Google Ads for E-Commerce 2026: ROAS vs Profit — The Right Metric

Mar 18, 202610 min

ROAS vs Profit: Why You May Be Optimizing for the Wrong Metric

A 8x ROAS can hide a loss if your product margin is 10%. In 2026, top e-commerce advertisers drive Google Ads with real profit, not ROAS.

Product A: €100 price, 60% margin, 4x ROAS → €140 profit per €spent

Product B: €100 price, 15% margin, 8x ROAS → €20 profit per €spent

If you optimize globally on ROAS, the algorithm favors Product B. You spend more to earn less.

**Segment A (margin > 50%)** → target ROAS: 3x

**Segment B (margin 25-50%)** → target ROAS: 5x

**Segment C (margin < 25%)** → target ROAS: 10x+

Calculation: (Revenue × Margin%) / Ad Cost

Target PROAS: > 1 (every euro spent generates more than one euro of gross profit)

Accounts we've migrated to PROAS-driven management improved net profit by +43% on average without increasing their budget.

Our team offers a free audit of your campaigns.