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Tool: HELOC Calculator — 免費線上計算機 | HomeCalcPro | 列印時間:
HELOC Calculator — 免費線上計算機 | HomeCalcPro
HELOC Calculator精準試算，提供行業標準公式與即時測算結果。
Parameters & Values
Computed Financial Summary
Real-timeAdjust parameters to update tax and amortization results.
HELOC Borrowing Capacity & Payment Formulas
Transparent mathematical methodology explained in plain English.
Max HELOC = (Home Value × Max CLTV [85%]) - First Mortgage Balance | Draw Payment = Drawn Balance × (APR / 12)Calculates maximum available credit line based on Combined Loan-to-Value (CLTV) and models interest-only draw period payments followed by 20-year fully amortizing repayment.
Variables Explained:
- Current Home Market Value ($): Estimated appraised value of home.
- First Mortgage Balance ($): Remaining balance on primary mortgage.
- HELOC Drawn Amount ($): Actual funds borrowed from the line of credit.
- HELOC Variable APR %: Prime rate + lender margin.
$600,000 Home Value, $320,000 First Mortgage, $80,000 HELOC Draw at 8.5%
Calculating available borrowing capacity and 10-year draw period interest payment.
- Max Combined Loan Allowed (85% CLTV): $600,000 × 0.85 = $510,000.
- Available HELOC Credit Line: $510,000 - $320,000 = $190,000 max line.
- Draw Period Monthly Interest (8.5% on $80,000): ($80,000 × 0.085) / 12 = $566.67/month.
- Repayment Period Payment (20-year amortization): $694.26/month (Principal + Interest).
常見問題解答 (FAQ): HELOC Calculator
Click any question below to expand quick answers, formulas, and expert tips.
What is the payment shock when a HELOC transitions to the repayment period?
During the 10-year draw period, borrowers only pay interest. When the 20-year repayment phase begins, payments jump significantly because principal amortization is required.
Is HELOC interest tax-deductible?
Under IRS rules, HELOC interest is only tax-deductible if the borrowed funds are used to buy, build, or substantially improve the taxpayer’s home that secures the loan.