Home Equity Loan Calculator

Background.

A home equity loan allows homeowners to borrow against the value they have built up in their property. The loan is typically a fixed-rate installment product with a lump-sum disbursement, secured by a second lien on the home. It differs from a home equity line of credit (HELOC), which provides a revolving credit line with variable rates. Home equity loans are commonly used for home improvements, debt consolidation, education expenses, and major purchases. Because the loan is secured by real estate, rates are lower than unsecured personal loans or credit cards. The home equity loan market grew rapidly in the 1980s and 1990s as financial innovation expanded consumer access to secured credit. Today, home equity loans represent a significant segment of the consumer credit market, with outstanding balances totaling hundreds of billions of dollars. The fixed-rate structure appeals to borrowers seeking stability in an environment of rising interest rates, while the lump-sum disbursement provides immediate liquidity for large, one-time expenditures. Unlike unsecured personal loans, which rely solely on credit score and income, home equity loans are underwritten primarily against the property's appraised value and the borrower's equity stake.

The amount a homeowner can borrow is determined by the combined loan-to-value ratio (CLTV), which adds the existing first mortgage balance to the proposed equity loan and divides by the home's current market value. Most lenders cap CLTV at 80% to 90%, meaning the borrower must retain at least 10% to 20% equity after the loan closes. For example, a home worth $400,000 with a $280,000 mortgage balance has $120,000 in available equity. At an 80% CLTV cap, the borrower can access up to $40,000 through a home equity loan.

Interest on home equity loans may be tax-deductible if the proceeds are used to buy, build, or substantially improve the home securing the loan. The Tax Cuts and Jobs Act of 2017 limited the mortgage interest deduction to acquisition indebtedness up to $750,000 for loans originated after December 15, 2017. Interest on equity loans used for other purposes is no longer deductible. Borrowers should consult a tax professional. The fixed-rate structure of home equity loans provides payment certainty, which is valuable in a rising-rate environment where HELOC rates would increase. Home equity loans are also typically easier to qualify for than cash-out refinances because they do not require replacing the existing first mortgage. Borrowers with low-rate first mortgages can preserve that rate while accessing equity through a second lien. The fixed term also creates a clear payoff date, which helps with long-term financial planning and budgeting. However, home equity loans carry the risk of foreclosure if the borrower defaults, because the home serves as collateral for both the first and second liens. Borrowers should ensure they can afford the combined monthly payments on both mortgages before taking out an equity loan. Lenders evaluate the combined debt-to-income ratio, which includes payments on both mortgages plus other debts, to assess repayment capacity. Borrowers should also carefully consider the opportunity cost of using home equity for consumption rather than investment. Using equity to fund home improvements that increase property value can be financially prudent, while using it for depreciating assets or discretionary spending erodes wealth. Borrowers should compare the total cost of the equity loan, including closing costs and interest, against the expected return on the use of funds.

What is home equity loan calculator?

A home equity loan is a fixed-rate, lump-sum loan secured by the borrower's equity in a residential property. It is typically subordinate to the first mortgage and is repaid in equal monthly installments over a term of 5 to 30 years. The loan amount is based on the home's appraised value, the outstanding mortgage balance, and the lender's maximum CLTV ratio. Unlike a HELOC, which functions like a credit card, a home equity loan provides funds upfront and charges fixed interest on the entire amount from day one. This makes home equity loans suitable for one-time expenses with known costs, such as a kitchen renovation or debt consolidation. HELOCs, by contrast, are better for ongoing projects where costs are uncertain. The fixed rate eliminates the risk of payment increases if market rates rise, providing budget stability that revolving lines of credit cannot match. Borrowers should compare the total cost of a home equity loan against a cash-out refinance, which replaces the first mortgage with a larger loan. A cash-out refinance may be preferable if current mortgage rates are lower than the existing first mortgage rate, or if the borrower wants to consolidate both loans into a single payment. Borrowers should compare the total cost of both options before deciding.

How to use this calculator.

1. 01Enter your home's current estimated market value.
2. 02Input the remaining balance on your first mortgage.
3. 03Specify how much you want to borrow through the equity loan.
4. 04Enter the annual interest rate offered by the lender.
5. 05Choose the loan term in years—15 is common for equity loans.
6. 06Optionally add estimated closing costs as a percentage.
7. 07Review the monthly payment, combined LTV, and total interest cost.

The formula.

The home equity loan uses the same monthly payment formula as a standard amortizing mortgage because it is structurally identical: a fixed principal amount, fixed rate, and fixed term. The only difference is that it is typically a second lien, which affects the lender's risk assessment and pricing but not the mathematics.

The combined loan-to-value ratio is the critical constraint. Lenders use CLTV rather than simple LTV because the first mortgage already consumes part of the property's value. If home prices decline, the second-lien lender is at greater risk of loss because the first mortgage must be satisfied in full before the second lien receives anything. This is why second-lien rates are typically 1 to 3 percentage points higher than first-mortgage rates.

The closing cost calculation is a simple percentage of the loan amount, typically 2% to 5% for home equity loans. These costs may include appraisal fees, title search, credit report, and origination fees. Unlike first mortgages, some lenders offer no-closing-cost equity loans in exchange for a slightly higher rate. The total interest formula is standard: total payments minus principal. Dimensional analysis is consistent with all mortgage calculators: dollars in, dollars out. The calculations are deterministic, reproducible, and follow standard industry conventions. The CLTV constraint is a ratio of dollars to dollars, producing a dimensionless percentage that lenders compare against their policy limits. The appraisal process determines the home's market value, which directly affects the maximum loan amount. If the appraisal comes in lower than expected, the borrower may need to reduce the loan amount or find a lender with a higher CLTV cap. Some lenders also require a minimum credit score of 620 or higher for approval. The appraisal fee is typically paid by the borrower and ranges from $300 to $500. Some lenders also charge annual maintenance fees or early termination penalties, which should be included in the total cost comparison when shopping for a home equity loan.

A worked example.

Frequently asked questions.

References& sources.

1. [1]CFPB (2023). "What is a home equity loan?"
2. [2]IRS (2023). "Publication 936: Home Mortgage Interest Deduction."
3. [3]Federal Reserve (2023). "Home Equity Lines of Credit (HELOCs) and Home Equity Loans."
4. [4]OCC (2023). "Real Estate Lending: Comptroller's Handbook."
5. [5]U.S. Congress (2017). "Tax Cuts and Jobs Act, Pub. L. No. 115-97, Section 11043." 131 Stat. 2054.