You can convert monthly subscriptions to a pre-paid subscription by following this guide. You will need to adjust the charge as well as the shipping frequency, then add in the $0.00 orders.
Before you begin
This article is not to be used if someone needs to be added to ReCharge partway through their prepaid cycle.
If this is the case, you should contact the ReCharge support team to make the necessary adjustments.
Step 1 - Search and select the customer
In the ReCharge Dashboard under Customers, search and select your customer, then click See Details found beside the Address ID.
Step 2 - Edit recurring properties
Click Edit Recurring Properties to change the interval.
Step 3 - Configure prepaid frequency
Click Pre-Paid Frequency Settings and configure your shipping and charge intervals. Once set, click Save.
Note: The charging interval needs to be larger than the shipping interval.
Step 4 - Add shipment
On the Purchase page for this customer, click the latest charge and then Add Shipment to add the remaining $0.00 orders scheduled for the current cycle.
Step 5 - Adjust the charge date
Adjust the charge date of future orders if needed by selecting the order and clicking Change Date.
Here is an example of a 6-month pre-paid subscription: