You can upgrade your account at any time. It is free to upgrade, and the only charge you would be responsible for is the price difference between your current plan and the plan to which you'd like to upgrade.
For example, if you already paid $9.95 this month for your current plan at HostGator, and the new plan is $14.95 per month, you would only pay the $5.00 difference. If you upgrade halfway through the month, we will charge a pro-rated amount, and the normal monthly fee will be charged next month.
For full details, please read our article:
Similarly, you can downgrade your account at any time. There is no contract to keep you in your plan, however, you will be required to move your own data during the downgrade process.
For more details, please read our article: