Are you talking about the CIU you mentioned in this post from Feb 27 (I searched with your Disboards name in this thread) -
If that's the one, then 90 days would be May 28th (using a calendar calculator; I did not add it up by hand!). I'm not sure exactly what you mean by "cutting it kind of close" - do you mean by organic spend? If yes, then prepaying utilities or getting fee free prepaid cards (ODOM is running the $15 off $300 VGC promo right now; last time I got 3 $200 cards and got $30 off and I've seen a couple dps that is working this time around too although YMMV) will help, and I would make sure to meet that spend at least 2 days before the deadline in order for it to post in time. If cash flow is the issue, I look at the statement close date, and put spend on the card after the close date (but before the MSR deadline) in order to get the extra float time to pay off the bill. I don't know if Chase still allows 115 days from card opening to meet spend like they used to, I thought there were mixed dps on that. You can SM Chase to find out the exact date if you're worried about it.