Per Diem Interest Rate Calculator

HELOC Maximum Borrowing Power Calculator

Your HELOC Estimate

Total Home Equity: $0.00

Maximum Combined Loan Amount: $0.00


Estimated Max HELOC Limit: $0.00

function calculateHELOC() { var homeValue = parseFloat(document.getElementById("homeValue").value); var mortgageBalance = parseFloat(document.getElementById("mortgageBalance").value); var ltvLimit = parseFloat(document.getElementById("ltvLimit").value); if (isNaN(homeValue) || isNaN(mortgageBalance) || isNaN(ltvLimit)) { alert("Please enter valid numbers for all fields."); return; } var totalEquity = homeValue – mortgageBalance; var maxCombined = homeValue * (ltvLimit / 100); var maxHELOC = maxCombined – mortgageBalance; if (maxHELOC < 0) { maxHELOC = 0; } document.getElementById("totalEquity").innerText = "$" + totalEquity.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("maxCombined").innerText = "$" + maxCombined.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("maxHELOC").innerText = "$" + maxHELOC.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); document.getElementById("resultDisplay").style.display = "block"; }

Understanding Your HELOC Maximum Limit

A Home Equity Line of Credit (HELOC) is a revolving line of credit that uses your home as collateral. Unlike a traditional home equity loan, which provides a lump sum, a HELOC allows you to borrow as needed up to a specific limit, much like a credit card.

The 80% LTV Rule

Most lenders use a Loan-to-Value (LTV) ratio to determine your borrowing power. Typically, lenders allow for a combined LTV (CLTV) of up to 80%. This means the total of your existing mortgage plus your new HELOC cannot exceed 80% of your home's current appraised market value.

Example Calculation

If your home is worth $500,000 and you still owe $300,000 on your primary mortgage:

  • 1. Determine the LTV Cap: $500,000 × 0.80 = $400,000.
  • 2. Subtract Current Mortgage: $400,000 – $300,000 = $100,000.
  • Maximum HELOC Amount: $100,000.

Factors That Affect Your Eligibility

While equity is the primary factor, lenders also evaluate the following before approving a line of credit:

  • Credit Score: A higher score (usually 700+) secures better interest rates and higher LTV limits.
  • Debt-to-Income (DTI) Ratio: Lenders prefer a DTI below 43% to ensure you can manage the monthly payments.
  • Appraisal: A professional appraisal will be required to verify the current market value of your property.
Home Value Mortgage Balance 80% LTV Limit Est. HELOC
$350,000 $200,000 $280,000 $80,000
$600,000 $400,000 $480,000 $80,000
$800,000 $450,000 $640,000 $190,000

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