Commercial borrowing estimate

Business Loan Calculator

Estimate monthly payments, total interest, upfront fees and an APR estimate for a fixed-rate business loan.

Loan and fee inputs

Enter the proposed financing terms

Business loan
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Loan summary

Payment and borrowing cost

Your business loan estimate will appear here

Enter the loan amount, annual rate, a term of at least one month, and any lender fees.

What is Business Loan ?

Use this business loan calculator to estimate monthly payments, total interest, upfront fees and an APR estimate for a fixed-rate business loan.

Compare a proposed equipment purchase, inventory order or working capital loan before discussing the figures with a lender. Enter the amount borrowed, annual interest rate, repayment term and any quoted fees. The results separate the monthly repayment commitment from the total cost of borrowing.

How the business loan estimate works

The calculator spreads principal and interest across equal monthly payments. It then adds your entered fees to the cost summary and estimates an annualized borrowing rate using the funds available after those fees. Fees are treated as upfront charges, rather than added to the balance on which the monthly payment is calculated. The doughnut chart separates principal, interest and fees; each slice is a money amount.

How to Use This Calculator

  1. Loan amount: Enter the contractual principal in dollars, before subtracting upfront fees. Use the same currency for every money input.
  2. Annual interest rate: Enter the quoted annual percentage rate of interest, such as 8.4 for 8.4%. Do not enter a decimal of 0.084, a factor rate or a fee-inclusive APR in place of the interest rate.
  3. Loan term years and Additional term months: Enter the complete repayment period. Four years and six months means 54 monthly payments. Additional months must be from 0 to 11; the combined term must be at least one month. Enter 0 in an unused term field.
  4. Origination fee: Enter a percentage of principal. For a 2% fee, enter 2. Enter Documentation fee and Other fees as dollar amounts charged once. Leave an optional fee blank or enter 0 when it does not apply.
  5. Select Estimate business loan. Read the monthly payment, scheduled payments, interest, fees, estimated APR and total repayment including fees. Change one assumption at a time to compare offers.

Keep the lender's quote nearby. The input examples are placeholders, not a current offer or a promise that your business qualifies for those terms.

Formula Used

Let P be the principal, a the entered annual interest percentage, n the number of monthly payments and M the monthly payment.

n = 12 × years + additional months
r = a ÷ 1,200
M = P × r ÷ [1 − (1 + r)−n]

At zero interest, M = P ÷ n. Each month's interest is based on the remaining balance; the rest of that payment reduces principal. The model assumes payments at the end of equal monthly periods.

F = P × origination percentage ÷ 100 + documentation fee + other fees
Scheduled payments = M × n.
Total interest = M × n − P.
Total repayment including fees = M × n + F.
Borrowing cost excluding principal = M × n − P + F.

How the APR estimate accounts for fees

The calculator finds a monthly rate j for which the present value of all monthly payments equals P − F: P − F = Σ M ÷ (1 + j)k, summed from k = 1 to n. It reports j × 12 × 100 as an annual percentage. This is a nominal annualized estimate, not the compounded effective annual rate [(1 + j)12 − 1] × 100. It assumes all entered fees reduce the funds available at the start and does not establish a legally required disclosure APR.

Totals use the unrounded payment before being rounded to cents. Multiplying a displayed monthly payment by the term can therefore differ by a few cents.

Variables Explained

Business loan inputs and results
Input or resultMeaning and units
Loan amount (P)Principal borrowed in dollars. It is the payment calculation's starting balance.
Annual interest rate (a)Annual percentage applied through twelve monthly periods; separate from the fee-adjusted APR estimate.
Loan term (n)Total monthly payments, calculated from years plus additional months.
Origination feePercentage of principal charged once. A 2% fee on $80,000 is $1,600.
Documentation fee and Other feesOne-time dollar amounts. Include each charge once.
Estimated monthly payment (M)Principal and interest due each month. Upfront fees are separate.
Total scheduled loan paymentsAll modeled monthly payments combined, including returned principal.
Total interestScheduled loan payments minus the principal borrowed.
Total entered fees (F)Origination charge plus documentation and other fees.
Total repayment including feesScheduled payments plus upfront fees, representing the modeled overall cash outlay.
Estimated APRFee-adjusted monthly borrowing rate multiplied by twelve, shown as an annual percentage.

Worked Example

A workshop is considering an $80,000 equipment loan at 8.4% annual interest over four years. The lender quotes a 2% origination fee, a $350 documentation fee and $150 in other upfront fees. Enter 4 years and 0 additional months.

  1. Convert the rate and term: r = 8.4 ÷ 1,200 = 0.007; n = 4 × 12 = 48.
  2. Calculate the payment: $80,000 × 0.007 ÷ [1 − 1.007−48] = $1,968.09 per month, rounded.
  3. Calculate fees: $80,000 × 2% + $350 + $150 = $2,100.00.
  4. Using the unrounded payment, scheduled payments total $94,468.29. Subtract $80,000 to obtain $14,468.29 interest.
  5. Add fees for $96,568.29 total repayment including fees. Interest plus fees is $16,568.29, excluding returned principal.

