A Home Equity Line of Credit (HELOC) lets you borrow against the equity you have built in your home. It works like a credit card — you have a credit limit, draw from it as needed, and only pay interest on what you use. The interest rate is typically much lower than personal loans or credit cards because your home serves as collateral.
How HELOCs Work
HELOCs have two phases: the draw period (usually 10 years) and the repayment period (usually 20 years). During the draw period, you can borrow and repay repeatedly, like a credit card. Most HELOCs charge interest-only during this phase. When the draw period ends, you can no longer borrow, and repayment of principal begins.
- •Maximum HELOC amount: typically 80–85% of home value minus what you still owe on the mortgage
- •Example: Home worth $500,000, mortgage balance $300,000 → $500k x 85% - $300k = $125,000 available
- •Interest rates: variable (tied to prime rate), typically prime + 0–2%
- •Current typical rate range: 8–10% (varies significantly by lender and credit score)
- •Closing costs: $300–$500 typically (less than a home equity loan)
Draw Period vs Repayment Period: Numbers That Matter
During the draw period (typically 10 years), your payment is usually interest-only. On a $50,000 HELOC balance at 9% APR, the interest-only payment is about $375/month. That feels manageable — but nothing is being paid toward principal. When the repayment period begins, you must start paying both principal and interest on the remaining balance, compressed into 20 years. That same $50,000 balance suddenly requires about $450/month, and that payment cannot flex down.
Many homeowners are surprised by the repayment period "payment shock." If you drew heavily on your HELOC during the draw period and only made interest payments, you can owe the original principal in full at the start of the repayment phase. The fix: make principal payments voluntarily during the draw period, even if not required.
HELOC vs Home Equity Loan: Quick Comparison
- •HELOC: revolving credit line, variable rate (prime + margin), draw as needed, interest-only option during draw period — best for unknown costs like renovations
- •Home equity loan: lump sum, fixed rate, fixed payment from day one — best for known costs like a specific project
- •HELOC typically has lower closing costs ($300–500 vs $2,000+ for home equity loan)
- •Home equity loan provides rate certainty — HELOC rate can rise or fall with the prime rate
- •Both use your home as collateral — missing payments risks foreclosure on either product
The variable rate risk of HELOCs is real. When the Fed raised rates from near-zero to 5.5% between 2022 and 2023, HELOC rates jumped from around 4% to 9%+ almost overnight. A borrower with $80,000 drawn saw their monthly interest payment go from $267 to $600. Budget for rate increases when sizing your HELOC draw. Use the HELOC Calculator on CalcVerseAI to model different rate scenarios and see how your payment changes.
HELOC interest was fully tax-deductible until 2018. Under current law (TCJA), it is only deductible if the funds are used to "buy, build, or substantially improve" your home. Using a HELOC to pay for a vacation or consolidate credit card debt = not deductible.
Smart Uses for a HELOC
- •Home renovations that increase value (kitchen remodel, addition, energy upgrades)
- •Emergency fund bridge — open a HELOC while your emergency fund is healthy; use it only in true emergencies
- •Short-term bridge financing for major life events (before a home sale closes)
- •Business investment if you have high-confidence returns (proceed with caution)
Dangerous Uses (Do Not Do These)
- •Paying off credit card debt (transfers unsecured debt to secured — your home is now at risk)
- •Funding lifestyle expenses or vacations
- •Investing in volatile assets (stocks, crypto) — margin calls on your house
- •Using the draw period as an income supplement — this compounds into a crisis at repayment
A HELOC is an excellent tool when used for genuine home improvements or emergencies — and a dangerous one when used to fund consumption. The variable rate means your payment can rise significantly when the Fed hikes. Budget conservatively.
Frequently Asked Questions
How much can I borrow with a HELOC?
Most lenders allow a combined loan-to-value (CLTV) of 80–85%. Formula: (Home value × 85%) minus current mortgage balance = maximum HELOC. On a $400,000 home with a $250,000 mortgage balance: ($400,000 × 85%) - $250,000 = $90,000 available. You also need sufficient income to qualify and typically a credit score of 680+.
Calculate your HELOC amount →What happens at the end of the HELOC draw period?
After the draw period (typically 10 years), the HELOC enters repayment. You can no longer borrow, and you must start repaying principal plus interest over 20 years. If you borrowed $60,000 during the draw period, your repayment-phase payment jumps significantly — many borrowers experience 'payment shock' if they made only interest payments during the draw period. To avoid this, make voluntary principal payments throughout the draw period.
Is HELOC interest tax deductible?
Under current law (since 2018 TCJA), HELOC interest is only deductible if the funds are used to 'buy, build, or substantially improve' the home that secures the loan. Using HELOC funds for home renovation: deductible. Using HELOC funds for a vacation, car purchase, or credit card payoff: not deductible. Keep receipts and documentation of how you used the funds for tax purposes.
What is the difference between a HELOC and a home equity loan?
A HELOC is a revolving credit line with a variable interest rate — you draw and repay flexibly, like a credit card. A home equity loan is a lump-sum loan with a fixed rate and fixed monthly payment from day one. HELOCs are better for variable costs (ongoing renovation). Home equity loans are better for one-time expenses where rate certainty matters. Both use your home as collateral.