What Is a HELOC? A Plain-English Guide to Home Equity Lines of Credit

HELOC stands for home equity line of credit. It is a revolving line of credit secured by the equity in your home — you borrow, repay, and borrow again during the draw period, paying interest only on what you draw. Think of it as a credit card backed by your house, with lower interest rates and much higher limits.

How a HELOC Works in Brief

Your home equity is the difference between your home's market value and what you still owe on your mortgage. A HELOC turns a portion of that equity into a reusable credit line. Once approved, your lender sets a credit limit — the maximum you can borrow — and opens a draw period that typically lasts about 10 years.

During the draw period you can pull money from the line whenever you need it, in whatever amounts you choose, up to the limit. As you repay what you borrowed, that amount becomes available to borrow again. That revolving feature is the defining difference between a HELOC and a standard loan: a regular loan gives you one lump sum you pay down to zero, while a HELOC gives you an ongoing tap you can use repeatedly.

You pay interest only on the balance you have actually drawn, not on the full credit limit. If your limit is $80,000 but you have only drawn $15,000, interest accrues on the $15,000. Minimum payments during the draw period are often interest-only, which keeps early payments low — but also means the principal does not shrink unless you pay extra.

When the draw period ends, the repayment period begins. That usually lasts 10 to 20 years. You can no longer draw funds, and your payments switch to principal plus interest, so the monthly payment generally rises — a jump borrowers sometimes call payment shock. For a detailed walkthrough of each phase, see our guide on how a HELOC works.

Key HELOC Terms Explained

Draw period

The draw period is the window — typically around 10 years — during which you can borrow from your HELOC and repay and borrow again. Interest-only minimum payments are common during this phase. When it ends, the line closes to new draws.

Repayment period

The repayment period follows the draw period and typically runs 10 to 20 years. During this phase you pay down the remaining balance with principal-and-interest payments, much like a regular loan. Because principal is now part of the payment, monthly bills are higher than during the draw period.

Variable rate

Most HELOCs carry a variable interest rate made of two parts: an index, usually the Wall Street Journal prime rate, plus a lender's margin. When the index moves, your rate moves with it. Lenders set caps that limit how high the rate can go and sometimes how fast it can change, but the exact caps vary by lender. Learn more in our HELOC rates guide.

CLTV (combined loan-to-value)

CLTV compares all the debt secured by your home — your mortgage plus the HELOC — against the home's value. Most lenders cap CLTV at 80 to 85 percent, which means they want you to keep at least 15 to 20 percent of your home's value as equity. Your maximum line is roughly your home's value times that percentage, minus your mortgage balance. For example, on a $400,000 home with a $250,000 mortgage at an 80 percent cap: $400,000 × 0.80 = $320,000, minus $250,000 = a maximum line of about $70,000.

All figures are estimates for illustration only — not financial advice. Your actual terms will differ; confirm with your lender.

Credit limit

The credit limit is the maximum amount you can draw from your HELOC. It is set by the lender based on your home's appraised value, your mortgage balance, your credit history, and your income. The limit is a ceiling, not an obligation: you never have to borrow the full amount, and you only pay interest on what you use.

HELOC vs Home Equity Loan vs Mortgage

People often confuse these three products. This comparison shows how they differ in the ways that matter most to borrowers.

If you know the exact amount you need and want a fixed payment, a lump-sum loan may suit you better. If costs will arrive in stages — a kitchen remodel now, a roof in two years — the HELOC's flexibility is its main advantage. Compare the two in depth in our HELOC vs home equity loan guide.

Pros and Cons of a HELOC

Who a HELOC Is Good For

A HELOC may fit you if…

A HELOC tends to work well for homeowners with meaningful equity, steady income, and a disciplined repayment plan. It is a strong fit for staged home improvements, where you draw funds as each phase of work begins. It can also make sense for consolidating high-interest debt — replacing credit card balances at much higher rates with a lower-rate secured line — provided you address the spending habits that created the debt. Parents funding college tuition over several years and homeowners keeping a low-cost emergency backstop are other common use cases.

You may want to avoid a HELOC if…

A HELOC is a weaker choice if your income is unstable, your budget is already tight, or you would use the line to fund lifestyle spending without a repayment plan. Because the rate is variable, borrowers who could not absorb a payment increase should be cautious. And because the home secures the debt, anyone uncomfortable putting their house at risk for non-essential spending should look at unsecured options instead. If you are unsure, our article on whether a HELOC is a good idea walks through the trade-offs.

How to Get Started

Getting a HELOC starts with checking your equity and your credit, then comparing lenders on rate, margin, caps, and fees — not just the advertised introductory rate. The process from application to funding typically takes two to six weeks, depending on the appraisal and underwriting. Our step-by-step guide to how to get a HELOC covers the full application timeline, the documents you will need, and common denial reasons with fixes.

Before you apply, it helps to estimate what the line could cost you. Try the free HELOC calculator to model interest-only and repayment-phase payments at different rates and balances.