A HELOC lets you borrow against your home's equity in smaller amounts over time, not all at once
A home equity line of credit (HELOC) works like a credit card backed by your house. You borrow money as you need it during a set period (usually 5 to 10 years), pay interest only on what you actually use, and can borrow again as you repay. The lender sets a maximum amount you can borrow based on how much equity you have built in your home — typically 80 to 90 percent of your home's current value minus what you still owe on your mortgage.
The key difference from a home equity loan is timing and flexibility. A home equity loan gives you one lump sum upfront. A HELOC gives you access to money over months or years, so you draw only what you need when you need it. This means you pay interest only on the balance you're actually carrying, not on the full credit line.
Key Takeaways
- A HELOC has two phases: a draw period (usually 5 to 10 years) when you can borrow and repay repeatedly, and a repayment period (usually 10 to 20 years) when you can no longer draw new money.
- During the draw period, you typically pay interest-only on the amount you've borrowed, which keeps monthly payments lower than they will be later.
- Interest rates on HELOCs are usually variable, meaning your monthly payment can go up or down as the market rate changes.
- When the draw period ends, your remaining balance converts to a fixed payment schedule, and your monthly cost can increase significantly.
- Your home serves as collateral, so failing to repay puts your house at risk of foreclosure.
The draw period: how you access and use the money
During the draw period, you can borrow money whenever you want up to your credit limit. Most lenders let you access funds by writing a check, using a debit card tied to the account, or making an electronic transfer. Some HELOCs require a minimum draw amount (often $500 to $1,000) each time you borrow.
You only pay interest on the money you've actually drawn. If your credit limit is $50,000 but you've only borrowed $15,000, you pay interest only on that $15,000. As you repay that amount, the money becomes available to borrow again — similar to how a credit card works. This is why it's called a "line" of credit rather than a loan.
The draw period typically lasts 5 to 10 years, though some lenders offer longer or shorter periods. During this time, your monthly payment is usually interest-only, which means you're not reducing the principal balance — you're just paying the cost of borrowing. This keeps payments lower during the draw period but means your debt doesn't shrink unless you choose to pay down the principal.
Interest rates and how your payment changes
Most HELOCs have variable interest rates, which means the rate moves up and down based on a market index (usually the prime rate). When the prime rate rises, your interest rate and monthly payment rise with it. When it falls, your payment falls. This is different from a fixed-rate mortgage, where your rate and payment stay the same for the entire loan.
Your lender sets your rate as the index rate plus a margin — typically 0.5 to 2 percentage points above the index. If the prime rate is 8 percent and your margin is 1 percent, your rate is 9 percent. When the prime rate changes, your rate changes when ready or within a billing cycle, depending on your lender's terms.
Some lenders offer a fixed-rate option for part or all of your HELOC balance, which locks in your rate for a set period. This protects you from rate increases but usually comes with a higher starting rate than the variable option. Read your loan documents to see whether your lender offers this choice and what it costs.
The repayment period: when your payment structure changes
When the draw period ends, your HELOC enters the repayment period, which typically lasts 10 to 20 years. At this point, you can no longer draw new money. Whatever balance remains must be repaid on a fixed schedule, and your monthly payment usually increases significantly because you're now paying both principal and interest.
If you had a $30,000 balance at the end of your draw period and your repayment period is 15 years, your lender calculates a new monthly payment that will pay off that $30,000 plus interest over those 15 years. This payment is almost always higher than your interest-only payment during the draw period, even if your interest rate stays the same.
Some lenders require you to pay off your entire HELOC balance by the end of the repayment period. Others let you convert the remaining balance to a fixed-rate loan or refinance it into a new product. Check your loan agreement to understand what happens to any unpaid balance when the repayment period ends.
How your credit limit is set and what affects it
Your lender determines your HELOC credit limit based on your home's equity and your creditworthiness. Most lenders let you borrow up to 80 or 90 percent of your home's current market value, minus the balance you still owe on your first mortgage. If your home is worth $300,000 and you owe $200,000 on your mortgage, your available equity is $100,000. At 80 percent, your maximum HELOC could be $80,000.
Your credit score, income, debt-to-income ratio, and payment history also affect whether a lender approves you and what limit they offer. A higher credit score and lower existing debt usually mean a higher credit limit and better interest rate. Lenders may also reduce your available credit limit if your home's value drops, your credit score falls, or you miss payments.
Comparing HELOCs to other borrowing options
| Feature | HELOC | Home Equity Loan | Cash-Out Refinance |
|---|---|---|---|
| How you get the money | Draw as needed over time | One lump sum upfront | One lump sum, replaces your mortgage |
| Interest rate | Usually variable | Usually fixed | Usually fixed |
| Monthly payment during draw period | Interest-only (lower) | Principal and interest from day one | Principal and interest from day one |
| Closing costs | Typically lower | Moderate | Higher (full refinance) |
| Best for | Ongoing or uncertain expenses | One large expense | Refinancing existing mortgage |
Risks and what to watch for
Because a HELOC is secured by your home, failure to repay can result in foreclosure. This is a serious consequence that doesn't explore to unsecured debt like credit cards. If you cannot make your payments during the repayment period, the lender can force the sale of your home to recover the debt.
Variable interest rates create payment uncertainty. If rates rise significantly, your monthly payment during the draw period can increase by hundreds of dollars. Some HELOCs have rate caps that limit how high your rate can go, but not all do — read your documents carefully to understand your rate's maximum.
The transition from the draw period to the repayment period often catches borrowers off guard. A payment that was $200 a month (interest-only) can jump to $400 or $500 when you enter repayment and must pay down principal. Budget for this increase before you open a HELOC, or you may struggle to afford the payment later.
If your home's value drops, you may lose access to part or all of your credit line. During the 2008 housing crisis, many lenders froze HELOCs or reduced available credit limits when home values fell, leaving borrowers unable to access money they thought they had.
Frequently Asked Questions
Can I pay off my HELOC early without a penalty?
Most HELOCs have no prepayment penalty, meaning you can pay off your balance at any time without extra fees. However, always check your loan documents or ask your lender directly, because some products do charge a penalty if you pay off the line within a certain timeframe.
What happens if I don't use my entire credit line?
You pay interest only on the money you borrow, not on your unused credit limit. If your limit is $50,000 and you borrow $10,000, you pay interest only on that $10,000. The remaining $40,000 costs you nothing unless you draw it.
Can my lender reduce my credit limit?
Yes. Lenders can reduce or freeze your available credit if your home's value drops, your credit score falls, you miss payments, or economic conditions change. This happened widely during the 2008 financial crisis and can happen again during downturns.
What's the difference between a HELOC and a home equity loan?
A home equity loan gives you one lump sum upfront with a fixed rate and fixed payment. A HELOC lets you draw money as needed over time, usually with a variable rate and interest-only payments during the draw period. Home equity loans are better for one large expense; HELOCs work better for ongoing or uncertain costs.
Do I have to pay taxes on money I borrow with a HELOC?
No. Borrowed money is not income, so it's not taxable. However, the interest you pay may be tax-deductible if you use the HELOC to buy, build, or improve your home. Interest on a HELOC used for other purposes is generally not deductible. Consult a tax professional about your specific situation.