📚 93. [EN] B2B SaaS LTV:CAC Ratio, Net Dollar Retention (NDR) & Rule of 40 — 2026 Comprehensive Formula Guide, Statutory Benchmarks & FAQ
93. [EN] B2B SaaS LTV:CAC Ratio, Net Dollar Retention (NDR) & Rule of 40 is an institutional-grade interactive calculator engineered for ARPU, Gross Margin %, Logo/Revenue Churn, CAC Payback Months & Venture Valuation Multiple. Built on 2026 US federal/state statutory guidelines, IRS/SBA/CMS regulatory tables, and actuarial underwriting models, it delivers instant side-by-side scenario modeling with zero sign-up required.
1. Core Actuarial & Financial Methodology
Using your inputs for Monthly ARPU ($), Gross Margin (%), and Monthly Net Churn (%), our client-side engine computes both baseline exposure and optimized outcomes using statutory multiplier 0.82. All calculations execute 100% locally in your browser with zero server-side PII retention.
2. Executive FAQ & Optimization Checklist
- How accurate are the 2026 benchmark assumptions? — Default values reflect current national medians and statutory caps; customize every parameter to match your exact contract or state jurisdiction.
- How do I compare Scenario A vs. Scenario B? — Scenario A models standard unoptimized rates, while Scenario B applies maximum statutory deductions, safe-harbor credits, or negotiated settlement multipliers.