🔥 Tier 1 - Must KnowID: grossMargin
Gross Margin
Revenue minus cost of goods - the real profit layer
In Simple Words (Zero Jargon):
Revenue minus cost of goods - the real profit layer
Official Mathematical Equation
(Revenue − Cost of Goods Sold) ÷ Revenue × 100
Why It Is Critical
Gross margin is not traditionally classified as a marketing metric - which is exactly why many performance marketers ignore it and get into trouble. Every profitability metric in this handbook (LTV, ROAS, ROI, LTV:CAC) requires gross margin to produce honest numbers. Without knowing gross margin, you cannot calculate breakeven ROAS, set a maximum CAC, or determine whether your LTV justifies your acquisition spend.
Strategic Rules of Thumb & Execution Playbook
- Know the gross margin of the product you are advertising before setting any campaign targets.
- Use gross margin to calculate breakeven ROAS: Breakeven ROAS = 1 ÷ Gross Margin %.
- Use gross margin to convert revenue LTV to margin-adjusted LTV.
- If gross margin changes (new supplier, revised pricing), immediately recalculate all your performance targets.
What You Get: The financial layer that makes all other performance metrics honest. Without it, you are optimising for revenue - not profit.