Home Equity Loan Calculator

Estimate the monthly payment on a fixed-rate home equity loan, check how much your lender’s CLTV limit lets you borrow, and see total interest and fees.

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Compare borrowing and renovation scenarios

Check construction financing or estimate a renovation project's full costs and potential resale profit.

How a home equity loan works

A home equity loan is a second mortgage paid out as one lump sum at closing. You repay it in equal monthly installments at a fixed rate over a set term, usually 5 to 30 years. That makes it different from a HELOC, which is a revolving line of credit with a variable rate that you draw on as needed. Because the payment never changes, a home equity loan suits one known expense: a renovation with a firm bid, paying off higher-rate debt, or a tuition bill.

The loan is secured by your house and sits behind your first mortgage, so falling behind puts the home at risk. That second-lien position is also why the rate is usually a little higher than a first mortgage rate.

How much you can borrow: the CLTV limit

Lenders cap the combined loan-to-value (CLTV) ratio: every loan secured by the home divided by its appraised value. Most set the limit at 80% or 85%, and a few go to 90% for strong credit. The most you can borrow is:

Max loan = home value × CLTV limit − first mortgage balance

Example: a home appraised at $450,000 with a $250,000 first mortgage and an 85% limit gives 450,000 × 0.85 −250,000 = $132,500. At 80% the same home supports $110,000, and at 90% it supports $155,000. If your first mortgage already exceeds the limit, there is no borrowable equity until the balance falls or the value rises.

Worked example: payment, interest and fees

Borrow $60,000 at a fixed 8.5% for 15 years. The monthly payment is P × i ÷ (1 − (1 + i)−n) with i = 0.085 ÷ 12 and n = 180, which comes to $590.84. Over 180 payments you repay $106,352, so total interest is $46,352.

With $1,500 of closing costs you receive $58,500 but still repay the full $60,000 plus interest. Spreading those fees over the loan raises the effective cost from 8.50% to about 8.93%. Stretching the same loan to 30 years drops the payment to $461.35 but more than doubles the interest, so compare terms in the table before choosing.

Is the interest tax-deductible?

Only sometimes.

Under current IRS rules (Publication 936), interest on a home equity loan is deductible only if you itemize and the money is used to buy, build, or substantially improve the home that secures the loan, and the total mortgage debt stays within the acquisition-debt limit.

Interest on a home equity loan used to pay off credit cards, buy a car or cover tuition is not deductible.

Keep receipts showing how the money was spent.

Before you sign

  • Compare the APR on each Loan Estimate, not just the note rate. Origination fees, appraisal and title costs differ widely between lenders.
  • Ask about prepayment penalties and early-closure fees, which some lenders charge if you repay within the first 3 years.
  • Leave a cushion. Borrowing right up to the CLTV limit leaves no equity if prices dip, which can make it hard to sell or refinance.
  • Payments are fixed, but the loan is secured by your home: budget for it like a mortgage, not like a credit card.

Frequently Asked Questions

Common questions about the Home Equity Loan Calculator

It uses the standard amortization formula: payment = loan × i ÷ (1 − (1 + i)^−n), where i is the annual rate divided by 12 and n is the number of monthly payments. A $60,000 loan at 8.5% for 15 years costs $590.84 a month.

Sources & References

What is a home equity loan?

Defines a home equity loan as a lump-sum second mortgage secured by the home and contrasts it with a HELOC.

Loan-to-Value (LTV) Ratios, Selling Guide B2-1.2-01

Defines LTV and combined LTV (all liens ÷ property value) used for the maximum-loan calculation.

Publication 936, Home Mortgage Interest Deduction

Home equity loan interest is deductible only when proceeds buy, build, or substantially improve the home securing the loan.