HELOC Calculator

Calculate your HELOC monthly payments, interest, and payoff timeline. Free home equity line of credit calculator with draw and repayment periods.

Did this calculator help you?

What is HELOC Calculator?

A HELOC (Home Equity Line of Credit) calculator helps you estimate the monthly payments and total cost of a home equity line of credit. Unlike a traditional home equity loan that provides a lump sum, a HELOC works like a credit card secured by your home — you can borrow as needed up to your credit limit during the draw period, then repay over the repayment period. This calculator models both the draw period (interest-only payments) and the repayment period (principal + interest amortization). It shows your monthly payment, total interest, and a year-by-year breakdown so you can understand the full cost of borrowing against your home equity. Key factors affecting your HELOC cost include the interest rate (typically variable, based on prime rate + margin), draw period length (usually 10 years), repayment period (usually 20 years), and closing costs (2-5% of the credit line).

Steps:

Enter the HELOC amount you plan to borrow.
Enter the current interest rate (variable, based on prime + margin).
Enter the total term (draw period + repayment period).
Enter estimated closing costs (typically 2-5% of loan amount).
Enter your home's current value and existing mortgage balance.
Enter the draw period length (typically 10 years).
Review the monthly payment, total interest, and payoff timeline.

Formula

Monthly Payment = P × [r(1+r)^n] / [(1+r)^n - 1] Where P = loan amount, r = monthly interest rate (annual rate ÷ 12), n = total months Draw Period Payment = Loan Amount × Monthly Rate (interest-only) Repayment Period Payment = Amortized over remaining months Total Interest = (Monthly Payment × Total Months) - Loan Amount - Closing Costs

Use Cases

Estimating HELOC payments for home renovations
Planning debt consolidation with a HELOC
Comparing HELOC vs. home equity loan costs
Budgeting for major expenses (education, medical, emergencies)
Understanding the impact of variable rates on payments

Key Benefits

Get accurate HELOC payment estimates instantly
See draw period vs. repayment period costs clearly
Make informed decisions about home equity borrowing
Free on any device no downloads

Pro Tips

Only borrow what you need to minimize interest costs
Make extra principal payments during draw period if possible
Monitor prime rate changes that affect your payment
Consider a fixed-rate HELOC option if available

Common Mistakes to Avoid

Underestimating the payment increase after draw period ends
Borrowing more than needed during the draw period
Ignoring variable rate risk
Not accounting for closing costs

Key Terms Explained

Draw Period: Time when you can borrow (interest-only payments)
Repayment Period: Time to repay principal + interest after draw ends
HELOC: Home Equity Line of Credit
Prime Rate: Base rate for variable HELOCs
LTV: Loan-to-Value ratio

Related Concepts

Home Equity Loan Calculator – Compare lump-sum home equity loans
Mortgage Calculator – Calculate primary mortgage payments
Refinance Calculator – Compare refinance options

Example

You take a $50,000 HELOC at 7.5% on a $400,000 home with a $200,000 mortgage. Draw period: 10 years, repayment: 20 years. During the draw period, you pay interest-only on borrowed amounts. At $50,000 borrowed, monthly payment = $312.50 (interest-only). After 10 years, repayment begins: monthly payment = $404.50 for 20 years. Total interest over 30 years = $97,080. Closing costs of $2,500 bring total cost to $99,580.

Frequently Asked Questions

What is a HELOC?

A Home Equity Line of Credit (HELOC) is a revolving line of credit secured by your home's equity. Unlike a traditional loan, you can borrow up to your credit limit as needed during the draw period, typically 10 years. You only pay interest on what you borrow during the draw period, then enter a repayment period where you pay both principal and interest.

How does the draw period work?

During the draw period (typically 10 years), you can borrow funds up to your credit limit. You usually make interest-only payments on the amount borrowed. After the draw period ends, you can no longer withdraw funds and must repay the balance over the repayment period (typically 20 years).

How is the HELOC interest rate determined?

HELOC rates are typically variable and based on the prime rate plus a margin. The margin depends on your credit score, loan-to-value ratio, and lender. Your rate can change monthly as the prime rate changes.

What are typical HELOC closing costs?

Closing costs for a HELOC usually range from 2% to 5% of the credit line amount. This includes appraisal fees, title search, application fees, and attorney fees. Some lenders offer no-closing-cost HELOCs but may charge a higher interest rate or annual fee.

Can I pay off a HELOC early?

Yes, you can typically pay off a HELOC early without prepayment penalties. However, some lenders charge an early closure fee if you close the account within the first 1-3 years. Check your specific agreement terms.

What happens if I sell my home with a HELOC balance?

The HELOC must be paid off at closing from the sale proceeds. The lender will release the lien once the balance is paid in full. If the sale doesn't cover the HELOC, you'll need to bring cash to closing.

How much can I borrow with a HELOC?

Most lenders allow you to borrow up to 80-85% of your home's value minus your existing mortgage balance. For example, a $300,000 home with a $150,000 mortgage might qualify for a $105,000 HELOC (85% of $300,000 = $255,000 minus $150,000).

What is the difference between a HELOC and a home equity loan?

A home equity loan provides a lump sum with fixed payments and rate. A HELOC is a revolving line of credit with variable rates and flexible borrowing during the draw period. HELOCs offer more flexibility but less payment predictability.

Are HELOC interest payments tax deductible?

HELOC interest may be tax deductible if the funds are used to buy, build, or substantially improve the home securing the line. The deduction is subject to limits and requires itemizing. Consult a tax advisor for your specific situation.

What happens when the draw period ends?

When the draw period ends, you can no longer borrow additional funds. Your payment typically increases as you begin repaying both principal and interest over the remaining repayment period. This is called the repayment or amortization period.