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How much can I borrow with a HELOC?

Calculate your home equity line of credit amount, monthly payments, and interest costs based on your home value and existing mortgage.

What This Calculator Is

A HELOC (Home Equity Line of Credit) calculator determines how much equity you can access from your home and what payments would look like on borrowed amounts. HELOCs offer flexible borrowing against your home's value, typically at lower rates than credit cards or personal loans, but your home serves as collateral.

Who This Calculator Is For

Homeowners considering tapping their equity for renovations, debt consolidation, or major expenses. It's valuable for those comparing HELOC to other borrowing options, people planning home improvements, and anyone curious about their available equity.

When to Use This Calculator

Use this calculator when planning home improvements, considering debt consolidation, evaluating emergency funding options, or exploring whether a HELOC fits your financial strategy. Always understand the risks—your home secures this debt—before proceeding.

Inputs

$500,000.00
$250,000.00
80.000%
8.500%
$50,000.00
10

Results

Maximum Borrowable

$150,000.00

Available Equity$250,000.00
Monthly Payment$619.93
Total Interest Cost$24,391.41

Savings, if any, vary based on consumer credit profile, interest rate availability, and other factors.

Insights

Your equity access

You can access up to $250,000.00 through a HELOC, with monthly payments of $619.93 on your draw.

Best uses

HELOCs work well for home improvements or debt consolidation. Avoid using for discretionary spending.

Default rates: Federal Reserve Economic Data (FRED), Freddie Mac Primary Mortgage Market Survey

How HELOC Is Calculated

Lenders typically allow you to borrow up to 80-85% of your home's value minus your mortgage balance. HELOCs have a draw period (usually 10 years) when you can borrow, followed by a repayment period. Interest rates are usually variable.

availableEquity = homeValue - mortgageBalance.
maxBorrowable = max(0, homeValue*ltvLimit/100 - mortgageBalance).
actualDraw = min(drawAmount, maxBorrowable).
monthlyPayment = actualDraw * monthlyRate*(1+monthlyRate)^n / ((1+monthlyRate)^n - 1), monthlyRate = helocRate/100/12, n = repaymentYears*12 (straight-line draw/n if rate=0).
totalInterest = monthlyPayment*n - actualDraw.
Where: homeValue, mortgageBalance, ltvLimit (%), helocRate (annual %), drawAmount, repaymentYears.
Assumptions: single lump-sum draw at closing, fully amortized like a fixed-rate loan (no draw period / interest-only phase modeled); monthly compounding; draw capped at available LTV-based equity.

Key Takeaways

  • •Variable rates mean your payment can increase significantly if rates rise
  • •Only borrow what you need — available credit isn't free money
  • •HELOCs often have annual fees and closing costs
  • •Interest may be tax-deductible if used for home improvements (consult a tax advisor)
  • •Consider a fixed-rate HELOC option if you want payment certainty

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