Both are second liens against your home. The difference is how the money arrives and how the interest is priced.
You borrow a set amount at closing and repay it on a fixed schedule, typically over 5 to 20 years. The payment never changes.
It suits a known, one-time cost — a defined renovation contract, a specific debt payoff.
You are approved for a limit and draw what you need during a draw period of about ten years, paying interest only on what you have drawn. After that, repayment begins and the payment jumps.
It suits staged or uncertain spending, but the variable rate means your payment can rise.
Run your own figures through the calculator. No credit check, nothing saved unless you ask.
Calculate my equitySometimes, if your combined loan-to-value stays under the lender's cap, but most lenders prefer a single second lien.
HELOCs usually do, and many lenders waive them entirely — often with a clawback if you close the line within three years.
Part of The Homeowner's Guide to Home Equity.
When it makes sense to replace your mortgage versus adding a second line of credit against your home.
Most lenders cap you at 80–85% CLTV. Here is the math on what that leaves you.
Typical HELOC credit score minimums, what rates each tier gets, and how to improve your odds.