You will automatically see a banner for the appropriate promotion, which will track your qualifying transfers and investments. It also displays the reward you'll be receiving. Typically, unless otherwise specified, IRA accounts are exempt from these promotions.
The most common promotion is the New User promotion. Though subject to change, this promotion typically is as follows:
You will have until the end of the month following sign-up to complete any transfers or investments.
For example, let's say you sign up on June 1. You will have until July 31 to make qualifying investments.
But if you sign up on June 30, you will also have until July 31 to make qualifying investments.
Rewards are credited roughly two months after the end of the promotional period.
For example, June sign ups will get their reward in September, two months after July 31.
To make the most of promotions, you may want to consider signing up on the first day of a month.