Does Detachment Commander time count towards the 2 years of Company Command time?

Sad to say, no. Most branch managers and AR 600-3 will tell Company Commmad is not an assignment an LT needs until he/she is a Captain. I’ve had several friends who did the same, but when they were promoted to Captain, they still had to pursue a 18-24 month Company Command. Some believe it’s because when you become an O-3 you’ll be held more accountable, whereas when you command as an LT, you may be able to make more mistakes. Additionally, most LT (Active Duty) have not attended CCC. To be considered branch qualified as a Captain, you must have successfully commanded for 18 plus months and graduated CCC. Now I don’t say all this to discourage you from accepting a commmad. But be aware that this may be more of a “trail run” and that you’ll have to seek command when you make Captain. Good luck LT.

I did HHC Command as a LT for 16 months, I count it as command time. I also have a friend that has never had command time and still made CPT. I don't think there is a mandatory requirement for command in order to get promoted.

May have changed but I did 18 months as HHC CO as a 1LT and that counted towards my command time.

...from what I remember, all (consecutive?) time is counted as Command time; unless, regulations have changed. Good Luck & I sincerely hope You ate selected for CPT!

Judging by the other responses, the army has changed a lot since my career (1978-2002). We use to make captain in 3 to 3.5 years. We use to get one year commands so that they could run as many thru as possible. It use to not matter if you were a 1LT or a CPT, nor did it matter if you'd been to the captains' course or not. As a captain, in 1990, I had command of a aviation detachment (UH-1, assault) in Europe and it counted as a company command. It lasted 2 years only because I was deactivating the unit, a 2 year command was very unusual at that time. BTW, deactivation a unit is a real pain, every little screwdriver and tent peg has to be accounted for.

1LT Bob,
I would not worry about it counting as command time. You are a leader and were selected to lead Soldiers, Lead them. I believe that command is why we are officers take all the opportunities you have to grow, learn and lead. I had company commands as a 1LT and CPT, there is a difference in what is expected of you.