Cost per Signup Completed: Track Registration Acquisition Cost

Cost per Signup Completed measures the average advertising spend required to generate one successful registration.

Formula

Cost per Signup Completed = Channel Spend ÷ Signup Completed Events

Formula Components

Metric	Definition
Channel Spend	Total advertising spend across channels
Signup Completed	Total completed signup events

Metadata
Type	Currency
Data Source	Upstack Pixel
Aggregation	Ratio

Example

Your SaaS spent $15,000 on ads and generated 300 completed signups this month.

Channel	Spend	Signups Completed	Cost per Signup
Google Ads	$8,000	140	$57.14
LinkedIn	$5,000	100	$50.00
Facebook	$2,000	60	$33.33
Total	$15,000	300	$50.00

How It Works

This metric divides your total channel spend by the number of completed signups. It measures your customer acquisition cost at the registration stage, helping you understand how efficiently you’re converting ad spend into new registered users.

When to Use

Scenario	Action
CAC calculation	Measure cost per registered user
Channel optimization	Identify most efficient channels
Budget planning	Project costs for growth targets
ROI analysis	Calculate return on signup investment

Metric	Relationship
Signup Completed	Count of completions
Cost per Signup Started	Top-funnel cost
Signup Completed Value	Value of signups

See all Conversions metrics →