Middle Red Flags: When to Pass on a SaaS Investment

The most important skill in bifurcation-aware investing is recognizing middle-market companies and passing on them — regardless of growth rates, team quality, or market size. The structural math doesn’t work.

Automatic Disqualifiers

Related: Understand the probability math in The Middle Math.

Any of the following characteristics should trigger a pass:

• ACV $20-100K with a sales team — This is the classic middle trap. The ACV is too low to justify enterprise sales costs, but the company has already built the sales motion. The math is structurally broken.
• NRR 90-105% — This range indicates no expansion engine. Customers aren’t churning dramatically (Floor), but they’re not expanding either (Ceiling). The company is in purgatory.
• “We’ll go enterprise later” — This is middle-market cope. If the company doesn’t have enterprise characteristics now (integration depth, services, multi-year contracts), it won’t magically develop them.
• Features cited as primary moat — If the pitch deck’s competitive advantage section focuses on features, the company has no moat. Features can be replicated in days with AI.
• Switching cost < 6 months ACV — If customers can leave easily, they will — especially as Floor alternatives proliferate.
• Monthly churn > 2% — At 2%+ monthly churn, the company loses 22%+ of customers annually. This is a leaky bucket that no growth rate can fill profitably.
• CAC payback > 24 months — Long payback periods indicate broken unit economics. In a capital-constrained environment, this is fatal.
• LTV:CAC < 3x — Below 3x, there isn’t enough margin to fund growth and operations. The business is structurally unprofitable.

This is part of a comprehensive analysis. Read the full analysis on The Business Engineer.