The 20-second answer
Your SBA 7(a) monthly payment is driven by three numbers: the loan amount, the interest rate (WSJ Prime + your lender's spread), and the term (usually 10 years for a business, 25 if real estate is included). A $1,000,000 loan at 10.5% over 10 years costs about $13,493/month roughly $162,000 a year in debt service the business has to cover before it pays you.
How the SBA loan calculator works
An SBA 7(a) loan is a standard fully-amortizing loan: you pay the same amount every month, and each payment covers the interest owed that month first, with whatever's left reducing the balance. Early on, most of the payment is interest; later, most of it is principal. The math is the classic amortization formula:
Payment = P × r ÷ (1 − (1 + r)−n)
- P = loan amount (principal)
- r = monthly interest rate = annual rate ÷ 12
- n = total number of payments = term in years × 12
This calculator runs that formula, then builds the year-by-year schedule so you can see exactly how the balance falls.
What interest rate to enter
Most SBA 7(a) loans carry a variable rate tied to the Wall Street Journal Prime Rate 6.75% as of July 2026 plus a lender spread. The SBA caps that spread, so bigger loans get better rates:
| Loan size | Maximum spread over Prime | Approx. max rate |
|---|---|---|
| $50,000 or less | Prime + 6.5% | 13.25% |
| $50,001, $250,000 | Prime + 6.0% | 12.75% |
| $250,001, $350,000 | Prime + 4.5% | 11.25% |
| Over $350,000 | Prime + 3.0% | 9.75% |
Rate structure per SBA 7(a) maximum-allowable-rate rules and lender rate trackers, July 2026. Caps are regulatory maximums, most borrowers pay less. Verify your quote with your lender.
For a typical six- or seven-figure acquisition loan, a planning rate of 10.5% is reasonable until you have a real quote. Fixed-rate 7(a) loans exist but usually price higher than variable.
Practitioner note
Don't calculate the payment on the purchase price, calculate it on the loan. Your equity injection (usually 10%), any seller note on standby, and financed closing costs all change the number you actually borrow.
Choosing the loan term
Term length is the single biggest lever on your monthly payment:
- 10 years the standard for buying a business with no real estate. SBA 7(a) allows up to 10 years for business acquisition, equipment, and working capital.
- 25 years available when the deal includes owner-occupied commercial real estate. A blended or 25-year term dramatically lowers the payment and lifts your DSCR.
7(a) loans with terms under 15 years have no prepayment penalty, so a longer term buys you lower required payments and the freedom to pay down faster in good years.
About the SBA guaranty fee
The SBA charges a one-time guaranty fee based on the guaranteed portion of the loan. It's normally rolled into the loan amount rather than paid monthly, which is why this calculator treats it as optional. It's a real closing cost, though, check the box above to fold a rough estimate into the balance, and get the exact figure from your lender, since fee schedules change by SBA fiscal year and loan size.
The number lenders actually care about
A monthly payment only matters relative to the cash the business throws off. Lenders divide the business's cash flow by its annual debt service to get the Debt Service Coverage Ratio (DSCR) and most SBA lenders want at least 1.15×, 1.25×. Once you know your payment here, run the deal's cash flow through the DSCR calculator to see if it clears the bar.
Want the whole capital stack, not just the payment?
See how the 10% injection, seller notes, and working capital fit together in a real SBA deal.
Frequently asked questions
Most 2026 acquisition loans run about 9.5%, 11.75% variable, WSJ Prime (6.75%) plus a lender spread. Loans over $350,000 are capped at Prime + 3.0% (9.75%). Use your lender's quote; 10.5% is a fair placeholder before you have one.
Up to 10 years for a business with no real estate; up to 25 years when owner-occupied real estate is included. Longer terms lower the monthly payment. No prepayment penalty under 15-year terms.
The core result is principal and interest only. The guaranty fee is a one-time upfront cost usually financed into the loan, tick the checkbox to add a rough estimate, and confirm the exact amount with your lender.
On a fixed-rate loan, yes. On a variable-rate 7(a) loan the payment resets when Prime changes, usually monthly or quarterly. Re-run this calculator at the new rate to see the updated payment.
This tool is for education and planning only, not a loan offer, quote, or financial advice. Actual terms depend on your lender, credit, and the specific deal.
