What Is a HELOC? How It Works, Rates, and When to Use One
A HELOC (Home Equity Line of Credit) lets you borrow against your home's equity at a variable rate, typically up to 85% of home value minus your mortgage balance. Here is how draws, repayments, and rate resets work.
Want to run your own numbers? Open the interactive Mortgage Payment Estimator as you read — Mortgage Calculator.
A HELOC (Home Equity Line of Credit) is a revolving credit line secured by your home equity, typically at a variable interest rate. You have a draw period (usually 5–10 years) during which you can borrow up to your limit and repay freely, followed by a repayment period (10–20 years) to pay down the balance. Most lenders allow borrowing up to 85% of your home's combined loan-to-value — on a $500,000 home with a $300,000 mortgage, that is a potential $125,000 HELOC limit.
What is a HELOC
- Calculate your available equity — HELOC limit = (home value × 0.85) − mortgage balance. At $500,000 home and $300,000 balance: ($500,000 × 0.85) − $300,000 = $125,000 maximum.
- Understand the draw period — during the draw period (typically 5–10 years), you can borrow any amount up to your limit, repay it, and borrow again. Many lenders require interest-only payments during this phase.
- Know the repayment period — after the draw period ends, you can no longer borrow. The outstanding balance converts to a repayment schedule (typically 10–20 years) with principal and interest payments.
- Account for the variable rate — most HELOCs are tied to the Prime Rate. When the Fed raises rates, your HELOC payment increases. In a rising rate environment, this can significantly impact your payment.
HELOC vs home equity loan vs cash-out refinance
| Feature | HELOC | Home equity loan | Cash-out refinance |
|---|---|---|---|
| Rate type | Variable (usually) | Fixed | Fixed or ARM |
| Disbursement | Revolving line — draw as needed | Lump sum | Lump sum |
| Existing mortgage | Preserved | Preserved | Replaced |
| Best when | Ongoing projects, uncertain amount needed | One-time expense, fixed cost | Current mortgage rate is close to market |
| Risk | Rate increases; home as collateral | Fixed payment; home as collateral | Resets to new rate on entire mortgage |
| Closing costs | Low ($0–$500 typically) | Moderate ($500–$2,000) | High (2–3% of new loan) |
The HELOC's key advantage over a cash-out refinance is that it preserves your existing mortgage rate. If you have a 3.5% fixed mortgage, a cash-out refi at today's 7% rate would increase your interest cost on the entire balance — often adding $800–$1,500/month on a $400,000 loan. A HELOC only costs you interest on what you actually draw.
HELOC interest rate: how it works in 2025–2026
Most HELOCs are priced at Prime Rate + a margin (0% to +2%). In 2025, the Federal Reserve's federal funds rate target drove Prime Rate to approximately 7.5%. HELOC rates typically range from 7.5% to 9.5% for well-qualified borrowers.
- Draw period payment: interest-only on amount drawn. At 8% on $50,000 drawn: $333/month interest only.
- If rate rises 2%: same $50,000 at 10% = $417/month — a $84/month increase. On $100,000 drawn: $167/month increase.
- Repayment period payment: when draw period ends, amortise remaining balance over 10–20 years. On $75,000 balance at 8% over 15 years: approximately $716/month — a significant jump from interest-only.
The most common financial shock with HELOCs is the draw-to-repayment transition: payments can double or triple when principal repayment begins. Budget for this transition well in advance.
Common HELOC uses: which make sense
| Use case | Makes sense? | Why |
|---|---|---|
| Home improvements | Usually yes | Adds value to collateral; interest potentially tax-deductible |
| Emergency fund buffer | Yes (with caution) | Low-cost line if not drawn; home is at risk if emergency is large |
| Debt consolidation (high-rate credit cards) | Sometimes | HELOC rate (8%) vs credit card (20%) saves interest — but converts unsecured debt to home-secured |
| College tuition | Consider carefully | Student loans have income-based repayment; HELOC default risks your home |
| Vacation / lifestyle spending | No | Depreciating or consumable purchases do not grow in value — home equity should not fund them |
| Investment property down payment | Experienced investors only | Leverage amplifies both gains and losses; two debt payments if income falls |
Free Calculator
See the opportunity cost of your HELOC — no signup
Calculate the true cost of borrowing against your equity including rate risk, closing costs, and the opportunity cost vs keeping equity in the home.
