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SBA Loan Calculator

SBA loan payment calculator.

Model monthly payments and total interest for SBA 7(a), SBA 504, and SBA microloans. Adjust principal, rate, and term to see exactly what your SBA loan will cost over its life.

Monthly payment$6,747
Total paid (life of loan)$809,610
Total interest$309,610
How the SBA calculator works: Standard amortization formula M = P(r(1+r)^n)/((1+r)^n−1), where r is the monthly rate. SBA 7(a) rates float with WSJ Prime (capped by SBA at Prime + 3.0% for loans over $50K with 7+ year terms). 504 rates are partly fixed via the CDC debenture. Estimates exclude packaging fees, third-party reports, and closing costs.
Next step

See real SBA 7(a) offers at $500,000.

We'll route your inputs to lenders that fund this profile and email the top 2–3 offers. No credit pull.

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FAQ

SBA loan calculator, answered.

How is an SBA loan payment calculated?+

SBA 7(a) and 504 loans use standard amortizing payments: M = P × (r(1+r)^n) / ((1+r)^n − 1), where P is principal, r is the monthly rate, and n is the term in months. Rates float over the Wall Street Journal Prime Rate (currently ~8.00%), capped by SBA at Prime + 3.0% for loans over $50K with a 7+ year term.

What's the maximum SBA loan amount?+

SBA 7(a) loans go up to $5,000,000. SBA Express maxes at $500,000. SBA 504 loans (real estate / heavy equipment) can exceed $5.5M on the SBA portion alone. SBA microloans cap at $50,000.

What are current SBA loan rates?+

SBA 7(a) rates are typically WSJ Prime + 1.5%–3.0% (≈9.5%–11%). SBA 504 rates run 6%–8% (the CDC portion is fixed for the life of the loan). Microloans average 8%–13%. Summit's calculator lets you model any rate to compare to alternative offers.

How long are SBA loan terms?+

Working capital and equipment SBA loans go up to 10 years. Real estate SBA loans go up to 25 years. Longer terms mean lower monthly payments but more total interest.

Do SBA loans have a down payment?+

Yes. SBA 7(a) typically requires 10% equity injection for a business acquisition or startup. SBA 504 requires 10% from the borrower (15% for startups or special-use property). Summit can structure the equity injection from seller financing, retirement rollover (ROBS), or sponsor capital.

What's the difference between SBA 7(a) and 504?+

SBA 7(a) is a general-purpose loan — working capital, acquisitions, refinancing, equipment, real estate. SBA 504 is purpose-built for owner-occupied commercial real estate and heavy equipment, with lower fixed rates but tighter use of proceeds.