Cost per Acquisition is a Fundamental KPI
Cost per acquisition is an essential KPI to track to understand how your marketing budget is performing, where your profitability is likely going to be, and how quickly you can scale up your brand. If your CPAs are dropping, and you can afford to spend more money, that's a great opportunity to go in and grow your brand faster.
How to Calculate Cost Per Acquisition
Cost per acquisition is calculated by dividing total/variable marketing spend (over a certain time period) by the number of new customers who have placed an order at your store (in the same time period). Here's a visual:
Why Cost Per Acquisition is important
Cost Per Acquisition allows an eCommerce brand to get really granular on how expensive it is to actually acquire a new customer: from your dedicated marketing budget, how much can you afford to continue to drive growth from your brand?
As you continue to grow your business, and as customers get more expensive to acquire, you should expect your Cost Per Acquisitions to rise.
Track Cost Per Acquisition over time
Make sure that you check your cost per acquisition at the same time every week. There are many factors that will affect your brand's cost per acquisition that are vital to understand, and by maintaining a consistent cadence on metric tracking, you'll start to notice patterns around when metrics may change and the factors that may cause those changes.
For even more information about cost per acquisition (and related metrics), head over here.