I opened my Platinum card about this time last year and the limit was 20k. I requested a CLI in November to go to $25k and they granted it. So maybe 3 months of use?
Just to add to my first response; my 2nd CLI came in early June. Went from $25k -> $27.5k.
Remember that with NFCU it's always a hard pull. I started at $11K and asked for an increase to $18K. It was granted immediately, but it ended up being a hard pull. I have not had an auto CLI from them. I use it every few months to keep it active and have a signature loan with them for my motorcycle. Don't need more and never carry a balance, so that may be why no love.
I got a MC in July of last year and couldn't wait any longer; asked for an increase around June or early July (before 12th statement had cut) and they approved me instantly.
I got a VISA in around September, less than one year ago, and logged on yesterday to see that they gave me an increase without my having to ask!
*no hard pull, even for the increase I requested.
I just went from $15K to $22K in July w/ no hp...