SBA + 13 CFR Part 120
Small Business Financing Calculators
SBA 7(a) loan payment, guarantee fee, and DSCR underwriting math — the financial primitives small-business owners and acquirers need before they walk into a lender.
Anchored to: 15 USC §§ 631 et seq.; 13 CFR Part 120; SBA SOP 50 10 7.1; 31 USC § 5336
2 calculators live. Reviewed against current statute and regulation. Last updated 2026-05-16.
Most-used calculators
Small Business Act
SBA 7(a) Loan Payment + DSCR Calculator
Run the same two numbers SBA 7(a) lenders run on every credit memo: the fixed-rate monthly principal-and-interest payment under standard amortization, and the Debt Service Coverage Ratio (DSCR = business NOI ÷ annual debt service) — the ratio actually underwritten to under SBA Standard Operating Procedure 50 10 7.1. Inputs the loan amount, fixed-vs-variable rate election, term in years (10 for working capital, 25 for owner-occupied real estate under 13 CFR § 120.212), Wall Street Journal Prime Rate, lender spread, and business NOI. Outputs monthly P&I, total interest over the life of the loan, the current SBA guarantee fee under 13 CFR § 120.220 + SOP 50 10 7.1 (waived at 0% for loans ≤ $1M in the current fiscal year), annual debt service, DSCR against the conventional 1.15 underwriting floor, the NOI required to hit that floor, and the funding gap if NOI falls short. Variable-rate spreads are checked against the regulatory ceilings under 13 CFR § 120.214 (Prime + 6.5% on loans ≤ $50K, sliding down to Prime + 3.0% on loans > $350K).
Corporate Transparency Act
BOI Reporting Penalty Calculator (Corporate Transparency Act)
Surface the federal penalty exposure for missing a Beneficial Ownership Information (BOI) report under the Corporate Transparency Act (31 U.S.C. § 5336) and the implementing rule at 31 CFR § 1010.380. Resolves the applicable filing deadline by formation regime — pre-2024 entities had until January 1, 2025, 2024-formation entities had 90 calendar days, and 2025-and-after-formation entities have 30 calendar days. Computes civil penalty exposure at $591/day (2025 inflation-adjusted under 31 U.S.C. § 5321), flags the criminal exposure for willful violations (fines up to $10,000 + up to 2 years imprisonment under § 5336(h)(3)), applies the 90-day safe harbor for inadvertent inaccuracies under § 5336(h)(3)(C), screens the large-operating-company exemption (more than 20 full-time U.S. employees, U.S. physical office, more than $5M gross receipts), and emits corrective-action guidance pointing at the FinCEN BOI E-Filing portal. Surfaces a verify-FinCEN-guidance caveat reflecting the ongoing post-NSBU v. Yellen litigation and interim final rules through 2024-2025.
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Grouped by who tends to use each tool. Many calculators serve more than one audience.
For unit owners
Verify a notice, check a fine, or understand the lien exposure on a delinquent account before acting.
SBA 7(a) Loan Payment + DSCR Calculator
Run the same two numbers SBA 7(a) lenders run on every credit memo: the fixed-rate monthly principal-and-interest payment under standard amortization, and the Debt Service Coverage Ratio (DSCR = business NOI ÷ annual debt service) — the ratio actually underwritten to under SBA Standard Operating Procedure 50 10 7.1. Inputs the loan amount, fixed-vs-variable rate election, term in years (10 for working capital, 25 for owner-occupied real estate under 13 CFR § 120.212), Wall Street Journal Prime Rate, lender spread, and business NOI. Outputs monthly P&I, total interest over the life of the loan, the current SBA guarantee fee under 13 CFR § 120.220 + SOP 50 10 7.1 (waived at 0% for loans ≤ $1M in the current fiscal year), annual debt service, DSCR against the conventional 1.15 underwriting floor, the NOI required to hit that floor, and the funding gap if NOI falls short. Variable-rate spreads are checked against the regulatory ceilings under 13 CFR § 120.214 (Prime + 6.5% on loans ≤ $50K, sliding down to Prime + 3.0% on loans > $350K).
BOI Reporting Penalty Calculator (Corporate Transparency Act)
Surface the federal penalty exposure for missing a Beneficial Ownership Information (BOI) report under the Corporate Transparency Act (31 U.S.C. § 5336) and the implementing rule at 31 CFR § 1010.380. Resolves the applicable filing deadline by formation regime — pre-2024 entities had until January 1, 2025, 2024-formation entities had 90 calendar days, and 2025-and-after-formation entities have 30 calendar days. Computes civil penalty exposure at $591/day (2025 inflation-adjusted under 31 U.S.C. § 5321), flags the criminal exposure for willful violations (fines up to $10,000 + up to 2 years imprisonment under § 5336(h)(3)), applies the 90-day safe harbor for inadvertent inaccuracies under § 5336(h)(3)(C), screens the large-operating-company exemption (more than 20 full-time U.S. employees, U.S. physical office, more than $5M gross receipts), and emits corrective-action guidance pointing at the FinCEN BOI E-Filing portal. Surfaces a verify-FinCEN-guidance caveat reflecting the ongoing post-NSBU v. Yellen litigation and interim final rules through 2024-2025.
For attorneys
Statutory citation-level analysis suitable for client memoranda and procedural verification.
SBA 7(a) Loan Payment + DSCR Calculator
Run the same two numbers SBA 7(a) lenders run on every credit memo: the fixed-rate monthly principal-and-interest payment under standard amortization, and the Debt Service Coverage Ratio (DSCR = business NOI ÷ annual debt service) — the ratio actually underwritten to under SBA Standard Operating Procedure 50 10 7.1. Inputs the loan amount, fixed-vs-variable rate election, term in years (10 for working capital, 25 for owner-occupied real estate under 13 CFR § 120.212), Wall Street Journal Prime Rate, lender spread, and business NOI. Outputs monthly P&I, total interest over the life of the loan, the current SBA guarantee fee under 13 CFR § 120.220 + SOP 50 10 7.1 (waived at 0% for loans ≤ $1M in the current fiscal year), annual debt service, DSCR against the conventional 1.15 underwriting floor, the NOI required to hit that floor, and the funding gap if NOI falls short. Variable-rate spreads are checked against the regulatory ceilings under 13 CFR § 120.214 (Prime + 6.5% on loans ≤ $50K, sliding down to Prime + 3.0% on loans > $350K).
BOI Reporting Penalty Calculator (Corporate Transparency Act)
Surface the federal penalty exposure for missing a Beneficial Ownership Information (BOI) report under the Corporate Transparency Act (31 U.S.C. § 5336) and the implementing rule at 31 CFR § 1010.380. Resolves the applicable filing deadline by formation regime — pre-2024 entities had until January 1, 2025, 2024-formation entities had 90 calendar days, and 2025-and-after-formation entities have 30 calendar days. Computes civil penalty exposure at $591/day (2025 inflation-adjusted under 31 U.S.C. § 5321), flags the criminal exposure for willful violations (fines up to $10,000 + up to 2 years imprisonment under § 5336(h)(3)), applies the 90-day safe harbor for inadvertent inaccuracies under § 5336(h)(3)(C), screens the large-operating-company exemption (more than 20 full-time U.S. employees, U.S. physical office, more than $5M gross receipts), and emits corrective-action guidance pointing at the FinCEN BOI E-Filing portal. Surfaces a verify-FinCEN-guidance caveat reflecting the ongoing post-NSBU v. Yellen litigation and interim final rules through 2024-2025.
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Unit tests
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How these calculators are maintained
Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.
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