Subscription Churned Cost: Wasted CAC from Churn

Subscription Churned Cost measures the advertising spend associated with subscriptions that churned.

Formula

Subscription Churned Cost = Ad Spend ÷ Subscription Churned

Formula Components

Metric	Definition
Ad Spend	Total advertising cost from connected ad platforms
Subscription Churned	Count of churned subscriptions

Metadata
Type	Currency
Data Source	Upstack Pixel
Aggregation	Ratio

Example

You spent $10,000 on advertising in January and had 89 churned subscriptions.

Metric	Value	Notes
Ad Spend	$10,000	Monthly advertising cost
Subscription Churned	89	Lost subscriptions
Subscription Churned Cost	$112.36	Ad spend per churned sub

How It Works

This metric divides your total ad spend by the number of churned subscriptions. While not a direct causation metric, it helps contextualize acquisition cost against retention performance.

When to Use

Scenario	Action
Channel quality analysis	Identify sources with high churn attribution
CAC efficiency	Compare acquisition cost to retention outcomes
Win-back budgeting	Allocate spend to reduce churn impact
Cohort performance	Analyze churn rates by acquisition channel

Metric	Relationship
Subscription Churned	The denominator in this calculation
Subscription Churned Value	Revenue lost to churn
Subscription Created Cost	Cost to acquire new subs

See all Conversions metrics →