Currently slotted as an E5, will I get promoted into my same slot?

I have heard otherwise from credible retention sources. In the USAR you would only promote into your current slot if you were magically slotted into it by an impartial board. The promotion process chooses where you end up when you are (P) and slot you. That may or may not be where you are now. Also, part of your promotion packet you should have chosen your commuting distance willing to accept a promotion. Those highly motivated draw a large circle from home of record, those wanting to stay close regardless of promotion draw a narrow circle.

Now, it's not uncommon that after the fact the promoted soldier is brought back into their original unit. It's a common consideration between USAR units. I was retained by my unit when was promoted to SGT and I have pulled strings in both directions as a company commander on the Jr NCO promotion slotting fall out.

I'm going to be bold enough to say the chances are low you are slotted into your current billet, but it probably isn't a big deal to get you transferred back.

I recommend you line up your ducks and get your current unit to start and fill out a DA4651 to keep you once you know who your new unit is going to be. So just fill out your current unit info (with S1 help) as the gaining unit with your company commander's signature and then all you'd need is your new units CO signature as the losing unit.

If you do NOTHING, you most certainly will drop off the UMR and sign-in roster, and your current unit will not be able to action anything on your behalf at all.

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DISCLOSURE!!!!!!!!!!!!!!

See folks............. this is why it's important to have a good working relationship with your Chain of Command and fellow soldiers.

If the poster is not the only soldier in the slot in the UMR it's going to take some administrative moving of bodies to open the vacancy (suspect it's not a big deal otherwise an MOSQ E5 would already be there).

For a CoC annoyed by a soldier (not saying it's the poster at all, just mentioning a hypothetical) this would be their OUT to get ride of them, and slow to move on transferring back to the current unit.

For a CoC with a strongly tied interest in keeping the soldier the AGR's would already be on the phone with the support of the 1SG to 1SG talks between units to try and make the transfer effective BEFORE the next BA so the soldier doesn't even have to fuss with an RST or attend a BA with the other unit at all.

I can tell you the commanders will probably be entirely cool with it, but they are not the ones pressing he keys on the keyboards to make it actually happen. Realistically they are only going to apply their CAC and S1's will execute it. The soldiers and staff motivated to keep or lose a soldier are going to be the ones that either benefit from or caused them problems.

It is not automatic by any stretch of the imagination. There are a lot of considerations: your MOS, other units with vacant slots for that grade/MOS within your commuting distance as established on your elections and preferences, etc.

I was sitting in an E6 position when I got promoted to E6 and they still promoted me into a different unit. Even if you get promoted out, your promotion order will state that you owe that new unit 12 months of service. You can request a transfer earlier, but it's up to that commander whether or not to let you keep your rank. So, worst case scenario (assuming you are wanting to stay in your current unit), do your 12 months and then request to transfer back.

Good luck.

Nothing is automatic, if you are actually slotted on the UMR the chances are good that you get promoted into that position.
I am assuming that you have completed BLC and have been boarded, if you have completed all requirements then the chances are good that you stay in your current unit. As you go to next rank, the chances of staying at current unit diminishes