Once you do a purchase in Zoho CRM, irrespective of the number of active users that you have in your account, Zoho CRM will charge for your purchase until you explicitly tell the system to stop making recurring payments. So if you are using a paid account with Zoho CRM, in order to cancel the service, you need to instruct the system to stop making further payments from your credit card account:

1. Click Manage Subscriptions button in the users list page.
2. You will get a plan page, where click on the Manage your plan button.
3. In the resulting page, select the downgrade option check box and select the number of users to be removed ( for whom the billing should not occur the next time).
4. Click the Update Account Button.

PS: Once you do a downgrade, the licence will be cancelled immediately. So please downgrade to free version at your convenient date before the end of the expiry date.