Business Term Loan Repayment Calculator

This business term loan repayment calculator estimates a fixed monthly payment and total interest from the loan amount, annual percentage rate (APR), and repayment term you enter. It assumes equal monthly payments and a fixed rate, so the results help illustrate the basic repayment schedule—not the exact amount a lender will bill.

Formula

The calculator uses the standard fixed-payment amortization formula. It converts the annual percentage rate to a monthly rate, then calculates the payment that repays principal and interest over the specified number of months.

• Monthly payment: P × r ÷ [1 − (1 + r)⁻ⁿ]
• Total interest: monthly payment × n − P
• r is the monthly interest rate, calculated as APR ÷ 1,200.
• P is the starting principal, in dollars.
• n is the number of monthly payments, calculated as years × 12.

The APR is entered as a percentage: for example, 8 means 8%, not 0.08. The calculator uses the payment formula without rounding the payment to cents internally; displayed results are rounded to two decimal places. A lender’s schedule may differ because of its rounding and payment-date conventions.

Worked Example

Using the calculator’s defaults: principal P = $20,000, APR = 8%, and term = 5 years.

1. Convert the annual rate to a monthly decimal rate: r = 8 ÷ 1,200 = 0.0066667.
2. Convert the term to monthly payments: n = 5 × 12 = 60.
3. Substitute the values: payment = 20,000 × 0.0066667 ÷ [1 − (1.0066667)⁻⁶⁰].
4. The estimated monthly payment is $405.53, rounded to cents.
5. Total interest is approximately $405.53 × 60 − $20,000 = $4,331.80, using the displayed rounded payment.

Assumptions

• The interest rate stays fixed for the full term.
• Payments are equal, made monthly, and assumed to be paid at the end of each period.
• Interest compounds monthly at APR ÷ 12.
• Fees, taxes, insurance, collateral costs, and other charges are not included.

How Business Term Loan Repayment Works

A business term loan provides a principal amount that is repaid over an agreed period, commonly through scheduled installments. Each installment generally covers interest accrued since the prior payment and reduces the outstanding principal. Early in a fully amortizing loan, a larger share of each payment goes toward interest; as the balance falls, more goes toward principal.

For a fixed-rate loan with regular monthly payments, the payment amount is designed to bring the balance to zero by the end of the term. This differs from a loan with a balloon payment, where installments may not fully repay principal and a larger amount is due at maturity. Some agreements also have variable rates, irregular payment schedules, interest-only periods, or fees. Those structures are not represented by this calculator.

Repayment terms and payment frequency are set by the loan agreement. Check the agreement or lender disclosure for the first due date, due-date frequency, how payments are applied, and whether the quoted amount includes any charges. Do not treat a calculator estimate as a billing schedule.

Reading the Results and Choosing Inputs

The monthly payment is a mathematical estimate of the recurring installment under the assumptions above. Total interest is the estimated amount paid for interest over the full modeled term; it is not the total cash paid, which would include principal and potentially other costs. The calculation assumes the loan runs to the end of the term and does not model early payoff.

Use figures that match the loan terms you want to understand. Principal is the amount borrowed, not necessarily the total cost of a purchase. Use the APR supplied for the relevant loan offer, and enter the term in years. If an offer quotes a monthly rate, convert it to an annual APR only using the lender’s stated method; do not assume all quoted rates are defined alike. For actual fees, payment dates, and payoff figures, use the lender’s documents or ask the lender for the applicable disclosure.

A longer term generally spreads repayment across more installments, which lowers the calculated payment for a given principal and rate but can increase total interest when the rate is positive. A shorter term has fewer payments, so its monthly payment is higher under the same assumptions, while the modeled total interest is lower. These are formula relationships, not a recommendation about which term to choose.

Costs, Variations, and Common Problems

The APR and principal are only part of a business loan’s cost. A lender may quote fees or other charges separately, and the way those affect the amount received or repaid depends on the agreement. Since this calculator has no inputs for such items, its total interest figure should not be read as a complete measure of borrowing cost.

• Confusing APR and monthly rate: Enter APR as an annual percentage. The formula divides it by 1,200 to get a monthly decimal rate.
• Entering the wrong amount: Check whether the principal is the amount financed or includes financed charges. The calculator uses the number entered as the starting balance.
• Assuming all term loans amortize evenly: Balloon payments, interest-only periods, variable rates, and nonmonthly schedules need different calculations.
• Rounding differences: A lender may round interest or payments each period, so its final installment and total may differ slightly from a formula estimate.
• Expecting a payoff quote: The calculator does not account for the exact date of payoff, accrued interest since the last installment, or agreement-specific charges.

Extra principal payments can change the payoff date and total interest, but the result depends on when they are made and how the lender applies them. This calculator assumes only the scheduled equal payments. To model extra payments accurately, a month-by-month balance schedule and the lender’s payment-allocation rules are needed.

Frequently Asked Questions

How do you calculate a business term loan payment?
Convert APR to a monthly decimal rate by dividing by 1,200, convert the term to months, then apply the fixed-payment amortization formula shown above. The result assumes a fixed rate and equal monthly payments.

Does the monthly payment include fees?
No. This calculator estimates principal and interest only. Check the lender’s disclosure for fees or other charges and whether they are paid separately or included in the financed balance.

Why can a lender’s payment differ from this estimate?
Differences can arise from fees, payment timing, rate conventions, rounding, a variable rate, or a schedule that is not fully amortizing. The calculator also does not model irregular installments or balloon payments.

Does a longer term reduce total interest?
Not necessarily. With a positive fixed rate and equal monthly payments, a longer term usually lowers each payment but extends the time interest accrues, increasing modeled total interest compared with a shorter term for the same principal and rate.

Can I use this for an early payoff amount?
No. An early payoff figure depends on the outstanding balance, payoff date, accrued interest, and agreement-specific details. Request a payoff figure from the lender.

Can this estimate show whether a business will qualify?
No. It calculates payments from the inputs only. It does not assess eligibility, approval, or a business’s ability to make payments.

This result is an estimate for educational purposes; 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