10th and 25th of the Month
Orders placed between the 1st and 15th of the month are paid on or about the 25th of that month. Orders placed between the 16th and end of the month are paid on or about the 10th of the following calendar month. When a payment date falls on a weekend or holiday, payments will be sent on the following business day.
You can see all the details of your billing and payments using links in your bookseller menu. Click on Account at the top of the page, then look under Payments for the links Itemized order history and Transaction history. Your Transaction history a simple list of all credits, debits, and payments on your account. Your Itemized order history will show you a list of the book prices, totals, shipping, commissions, and fees for each order. You will see complete details after orders have been "billed", that is, credited to your account and debited for any applicable commission or payment processing fees. That list can be sorted by a date range.
You will also find billing information in the individual order details. You'll now see Transaction details which show the commission, fees, net due you for that specific order, and the scheduled payment date. Those are below the title and author details on the left side of the order details page.