A plan breaks even when monthly margin on attributed additional revenue equals the plan price. In revenue terms: break-even revenue = plan price ÷ your gross margin (as a decimal). Using the same hypothetical 60% margin from the example — substitute your own:
Free — $0/mo: breaks even by definition; additional revenue capped at $100
Starter — $14.99/mo: $14.99 ÷ 0.60 ≈ $24.98 additional revenue
Growth — $29/mo: $29 ÷ 0.60 ≈ $48.33 additional revenue
Scale — $79/mo: $79 ÷ 0.60 ≈ $131.67 additional revenue
These thresholds ignore overage credits; add any credit spend to the plan price before dividing. Whether your store clears them cannot be known from this page — it depends entirely on your own revenue figure.