Small Business Loan Calculator

Enter your loan amount, interest rate, and term to see the monthly payment, total interest, and total borrowing cost — including how an origination fee changes your true APR. Everything runs in your browser; nothing is sent anywhere.

📖 How it works & FAQ

Loan amount ($)

Interest rate (APR %)

Loan term

Term unit

Origination fee (% of loan, optional)

What this calculator shows you

Most business loan quotes lead with a monthly payment, but the payment alone hides two bigger numbers: total interest and the origination fee. This calculator uses the standard amortization formula — M = P×r ÷ (1 − (1+r)⁻ⁿ), where r is the monthly rate and n the number of payments — to show your payment, lifetime interest, and total borrowing cost side by side. If you enter an origination fee, it also solves for the effective APR: because the fee is typically deducted from your proceeds, you are really paying the same installments on less money, so your true rate is higher than the sticker APR. All figures are estimates only, not professional, tax, or financial advice — real lender rates and fees vary and change, so edit every assumption to match your actual quote.

How to use it

Enter the loan amount you plan to borrow.
Type the annual interest rate (APR) from your quote or term sheet.
Set the term and pick years or months — SBA-style loans often run 5–10 years, while online term loans are frequently 6–36 months.
Add the origination fee percentage if your lender charges one (set it to 0 if not).
Results update instantly as you type — compare offers by changing one number at a time.

FAQ

Why is my effective APR higher than the rate I was quoted?: An origination fee is usually withheld from the funds you receive. If you borrow $75,000 with a 2% fee, you only get $73,500 but repay as if you got the full amount, which pushes the true annualized cost above the stated APR.
Does this work for SBA 7(a) loans?: Yes, for the amortized payment math. SBA loans add a guaranty fee and may have variable rates, so treat the result as a baseline and enter the guaranty fee in the fee field for a closer estimate.
What about daily or weekly repayment products?: Merchant cash advances and daily-debit loans use factor rates, not APR amortization. Convert the factor rate to an approximate APR first, or the comparison will understate their cost.
Is my financial data uploaded anywhere?: No. Every calculation runs in your browser with plain JavaScript — nothing is stored or sent to a server.