How do I create a zero charge out labour rate

Labour Rates are defined as Billing Rates in Tradify and are set up under Settings > Pricing Levels & Billing Rates. 

Any number of Billing Rates can be created and these can be selected by the Staff Members at the point of adding a Time Entry on a Job.  Each Billing Rate can have it's own hourly charge out rate.

To create a Zero Charge out rate for a Billing Rate, simply add a Billing Rate by clicking on the "New Billing Rate" button at the bottom of the Pricing Levels & Billing Rates window.  Enter the relevant details as required for the Billing Rate and then place a tick in the Check Box entitled: "Let me enter the price later" as shown below.

This will allow the Billing Rate to be saved with Zero Hourly Rates.