Blended Cost per Subscription: Ad Efficiency Metric

Track cost per subscription sign-up across Meta, Google, and TikTok ads. Measure blended acquisition efficiency for subscription-based products.

Blended Cost per Subscription measures how much you spend across all ad platforms to acquire one subscription sign-up.

Formula

Blended Cost per Subscription = Blended Spend ÷ Blended Subscriptions

Formula Components

Metric	Definition
Blended Spend	Total advertising spend aggregated across all connected ad platforms
Blended Subscriptions	Subscription sign-ups attributed to ads across Meta, Google, and TikTok

Metadata
Type	Currency
Data Source	Meta Ads, Google Ads, TikTok Ads
Aggregation	Ratio

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Example

A subscription brand spent $4,500 across all ad platforms and acquired 150 subscriptions:

Metric	Value
Total Spend	$4,500
Subscriptions	150
Cost per Subscription	$30.00

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How It Works

This metric divides your total advertising spend across Meta, Google, and TikTok by the number of subscription sign-ups attributed to those ads. Lower values indicate more efficient subscriber acquisition. Data syncs daily from each platform’s reporting API.

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When to Use

Scenario	Action
Setting acquisition targets	Establish benchmark cost per new subscription
Comparing platforms	Identify which platforms acquire subscribers cheapest
Budget allocation	Shift spend toward lower-cost subscription channels
Evaluating campaign efficiency	Compare cost per subscription across creative variants

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Related Metrics

Metric	Relationship
Blended Spend	Numerator — total advertising cost
Blended Subscriptions	Denominator — subscription sign-ups
Blended CPA	All-conversion cost efficiency metric

See all Blended Conversions metrics →