For the APR estimate, the modeled funds available are $80,000 − $2,100 = $77,900. Discounting 48 monthly payments to that amount gives an annualized estimate of 9.795%. The quoted 8.4% interest rate and this fee-adjusted estimate describe different parts of the borrowing cost.

What if the repayment term is longer?

Same $80,000 principal, 8.4% interest and $2,100 fees; only the term changes
Result4 years6 years
Monthly payment$1,968.09$1,418.34
Total interest$14,468.29$22,120.16
Total including fees$96,568.29$104,220.16
Estimated APR9.795%9.365%

The six-year option lowers the monthly commitment by about $549.75 but adds $7,651.87 in interest. Its lower annualized APR does not mean fewer total dollars paid: the fee is spread across a longer borrowing period.

Why Use This Calculator?

Use the payment estimate to test whether a proposed loan fits an operating budget, then compare the total cost across offers. A business with seasonal revenue should consider quieter months as well as its annual average. This calculator does not collect revenue or operating expenses, so it cannot determine affordability, debt service coverage or approval eligibility.

Compare the same amount, timing and fee treatment

Ask each lender for the funds you will receive, the payment schedule, all fees and any early repayment conditions. Compare offers for the same principal and term before attributing a payment difference to price. The chart shows where the modeled total goes; it does not show the business's cash balance or future profit.

Where the estimate needs a separate check

The model does not handle daily or weekly collections, variable interest rates, revolving credit, balloon payments, payment holidays, extra repayments or merchant cash advances priced with a factor rate. It does not automatically calculate SBA program fees, tax effects, late charges or prepayment penalties. A fixed-rate SBA term loan can be explored using its quoted inputs, but this is not an SBA eligibility or guarantee calculator.

For an APR estimate, entered fees must be less than principal. If fees equal or exceed principal, this implementation displays 0% APR even though that is not a valid borrowing-rate estimate. Do not interpret that output as free financing. Extremely costly arrangements can also exceed the rate search range. Verify the actual cash flows and written lender terms before relying on a result.

Common Mistakes

  • Entering APR or a factor rate in the Annual interest rate field, then adding the same fees again. Use the quoted interest rate and itemized charges.
  • Entering a dollar origination charge as a percentage. Convert a $1,600 charge on $80,000 to 2%, or place a fixed charge in an appropriate dollar fee field once.
  • Increasing the loan amount to finance fees while also entering those fees as upfront charges. That does not match this model's cash-flow assumption.
  • Choosing a longer term only because its payment or APR is lower. Check total interest and the full repayment period too.
  • Assuming the chart measures profitability or that the estimate proves the business can afford the debt.
  • Treating 0% APR as reliable when entered fees consume all loan proceeds.

Frequently Asked Questions

Does an origination fee increase the monthly payment?

Not in this calculator. Payment is based on principal, interest rate and term. Entered fees are added separately to total repayment and reduce the modeled net proceeds for the APR estimate. If your lender finances fees into the balance, confirm how that changes the actual agreement.

What is the difference between interest rate and estimated APR?

The interest rate sets the monthly principal-and-interest payment. The APR estimate also reflects the entered upfront fees through reduced net proceeds. Compare APR with APR under equivalent assumptions, rather than comparing one offer's interest rate with another offer's fee-adjusted rate.

Does the calculator show an effective annual interest rate?

No. Its APR estimate multiplies a fee-adjusted monthly rate by twelve. It does not compound that monthly rate for twelve periods. This distinction matters when comparing a quote explicitly labeled as an effective annual rate.

Can I enter a term shorter than one year?

Yes. Enter 0 for Loan term years and 1 through 11 for Additional term months. For a 30-month loan, enter 2 years and 6 months. A combined term of zero months is not accepted.

What happens with a zero-interest business loan?

The principal is divided evenly across the payment count. A $12,000 loan over 12 months has a $1,000 monthly payment. Upfront fees can still create a positive borrowing cost and a positive APR estimate even when the entered interest rate is zero.

Can this calculate an SBA loan payment?

It can estimate a fixed-rate SBA term loan with equal monthly payments when you supply the actual quoted principal, rate, term and applicable upfront fees. It does not determine program eligibility, calculate SBA guarantee fees automatically or model future variable-rate changes.

Is a lower monthly payment always a cheaper loan?

No. In the worked comparison, extending the loan from four to six years reduces the monthly payment but increases interest by $7,651.87. Compare total dollars, term and payment timing as well as the monthly commitment.

Can I use a factor rate or model early repayment?

No. Enter an annual interest percentage for an amortizing loan. A factor rate describes a different pricing convention, and this calculator has no extra-payment or early-settlement inputs. Request the lender's schedule and payoff terms for those arrangements.

Sources & References