Home Equity Loan Fixed or Variable? Compare the Costs

A home equity loan is generally fixed-rate: you receive a lump sum and repay it in scheduled installments, while a home equity line of credit (HELOC) is commonly variable-rate and lets you draw money over time. This calculator estimates the payment and total interest for a fixed-rate home equity loan; enter the amount borrowed, APR, and term to see the results.

Formula

The calculator applies the standard level-payment amortization formula, assuming a fixed annual percentage rate and monthly payments:

• Monthly payment: M = P × r ÷ [1 − (1 + r)⁻ⁿ]
• Total interest: I = M × n − P

P is the amount borrowed in dollars; APR is the annual percentage rate entered as a percent; r is the monthly rate, APR ÷ 1,200; n is the number of monthly payments, years × 12; M is the monthly payment in dollars; and I is estimated total interest in dollars. The displayed payment is rounded to cents, and total interest uses that rounded payment.

Worked Example

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

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

Assumptions

• The interest rate stays fixed for the full term.
• Payments are made monthly, at the end of each payment period.
• Interest is compounded monthly at APR ÷ 12.
• Fees, taxes, insurance, and escrow are not included.

How Fixed Home Equity Loans and Variable HELOCs Work

A home equity loan and a HELOC both use home equity as security, but they structure borrowing differently. A home equity loan typically advances a lump sum at closing. Its rate and required payment are usually fixed for the loan term, so the principal-and-interest payment is predictable when the contract specifies a fixed rate.

A HELOC works more like a revolving credit line. During its draw period, a borrower can access funds up to the available limit, repay some or all of the balance, and potentially borrow again, subject to the agreement. HELOC rates are often variable and may change with an index and a contractual margin. A variable rate can make payments rise or fall; payment changes depend on the balance, rate, repayment terms, and any limits or adjustment schedule in the agreement. A HELOC is not necessarily variable in every contract, so check the actual disclosures.

“Fixed” describes the interest rate, not necessarily every cost or every feature. Fees, payment due dates, prepayment terms, and other contract provisions can still matter. A fixed rate also does not mean that the loan is free of risk: the home secures the debt, and failure to meet the agreement can have serious consequences.

Choosing Between Fixed and Variable Structures

The central trade-off is payment certainty versus flexibility and exposure to rate changes. A fixed-rate lump-sum loan makes it easier to map scheduled principal-and-interest payments across the term. A variable-rate line can suit expenses that arise in stages because the borrower draws as needed, but its future borrowing cost cannot be represented by one unchanging APR.

• Consider the borrowing pattern: A single known project cost is structurally different from expenses spread over time.
• Compare repayment terms: Check when principal repayment begins, how the payment is calculated, and whether the payment can change.
• Stress-test a variable balance: Ask the lender for examples showing how payments would change at higher rates. Review any caps, floors, and adjustment frequency in the contract.
• Check access and repayment details: For a line, find out how draws, repayments, and the end of the draw period work.
• Use comparable figures: Compare the same amount, time horizon, and included charges. A fixed-loan estimate cannot forecast the cost of a HELOC whose balance or rate changes.

These are comparison factors, not a personal recommendation. The relevant contract figures are the lender’s inputs; this calculator’s 8% default is only an example and is not a statement about available rates.

Costs, Risks, and Common Misconceptions

The calculator estimates interest and scheduled principal-and-interest payments only. It does not include lender charges, closing costs, periodic fees, or other expenses that may apply. Ask for a written breakdown and compare the loan’s APR and terms as disclosed, rather than treating the calculator’s interest total as the full cost of borrowing.

A frequent misconception is that “home equity” means borrowing without risk. Both a home equity loan and a HELOC are secured by the home. Missing payments can put the property at risk under the loan agreement. Borrowing also increases debt against the home; the amount of equity available, and whether a lender will approve an application, are not determined by this calculator.

Another mistake is to treat a variable rate as though it will remain at its initial level. For a HELOC, an initial payment illustration is not a prediction of later payments. Conversely, a fixed payment estimate is not reliable if the actual contract has a variable rate, a different term, or payment features that the formula does not model.

Using the Calculator and Understanding Its Limits

Enter the amount you plan to borrow, the APR shown in the lender’s offer, and the term in years. The APR field is a percentage: enter 8 for 8%, not 0.08. The formula converts it to a monthly rate and assumes the same payment count throughout the term. Adjust the inputs to examine different hypothetical amounts or terms, but use the lender’s disclosed figures for an actual offer.

The result is an amortization estimate for a fully drawn, fixed-rate loan with equal monthly payments. It does not calculate a HELOC’s changing balance, variable rate, draw-period payment, or future repayment-period payment. It also does not account for payment rounding differences in a lender’s schedule, irregular payment dates, or contract-specific features. The total-interest calculation is based on the rounded monthly payment, so displayed figures may differ slightly from a lender’s final schedule.

Frequently Asked Questions

Are home equity loans fixed or variable?
They are generally offered with fixed rates, but terms vary by lender and contract. Read the rate and payment provisions in the specific offer.

Is a HELOC fixed or variable?
Many HELOCs have variable rates that can change under the agreement. Some contracts may offer fixed-rate options for some or all of a balance; confirm the applicable terms directly with the lender.

Can a fixed-rate home equity loan payment change?
For a standard fixed-rate, fully amortizing loan, the scheduled principal-and-interest payment remains level. Other costs or contractual features are not included in this calculator, so check the loan documents for the complete payment obligations.

Can I compare a HELOC with this calculator?
Only as a limited illustration of a fixed-rate lump-sum loan. It cannot model a HELOC’s draws, changing balance, or changing rate. Request payment examples under the HELOC’s actual terms.

Does a home equity loan put my house at risk?
The home generally secures the borrowing. Failure to meet the agreement’s payment obligations can put the property at risk; review the contract and ask the lender questions before accepting an offer.

This result is an estimate for education, and the lender’s disclosure gives the exact figures.

Related

• Equity Loan Terms: Payments, Interest and Key Details
• Equity Loan Rate Calculator: Estimate Monthly Payments
• Equity Loan Pros and Cons: Costs, Risks and Alternatives

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