Business Equity Line of Credit: How It Works

A business equity line of credit lets a company borrow against equity in a commercial property or, in some arrangements, an owner’s home or other assets. This page’s calculator estimates the monthly payment and total interest on a fully drawn, fixed-rate loan; enter the amount, APR, and term to see the results.

Formula

The calculator uses the standard level-payment formula for a loan repaid in equal monthly installments:

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

Total interest is the rounded monthly payment multiplied by the number of payments, minus the original principal: interest = payment × n − P. The calculator assumes the full loan amount is disbursed at the beginning. It does not calculate a revolving line’s changing balance or interest-only draw payments.

Worked Example

Using the defaults—$20,000 borrowed, 8% APR, and a five-year term:

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

Assumptions

• The interest rate stays fixed for the entire repayment term.
• Payments are made monthly at the end of each period.
• Interest compounds monthly, using APR divided by 12.
• The estimate excludes draw fees, closing costs, annual or maintenance charges, taxes, insurance, and other lender charges.

What a Business Equity Line of Credit Is

A business equity line of credit (often called a business HELOC when secured by a home) is a revolving borrowing arrangement secured by property equity. Equity is generally the property’s value less debts secured against it. A lender determines whether the property and borrower meet its requirements and sets a credit limit; the borrower can then draw funds up to that limit, subject to the agreement.

Unlike a term loan, a line may allow repeated borrowing as the borrower repays principal during an available draw period. The property securing the line creates a serious risk: if the borrower fails to meet the agreement, the lender may have rights against the collateral. When a personal residence is pledged for business borrowing, the owner’s home is at risk, not merely the business’s equipment or cash.

How the Line Works—and What the Calculator Misses

A typical arrangement has a draw period, when withdrawals are permitted, followed by a repayment period. During the draw period, required payments may be calculated differently from fully amortizing payments; some agreements require interest payments, while others specify another method. At the end of the draw period, the borrower may owe principal as well as interest, and payments can rise. The contract controls the details.

This calculator is not a line-of-credit payoff or draw calculator. It treats the entered amount as a single lump-sum loan, then calculates equal principal-and-interest payments over the entered term. That makes it useful for a rough comparison with a fully amortizing loan, but it cannot show the effect of several withdrawals, repayments, variable rates, a changing limit, or a final balloon payment.

For example, a company drawing $10,000 now and another $5,000 six months later does not have the same interest timeline as one borrowing $15,000 on day one. A proper estimate for that pattern needs each transaction’s date, balance, and applicable rate, plus the agreement’s payment rules.

Costs, Qualification, and Choosing Carefully

The APR is only one figure to examine. Ask for the full written terms and identify the rate type, how and when a variable rate can change, the draw-period end date, required payments, repayment term, credit limit, and any fees. A variable APR can make later interest costs differ from this fixed-rate estimate. Confirm whether the line has a minimum draw, limits on use, or conditions for continued availability.

Because the facility is secured, the lender may assess property value, existing liens, repayment capacity, business finances, and other factors. Requirements vary by lender and product; no calculator can establish approval or the amount a business might receive. Compare the total cost and repayment structure with the business’s cash-flow timing, and understand whether an owner is also personally responsible under the documents. Get the actual APR, fee schedule, and payment provisions directly from the lender rather than relying on a generic example.

Common Misconceptions and Risks

• “Equity means available cash.” Equity is not automatically a borrowing limit. The lender determines the limit after considering its valuation and underwriting.
• “A line is the same as a loan.” A line can be drawn and repaid in stages; a term loan typically provides a lump sum with a scheduled repayment plan.
• “The rate shown today stays the same.” Some lines have variable rates. Read the index, margin, adjustment schedule, and any caps or floors in the agreement.
• “Business use protects personal property.” The collateral named in the documents secures the debt. Pledging a home can put it at risk if repayment fails.

Borrowing against an asset also ties business financing to that asset. A drop in property value, a cash-flow shortfall, or a payment increase can make repayment harder. Review what happens when the draw period ends and whether the business could manage the repayment schedule without relying on another loan.

Frequently Asked Questions

Can a business get a line of credit using home equity?
Some lenders offer arrangements that use a home as collateral for business borrowing. Availability, permitted uses, borrower obligations, and terms depend on the specific agreement. The home may be at risk if the debt is not repaid.

Is a business equity line of credit the same as a business loan?
No. A line generally allows borrowing in multiple draws up to a limit, while a conventional term loan usually provides a lump sum repaid on a schedule. The exact payment and access rules depend on the product contract.

How much can I borrow against business property?
There is no universal amount. It depends on the lender’s valuation, existing debts secured by the property, underwriting, and product terms. Ask the lender for its written limit and assumptions.

Does this calculator show the payment on an actual equity line?
No. It estimates equal monthly payments on a fully drawn, fixed-rate amortizing loan. An actual line may have variable interest, staged draws, interest-only payments, fees, or a different repayment schedule.

What happens when the draw period ends?
The agreement determines what follows. Borrowing may stop and the balance may enter a repayment period, with payments that include principal and interest. Check the contract for the end date, payment calculation, and any final balance due.

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

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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