Each Site can have a different Billing Period active as the Storefront default. Before you can change a Sites default Storefront Billing Period. You must ensure you activate the Billing Period and set prices.
Changing a Storefront Billing Period
Visit your Pricing page and press the Edit Site to the right of your Site name.
Here you can easily select the Storefront Billing Period you wish to use from the activated options. That's all there is to it!
Here you can also specify how you'd like prices to be initially displayed to your customers on the Storefront. Learn how Storefront price display works.