A home equity line of credit (HELOC) lets you borrow against the equity in your home — up to a set limit — as needed, rather than taking a lump sum all at once. It works more like a credit card than a traditional loan: you draw what you need, pay it down, draw again. The collateral is your home.
The Two Phases of a HELOC
Draw period (typically 5–10 years): You can borrow up to your credit limit as needed. Repayments during this period are usually interest-only, though you can pay principal voluntarily. The balance rises and falls as you draw and repay.
Repayment period (typically 10–20 years): The draw period ends and you can no longer borrow. The outstanding balance converts to a fixed repayment schedule — typically principal plus interest — usually at a higher monthly payment than during the draw period.
This structure creates a risk that surprises some borrowers: if you carry a large balance into repayment, the jump in monthly obligation can be significant.
Variable Interest Rate
Almost all HELOCs have variable interest rates tied to the Prime Rate plus a lender-determined margin. When the Federal Reserve raises or lowers the federal funds rate, Prime Rate moves with it, and your HELOC rate adjusts accordingly.
This means:
- Your interest cost is unpredictable over the draw and repayment periods
- In a rising-rate environment, your payment increases without warning
- Some lenders offer rate caps or fixed-rate conversion options, but these vary
How Much Can You Borrow?
Lenders typically allow borrowing up to 80%–85% of your home’s value, less your outstanding mortgage balance. This is called the combined loan-to-value (CLTV) limit.
Example:
- Home value: $500,000
- Outstanding mortgage: $320,000
- Maximum CLTV at 80%: $400,000
- Available HELOC: $400,000 − $320,000 = $80,000
Your actual approval also depends on your credit score, debt-to-income ratio, and income documentation.
Common Uses for a HELOC
Home improvements: The most common use. Interest paid on a HELOC used to substantially improve your home may be tax-deductible — consult a tax advisor for your specific situation.
Emergency fund buffer: Some homeowners open a HELOC as a backup for large unexpected expenses, even if they don’t draw on it immediately. Note that lenders can freeze or reduce a HELOC during economic downturns if your home value declines.
Debt consolidation: Consolidating high-interest credit card debt into a lower-rate HELOC can reduce your interest costs — but converts unsecured debt to debt secured by your home. If you default, the consequence is foreclosure, not just damaged credit.
Education or business expenses: Using home equity for college tuition or business investment carries significant risk — the home is collateral.
HELOC vs. Cash-Out Refinance vs. Home Equity Loan
These are the three main ways to access home equity:
| HELOC | Home equity loan | Cash-out refinance | |
|---|---|---|---|
| Disbursement | Draw as needed | Lump sum | Lump sum |
| Rate | Variable | Fixed | Fixed |
| Replaces first mortgage? | No | No | Yes |
| Best for | Ongoing needs | One-time expense | Rate + equity access together |
If your first mortgage has a low rate you’d rather keep, a HELOC or home equity loan preserves it while adding a second lien. A cash-out refinance pays off the first mortgage entirely and replaces it — making sense only if the new rate is competitive.
The Key Risks
Payment shock at repayment. If you’ve borrowed heavily during the draw period and made only interest payments, the shift to principal + interest in repayment can be a significant jump. Model this before drawing.
Variable rate risk. A HELOC opened with a low rate may become expensive if rates rise during the draw period. Consider whether a fixed-rate home equity loan is more appropriate for your needs.
Lender freeze risk. During economic downturns, lenders have historically frozen or reduced HELOC credit lines — particularly if home values in your area decline. Don’t structure your finances around HELOC availability as a primary emergency buffer.
Use the HELOC Calculator on LendingPulse to model available credit, interest costs during the draw period, and the estimated payment at various scenarios for the repayment period.