Copying a Budget
You can copy an existing budget to a new one. This allows you to retain the filters and notification settings from your original budget while still allowing you to make changes. Billing and Cost Management automatically populates the fields on the creation page for the new budget, where you can update the budget parameters.
Budgets created before October 20, 2016 can't be copied.
To copy a budget
Budgets use the same filters as Cost Explorer. For more information about the filters, see Filtering the Data You Want to View.
Sign in to the AWS Management Console and open the Billing and Cost Management console at https://console.aws.amazon.com/billing/home#/.
On the navigation pane, choose Budgets.
From the list of budgets, select the budget that you want to copy.
At the top of the page, choose Copy.
Change the parameters that you want to update. You must change the budget name.