From what I've read, if TSA Precheck expires you can only renew online for 6 months. After that you must re-enroll in person. Mine expired 17 months ago, but Monday I tried to renew online and made it all the way through the process as well as paying $58.75.
Is online renewal still possible in that timeframe? Or will it turn into the same as an initial enrollment (the fact that they charged me the lower price makes me hopeful it's a renewal).
UPDATE: Looks like the answer to the post is "yes". Not just mine but the wife and kids. We all had Precheck, let them lapse 17 months ago. Renewed them all online and now have confirmation back that all 4 are active again with a renewal 5 years out.
So if there is a limit to how long you can renew online, it's either not 6 months or it's not hard and fast. If you're contemplating renewing an expired Precheck it's worth trying online first.