It really depends on when your billing period end date is. The bill is usually due about 15 days after the end of your billing period. The first month can be prorated at any number of days, so no one here can tell you when your bill will be due.
This is a user to user forum. I am a user, just like almost everyone else on the site.
*The views and opinions expressed on this forum are purely my own. Any product claim, statistic, quote, or other representation about a product or service should be verified with the manufacturer, provider, or party.