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Mortgage, loan, investing, tax, and money calculators.
HELOC Utilization Calculator
HELOC utilization shapes payment, interest cost, and credit impact.
Utilization
0.6%
Monthly interest
$390
Available credit
$45,000
How the math works
Utilization = drawn ÷ limit. Monthly interest = balance × rate / 12.
$55k / $100k = 55% utilization. $55k × 8.5% / 12 = $389.58 monthly interest. $45k available.
How to Use
- Enter credit line limit.
- Enter current drawn balance.
- Enter interest rate %.
- Enter min payment %.
- Enter draw period months.
- Read utilization + interest.
Frequently Asked Questions
What's HELOC utilization?
Drawn balance ÷ credit limit. Typical: 20-60% during draw period. Over 80% signals stress — credit score impact. Available credit acts as emergency buffer — using it all reduces flexibility. Most homeowners draw gradually over 10-year draw period.
Interest during draw?
Interest-only payments typical during 10-year draw period. Rate variable, tied to prime. Balance grows if interest-only and additional draws. Monitor carefully — easy to slip into higher balance without realizing. Payment shock at end of draw (amortization begins).
Credit impact?
Available HELOC counts as revolving credit. Utilization above 30% can lower score 20-50 points. Unused HELOC benefits credit (lower utilization ratio). Draw of 50%+: meaningful negative score impact. Use strategically to preserve credit flexibility.
Tax deduction?
Post-TCJA (2018): interest deductible only if proceeds used for home improvement on primary/secondary residence. Not for debt consolidation, vacation, or other purposes. Limited to $750k combined mortgage + HELOC. Many HELOC users unaware; claim incorrectly. Consult tax advisor.
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