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The Profit Drag Blog

What your P&L isn't telling you — and what to do about it.

Latest

The Rule of 40 Was a Zero-Rate Artifact. Here's What Replaced It.

The Rule of 40 was calibrated for an era of near-free capital. As the cost of capital rose, the bar moved and the weighting shifted toward efficiency. Here's the adjusted target for B2B SaaS under $15M ARR.

By Vince Fulco·June 4, 2026·8 min read
SaaS metricsRule of 40capital efficiencyB2B growth

The Outcomes Manifesto: Why B2B SaaS Tools Must Stop Showing and Start Doing

Dashboards tell you what's wrong. The next generation of tools fixes it. Here's why the shift from copilot to autopilot isn't optional — and where Margin Levers stands on that arc today.

By Vince Fulco·Apr 9, 2026·9 min read
build in publicproduct strategyAI tools

What Would 100x Your SaaS? How to Use Claude for First-Principles Feature Brainstorming

A two-question AI brainstorming framework inspired by Eric Jorgenson's Book of Elon — for B2B SaaS developers who want to break out of roadmap incrementalism and find genuinely high-leverage ideas.

By Vince Fulco·Apr 7, 2026·7 min read
AI toolsproduct developmentB2B SaaS

Every Moat in B2B SaaS Is Shrinking. Here's What I'm Doing About It.

AI can replicate in a weekend what took a team 6 months. A 7-vector defensibility framework for founders who want to know where they're actually exposed.

By Vince Fulco·Apr 4, 2026·5 min read
competitive strategymoatsbuild in public

Customer Profitability Research: Key Findings from Academic Studies (2019-2024)

Academic research synthesis on customer profitability. Studies from DePaul, HBS, and global firms reveal why 30-50% of B2B customers destroy company profits.

By Margin Levers Team·Mar 5, 2026·12 min read
customer profitabilityresearchABC analysis

SaaS Profitability Metrics: Customer Benchmarks from 12 Industry Studies

SaaS profitability benchmarks from published research. Compare your customer concentration, GPM distribution, and segment health against industry standards.

By Margin Levers Team·Feb 25, 2026·11 min read
benchmarkscustomer profitabilitySaaS metrics

Introducing Margin Levers: See Which Customers Make You Money — and Which Don't

Margin Levers brings profit curve analysis to every B2B company. Import a CSV file, get AI-powered profitability insights in under 5 minutes, and discover the hidden pattern in your customer data.

By Margin Levers Team·Jan 7, 2026·4 min read
productannouncementcustomer profitability

How to Run a Customer Profitability Analysis in Under 5 Minutes

A step-by-step guide to running your first profit curve analysis with Margin Levers. Prepare your data, import a CSV file, and get actionable profitability insights in under 5 minutes.

By Margin Levers Team·Dec 10, 2025·6 min read
guidequick startcustomer profitability

Head vs. Tail: Why Your Best Customers Subsidize Your Worst

In every B2B company, a small group of highly profitable 'Head' customers subsidizes a large group of unprofitable 'Tail' customers. Understanding this dynamic is the key to unlocking hidden profit.

By Margin Levers Team·Nov 26, 2025·6 min read
strategyhead vs tailcustomer profitability

What Is Profit Curve Analysis? The Hidden Pattern in Your Customer Data

Profit curve analysis reveals that a small group of customers generates most of your profit while others destroy it. Learn how this technique works and why every B2B company should use it.

By Margin Levers Team·Nov 12, 2025·6 min read
profit curvemethodologycustomer profitability