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What Is a HELOC and How Does It Work?

A Home Equity Line of Credit (HELOC) is a revolving line of credit secured by your home’s equity — the difference between what your home is worth and what you owe on your mortgage. Think of it like a credit card, but with rates dramatically lower because your home backs the loan.

Most HELOCs have two phases: a draw period (typically 10 years) where you can borrow up to your credit limit and make interest-only payments, followed by a repayment period (usually 10–20 years) where you pay both principal and interest.

During the draw period, you only owe interest on what you’ve actually borrowed — not the full credit line. This keeps monthly payments low and flexible.

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How to Calculate a Monthly Interest-Only HELOC Payment

The formula is straightforward. Your interest-only payment depends on three variables: the amount you’ve drawn, your annual interest rate, and the number of days in the billing period.

HELOC Interest-Only Payment Examples

Balance Drawn	Rate (APR)	Monthly Payment	Annual Cost
$10,000	8.50%	$70.83	$850
$25,000	8.50%	$177.08	$2,125
$50,000	8.50%	$354.17	$4,250
$75,000	8.50%	$531.25	$6,375
$100,000	8.50%	$708.33	$8,500

Your Personal HELOC Calculator

Use the simple formula above with your own numbers. Here are a few quick examples to find your payment:

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Use a HELOC to Pay Off High-Rate Credit Card Debt

One of the most powerful ways to use a HELOC is to consolidate high-interest credit card debt. The average credit card APR hovers around 20–25%, while most HELOCs offer rates in the 7–10% range — a potential savings of 10+ percentage points.

Real Savings Example: $20,000 in Credit Card Debt

If you owe $20,000 on credit cards at 22% APR and transfer it to a HELOC at 8.5% APR, here’s the monthly interest-only cost comparison:

Debt Type	Balance	APR	Monthly Interest	Annual Interest
✅ HELOC	$20,000	8.5%	$142/mo	$1,700
❌ Credit Card	$20,000	22%	$367/mo	$4,400
💰 Your Savings	—	—	$225/mo	$2,700/yr

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Fund Home Improvements With Your HELOC

A HELOC is one of the most popular financing tools for home renovations — and for good reason. You borrow only what you need, as you need it, and invest it back into the asset securing the loan: your home.

Potential Tax Advantage

When HELOC funds are used to “buy, build, or substantially improve” your primary or secondary home, the interest may be tax-deductible (up to IRS limits). Always consult a qualified tax advisor to confirm eligibility based on your situation.

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Frequently Asked Questions About HELOCs

What credit score do I need for a HELOC?

Most lenders require a minimum credit score of 620–640, but the best rates typically go to borrowers with scores of 720 or higher. A higher score means lower interest and better terms.

Are HELOC interest rates fixed or variable?

Most HELOCs have variable rates tied to the Prime Rate. Some lenders offer a fixed-rate lock option, letting you convert a portion of your balance to a fixed rate for more predictable payments.

How much equity do I need to qualify?

Lenders typically allow you to borrow up to 80–85% of your home’s appraised value, minus your existing mortgage balance. Most require you to retain at least 15–20% equity after the HELOC.

What happens when the draw period ends?

After the draw period (usually 10 years), the repayment period begins. You can no longer draw funds and must repay principal plus interest, which will increase your monthly payment significantly.

Is a HELOC better than a cash-out refinance?

It depends on your goals. A HELOC is more flexible for ongoing needs (like a remodel with phases), while a cash-out refi gives you a lump sum at a fixed rate. Compare closing costs and your current mortgage rate before deciding.

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