Your monthly payment depends on how much you borrow and what interest rate your lender offers
A home equity line of credit (HELOC) does not have a fixed monthly payment the way a loan does. Instead, you pay interest on whatever balance you carry, and the payment changes as your balance and interest rate change. If you borrow the full $100,000, your payment will be higher than if you borrow $30,000. If your lender's rate is 8%, your payment will be higher than if the rate is 5%. Both numbers shift over time.
Most HELOCs have two phases: a draw period (usually 5 to 10 years) when you can borrow and repay as needed, and a repayment period (usually 10 to 20 years) when you can no longer borrow and must pay down the balance. During the draw period, many lenders let you pay interest-only. During repayment, you pay both principal and interest, and your payment rises.
The actual dollar amount depends on your lender's rate, your credit score, your home's equity, and current market conditions. Rates vary significantly between lenders and change over time, so there is no single "correct" answer—only a range based on what lenders are offering right now.
Key Takeaways
- A $100,000 HELOC borrowed at 8% interest costs roughly $667 per month in interest-only payments during the draw period, but this amount changes if rates rise or fall.
- During the repayment phase, when you must pay down principal as well as interest, your monthly payment will be significantly higher—often $1,000 to $1,500 or more depending on the repayment term.
- HELOC rates are variable, meaning your payment can increase if the prime rate rises, and lenders can freeze or reduce your credit line if your home value drops or your credit score falls.
- You only pay interest on the amount you actually draw, not on the full $100,000 credit line, so your real payment depends on your actual balance.
How HELOC payments work during the draw period
During the draw period, most lenders offer interest-only payments. You borrow what you need, and you pay only the interest that accrues on that balance each month. If you borrow $100,000 at 8% annual interest, the interest alone is roughly $8,000 per year, or about $667 per month. If you borrow only $50,000, the interest is roughly $333 per month.
The catch is that interest rates on HELOCs are variable. They are tied to the prime rate, which moves when the Federal Reserve changes its benchmark rate. When the prime rate goes up, your HELOC rate goes up within 30 to 60 days, and your payment rises immediately. When the prime rate falls, your payment falls. This is very different from a fixed-rate mortgage or loan, where your rate and payment stay the same for the entire term.
Some HELOCs offer a fixed-rate option for part or all of the credit line, which locks in a rate for a set period. If you lock in 8% on $100,000, your interest-only payment stays at $667 per month for as long as that rate is locked, even if the prime rate rises. Fixed-rate options usually cost more upfront or carry a slightly higher rate than the variable rate, so ask your lender what the trade-off is.
What happens when the draw period ends and repayment begins
When the draw period ends, the HELOC switches to repayment mode. You can no longer borrow new money, and you must pay down your balance over the repayment period—typically 10 to 20 years. Now your payment includes both principal and interest, and it is much higher than the interest-only payment was.
If you still owe $100,000 at the start of repayment and your rate is 8%, a 15-year repayment period means a monthly payment of roughly $955. A 10-year repayment period means roughly $1,213 per month. The shorter the repayment window, the higher the monthly payment. If your rate has risen to 10% by then, the payment is even higher.
Some borrowers are caught off guard by this jump. They spent the draw period paying $667 per month and suddenly face a $1,000+ payment they did not budget for. If you cannot afford the repayment payment, your lender can force you to pay off the entire remaining balance at once, which often means refinancing into a new loan or selling the home.
How rates and credit scores affect your payment
HELOC rates vary by lender and by borrower. Your credit score, the amount of equity in your home, your income, and your debt-to-income ratio all affect the rate you are offered. A borrower with a 750 credit score might get 7.5%, while a borrower with a 650 score might get 9.5% for the same $100,000 line. That 2% difference means $167 more per month in interest-only payments.
Current market conditions also matter. When the Federal Reserve is raising rates, HELOC rates rise across the board. When it is cutting rates, they fall. Over a 10-year draw period, your rate could move 2% to 3% or more, which significantly changes your payment. A rate that starts at 7% and rises to 10% means your monthly interest payment on $100,000 climbs from $583 to $833.
