Changing the price of a product
To alter the price of your product, open the product from your Products dashboard change the price and click "Save changes".
You cannot change the currency of a product after you have created it.
Subscriptions & Memberships
If you change the price of an active subscription product, any customers who subscribed before the price change will continue to pay the original purchase price. You cannot change the time frame in which your subscription bills (for example, change it from annually to every six months). In order to do this, you will have to create a new subscription.
If you change the price of a Pre-Order before its release date, any customers who purchased it before the price change will pay the original price on the day of its release.
For example, let's say you created a $15 Pre-Order product on May 1, and set it to release on May 30. If you raised the price to $20 on May 25, anyone who clicked "buy" prior to that will still only pay $15 on May 30.