How to Use the Business Loan Calculator
Nearly 60% of small business owners who apply for a loan are surprised by the true total cost once fees are factored in. The stated interest rate tells only part of the story. This calculator shows you the full picture — monthly payment, total interest, all-in fees, true APR, and a complete amortization schedule — before you walk into a lender's office.
Select your loan type from the tabs, enter the loan amount, rate, and term, add any origination or closing fees, and click Calculate. The results update completely with every calculation. Use the Extra Monthly Payment field to see exactly how much interest you save by paying above the minimum — on a $150,000 loan, even $500 extra per month can eliminate over a year of payments.
US Business Loan Types and Their Typical Terms
Standard Term Loans
A conventional business term loan provides a lump sum repaid over a fixed period with equal monthly payments. Bank term loans typically range from $10,000 to $5 million with terms of 1–10 years. Rates for qualified borrowers (680+ credit score, 2+ years in business, strong revenue) run 7%–12% from banks, and 10%–30%+ from online lenders. Origination fees of 1%–5% are standard and meaningfully affect the true APR.
SBA 7(a) Loans
The SBA's flagship loan program offers the most borrower-friendly terms available for small businesses. Loan amounts up to $5 million, terms up to 10 years for working capital (25 years for real estate), and government-backed guarantees that allow lenders to offer lower rates than conventional products. The SBA caps rates at Prime + 2.75% for most loans — making them among the most affordable business financing available to qualified borrowers.
The SBA guarantee fee (0.25%–3.5% of the guaranteed portion) is the main cost difference from conventional loans. Enter it in the Other Fees field to see its full APR impact. SBA 7(a) loans require a personal guarantee and typically 10% down for business acquisitions.
SBA 504 Loans
The 504 program is specifically for major fixed asset purchases — commercial real estate and large equipment. It combines a conventional bank loan (50% of project cost) with a CDC loan at a fixed rate (40%) and a 10% borrower equity injection. The CDC portion offers below-market fixed rates for 10, 20, or 25 years, making it the most cost-effective option for commercial property acquisitions. Use the calculator for each loan portion separately.
Equipment Financing
Equipment loans use the equipment itself as collateral, which reduces lender risk and typically produces lower rates (5%–15%) than unsecured business loans. Terms match the useful life of the equipment — typically 3–7 years for vehicles and technology, up to 10 years for heavy machinery. Some equipment financing structures include a balloon payment equal to the equipment's projected residual value, keeping monthly payments lower. Toggle the Balloon Payment option to model this structure.
Business Lines of Credit
A line of credit provides revolving access to funds up to a credit limit, with interest charged only on the drawn balance. For this calculator, enter the drawn balance as the loan amount and use the draw period as the term. Most lines of credit carry variable rates (Prime + 1%–4.5%), so enter your current rate understanding that payments will adjust with rate changes.
Understanding True APR
The True APR calculation in this tool uses the Newton-Raphson iterative method — the same mathematical approach required by the Truth in Lending Act (TILA) for lender disclosures. It solves for the rate that equates the present value of all scheduled payments to the net loan proceeds (loan amount minus all upfront fees). A loan with a 7% rate and a 3% origination fee on a 5-year term has a true APR closer to 8.5% — a difference that changes your comparison of competing loan offers significantly.
Balloon Payments in Commercial Lending
Commercial real estate loans frequently use balloon structures: the loan amortizes over 25–30 years but the full remaining balance becomes due after 5–10 years. Monthly payments are calculated as if the loan runs to full amortization — keeping them manageable — but the borrower must refinance or pay off the balloon at maturity. Toggle the Balloon Payment option and set the balloon month to model this structure. The calculator shows the balloon amount as a separate metric so you can plan the refinancing need.
DSCR: What Lenders Check Before You Do
Before any lender runs your credit, they calculate your Debt Service Coverage Ratio: annual net operating income divided by annual debt payments. The minimum acceptable DSCR for most SBA and bank loans is 1.25. Use the Annual Debt Service figure from this calculator — your monthly payment multiplied by 12 — to calculate your DSCR before applying. If it falls below 1.25, consider a smaller loan amount or longer term to bring the payment down.
Important Disclaimer
This calculator produces estimates for planning and comparison purposes. Actual loan terms, rates, fees, and approval are determined by lenders based on your business financials, credit profile, collateral, and lender-specific policies. SBA loan terms and fee structures are subject to change by the SBA. Consult an SBA-approved lender or SCORE business advisor before making financing decisions.