Equity Loan Calculator: Estimate Payments and Interest

An equity loan, often called a home equity loan, lets a homeowner borrow against the equity built up in a property; it is usually repaid in scheduled installments. This calculator estimates a fixed-rate loan’s monthly payment and total interest from the amount borrowed, APR, and term—not how much a lender will let you borrow.

Formula

The calculator treats the loan as a fixed-rate balance repaid in equal monthly payments. It uses the standard amortizing-loan payment formula:

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. APR is entered as a percentage per year.
• n is the number of monthly payments, calculated as the term in years × 12.

Total interest is estimated as monthly payment × n − P. Because the displayed payment is rounded to cents, the interest estimate uses that rounded payment. Actual loan schedules may differ slightly because of lender rounding, payment dates, fees, or other contract terms.

Worked Example

Using the calculator’s default inputs—$20,000 borrowed, 8% APR, and a five-year term:

1. Convert APR to a monthly rate: r = 8 ÷ 1,200 = 0.0066667, or about 0.6667% per month.
2. Convert the term to payments: n = 5 × 12 = 60 months.
3. Substitute into the payment formula: 20,000 × 0.0066667 ÷ [1 − (1.0066667)−60] ≈ $405.53 per month.
4. Calculate estimated total interest using the rounded payment: $405.53 × 60 − $20,000 = $4,331.80.

These figures describe the mathematical estimate for the stated assumptions. They are not a quote or an approval decision.

Assumptions

• The interest rate stays fixed for the full term.
• Payments are equal, made monthly, with the first payment one month after borrowing.
• Interest compounds monthly at APR divided by 12.
• Fees, taxes, insurance, property costs, and any escrow or optional charges are not included.

What an Equity Loan Is

Home equity is the portion of a property’s value not covered by debt secured against it. A simple estimate is the property’s current market value minus the mortgage and other liens. For example, if a home were valued at $350,000 and secured debt totaled $220,000, the arithmetic difference would be $130,000. That figure is not necessarily the amount available to borrow: a lender may use its own valuation and underwriting criteria, and the loan contract determines the amount and terms.

A home equity loan is generally a separate loan secured by the home. The borrower receives a lump sum and repays it over an agreed period, commonly through scheduled payments. Since the home secures the debt, failing to meet the contract’s obligations can put the property at risk. The exact consequences and borrower protections depend on the contract and applicable rules; review the documents and seek qualified guidance for questions about them.

How the Calculator Helps—and What It Cannot Show

Use the estimate to see how the payment changes when you alter the amount, APR, or term. A longer term generally spreads repayment across more months, which can lower the scheduled payment while increasing the time interest accrues. A larger principal or higher entered APR generally raises the payment, all else equal.

The calculator does not determine a property’s equity, establish eligibility, or calculate a lender’s maximum loan amount. It also does not account for variable rates, payment holidays, extra payments, closing costs, or a changing balance from fees. Enter the rate and loan amount supplied for the specific offer you are evaluating; obtain any charges and full repayment schedule directly from the lender.

Equity Loan Compared With a HELOC

A home equity loan and a home equity line of credit (HELOC) both use home equity as a basis for borrowing, but their structures differ. An equity loan typically provides the proceeds as one lump sum and schedules repayment of principal and interest. A HELOC is a revolving credit line: the borrower can draw funds, generally subject to the agreement’s access period and limits, and the balance can change as funds are drawn or repaid. HELOC rates may be variable, depending on the contract.

This calculator models only a single lump-sum loan with a fixed rate and equal monthly payments. It cannot calculate a HELOC payment from a credit limit alone; that would require details such as the amount drawn, rate structure, payment rules, and any applicable fees.

Costs, Risks, and Common Misunderstandings

The payment shown is not necessarily the complete cost of borrowing. A loan may have charges that are not represented by APR or by the formula’s inputs, and the timing and treatment of those charges vary. Read the disclosure and contract for the annual percentage rate, payment schedule, total repayment amount, fees, and whether any rate or payment can change.

• Equity is not cash already available: the difference between estimated value and debt does not establish a loan offer.
• A lower payment does not always mean lower total cost: a longer repayment period can mean more interest over time.
• Secured debt has property risk: the home is collateral, so missed payments can have serious consequences under the contract.
• APR and interest rate are not interchangeable in every comparison: APR may reflect certain borrowing costs, but the calculation here uses the entered APR as a nominal annual rate divided by 12. Contract disclosures may use different conventions.

When reviewing an offer, compare the written terms on the same basis: loan amount, fixed or variable rate, payment amount, term, fees, and total repayment. Do not treat this estimate as financial, legal, or tax advice.

Frequently Asked Questions

How is home equity calculated?
Subtract the balances of debts secured by the property from its estimated current value. A lender’s valuation and its own criteria may differ from a personal estimate.

Is an equity loan the same as a mortgage?
Both can be loans secured by property, but an equity loan is generally a separate borrowing against equity, while a mortgage commonly refers to the primary loan used to buy or refinance property. Terminology and contract structures can vary.

Can I use this calculator for a HELOC?
No. It assumes one lump-sum advance, a fixed rate, and equal monthly payments. A revolving line needs additional inputs and may have different payment and rate rules.

Why might my lender’s payment differ?
The lender may use a different APR convention, payment date, rounding method, loan balance, or fee structure. The calculator also excludes costs that are not entered.

Does a home equity loan put my home at risk?
It is commonly secured by the home, so failing to meet the loan contract can place the property at risk. Read the agreement carefully and ask the lender or a qualified professional about terms you do not understand.

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

Related

• Escrow Account Advantages: How They Protect Payments
• Escrow Account Agreement: What It Covers
• Dispute Escrow Account Balance Calculator

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