Home Equity Loan vs. Line of Credit Calculator

This calculator compares the estimated monthly payment and total interest for a fixed-rate home equity loan with a fully drawn home equity line of credit (HELOC), using the same amount, APR and repayment term. Enter the figures supplied by a lender to see how the payment structures compare; the calculation is an illustration, not a loan offer.

Formula

For both examples, the calculator uses the standard level-payment loan formula. It assumes the entire HELOC amount is borrowed at once and then repaid through equal monthly payments over the selected term, so under these assumptions its results match the fixed-rate loan calculation.

Monthly payment: M = round[P × r ÷ (1 − (1 + r)⁻ⁿ), 2]. 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, calculated as APR ÷ 1,200.
• n is the repayment term in months: years × 12.
• M is the monthly payment, in dollars, rounded to cents.
• I is estimated total interest over the repayment term, in dollars.

The calculation rounds the monthly payment to cents and uses that rounded amount to estimate total interest. Actual billing, final-payment adjustments and lender calculations may differ.

Worked Example

Using the calculator’s defaults: P = $50,000, APR = 8%, and term = 10 years.

1. Convert the APR to a monthly rate: r = 8 ÷ 1,200 = 0.0066667.
2. Convert the term to months: n = 10 × 12 = 120.
3. Apply the payment formula: M = round[$50,000 × 0.0066667 ÷ (1 − (1.0066667)⁻¹²⁰), 2] = $606.64 per month.
4. Calculate interest using the rounded payment: I = ($606.64 × 120) − $50,000 = $22,796.80.

With the same amount, APR and term, the displayed HELOC full-draw example also produces a payment of $606.64 and estimated total interest of $22,796.80. That matching result reflects the simplified assumptions—not a claim that real HELOC costs or payment schedules are identical.

Assumptions

• The interest rate is fixed for the full calculation period.
• Payments are equal, paid monthly at the end of each period.
• Interest compounds monthly at APR ÷ 12.
• The full amount is borrowed at the start; the HELOC is not drawn gradually.
• Fees, taxes, insurance, escrow, changing rates and any interest-only draw period are not included.

How a Home Equity Loan and HELOC Differ

A home equity loan generally provides a lump sum that is repaid in scheduled installments. A HELOC is a revolving credit arrangement: a borrower may draw funds as needed during an access period, repay some or all of the balance, and potentially draw again under the account terms. The property secures both kinds of borrowing, so missed payments can have serious consequences, including risk to the home.

The practical distinction is when and how money is accessed. For example, someone facing a $30,000 bill due at once might compare lump-sum borrowing with access to a credit line for staged expenses. With a line, interest typically relates to the amount outstanding, but the specific rate method, minimum payment and draw rules depend on the agreement. A line’s payment can change as the balance or rate changes.

How to Compare Quotes

For a meaningful comparison, use the actual terms offered for each product rather than assuming equal rates or repayment periods. Ask for the payment schedule and whether the quoted rate is fixed or variable. A quoted APR alone does not describe every feature or cost.

• Compare the amount you expect to borrow, not just the credit limit.
• Check how long funds can be drawn and when repayment begins.
• Ask whether payments during any access period cover principal, interest, or both.
• Find out how a variable rate is determined and how payment changes are handled.
• Review fees and any charges associated with opening, maintaining, drawing on or repaying the account.
• Check whether early repayment, a final payment, or an unused line affects costs under the contract.

To compare different offers fairly, the calculator’s matching APR and term are only a controlled illustration. Enter each offer’s figures separately and note that changing-rate HELOCs cannot be represented accurately by one fixed APR for the full term.

Costs, Risks and Common Misconceptions

A common misconception is that a HELOC is always cheaper because interest is charged only on what is borrowed. That may describe how interest accrues on an outstanding balance, but it does not establish the overall cost: rates can vary, fees may apply, and payment terms can differ. Likewise, a fixed payment estimate does not guarantee a fixed-rate quote or include every charge.

Both products put the home at risk because the debt is secured by it. Borrowing against home equity also reduces the equity available to the owner. Consider the consequences of payment changes, income disruption and the possibility that the balance could remain unpaid longer than planned. Read the agreement and lender disclosures carefully; the exact terms, costs and rights depend on the documents and applicable rules.

When This Calculator Helps—and Its Limits

Use the calculator to understand how a fully amortizing payment responds to the borrowed amount, APR and term. A longer repayment period generally spreads principal repayment over more months; with the same rate and amount, that can lower the scheduled monthly payment while increasing total interest. This is mathematical context, not a recommendation about which term to choose.

The HELOC side is deliberately simplified. Many lines allow variable rates, changing balances and different payment rules during and after the draw period. This calculator does not model those features or estimate a future rate. It also does not assess eligibility, available equity, the suitability of borrowing, or tax treatment. Obtain the applicable figures and explanations directly from the lender.

Frequently Asked Questions

Is a home equity loan the same as a HELOC?
No. A home equity loan commonly provides a lump sum with scheduled repayment, while a HELOC generally provides a reusable credit line with borrowing and repayment governed by its agreement.

Which usually has a lower payment?
There is no reliable answer without the actual amount, rate, balance, payment rules and repayment period. A HELOC’s payment may change, while a fixed-rate loan with level payments is more predictable under its stated terms.

Does a HELOC charge interest on the full credit limit?
Interest is generally based on the outstanding balance, not simply the unused limit, but the contract controls how interest and payments are calculated. Check the lender’s disclosures.

Can I compare a variable-rate HELOC with a fixed-rate loan here?
Only as a snapshot using one assumed APR. The calculator cannot forecast rate changes or accurately project a variable-rate HELOC’s lifetime payments and interest.

Can I lose my home if I do not repay either type?
Both are secured by the home. Failure to meet the agreement’s obligations can put the property at risk; contact the lender promptly if payments become difficult.

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

Related

• Current HELOC Rates: What the Calculator Can Show
• Cash From a Home Equity Line of Credit Calculator
• Average HELOC Rates: What Shapes Your Rate?

in amt | Borrowed amount | $ | 50000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Repayment term | years | 10 | 0.0833 | 50
out loanpmt | Home equity loan monthly payment | $ | round(amt * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)), 2) | 2
out loanint | Home equity loan total interest | $ | loanpmt * yrs * 12 - amt | 2
out helocpmt | HELOC payment after full draw | $ | round(amt * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)), 2) | 2
out helocint | HELOC total interest after full draw | $ | helocpmt * yrs * 12 - amt | 2