What will the loan cost each month — and will the bank say yes?

• Payment. Standard level-payment amortization: P × r ÷ (1 − (1 + r)−n) with r = annual rate ÷ 12 and n = months. SBA 7(a) loans are fully amortizing with no balloon; variable-rate loans re-amortize when the rate changes, which this calculator does not simulate.
• SBA 7(a) rate. Maximum = base rate + spread by loan size (13 CFR 120.214; SOP 50 10 8.1): Prime + 6.5% up to $50,000; + 6% to $250,000; + 4.5% to $350,000; + 3% above $350,000. Prime defaults to 7.00% (effective September 17, 2026). Uncheck the maximum to enter the spread your lender quoted.
• SBA 7(a) guaranty fee (FY2027, loans approved October 1, 2026 – September 30, 2027): 2% of the guaranteed portion for loans ≤ $150,000; 3% for $150,001–$700,000; for $700,001–$5,000,000, 3.5% of the guaranteed portion up to $1,000,000 plus 3.75% of the guaranteed portion above that. Guaranty is 85% for loans ≤ $150,000 and 75% above. Loans with maturities of 12 months or less pay 0.25%. The 0.55% annual service fee is paid by the lender and cannot be passed through.
• SBA 504. Project financed 50% by a bank first lien at your rate, up to 40% by a CDC debenture at the current effective rate (6.97% for 20- and 25-year debentures in October 2026, fees included; changes monthly), and the balance by the borrower (10% / 15% / 20%). The two notes amortize separately; the blended rate and combined payment are shown.
• Effective APR is the internal rate of return that equates the cash you actually receive (loan less closing costs and any fee paid in cash) with the payments you make, annualized. It is the honest comparison between a low-rate loan with heavy fees and a higher-rate loan without them.
• DSCR = (EBITDA + accepted owner add-backs) ÷ (existing annual debt service + new annual debt service). Minimums under SOP 50 10 8.1 (effective October 1, 2026): 1.15× for standard 7(a) (historical and/or projected, plus 1:1 global), 1.10× for 7(a) Small loans not involving a change of ownership, 1.25× for initial acquisitions, owner buyouts and ESOPs, 1.15× for 504. Conventional lenders commonly require 1.20–1.25×. Maximum loan is the present value, at the loan rate and term, of the debt service your cash flow can carry at the target DSCR after existing obligations.
• Not modeled. Variable-rate resets, interest-only periods, the SBA Express 50% guaranty, prepayment penalties, lender packaging fees beyond what you enter, personal (global) cash flow, collateral coverage and credit scoring — all of which also affect approval.

This calculator is an educational estimate built from published figures and the assumptions listed above. It is not tax, legal, or financial advice, does not account for every provision that may apply to you, and is not a substitute for a return prepared from your actual records. Figures are checked when published and may lag mid-year changes.