Authoritative sources
- Consumer Financial Protection Bureau — What Is a HELOC? — CFPB explanation of HELOC draw and repayment periods, variable rate risks, and the key disclosures lenders must provide before opening a HELOC.
- IRS — Topic No. 505: Interest Expense — IRS guidance on when HELOC interest is deductible: only when proceeds are used to buy, build, or substantially improve the home securing the loan.
Key takeaways
- A HELOC is a revolving line of credit secured by home equity, typically at a variable rate. Draw period (5–10 years) lets you borrow and repay freely; repayment period (10–20 years) amortises the remaining balance.
- Maximum HELOC limit = (home value × 85% CLTV) − current mortgage balance. You must retain at least 15% equity after drawing.
- The biggest risk is the draw-to-repayment transition: payments can double or triple when the interest-only draw period ends and principal repayment begins.
- HELOC preserves your existing mortgage rate — the primary advantage over a cash-out refinance if you have a low existing rate. Cash-out refinance replaces your entire mortgage at the current market rate.
- HELOC interest is only tax-deductible when funds are used to buy, build, or substantially improve the home. Debt consolidation or lifestyle spending does not qualify for the deduction.
- Understanding how equity accumulates helps you know when you have enough to make a HELOC worthwhile. The home equity calculation guide shows the math for estimating your available equity and the 85% CLTV limit before approaching a lender.
Frequently asked questions
How does a HELOC work?
A HELOC is a revolving credit line secured by your home equity, typically at a variable interest rate. You have a draw period (usually 5–10 years) during which you can borrow and repay freely, followed by a repayment period (10–20 years). During the draw period, payments are often interest-only. After the draw period ends, the balance is repaid in full over the repayment period.
What is the typical HELOC interest rate?
HELOC rates are typically variable and tied to the Prime Rate (which follows the federal funds rate). In 2025, HELOCs are generally available at Prime + 0% to Prime + 2%, putting rates in the 7.5–10% range for qualified borrowers. Rates rise and fall with Fed policy. Fixed-rate HELOC options exist but are less common and often carry a rate premium.
How much can I borrow with a HELOC?
HELOC limits are set at up to 85% of the home's combined loan-to-value (CLTV) for most lenders. If your home is worth $500,000 and you owe $300,000 (60% LTV), a lender at 85% CLTV would allow a HELOC limit of $125,000 ($500,000 × 0.85 − $300,000). Higher credit scores and stronger payment history may qualify you for higher CLTV ratios.
What is a HELOC used for?
HELOCs are commonly used for home improvements (interest may be tax-deductible), debt consolidation (replacing high-rate debt with lower HELOC rate), major expenses like tuition or medical bills, and as an emergency liquidity source for homeowners. Using a HELOC to fund investments is more risky — if the investment underperforms, the home is still collateral.
Is a HELOC safer than a cash-out refinance?
A HELOC preserves your existing mortgage rate, which matters most if you have a low fixed rate (2–4%) that you do not want to replace. A cash-out refinance replaces your entire mortgage at the current rate — if rates have risen significantly from your original mortgage, you would pay the higher rate on the full balance. The HELOC is also more flexible: you borrow only what you need, not a fixed lump sum.
Free tool
Try the Mortgage Calculator
Use our free mortgage calculator to calculate results instantly — no signup required.
Open Mortgage Calculator →Educational content only — not financial advice
The content published on Garypedia is provided solely for informational and educational purposes. It does not represent, and should not be interpreted as, financial, investment, tax, accounting, or legal advice of any kind. While reasonable care is taken to ensure the accuracy of figures, formulas, and data sources referenced, no warranty — express or implied — is made as to their completeness or suitability for any particular purpose. Garypedia, its operators, and contributors expressly disclaim all liability for any loss, damage, or adverse outcome — whether direct, indirect, or consequential — arising from reliance on material published on this site. All examples are illustrative only. Individual circumstances vary significantly; you should independently verify any information and seek guidance from a suitably qualified and regulated financial, tax, or legal professional before making any financial decision.