Business Loan Calculator

Estimating Your Business Loan Payments

Securing financing is a major milestone for growing businesses. Whether you are funding expansion, purchasing inventory, or refinancing existing debt, this calculator estimates your monthly payment obligations and the overall interest expense of a commercial loan. For a more basic estimate, you can also use our Simple Loan Calculator to quickly compute monthly payments on any type of loan.

Understanding Amortization

Most business loans are fully amortizing, meaning they are paid off in equal installments over the term of the loan. Each payment includes both principal (repaying the original amount borrowed) and interest (the lender's fee). The monthly payment stays fixed, but the split changes: early payments are interest-heavy, and later payments put far more toward principal because interest is calculated on the remaining balance.

The chart below uses the same starting values as this tool ($50,000 borrowed at 7.5% APR over five years, $1,001.90 per month). In month 1, about $312.50 of that payment is interest and $689.40 reduces principal. By the final month, only about $6.22 is interest and $995.67 is principal, even though the payment amount never changed.

Year-by-year totals make the same idea easier to see at a glance. Interest still dominates early years, but each year you keep more of your cash flow working to pay down the loan. Our Amortization Calculator shows the full payment-by-payment schedule for your own numbers.

Standard Monthly Payment Formula

The monthly payment is calculated using the following formula:

• $$P = L \times \frac{r(1+r)^n}{(1+r)^n - 1}$$

Where:

• P: Monthly payment
• L: Loan amount (principal)
• r: Monthly interest rate (annual interest rate divided by 12)
• n: Total number of monthly payments (term in years multiplied by 12)

Why Extra Payments Matter

Making extra payments on a commercial loan can dramatically reduce the total interest you owe and pay off your balance months or years ahead of schedule. The extra amounts go directly toward reducing the outstanding principal, which lowers the balance that future interest is charged on.

On the same $50,000 loan at 7.5%, adding $200 to every monthly payment (on top of the $1,001.90 minimum) pays the loan off in 49 months instead of 60 and saves about $2,027 in total interest. Enter your own extra payment in the calculator to see payoff time and interest saved for your scenario.

Use the Loan EMI Calculator to compare different loan amounts, interest rates, and terms side by side.