Cancel Trello Business Class
You can downgrade your Trello Business Class Workspace from within your Trello account. This will stop you from being billed again in the future and will remove the option to use Business Class features in your account. Cards and boards which made use of those features (like custom backgrounds or attachments larger than 10 MB) won’t lose them, but you won’t be able to upload new backgrounds or add new large attachments.
What happens to our Workspace after we downgrade?
When a Workspace downgrades from Business Class, it retains its Business Class features and unlimited boards until the end of its prepaid service period. At the end of its prepaid service period, it becomes a free Trello Workspace that can hold 10 boards.
At the time of downgrade, you'll see a list of the 10 most active Workspace boards that will remain open, and any other boards will be closed but not deleted. Extra boards can be closed prior to downgrading or moved to a different Workspace.
Free Workspaces can enable one Power-Up per board, and once the Workspace has downgraded to free status, there is a short grace period that allows the Workspace to choose which Power-Up they would like to keep on each board. If the Workspace has more than one Power-Up on a board after the grace period then all Power-Ups on the board will be disabled.
Power-Up data is not deleted when the Power-Up is disabled, and that data will be restored once a Power-Up is re-enabled on a board.
Downgrade from Trello Business Class
To downgrade from Trello Business Class, you’ll need to be a Workspace administrator. Either navigate to your Workspace's billing page (https://trello.com/your-Workspace-name/billing) directly or navigate to your own profile and click on your Workspace's name and the Billing tab.
On the Billing tab, scroll to the bottom of the page. Click the “Cancel Business Class” link to downgrade from Business Class and prevent your card from being billed in the future.