CM4 ROAS: Operating Profit Return on Ad Spend

Track CM4 ROAS for your Shopify store. Measure operating profit return per dollar of ad spend.

CM4 ROAS measures how much operating profit you earn for every dollar spent on advertising—the ultimate ad efficiency metric.

Formula

CM4 ROAS = CM4 ÷ Ad Spend

Formula Components

Metric	Definition
CM4 (Operating Profit)	Profit after all costs including OPEX
Ad Spend	Total advertising spend across platforms

Metadata
Type	Multiplier
Data Source	Shopify, Meta Ads, Google Ads
Aggregation	Ratio

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Example

Your Shopify store has $20,000 CM4 and spent $25,000 on advertising.

Component	Value	Calculation
CM4	$20,000	Operating profit
Ad Spend	$25,000	Advertising cost
CM4 ROAS	0.8x	$20,000 ÷ $25,000

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How It Works

CM4 ROAS shows true operating profit per ad dollar after all costs. A 0.8x CM4 ROAS means each ad dollar generates only $0.80 in operating profit. CM4 ROAS below 1x indicates ads don’t fully cover their allocation of fixed costs.

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When to Use

Scenario	Action
Measuring true ad profitability	CM4 ROAS is the ultimate efficiency metric
Investment decisions	CM4 ROAS > 1x means ads generate net profit
Budget planning	Use CM4 ROAS to determine sustainable spend levels
Performance benchmarking	Track CM4 ROAS trends over time

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Related Metrics

Metric	Relationship
CM3 ROAS	Contribution margin per ad dollar
CM4	Total operating profit
ROAS	Revenue per ad dollar

See all Performance metrics →