I registered for the $100 bonus using the link above because I was planning to deposit more money into my Fidelity account in the next few weeks, but they just gave me the $100 credit because I made a deposit last month, which was before I registered for the bonus. So it works for prior deposits, too, even if you register after the fact. It didn't even cross my mind that they would give me a bonus for the deposit I had already made, and I didn't even ask for it. I love Fidelity!
