How to Create a CM1 POAS Custom Column in Google Ads

This guide explains how to create a CM1 POAS (Profit on Ad Spend) custom column in Google Ads. The column calculates the attributed Contribution Margin 1 (CM1) generated per advertising dollar spent by dividing the CM1 AllCustomerPurchase Value by Cost. This allows campaign performance to be evaluated based on contribution margin rather than revenue.

Maria Dik
15 steps
3 minutes

Google Ads

Navigate to [https://ads.google.com](https://ads.google.com/aw/conversions?ocid=833620922&ascid=833620922&euid=929714583&__u=9921495967&uscid=6478487745&__c=3688320505&authuser=0) and go to "Campaigns" → "Campaigns"→ "Campaigns".

Click "Columns" above the campaign table and select the "Edit custom columns icon".

Open the "Custom columns" section.

Click "+ Custom column".

In the Owner dropdown, select the Google Ads account where the column should be created.

Enter CM1 POAS as the column name.

Enter Mable CM1 Profit on Adspend in the Description field.

Set the Data format to Number (123).

Click "+Column" to add a metric.

Select "Conversions" and then "All conversion value".

Click outside the metric selector so the filter options appear on the right side.\ Under Filter “All conversions value” by, select Conversion action.

Search for CM1 AllCustomerPurchase and select it.

Click the ÷ (divide) operator.

Click into the formula field, type Cost and select the Cost metric.

Click "Save" to create the custom column.