CM2 MER: Variable Margin Marketing Efficiency

CM2 MER measures variable margin (after fulfillment) as a percentage of ad spend—how much margin your advertising budget generates.

Formula

CM2 MER = ( CM2 ÷ Total Ad Spend ) × 100

Formula Components

Metric	Definition
CM2 (After Fulfillment)	Profit after COGS, fulfillment, and transaction costs
Total Ad Spend	Combined advertising spend across platforms

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

Example

Your Shopify store has $62,500 CM2 and spent $25,000 on advertising.

Component	Value	Calculation
CM2	$62,500	Variable margin
Ad Spend	$25,000	Advertising cost
CM2 MER	250%	$62,500 ÷ $25,000 × 100

How It Works

CM2 MER shows variable margin relative to ad spend. A 250% CM2 MER means your ads generate 2.5x their cost in variable margin. This margin must cover marketing costs and fixed expenses for true profitability.

When to Use

Scenario	Action
Measuring variable margin efficiency	Track CM2 MER for cost-aware efficiency
Setting targets	CM2 MER should exceed 100% + your marketing cost rate
Comparing campaigns	Identify campaigns with highest CM2 MER
Budget planning	Use CM2 MER to determine sustainable spend

Metric	Relationship
CM2 ROAS	CM2 per ad dollar (same concept, different format)
CM1 MER	Gross margin as % of ad spend
CM3 MER	Contribution margin as % of ad spend

See all Performance metrics →