Proposed Bah Increase 2025. Basic allowance for housing (bah) another important update for 2025 is the basic allowance for housing, or bah, which will increase by 5.4% for the second year in a row. The bah rates for 2025 see an average increase of 5.4 percent.
2025 bah rates increased 5.4% starting jan. Rate changes take effect on jan.