Line of Credit Payment Calculator

Start by entering your total credit limit, which is the maximum amount your lender has approved. Then enter your drawn amount, the portion you actually plan to use. The difference matters because you only pay interest on what you draw, not the full limit.

Set the annual interest rate your lender has quoted. Business lines of credit typically carry variable rates tied to prime, so your actual rate will fluctuate over time.

Choose your payment structure. Interest-only payments keep your monthly obligation low but do not reduce the principal balance. Amortizing payments are higher each month but pay down the balance over a set period.

The results show your monthly interest cost at the current draw level, annualized borrowing cost, and utilization rate. Utilization rate is your drawn amount divided by the total limit. Most lenders and credit agencies prefer utilization below 30-50%, though business lines are more flexible than revolving consumer credit. Use the draw comparison to see how costs change at different utilization levels.

A business line of credit functions as a revolving facility. You draw funds as needed, repay them, and draw again up to your limit. This makes payment mechanics different from a standard term loan.

With interest-only payments, you pay only the accrued interest each billing cycle. The principal balance remains unchanged until you choose to pay it down. This structure keeps monthly costs low and gives you maximum flexibility, but it means your balance never decreases unless you actively repay principal.

With amortizing payments, each payment includes both interest and a portion of principal. The balance decreases over time on a fixed schedule. Some lenders require amortization once a draw has been outstanding for a set period, commonly 12 to 24 months.

Utilization is the ratio of drawn funds to total credit limit. Drawing $75,000 on a $200,000 line gives you 37.5% utilization. Higher utilization increases your interest cost proportionally, but it also signals to lenders how dependent your business is on the facility. Keeping utilization moderate preserves capacity for unexpected needs and demonstrates disciplined cash management.

Many lines also carry a small unused line fee, typically 0.25% to 0.50% annually on the undrawn portion. This calculator focuses on the drawn cost, which is the larger component.

A business line of credit is designed for short-term, recurring funding needs where the timing and amount vary. It is not a substitute for a term loan when you need a fixed lump sum for a specific purchase.

Working capital gaps are the most common use. If your business collects receivables in 45-60 days but pays vendors in 30, a line bridges the timing mismatch. You draw when payroll or supplier payments come due, then repay when customer payments arrive.

Seasonal businesses benefit from the revolving structure. A landscaping company might draw heavily in March to fund spring hiring and equipment prep, then repay through the summer revenue season. The facility resets for the next cycle without requiring a new loan application each year.

Bridge financing covers short gaps while waiting for a specific inflow, like a large invoice payment, a tax refund, or proceeds from an asset sale. The line provides immediate liquidity without the cost and time of arranging a term loan.

If you need funds for a single defined purpose with a known amount and repayment timeline, such as equipment, real estate, or a one-time expansion, a term loan is usually more cost-effective. Term loans offer fixed payments and often lower rates than revolving credit. The line of credit excels when you need flexible, reusable access to capital rather than a one-time disbursement.

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