CM1 MER: Gross Margin Marketing Efficiency

CM1 MER measures gross margin as a percentage of ad spend—how much gross profit your advertising budget generates.

Formula

CM1 MER = ( CM1 ÷ Total Ad Spend ) × 100

Formula Components

Metric	Definition
CM1 (Gross Margin)	Profit after COGS
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 $75,000 CM1 and spent $25,000 on advertising.

Component	Value	Calculation
CM1	$75,000	Gross margin
Ad Spend	$25,000	Advertising cost
CM1 MER	300%	$75,000 ÷ $25,000 × 100

How It Works

CM1 MER shows gross margin relative to ad spend. A 300% CM1 MER means your ads generate 3x their cost in gross margin. Higher is better—it indicates more margin available to cover fulfillment, marketing, and fixed costs.

When to Use

Scenario	Action
Measuring gross margin efficiency	Track CM1 MER for product-level efficiency
Setting targets	CM1 MER should exceed 100% for positive gross margin
Comparing campaigns	Identify campaigns with highest CM1 MER
Product analysis	See which products drive best CM1 MER

Metric	Relationship
CM1 ROAS	CM1 per ad dollar (same concept, different format)
CM2 MER	Variable margin as % of ad spend
MER	Ad spend as % of revenue

See all Performance metrics →