Why contribution margin matters more than gross profit
Contribution margin isolates the variable cost of one more sale. It tells you whether more volume helps. If contribution is $5/unit and fixed costs are $10K, the next 2,000 units fund fixed costs and every unit after is pure profit. Linear scaling — until you hit a step-fixed cost (new warehouse, second salesperson).
Step-fixed costs break the model
Most businesses hit cliffs: at 50 customers you need a 2nd CSM, at $100K MRR a real CFO, at $1M ARR a sales VP. Each step jumps fixed costs and resets break-even. Build a tiered break-even by capacity range, not a single number.
Price changes have outsized leverage
A 10% price hike (volume held constant) often doubles profit because nothing else changes. A 10% volume increase only adds 10% of contribution. Always model price experiments before discount campaigns.
FAQ
Are taxes included?
No — break-even is pre-tax operating profit. After-tax break-even requires more revenue (~25–30% more) to net the same dollar.
How do I handle multiple products?
Use weighted-average contribution margin across the product mix. If 40% of units are Product A ($30 margin) and 60% Product B ($15 margin), weighted = $21/unit.
What about online businesses?
Treat ad spend as variable cost (if cut, sales drop) OR semi-fixed (committed budgets). Most DTC brands run break-even with ads-as-variable, then sensitivity-analyze ROAS.
How this calculator is built
Independently maintained
Written by Sam Doshi and the RevenueLab editorial team. We don't sell the data feeds this tool is built on.
Sourced from primary data
Benchmarks come from public AdSense / Stripe / IRS disclosures and reader-submitted data — never third-party "$X per view" claims. Full methodology.
Last reviewed
June 2026. We re-check every figure on the platform on a rolling quarterly cycle.
Editorial standards
See our editorial policy and disclaimer. Results are estimates, not advice.