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HELOC Calculator
What will my HELOC payment be during draw and repayment?
Plan your Home Equity Line of Credit payments.
Project HELOC Payment Shock Before It Happens
Model interest-only draw payments and principal-plus-interest repayment phases to understand affordability over time.
Use this for
- Comparing HELOC structures before applying
- Estimating payment jump at repayment start
- Stress-testing variable-rate borrowing
You will get
- Draw-phase monthly payment
- Repayment-phase monthly payment
- Timeline chart of payment changes
Quick Result
Estimated repayment-phase payment
$260.35
Draw phase: $212.50
Based on
- • Credit line: $50,000.00
- • Current balance: $30,000.00
- • Rate and phases: 8.5% | 10y draw + 20y repay
Line Details
Draw Phase Payment
$212.50
Interest Only • Years 1-10
Repayment Phase Payment
$260.35
P+I • Years 11-30
Payment Jump Visualization
Payments jump significantly when the repayment phase begins.
This tool is for illustrative purposes only and does not constitute professional financial, tax, or legal advice. Calculations are estimates and may not reflect real-world variables or local regulations. Always consult with a qualified professional before making financial decisions.
Methodology and Trust
Formulas
Monthly rate
r = annualRate / 100 / 12
Draw payment
drawPayment = balance × r (interest-only)
Repayment payment
payment = B×r×(1+r)^n / ((1+r)^n - 1)
Repayment balance update
nextBalance = currentBalance - (payment - interest)
Recommended Next Steps
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The Strategic HELOC Guide: Liquidity on Demand (2026)
Key Insights & Concepts
A Home Equity Line of Credit (HELOC) is the most powerful liquidity tool available to homeowners, essentially functioning as a giant secure credit card tied to your house. In 2026, smart homeowners use HELOCs not just for renovations, but as a strategic financial buffer to avoid selling assets during market downturns.
Warning: The Variable Rate Trap
Unlike your primary mortgage, HELOC rates are almost always variable (tied to the Prime Rate). If the Fed raises rates, your HELOC payment increases immediately. Always budget for a 2-3% rate hike when calculating affordability.
1The "Payment Shock" Lifecycle
The most dangerous feature of a HELOC is its two-phase structure. Understanding this transition is critical to avoiding foreclosure risk.
Phase 1: The Draw Period
Duration: Typically 10 years.
Payment: Interest-Only.
Behavior: You can borrow, pay back, and borrow again. Payments are deceptively low (e.g., $300/mo on $50k). This creates a false sense of security.
Phase 2: The Repayment Period
Duration: Typically 10-20 Years.
Payment: Principal + Interest.
Behavior: The line freezes. You cannot borrow anymore. Your payment often triples overnight because you must now pay back the full principal balance in a compressed timeframe.
Advanced HELOC Strategies
- The "Recession Buffer": Open a HELOC when you have a job and high credit, even if you don't need it ($0 balance costs $0). If you lose your job during a recession, you have instant access to $50k-$100k of liquidity to pay bills without selling stocks at a loss.
- The "BRRRR" Bridge: Real estate investors use HELOCs to buy a rental property in cash (making their offer stronger), fix it up, and then refinance the rental property to pay off the HELOC.
- Debt Consolidation: HELOC rates (8-9%) are much lower than credit cards (24%). Moving $20k of card debt to a HELOC can save $3k/year in interest, BUT it turns unsecured debt into debt secured by your house. If you default, you lose the house.
Tax Deductibility Rule (2026)
Myth: "HELOC interest is tax-deductible."
Reality: Under current tax law, interest is ONLY deductible if the funds are used to "buy, build, or substantially improve" the home securing the loan. If you use the HELOC to pay off credit cards or buy a car, the interest is NOT deductible. Keep receipts for all home improvements.