Your lender can also reduce or freeze your credit line if your credit score drops, your home value falls, or you miss payments. If your home loses value and your equity shrinks, the lender may lower the maximum you can borrow or close the line entirely. This does not change your payment on money you have already borrowed, but it prevents you from drawing more.
Comparing interest-only versus principal-and-interest payments
| Payment Type | Balance | Rate | Monthly Payment | What It Covers |
|---|---|---|---|---|
| Interest-only (draw period) | $100,000 | 8% | ~$667 | Interest only; balance stays at $100,000 |
| Principal + interest (15-year repayment) | $100,000 | 8% | ~$955 | Both principal and interest; balance shrinks each month |
| Principal + interest (10-year repayment) | $100,000 | 8% | ~$1,213 | Both principal and interest; balance shrinks faster |
| Interest-only (draw period) | $100,000 | 10% | ~$833 | Interest only; balance stays at $100,000 |
The table above shows how the same $100,000 balance produces very different payments depending on whether you are in the draw or repayment phase and what your interest rate is. Notice that a 2% rate increase ($667 to $833) is a $166 monthly difference during the draw period. During repayment, the difference is even larger because you are also paying down principal.
Many borrowers use a HELOC as a short-term tool: they borrow during the draw period, pay interest-only, and then pay off the balance before repayment begins. This works if you have a clear plan to repay the money—from a bonus, a home sale, or a refinance. If you do not have a repayment plan, you risk being unable to afford the payment when the draw period ends.
Fees and other costs that affect your total payment
Beyond the interest payment, HELOCs often carry fees that add to your cost. An annual fee (typically $25 to $100) is charged once per year. An inactivity fee (typically $25 to $50) may be charged if you do not use the line for a certain period. Some lenders charge a transaction fee (typically $0 to $25) each time you draw money. A few charge a prepayment penalty if you pay off the balance early, though this is less common.
These fees do not show up in the interest calculation, but they add to your total cost. A $50 annual fee on a $100,000 HELOC is small, but it is real money. Ask your lender for a complete fee schedule before you open the line.
You may also face a closing cost when you open the HELOC—typically $300 to $900 depending on your lender and your home's value. This covers the appraisal, title search, and paperwork. Some lenders waive closing costs to compete for your business, so shop around.
What to do if your payment becomes unaffordable
If your HELOC payment rises because rates went up or because you are entering the repayment phase, you have a few options. You can pay down the balance to lower the interest you owe each month. You can refinance the HELOC into a fixed-rate loan or a new HELOC with a lower rate, though this usually means paying closing costs again. You can request a modification from your lender—some will extend the repayment period to lower the monthly payment, though this means paying interest for longer.
If you cannot afford the payment and cannot refinance, your lender may force you to repay the entire balance. This often means taking out a personal loan, refinancing your mortgage, or selling the home. Plan ahead: if you are entering the repayment phase, calculate what the new payment will be and make sure you can afford it before the draw period ends.
Frequently Asked Questions
Can I just pay interest-only for the entire life of the HELOC?
No. Most HELOCs require you to enter a repayment phase after the draw period ends, usually after 5 to 10 years. At that point, you must pay principal and interest, and your payment rises. A few lenders offer extended draw periods or allow you to renew the line, but you cannot avoid repayment indefinitely.
What happens if I cannot afford the payment when repayment starts?
Your lender can demand that you pay off the entire remaining balance immediately. If you cannot, you may have to refinance into a new loan, take out a personal loan, or sell your home. This is why it is critical to plan for the repayment phase before you open the HELOC.
Will my HELOC payment go down if interest rates fall?
Yes, if your HELOC has a variable rate. When the prime rate falls, your rate falls within 30 to 60 days, and your monthly payment drops. If you locked in a fixed rate, your payment stays the same regardless of what happens to market rates.
Can the lender reduce my credit line or freeze my HELOC?
Yes. If your home value drops, your credit score falls, or you miss payments, your lender can reduce the maximum you can borrow or close the line entirely. This does not change your payment on money you have already borrowed, but it prevents you from drawing more.
Is a HELOC payment tax-deductible?
The interest portion may be deductible if you use the money to improve your home, but not if you use it for other purposes like paying off credit cards or buying a car. Consult a tax professional about your specific situation, as tax rules vary by circumstance.