I saw a brand celebrate a 4.0 ROAS last week. They thought they were printing money.
After we ran the numbers, they were actually losing $2 per order.

The ROAS Trap

Return on Ad Spend is a proxy metric. It tells you revenue, not profit. It ignores COGS, shipping, agency fees, and payment processing.

The Metric That Matters: POAS (Profit on Ad Spend)

You need to shift your optimization goal from Revenue to Contribution Margin Dollars.

The Formula:

  • Revenue - (COGS + Shipping + Pick/Pack + Transaction Fees) = Gross Margin

  • Gross Margin - Ad Spend = Contribution Margin (Profit)

The "Break-Even ROAS" Calculation

You must know your Break-Even ROAS (BER) for every product.

  • If your margin is 50%, your BER is 2.0.

  • If your margin is 20%, your BER is 5.0.

The Strategic Pivot

  1. Stop bidding for low-margin products: High ROAS on a low-margin item is often less profitable than lower ROAS on a high-margin bundle.

  2. Feed Meta "Net Profit": Advanced media buyers are now using offline conversion events to pass profit data back to Facebook, not just revenue.

Optimize for what you keep, not what you make.

P.S. Revenue feeds the ego. Profit feeds the family.

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