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HELOC (Home Equity Line of Credit) Calculator

Usually 75% to 85%

Your HELOC Estimate

Total Available Equity (at Max LTV): $0.00
Maximum HELOC Credit Line: $0.00
Estimated Monthly Interest-Only Payment: $0.00

*Note: This is an estimate. Lenders also consider credit score, income, and debt-to-income ratios.


Understanding Home Equity Lines of Credit (HELOC)

A Home Equity Line of Credit (HELOC) is a revolving line of credit, much like a credit card, secured by your home. It allows you to borrow against the equity you've built in your property, providing a flexible way to fund home improvements, debt consolidation, or emergency expenses.

How is HELOC Borrowing Power Calculated?

Lenders typically allow you to borrow up to a certain percentage of your home's total value, known as the Loan-to-Value (LTV) limit. The calculation follows this formula:

Maximum HELOC = (Home Value × Max LTV %) – Current Mortgage Balance

Realistic Example

Imagine your home is currently worth $500,000. You still owe $300,000 on your primary mortgage. If a lender offers an 80% LTV limit, here is how they determine your credit line:

  1. $500,000 (Value) × 0.80 (LTV) = $400,000 total borrowing limit.
  2. $400,000 – $300,000 (Existing Debt) = $100,000 HELOC limit.

Draw Period vs. Repayment Period

Most HELOCs consist of two phases:

  • Draw Period (Usually 10 years): You can borrow money as needed and typically make interest-only payments.
  • Repayment Period (Usually 20 years): You can no longer withdraw funds, and you must pay back both principal and interest, which significantly increases your monthly payment.

Key Benefits of a HELOC

  • Flexibility: Only borrow what you need, when you need it.
  • Lower Interest Rates: Because it is secured by real estate, rates are usually much lower than credit cards or personal loans.
  • Tax Deductibility: In some cases, interest may be tax-deductible if used for home improvements (consult a tax advisor).
function calculateHELOC() { var homeValue = parseFloat(document.getElementById('homeValue').value); var mortgageBalance = parseFloat(document.getElementById('mortgageBalance').value); var ltvLimit = parseFloat(document.getElementById('ltvLimit').value) / 100; var apr = parseFloat(document.getElementById('interestRate').value) / 100; if (isNaN(homeValue) || isNaN(mortgageBalance) || isNaN(ltvLimit) || isNaN(apr)) { alert("Please enter valid numerical values."); return; } // Calculation logic var totalEquityCap = homeValue * ltvLimit; var maxHELOC = totalEquityCap – mortgageBalance; if (maxHELOC < 0) { maxHELOC = 0; } // Monthly Interest Only Payment Logic var monthlyIntOnly = (maxHELOC * apr) / 12; // Formatting for display var formatter = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD', }); document.getElementById('totalEquity').innerText = formatter.format(totalEquityCap); document.getElementById('maxCreditLine').innerText = formatter.format(maxHELOC); document.getElementById('monthlyPayment').innerText = formatter.format(monthlyIntOnly); // Show results document.getElementById('heloc-results').style.display = 'block'; }

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