Domain names are registered on an annual basis, and must be renewed when they expire.
How to Renew a Domain
To renew a domain name, you will need to contact the company you registered your domain with. If you registered your domain name with HostGator, the following article provides instructions.
Domain Expiration & Redemption
It is important to keep track of when your domain expires, since people can't find your website without it. Not renewing your domain name in time can cause your website to be down, costing you money, and it is even possible to lose your domain name if you wait too long.
We recommend that you add a reminder if your calendar as an additional reminder for renewing your domain name, just to be safe.