Your services will be automatically disabled. As soon as you add more, it'll come back, but that can take a few minutes and that often feels like the longest few minutes of your life, so we recommend using and customizing the account balance warning system (which supports both email and SMS) to keep track of things before they go that far.
If you don't add more funds right away, things will hang around for at least 30 days. You can add more funds at any point during that period and get it all back.
If you haven't added funds after the 30 days, we'll start cleaning things up. Services paid for by that account, including all hosted content, will be removed. If you don't have any registered domains on that account, the account will be removed a few days later.
If 30 days is not a long enough grace period, we offer a feature called "suspended animation" that can help you extend the retention of your content when your balance runs low. That setting can be enabled and managed from the "Suspended Animation Threshold " line of the Account Information box on the page for your account under the Accounts tab.
If you do have one or more registered domains, they will persist until they complete the expiration/deletion process or are transferred elsewhere. That will keep the relevant account and your membership open so that you can continue to manage them.
You can also view (and configure) how long your membership is retained after your last account expires in the "Retention Time" line of the "Details" box on the Profile tab. As long as your membership continues to exist, you can request that we attempt to recover deleted content. (A fee applies for this service.) Recoveries of this type are generally successful if requested within several months of deletion.
Once your membership is deleted, however, that's it.