No, as your current plan has not expired, the unused days will be deducted as part of the upgrade amount, so you don't need to pay the full price to upgrade to a new plan.

The specific price difference depends on the number of unused days of your current plan, and the system will automatically calculate it.​ The new plan counts from the date you upgrade again, instead of the starting date of your original plan.

The pricing/checkout page shows you the full price but will only charge you for the difference once you paid, please rest assured.

The difference will be credited to your account and deducted from the next invoice(s). If you upgrade your plan, you'll see the credit on the billing page at https://www.flexclip.com/profile.html.