If the migration tool didn't move all of the projects in your account, you can manually link them to the new billing account. To move an existing project to a new billing account, you must be an owner on the project and a billing Admin or Project Manager on the destination billing account.
To change the billing account:
- Go to the Cloud Platform Console.
- Open the console left side menu and select Billing.
- If you have more than one billing account, you'll be prompted to select the linked billing account to manage the current project's billing.
- Under Projects linked to this billing account, locate the name of the project that you want to change billing for, and then click the menu next to it.
- Select Change billing account, then choose the desired destination billing account.
- Click Set account.
Charges already incurred that have not yet been reported in the transaction history will be billed to the former billing account. This can include charges from up to 2 days prior to when the project was moved.