Subscription Initial Purchase Cost: Ad Spend per New Subscriber

Subscription Initial Purchase Cost measures your advertising spend per new subscription acquisition.

Formula

Subscription Initial Purchase Cost = Ad Spend ÷ Subscription Initial Purchases

Formula Components

Metric	Definition
Ad Spend	Total advertising cost from connected ad platforms
Subscription Initial Purchases	Count of first-time subscription orders

Metadata
Type	Currency
Data Source	Upstack Pixel
Aggregation	Ratio

Example

You spent $12,000 on advertising in January and acquired 169 new subscribers.

Metric	Value	Notes
Ad Spend	$12,000	Monthly advertising cost
Subscription Initial Purchases	169	New subscribers
Subscription Initial Purchase Cost	$71.01	Subscriber CAC

How It Works

This metric divides your total ad spend by the number of first-time subscription orders. It represents your true subscriber acquisition cost, excluding recurring orders that aren’t new customers.

When to Use

Scenario	Action
Subscriber CAC	Track true new subscriber acquisition cost
LTV/CAC analysis	Compare acquisition cost to subscriber lifetime value
Channel optimization	Identify efficient subscriber acquisition sources
Budget planning	Forecast spend for subscriber growth targets

Metric	Relationship
Subscription Initial Purchases	The denominator in this calculation
Subscription Initial Purchase Value	Revenue from new subscribers
Purchase Cost	Overall purchase cost

See all Conversions metrics →