Home Equity Loan Rate Calculator and Payment Formula

This calculator estimates a home equity loan’s monthly payment and total interest from the amount borrowed, APR, and repayment term. Enter figures from a lender’s quote to see the payment implied by a fixed-rate, fully amortizing loan; the calculator does not determine what rate or loan amount you may qualify for.

Formula

For a fixed-rate loan with equal monthly payments, the payment formula is:

Monthly payment = P × r ÷ [1 − (1 + r)−n]

• P is the amount borrowed, in dollars.
• r is the monthly interest rate, calculated as APR ÷ 1,200. For example, an 8% APR gives a monthly rate of 0.0066667.
• n is the number of monthly payments: loan term in years × 12.
• APR is the annual percentage rate entered as a percentage. The calculator treats it as the annual rate for this payment calculation.

Total interest is estimated as the monthly payment, rounded to cents, multiplied by the number of payments, minus the original principal: Total interest = monthly payment × n − P. Results are rounded to two decimal places. The displayed interest is therefore based on the rounded monthly payment, as a payment schedule is normally expressed in cents.

Worked Example

Using the calculator’s default inputs—$20,000 principal, 8% APR, and a five-year term—first convert the inputs to monthly terms:

• Monthly rate: 8 ÷ 1,200 = 0.0066667.
• Number of payments: 5 × 12 = 60.
• Payment: $20,000 × 0.0066667 ÷ [1 − (1.0066667)⁻⁶⁰] = $405.53 per month, rounded to cents.
• Total of rounded payments: $405.53 × 60 = $24,331.80.
• Estimated total interest: $24,331.80 − $20,000 = $4,331.80.

The result represents principal and interest under the stated assumptions. A lender’s payment schedule may differ if the quoted APR, disbursement, payment dates, fees, or other loan terms are handled differently.

Assumptions

• The interest rate is fixed for the full loan term.
• Payments are equal monthly payments, made at the end of each monthly period.
• Interest is modeled monthly at APR ÷ 12.
• Fees, taxes, insurance, mortgage insurance, escrow, and any optional charges are not included.

What Home Equity Loan Rates Mean

A home equity loan is generally a lump-sum loan secured by the borrower’s home. Its rate is the interest charged on the outstanding balance, stated as an annual rate. A fixed rate keeps the scheduled rate—and ordinarily the principal-and-interest payment—unchanged during the agreed term. A home equity line of credit is different: it is revolving credit, and its rate and payment structure may vary according to the contract.

There is no single home equity loan percentage rate that applies to everyone. A lender sets the offered rate for a particular application and loan terms. Rates can differ between lenders and borrowers, and change over time. This page does not state a current or typical market rate. Use the rate and fees in an actual lender quote rather than treating the example’s 8% as a market benchmark or offer.

What Can Affect a Quoted Rate

Lenders may assess factors such as the requested loan amount, repayment term, credit and financial information, the home’s value, and the amount already owed against it. Their pricing methods and eligibility requirements vary, and a calculator cannot reproduce an underwriting decision. A quoted percentage alone also does not show every cost: ask for the lender’s written disclosures and compare the figures and terms they provide.

When reviewing a quote, distinguish the interest rate from APR. APR is intended to express the annual borrowing cost in a standardized way and may account for certain charges, depending on the product and disclosure. The calculator uses the entered APR as the rate in the payment formula; it does not separately add fees or model how a lender incorporates them. For an exact scheduled payment, use the interest rate and payment terms specified in the lender’s documents, and check which quoted figure the lender says applies to the payment calculation.

How to Use the Estimate and Compare Terms

Enter the principal you expect to borrow, the lender-provided annual rate, and the repayment term in years. The first result is the estimated monthly principal-and-interest payment; the second is estimated interest across all scheduled payments. Test one input at a time to understand how the payment changes, but treat those results as comparisons of arithmetic, not predictions of approval or an offer.

For example, at the same rate and principal, a longer term usually lowers the scheduled monthly payment because repayment is spread across more months, while increasing the number of months during which interest accrues. A shorter term usually means fewer payments and less time accruing interest, but a higher scheduled payment. The precise results depend on the entered inputs. A larger principal raises the payment when the rate and term are held constant.

To compare lender offers, use the same principal and term for each estimate, then examine more than the monthly amount. Review the rate type, APR, repayment period, fees, payment schedule, and any conditions in each lender’s disclosures. A payment that excludes fees or other housing expenses is not a complete monthly cost of owning a home or using home-secured credit.

Limits and Common Misunderstandings

The output is not a loan offer, approval estimate, or complete amortization schedule. It assumes the full principal is borrowed at the start and that payments are made regularly. It does not model variable rates, irregular payment dates, skipped or extra payments, a changing balance, or fees financed into the loan. If a lender’s terms include any of those features, its disclosed schedule is the relevant source for the contractual figures.

Do not confuse a home equity loan with a cash-out refinance or a line of credit. They are different borrowing arrangements, and this calculator models only a simple fixed-rate installment loan. Because the loan is secured by a home, missed payments can have serious consequences under the contract. Understand the repayment obligation and the lender’s terms before relying on an estimate.

Common input errors include entering 8 instead of 0.08 in the APR field—the calculator expects 8 for 8%—or entering a term in months where the field asks for years. Rounding may also cause small differences from a lender’s figures. If the lender quotes a payment that does not match, verify the principal, rate used for payment, term, payment timing, and included charges instead of assuming the calculator reflects the contract.

Frequently Asked Questions

What is a home equity loan percentage rate?
It is the annual interest rate charged on the unpaid balance of a loan secured by home equity. The rate offered depends on the specific lender, application, and contract; there is no universal rate.

How do I calculate a home equity loan payment?
Convert the annual rate to a monthly rate by dividing the percentage by 1,200, and convert the term to months. Apply the fixed-payment formula shown above using the amount borrowed, monthly rate, and number of payments.

Is APR the same as the interest rate?
No. The interest rate is the rate used to calculate interest on the balance. APR is a broader annual cost figure that may reflect certain charges. Check the lender’s disclosures to see how each figure is defined and which rate is used to calculate the scheduled payment.

Does a lower monthly payment mean a lower total cost?
Not necessarily. A longer term can spread repayment over more months and may increase total interest even when the monthly payment is lower. Compare the full payment schedule and disclosed costs, not only the monthly figure.

Can this calculator tell me what rate I will receive?
No. It calculates payments from a rate you enter. Only a lender can provide the rate and terms applicable to a particular application.

Is a home equity loan the same as a HELOC?
No. A home equity loan typically provides a lump sum repaid through scheduled installments; a HELOC is a line of credit with different access and repayment terms. This calculator models a fixed-rate lump-sum loan, not a HELOC.

This result is an estimate for educational use; the lender’s disclosure gives the exact figures.

Related

• Home Equity Loan Rates: Estimate Payments and Interest
• Equity Loan Rates and Amounts: Estimate Your Payment
• Personal Loan Equity Payment Calculator: What It Means

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2
out int | Total interest | $ | pmt * yrs * 12 - p | 2