A HELOC is a revolving credit line secured by your home's equity

A HELOC (home equity line of credit) works like a credit card, but instead of borrowing against your creditworthiness, you borrow against the equity you've built in your home. The lender gives you access to a pool of money up to a certain limit — typically 80 to 90 percent of your home's current value minus what you still owe on your mortgage. You draw from that pool when you need it, pay interest only on what you've borrowed, and can borrow again as you pay it down.

The lender holds a second mortgage on your home as collateral, which is why HELOCs usually carry lower interest rates than credit cards or personal loans. If you stop paying, the lender can foreclose on your home, just as your primary mortgage lender can. This is the trade-off: lower rates in exchange for putting your house at risk.

Key Takeaways

  • A HELOC gives you access to a credit line secured by your home's equity, and you pay interest only on the amount you actually borrow.
  • Most HELOCs have a draw period (usually 5 to 10 years) when you can borrow, followed by a repayment period when you cannot draw new money and must pay back what you owe.
  • Interest rates on HELOCs are usually variable, meaning your monthly payment can rise or fall as the market rate changes.
  • Your home serves as collateral, so defaulting on a HELOC can result in foreclosure.
  • You need enough equity in your home to may have access to — most lenders require at least 15 to 20 percent equity after accounting for the new line of credit.

The draw period and repayment period work in two stages

Most HELOCs operate in two distinct phases. During the draw period, which typically lasts 5 to 10 years, you can borrow money as often as you want up to your credit limit. You make minimum payments, which usually cover only the interest you've accrued — you're not required to pay down principal during this time. This is when the HELOC feels most like a credit card.

Once the draw period ends, the repayment period begins, usually lasting 10 to 20 years. At this point, you can no longer borrow new money. Instead, you must pay back the full balance of what you've borrowed, plus interest, in monthly installments. Your payment will jump significantly because you're now paying both principal and interest, and you're doing it over a fixed timeframe. Many homeowners are caught off guard by this transition because their monthly payment can double or triple.

Interest rates are usually variable, not fixed

Most HELOCs carry a variable interest rate, which means your rate is tied to a market index (usually the prime rate) plus a margin set by the lender. When the prime rate rises, your rate rises. When it falls, your rate falls. This affects your monthly payment directly — if rates go up, you owe more each month even if you haven't borrowed any additional money.

Some lenders offer the option to lock in a fixed rate on part or all of your HELOC balance, but this usually comes with a higher interest rate than the variable option. A fixed rate gives you payment certainty but costs more upfront. A variable rate starts lower but exposes you to the risk that rates will climb and your payment will become unaffordable.

Because variable rates can change monthly or quarterly, your payment is unpredictable over time. If you're on a tight budget, this uncertainty can be a serious problem — especially during the repayment period when you're already paying more.

How to calculate how much you can borrow

Your HELOC limit depends on three things: your home's current market value, how much you still owe on your mortgage, and the lender's lending policy. Most lenders will let you borrow up to 80 or 90 percent of your home's value, minus your existing mortgage balance. That difference is your available equity.

For example, if your home is worth $300,000 and you owe $200,000 on your mortgage, your equity is $100,000. A lender offering 80 percent loan-to-value would let you borrow up to $40,000 on a HELOC ($240,000 total borrowing capacity minus your $200,000 mortgage). If the lender offers 90 percent, you could borrow up to $70,000.

The lender will order an appraisal to confirm your home's value, and they'll pull your credit report to assess your creditworthiness. Even if you have substantial equity, a low credit score or high debt-to-income ratio can reduce your limit or disqualify you entirely.

What happens during the application and approval process

Applying for a HELOC is similar to applying for a mortgage, though faster. You'll need to provide proof of income, recent tax returns, bank statements, and authorization for a credit check. The lender will order an appraisal, which typically costs $300 to $500 and takes 1 to 2 weeks. You'll also need to provide documentation of your existing mortgage and property tax information.

Once the lender has all documents, underwriting usually takes 3 to 7 business days. If approved, you'll receive a closing disclosure showing your credit limit, interest rate, draw period length, repayment period length, and any fees. You'll sign closing documents (often at a title company) and pay closing costs, which typically range from 2 to 5 percent of your credit limit.

After closing, you'll receive a checkbook, debit card, or online access to draw funds. Some lenders require a minimum initial draw; others let you leave the line untouched until you need it. You won't owe anything until you actually borrow money.

Fees and costs you'll encounter

Beyond interest, HELOCs come with several potential costs. Closing costs typically include an appraisal fee, title search, title insurance, and lender fees — totaling 2 to 5 percent of your credit limit. Some lenders waive closing costs to attract borrowers, but this is less common than it once was.

Many HELOCs charge an annual fee (typically $50 to $100) just to maintain the line, even if you don't use it. Some charge a draw fee each time you access the money. A few charge an inactivity fee if you don't use the line for a certain period. Read the disclosure carefully — these small fees add up over time.

If you miss a payment or your credit score drops significantly, the lender can freeze your line, preventing you from drawing new money. They can also raise your interest rate. In extreme cases, they can demand immediate repayment of your entire balance — a clause called a "demand feature" that appears in many HELOC agreements.

Common reasons homeowners use a HELOC

HELOCs are popular for home renovations because you can draw money as the project progresses and pay interest only on what you've spent so far. They're also used for debt consolidation — borrowing against home equity at a lower rate than credit card interest, then paying off high-interest debt. Some homeowners use them as an emergency fund, keeping the line open but unused until a major expense arises.

Others use HELOCs to fund education, medical bills, or a business startup. The flexibility of the draw period appeals to people who don't need all the money at once. However, this flexibility can also be dangerous — it's easy to keep borrowing and end up owing far more than you intended, especially if your income drops or rates rise sharply during the repayment period.

Frequently Asked Questions

What's the difference between a HELOC and a home equity loan?

A home equity loan gives you a lump sum upfront that you repay in fixed monthly installments over a set term, usually 5 to 15 years. A HELOC is a revolving line of credit where you draw money as needed during the draw period and pay interest only on what you've borrowed. Choose a home equity loan if you need all the money at once; choose a HELOC if you need flexibility or plan to draw over time.

Can I lose my home if I don't pay my HELOC?

Yes. A HELOC is secured by your home, meaning the lender has a second mortgage on your property. If you default, the lender can foreclose and force a sale to recover what you owe. This is why a HELOC is riskier than an unsecured loan — you're putting your home at stake.

What happens to my HELOC if interest rates drop?

If you have a variable-rate HELOC, your interest rate and monthly payment will drop when market rates fall. This is one advantage of variable rates. However, the opposite is also true — when rates rise, your payment rises. Some lenders allow you to lock in a fixed rate if you're concerned about future increases, though this typically costs more upfront.

Do I have to use my HELOC once it's approved?

No. Once approved, you can leave the line untouched indefinitely. You'll owe nothing until you actually borrow money. However, you may be charged an annual maintenance fee even if you don't use the line. Check your disclosure to see whether this applies to your HELOC.

What if my home's value drops after I open a HELOC?

If your home's value falls significantly, the lender may freeze your line or reduce your credit limit. In some cases, they may demand immediate repayment of your balance. This happened to many homeowners during the 2008 housing crisis. Your home's value affects how much equity you have available to borrow against.