Three ways your break-even floor is quietly wrong

The symptom

A funnel looks profitable on paper, with order value apparently clearing the bar, and still loses money, or a funnel that was profitable starts losing money with nobody noticing for weeks.

The three ways this breaks

• Comparing order value against your headline price instead of your acquisition cost. It's a far easier bar to clear, and clearing it tells you nothing about whether traffic actually pays for itself.
• Treating a floor computed once as the permanent answer. A floor ages the same way any other assumption does, silently, until the gap between it and reality is the size of months of drift.
• Computing the floor from a handful of sales. Acquisition cost typically takes roughly fifty purchases to settle down; a floor built on ten sales is a guess wearing a decimal point.

A fourth trap worth naming

Pricing psychology claims, like charm pricing (prices ending in 7 or 9) or anchoring effects, circulate widely with no reachable primary study behind most of the quoted figures. The safe statement is narrower than the popular one: charm pricing has a small effect in side-by-side comparisons and close to none on an isolated page. Treat both ideas as held lightly, not as a substitute for actually moving a price and reading the settled result.

The fix

Always compare order value to acquisition cost, never to headline price. Recompute the floor whenever order value moves, rather than on a fixed schedule or never. Wait for roughly fifty settled purchases before trusting a floor figure, and mark anything built on fewer as provisional. Don't substitute a popular pricing-psychology claim for actually testing a price change and reading settled cash.

How to spot it

Check what your current break-even floor was last compared against: acquisition cost, or just the sticker price. Check when it was last recalculated, and how many settled sales it was built from. If any of those three answers looks weak, the floor itself is the thing to fix before touching traffic or creative.