Business Loan Calculator
Calculate payment amounts, total repayment, and total interest for a business loan across monthly, weekly, or biweekly payment schedules.
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How to use this calculator
P = loan principal, r = periodic interest rate, n = total number of payments (varies by frequency).
- 1
Enter the total business loan amount you need.
- 2
Enter the annual interest rate quoted by your lender.
- 3
Enter the loan term in months (e.g. 60 for a 5-year term).
- 4
Select your preferred payment frequency — monthly, biweekly, or weekly.
Frequently asked questions
How does the tool turn a term in months into a number of payments?
The term is entered in months and converted with n = round(months ÷ 12 × payments per year), using 12 for monthly, 26 for biweekly and 52 for weekly. A 60-month loan therefore has 60, 130 or 260 payments, and a 13-month biweekly loan has 28. The rounding means the schedule can run a little shorter or longer than the exact term.
Which formula and rate convention does it use?
This tool uses payment = P × r ÷ (1 − (1 + r)^−n), with r equal to the annual rate divided by the payments per year (12, 26 or 52) and payments made at the end of each period. Dividing by 26 or 52 is a nominal-rate convention. Some business lenders instead quote a factor rate, use a daily or actual-day basis, or collect fixed daily or weekly sums, and the result would differ.
Why is total interest lower with weekly payments?
In this model the balance is reduced more often and interest is charged on a smaller balance each period, so the total falls slightly. On $50,000 at 7.5% over 60 months, monthly payments cost $10,113.85 of interest, biweekly $10,030.81 and weekly $9,995.20. It is not an accelerated schedule: a biweekly payment here is not half a monthly payment.
What happens at 0% interest or a term of 0?
At exactly 0% the payment is the amount divided by the number of payments, with $0.00 interest, so $20,000 over 10 months paid biweekly is 22 payments of $909.09. A loan amount of 0 or a term that rounds to no payments shows n/a rather than a division error.
Are origination fees, guarantees or other charges included?
No. Arrangement fees, broker fees, personal guarantee costs, valuation charges, late fees and early-repayment penalties are all missing, and the full loan amount is treated as received. A fee deducted from the proceeds raises the real cost of borrowing above what the tool shows.
Does the tool cover balloon payments, interest-only periods or lines of credit?
No. Every payment is equal, the rate is fixed and the balance reaches zero at the end. Revolving credit, seasonal repayment, balloon structures, variable rates and revenue-based repayments need a different model.
What do the first-payment lines show?
First-payment interest is the starting amount × the periodic rate, and first-payment principal is the payment minus that interest. For the default loan the monthly figures are $312.50 interest and $689.40 principal. No later row or running balance is displayed.
Can I rely on the example rates?
Treat them as inputs for illustration only. Real business-loan rates, fees and eligibility rules change and differ between lenders, and the lender’s agreement governs the amounts you owe.
Business loan repayments: how payment frequency changes the schedule
Counting periods and setting the periodic rate
This calculator lets you choose monthly, biweekly or weekly repayment. It divides the annual rate by 12, 26 or 52 to get the periodic rate, converts the term in months into a rounded number of payments, and applies P × r ÷ (1 − (1 + r)^−n). The default $50,000 at 7.5% over 60 months gives a monthly payment of $1,001.90, 60 payments, $10,113.85 of interest and $60,113.85 repaid in total. The first payment is $312.50 of interest and $689.40 of principal.
Worked example: a 36-month loan paid weekly
For $120,000 at 9% over 36 months, the monthly option is $3,815.97 for 36 payments with $17,374.85 of interest. Switching to weekly gives 156 payments of $878.41 and $17,031.30 of interest. The weekly first payment is $207.69 of interest and $670.71 of principal. Both rows come from running the tool with those inputs. Comparing them shows the effect of the frequency alone, as the amount, rate and term are identical. The interest gap between the two rows is small next to the size of the loan, which is worth remembering before reading much into the frequency setting.
Frequency compared on the default loan
The table keeps $50,000, 7.5% and 60 months, changing only how often a payment falls. A shorter interval produces more, smaller payments, and the interest total drifts down because the balance is reduced sooner. The biweekly payment is not half of the monthly one, since 130 payments in the model cover the same 60 months as 60 monthly payments do.
| Frequency | Payment | Number of payments | Total interest | Total repaid |
|---|---|---|---|---|
| Monthly | $1,001.90 | 60 | $10,113.85 | $60,113.85 |
| Biweekly | $461.78 | 130 | $10,030.81 | $60,030.81 |
| Weekly | $230.75 | 260 | $9,995.20 | $59,995.20 |
Rounding of the term and the zero cases
Because the number of payments is rounded, a 13-month loan paid biweekly is modelled as 28 payments of $1,861.37, not exactly 13 months. A 0% rate is honoured as a straight division, so $20,000 over 10 months biweekly is 22 payments of $909.09 with no interest, and a zero loan amount or term returns n/a.
What a lender may do differently
Fees, guarantees, factor-rate pricing, daily interest, balloon payments, variable rates and early-repayment terms are not part of the arithmetic. Real rates, fees and rules change, so read the output as a comparison of repayment shapes, with the lender’s offer deciding the actual obligation.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →