If you are married or have dependants, you will receive BAH for the full 45 days based on your zip code. I went to OBC in June of 2005. I am on HPSP, married, and had two children at the time. I recieve $750.00 per month, so in total for OBC, I received $1,025.00 for OBC. This was my experience. If you are single with no dependants, then you will recieve no BAH.