period, you can borrow money up to your credit limit, pay it back, and borrow it again. Your monthly payments during this time are usually "interest-only," meaning the minimum payment does not reduce the principal amount you borrowed.
2. The Repayment Period
After the draw period ends, the HELOC enters the repayment period, which typically lasts 10 to 20 years. You can no longer borrow any more money. Your monthly payment will spike significantly because you are now required to pay both principal and interest to fully pay off the remaining balance by the end of the term.
How Much Can You Borrow?
Lenders will not let you borrow 100% of your home's equity. Most banks limit your total borrowing (your primary mortgage plus your HELOC) to 80% or 85% of your home's current appraised value.
For example, if your home is worth $500,000, 80% of its value is $400,000. If you still owe $300,000 on your primary mortgage, your maximum HELOC limit would be $100,000.
Pros and Cons of a HELOC
The Pros
- Lower Interest Rates: Because the loan is secured by your house, HELOC interest rates are significantly lower than personal loans or credit cards.
- Flexibility: You only borrow what you need. If you get approved for a $50k HELOC but only spend $10k to remodel a bathroom, you only pay interest on $10k.
- Tax Deductions: According to the IRS, the interest you pay on a HELOC may be tax-deductible if you use the funds to "buy, build, or substantially improve" the home securing the loan.
The Cons
- Variable Interest Rates: Unlike your 30-year fixed mortgage, most HELOCs have variable interest rates that fluctuate with the prime rate. If national interest rates rise, your monthly payment will increase.
- Risk of Foreclosure: If you lose your job and cannot make the HELOC payments, the bank can foreclose on your house.
- Payment Shock: Many borrowers are caught off guard when the draw period ends and their payment doubles or triples as they enter the repayment period.
