Bah Calculator 2025. On december 13, the department of defense is approved 5.4% increase in the national average for the 2025 basic allowance for housing (bah). Service members can calculate their bah payment by using the basic allowance for housing calculator at:.

Select your service branch for a full list of special pay relevant to you. Military members can use our 2025 bah rates & charts below to determine their monthly housing allowance based on their military housing area (mha) and grade.