How is a business loan monthly payment calculated?

A standard amortizing loan payment is a function of three inputs: the principal (amount borrowed), the interest rate, and the term (number of months). The calculator applies the amortization formula so each payment covers interest plus a slice of principal. Change any input and the payment moves — a longer term lowers the monthly payment but raises total interest.

What's the difference between interest rate and APR?

The interest rate is the cost of the principal alone; APR (annual percentage rate) folds in fees — origination, guarantee, packaging — so it reflects the true annual cost. Always compare offers on APR, not the headline rate, because two loans with the same rate can have very different APRs once fees are included.

How do I calculate the cost of a merchant cash advance or factor-rate product?

Factor-rate products (like merchant cash advances) don't use an interest rate — you multiply the amount by the factor (e.g. 1.4) to get the fixed payback. To compare it to a loan, convert that fixed cost to an effective APR, which is usually far higher than a term loan because the payback is fixed regardless of how fast you repay.

Does using a loan calculator affect my credit?

No. A calculator just does math — it doesn't pull your credit or submit an application. Checking your actual rate with most online lenders uses a soft credit inquiry that doesn't affect your score; only a formal application triggers a hard pull.

Business Loan Calculator: Estimate Payments, Interest & APR

Use our business loan calculator to estimate monthly payments, total interest, and true APR — with worked examples for term loans, SBA loans, and lines of credit.

A business loan calculator estimates your monthly payment, total interest, and true cost from three inputs: amount, interest rate (or APR), and term in months. Use it before you apply to size a loan you can actually service — a longer term lowers the monthly payment but increases total interest, and comparing offers on APR (not the headline rate) is the only way to see the real cost.

Before signing anything, you should know exactly what a loan will cost each month and in total. Run your numbers below, then read on for how the math works by product — because a "10% rate" means very different things on a 5-year term loan versus a 12-month cash advance.

The short version

Three inputs drive every payment: amount, rate/APR, and term. Longer term = lower monthly payment but more total interest. Compare offers on APR, not the rate, so fees are included. Factor-rate products (MCAs) have a fixed payback — convert to APR to compare honestly.

Estimate your payment

Adjust the amount, term, and rate range to see your estimated monthly payment. The range reflects typical pricing for a general small-business term loan:

Estimate your monthly payment

A representative estimate at 8%–30% APR. Actual rates and terms vary by business and product.

Amount

Term (months)

$3,235– $2,028 / mo (est.)

The same loan, three products

A given amount costs wildly different amounts depending on the product. Here's $100,000 across the common options:

$100,000 across common products (illustrative — varies by lender & profile)
Product	Typical APR	Typical term	Relative cost
SBA 7(a) loan	~10.5–15%	Up to 10 yrs	Lowest
Bank/online term loan	~8–30%	1–5 yrs	Low–moderate
Business line of credit	~10–25%	Revolving	Pay only on what you draw
Merchant cash advance	40–150%+ effective	Fixed payback	Highest

The cheapest money (an SBA loan) takes weeks to close; the most expensive (a merchant cash advance) funds in days. Match the product to whether speed or cost matters more for your need.

Rate vs. APR — compare on APR

Two offers can quote the same 12% rate but carry different APRs once you add origination or packaging fees. Always ask for the APR and compare on that. Our business loan interest rates guide breaks down what drives your rate.

Longer term ≠ cheaper loan

Stretching a loan over a longer term lowers the monthly payment, which helps cash flow — but you pay interest for longer, so total cost rises. Pick the shortest term whose payment your cash flow comfortably covers, not the lowest possible monthly number.

How to use the estimate

Size to cash flow, not the max

Borrow the amount whose payment your slow-month revenue can still cover — not the largest sum you're offered.

Stress-test the payment

Re-run the calculator at the high end of the rate range and a shorter term. If that payment still works, you have margin.

Compare real offers on APR

Use a soft-pull pre-qualification to get actual numbers, then compare them on APR — not the headline rate.

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The bottom line

A loan calculator turns a scary number into a monthly payment you can judge against your cash flow. Size the loan to what a slow month can service, stress-test it at the high end, and compare every offer on APR. Do that and you'll borrow an amount that helps the business instead of straining it.