How soon can a SM request BAH if their significant other is pregnant?

He wil have to wait until after delivery. He will need to be the father on the birth certificate. Moving out of the barracks depends on a couple of factors.

He needs to see the S1 ask the right questions, check with housing and the rest will unfold.

You can’t request BAH for a girlfriend.

Based on the scenario described, the member is currently authorized BAH-Partial due to his current assignment to single-type government quarters, i.e., the barracks. He will not be able to receive BAH at the with dependents rate until he acquires a dependent that qualifies for this BAH type. For instance, through marriage or primary physical custody of the child once he or she is born. He may be authorized BAH-Differential in the event that he pays child support in the future that meets or exceeds the BAH-Differential rate based on his rank; the intent of this BAH is to offset child support costs and should not be confused with other BAH types. He does not meet any requirements in the DoD FMR to rate BAH without dependents at this time. However, the reference delegates aspects of BAH without dependents determinations to the Services, which means that you should consult with your S-1/Administrative Section to be advised on the BAH without dependent process that's applicable to your Service and installation.

In my experience, this would be a case that will not warrant BAH without dependents because the member lacks proper justification to rate this entitlement based on his current situation.

Reference: DoD FMR Vol 7A, Chapter 26

Semper Fi

SGT (Join to see) Simple! Get married by a legitimate person who is licensed to perform marriages!

The soldier's best choice is to do the right thing and marry his baby's mother. Once married, I assume the soldier's spouse will be entered into DEERS and he will be allowed to move out of the barracks and collect the with-dependents BAH rate. Not exactly the best way to start a marriage, but it has a chance to work. IMO best option financially for all involved.