No, if you are transferring a domain into noip.com, your existing time left on your domain registration is retained. Additionally, a year of registration is added to your domain upon completion of the domain transfer.
So if your domain expires on January 1, 2023, after the transfer is completed, your new expiration date would be January 1, 2024.
If you transfer your domain out of noip.com, you will still retain the years you’ve purchased here with us as well.