If your plan expires in 30 days or less or if you have used 90% of your available projects, the “Renew” button will appear at the top of the page when you log into your account. If you have used all your projects and want to renew bulk projects, you can add projects to your cart and buy them.
If you checked the auto-renewal box, your plan will renew on its expiration date or when you run out of projects.
For the Enterprise plan, please refer to the question “How do I buy additional bulk projects with an Enterprise plan?”.