Here’s my timeline for a recent periodic update for TS/SCI with a contractor for an IC agency:
Sometime Fall 2013: Submitted eQIP
Sometime late 2013: Met with investigator (OPM FIS guy, not a contractor)
Investigation Complete: January 2014
tick… tick… tick…
Final clearance (update) granted: APRIL 2017
Now there’s a bit more to the story but I heard NOTHING from Jan 14 til about Sep 16 (had to provide some more info) and then crickets again til beginning of Mar 17, then finally granted. The stuff they asked about in Sep 16 and Mar 17, they knew about from the investigation! Took them 3 years just to ask me a question!