Upgrade/Downgrade services – cPanel

Login to cPanel.
Tutorial: login from the Client Area or the direct link.

Find the Billing & Support section and click the Upgrade/Downgrade link.

You will be redirected to Client Area.
Click the Services green button.

In the My Products & Services table, find your hosting service you want to upgrade or downgrade and click the Manage button.

In the Actions menu on the right of the screen, click on the Upgrade / Downgrade button as indicated below.

At the top of the screen, the current configuration is shown.
And underneath, you will see a list of all possible upgrade or downgrade options for your current plan.
By clicking on the drop-down menu next to each upgrade or downgrade option, you can select the billing period.
After selecting it, click on the blue Choose Product button to continue.

On the next screen, you will see the expense summary and can proceed with the payment if happy.

Insert Promotional Code (if you have one), choose the preferred Payment Method and click the button Click to Continue.

The next screen is your Proforma Invoice. You can Print, Download, Pay the Invoice or go Back to Client Area.
After You have paid the Invoice, you will finish your Upgrade/Downgrade process.