Microsoft Invest - Payment
Microsoft Advertising invoices are sent within 5 business days of the end of the previous month of service; for example, for March purchase of media the invoice date would be no later than April 7 (at the latest).
Payment terms are typically net 30 from the date of invoice. Refer to your contract for further information on your payment terms.
For general information on your invoice, see Understanding your Invoice.
Refer to the specific payment instructions on your invoice for the most up-to-date information
You can get billing reports broken out by time period, inventory source, advertisers and publishers (for networks) and many other metrics. Billing reports are available through the UI and the API.