Rule of 40 for SaaS at Seed
2026 data · Sample size: 137 · Source: Tomasz Tunguz Venture Data 2025
About This Metric
Sum of revenue growth rate and profit margin should exceed 40% for a healthy SaaS company.
Higher is better · Unit: percentage
How to Improve
Ehsan's Analysis
The Rule of 40 (revenue growth rate + profit margin ≥ 40%) remains the most cited SaaS efficiency metric, but it needs updating for the 2025-2026 market. Pre-2022, growth was weighted more heavily — a company growing 80% with -40% margins scored 40 and was celebrated. Post-2023, investors weight profitability more heavily using the "Rule of X" which multiplies growth by 2-3x before adding margin. Under Rule of X (with 2x growth weight), a company growing 30% with 10% margins scores 70 (30×2 + 10), while a company growing 10% with 30% margins scores 50 (10×2 + 30). This better reflects that growth at scale is worth more than margin at scale. The practical implication: if your Rule of 40 score is 35-45 and growth is above 25%, you are in a better position than a company scoring 45 with only 10% growth. Maintain growth and let margins improve naturally as you scale, rather than cutting growth to boost margins.
Ehsan Jahandarpour
AI Growth Strategist & Fractional CMO
Forbes Top 20 Growth Hacker · TEDx Speaker · 716 Academic Citations · Ex-Microsoft · CMO at FirstWave (ASX:FCT) · Forbes Communications Council