Introduction
A HELOC is a home equity line of credit. You borrow against the value of your home, and you pay it back with interest. Most HELOCs have a variable rate, so your payment can go up or down over time.
This HELOC Repayment Calculator shows what it takes to pay off your balance. Enter your current balance, your APR, and how many years you want to take. The calculator gives you your monthly payment, the total interest you will pay, your total cost, and your payoff date. If you are still deciding how much to draw in the first place, start with the HELOC Calculator or check your available equity with the Home Equity Calculator.
You can pick two payment modes. Traditional pays principal plus interest, so the balance reaches zero by the end of your term. Interest-only pays just the interest charge, so the full balance is still owed later. Our Interest Only Calculator covers that payment style in more detail.
You can also add extra monthly principal, add an annual lender fee, and test low and high rates. The results include a full amortization schedule, charts of your falling balance, and a principal vs. interest breakdown, plus the math shown step by step.
How to use our HELOC Repayment Calculator
Enter your HELOC balance, rate, and how fast you want to pay it off. The calculator shows your monthly payment, total interest, total cost, payoff date, a full amortization schedule, and charts.
Current HELOC Balance: Type the amount you still owe today. Use your latest statement, not your credit line limit.
Current APR (%): Type the rate you pay right now. HELOC rates change, so this is a snapshot at today's rate. If your statement lists fees separately, the APR Calculator can help you find your true all-in rate.
Desired Payoff Timeframe (Years): Type or drag the slider to pick how many years you want to take to clear the balance. You can choose 1 to 30 years, in half-year steps.
Payment Mode: Pick "Traditional" to pay principal plus interest and reach a $0 balance. Pick "Interest-Only" to pay just the interest, which leaves the full balance owed at the end.
Additional Monthly Principal Payment: Add any extra dollars you plan to pay each month. Extra payments cut your interest and pay the loan off sooner. Leave it at $0 if you pay nothing extra. See how the same idea works on other debts with the Extra Payment Calculator.
Annual Lender Fee: Enter any yearly fee your lender charges, like a maintenance or membership fee. It gets added to your total cost. Use $0 if you have none.
Stress-Test APR — Low (%): Enter a lower rate to see how a rate drop would change your payment and interest.
Stress-Test APR — High (%): Enter a higher rate to see the cost if your rate goes up. This matters because most HELOCs have variable rates.
Click Calculate to see your results, or Reset to start over with the default numbers.
What Is a HELOC?
A HELOC is a Home Equity Line of Credit. It is a loan that uses your home as collateral. Instead of getting one lump sum, you get a credit line you can borrow from, like a credit card. The amount you can borrow is based on your home equity — your home's value minus what you still owe on your mortgage. Lenders size the line using your loan-to-value ratio, which you can check with the LTV Calculator, and your debt-to-income ratio. If you would rather take one lump sum at a fixed rate, compare with the Home Equity Loan Calculator.
How HELOC Repayment Works
A HELOC has two stages:
- Draw period (usually 5–10 years): You can borrow money. Most lenders only ask for interest payments during this time. Your balance does not go down.
- Repayment period (usually 10–20 years): You can no longer borrow. Now you pay back principal and interest, so your monthly payment often jumps a lot.
That jump is called payment shock. Many people are surprised by it. Planning your payoff early helps you avoid it.
Interest-Only vs. Traditional Payments
Interest-only payments cover just the interest charge each month. They are small, but you still owe the full balance at the end. Traditional payments (also called amortizing payments) cover interest plus part of the principal, so the balance drops to zero by your chosen date. The same trade-off shows up on first mortgages — see the Interest Only Mortgage Calculator.
How the Monthly Payment Is Found
Interest is charged monthly. First, the yearly APR is split into a monthly rate by dividing by 12. Then the standard loan payment formula spreads the balance over the number of months you pick:
M = P × [ r(1 + r)n ] ÷ [ (1 + r)n − 1 ]
Here, P is your balance, r is the monthly rate, and n is the number of months. For interest-only, the math is simpler: M = P × r. This is the same formula behind our Loan Payment Calculator and Mortgage Calculator.
Why HELOC Rates Change
Most HELOCs have a variable rate. The rate is tied to an index, usually the prime rate, plus a margin set by your lender. When the prime rate moves, your HELOC rate and payment move too. This is why testing a low rate and a high rate matters. A rate rise of just 2% can add thousands of dollars in interest on a big balance — you can see the raw interest impact with the Loan Interest Calculator.
Ways to Pay Off a HELOC Faster
- Pay extra principal each month. Even $50 or $100 extra cuts months off your payoff and saves real interest money. The Early Payoff Calculator shows the time saved.
- Pick a shorter term. Payments are higher, but total interest is much lower.
- Stop drawing on the line. New draws reset your progress.
- Refinance to a fixed rate if rates are rising and you want a steady payment. Run the numbers with the Refinance Calculator or the Cash Out Refinance Calculator.
- Attack your highest-rate debt first. If the HELOC is one of several balances, the Debt Avalanche Calculator and Debt Snowball Calculator help you order your payoffs, and the Debt Consolidation Calculator compares rolling them together.
Costs to Watch For
Some lenders charge an annual fee or membership fee just to keep the line open. Others charge an early closing fee if you pay off and close the line in the first few years. These costs are small each year but add up over a long payoff. Always check your statement or loan agreement. If you are opening a new line, the Closing Cost Calculator covers the upfront side.
The Big Risk
Your home secures a HELOC. If you cannot make the payments, the lender can foreclose. That makes a HELOC cheaper than a credit card — compare with the Credit Card Payoff Calculator — but riskier. Only borrow what you are confident you can repay, check the room in your monthly budget, and know your payoff date before the repayment period starts.