A home equity line of credit, or HELOC, lets you borrow against the equity you have built in your home — up to a set credit limit — and repay only what you draw. It works like a credit card secured by your house: you have access to a revolving line of credit, draw funds as needed, and pay interest only on the amount borrowed. HELOCs are commonly used for home renovations, debt consolidation, education expenses, or as a financial backstop for large unexpected costs.
How a HELOC Works
A HELOC has two phases:
- Draw period (typically 5–10 years): You can borrow against the line of credit, make purchases, repay funds, and borrow again — just like a credit card. During the draw period, most HELOCs require interest-only payments on the outstanding balance. Some lenders allow principal payments as well.
- Repayment period (typically 10–20 years): Once the draw period ends, you can no longer borrow. Your balance is converted to a repayment schedule — principal and interest payments — until the loan is paid off. Monthly payments during repayment are typically higher than draw-period payments, which can come as a shock if you are unprepared.
How Much Can You Borrow with a HELOC?
Lenders typically allow you to borrow up to 80%–90% of your home’s appraised value, minus your existing mortgage balance. This is expressed as combined loan-to-value ratio (CLTV).
Example: Your home is worth $500,000. Your remaining mortgage balance is $300,000.
- At 85% CLTV: Maximum combined debt = $500,000 × 0.85 = $425,000
- Available HELOC credit = $425,000 − $300,000 = $125,000
Your actual credit limit depends on your income, credit score, and debt-to-income ratio, not just the equity calculation.
HELOC Interest Rates
Most HELOCs carry variable interest rates tied to the prime rate (which is itself tied to the Federal Reserve’s benchmark rate) plus a margin set by the lender. In 2026, the prime rate and HELOC margins produce variable rates that fluctuate with Fed rate decisions.
Key implications of variable rates:
- Your monthly payment can increase if the prime rate rises.
- If rates are high when you open the HELOC, drawing the full line locks in a higher rate for drawn balances.
- Some lenders offer a fixed-rate conversion option — locking a portion or all of the drawn balance at a fixed rate. This provides payment certainty but may carry a higher rate than the current variable rate.
Compare the APR, not just the initial rate, when shopping for HELOCs. Also compare the index (usually prime rate) and the margin — a smaller margin means your rate will be lower when the same prime rate applies.
HELOC vs. Home Equity Loan
Both products let you borrow against home equity. The difference is structure:
- HELOC: Revolving line of credit, variable rate (usually), borrow what you need when you need it. Better for ongoing projects or uncertain costs.
- Home equity loan: Lump-sum disbursement, fixed rate, fixed monthly payment. Better for a single known expense — a specific renovation, debt consolidation, or large purchase with a defined cost.
If you need $30,000 all at once for a kitchen renovation, a home equity loan’s fixed rate and predictable payment may be preferable. If you are managing a multi-phase renovation over 18 months with uncertain costs, a HELOC’s flexibility is more useful.
HELOC vs. Cash-Out Refinance
- Cash-out refinance: Replaces your entire first mortgage with a new, larger loan. Gives you a lump sum. Carries a fixed rate (usually). Refinancing costs (2%–5% of loan amount) apply. Best when you can also improve your existing mortgage rate.
- HELOC: Sits behind your first mortgage as a second lien. Does not affect your existing mortgage rate. Lower closing costs. Variable rate. Better when you want to preserve a low existing first mortgage rate.
If you have a low fixed-rate first mortgage and do not want to refinance it at today’s higher rates, a HELOC lets you access equity without disturbing the first mortgage.
HELOC Costs and Fees
HELOCs typically have lower closing costs than a full mortgage refinance. Common costs include:
- Appraisal fee: $300–$600 (sometimes waived by lenders)
- Application or origination fee: $0–$500 (many lenders waive)
- Annual fee: $50–$100 per year at some lenders
- Early closure fee: Some lenders charge a fee if you close the HELOC within 2–3 years of opening it
Many banks and credit unions offer HELOCs with no closing costs — worth negotiating for, especially with your existing mortgage lender.
Risks of a HELOC
- Your home is collateral. If you cannot repay, the lender can foreclose. Do not use a HELOC for discretionary spending without a clear repayment plan.
- Rate risk. Variable rates can rise significantly over the draw period. Run the numbers at rates 2%–3% higher than today to stress-test your budget.
- Payment shock at end of draw period. If you have been making interest-only payments, the jump to fully amortizing principal-and-interest payments can be significant. Budget for this transition in advance.
- Overborrowing. Easy access to credit can lead to drawing more than needed. Treat HELOC funds like borrowed money with a cost — because they are.
Tax Deductibility of HELOC Interest
HELOC interest is deductible on federal taxes only if the funds are used to buy, build, or substantially improve the home that secures the loan. If you use a HELOC for debt consolidation, education, or other non-home expenses, the interest is generally not deductible. Consult a tax professional to confirm deductibility for your specific situation.
Bottom Line
A HELOC is a flexible, cost-effective way to access the equity in your home — particularly useful for home improvement projects, large variable expenses, or as an emergency backstop. The variable rate and revolving structure require discipline. Used wisely, a HELOC can be a powerful financial tool at a lower rate than personal loans or credit cards. Used carelessly, it can put your home at risk.