BAH Explained: How Military Basic Allowance for Housing Is Calculated

Basic Allowance for Housing (BAH) is one of the most significant parts of your military compensation — for many service members, it represents $1,500 to $3,000 or more per month in tax-free income. Yet most service members have never read the actual rules governing it.

Here's how BAH actually works.

What BAH Is (and Isn't)

BAH is a monthly allowance designed to help service members cover the cost of civilian housing when government quarters are not provided. It is:

• Tax-free — BAH is not subject to federal or state income taxes
• Not based on your actual rent — you keep the difference if you spend less
• Based on where you're stationed, not where you live
• Set annually by DoD based on local rental market surveys

BAH is not a reimbursement. If you rent a place that costs $200 less per month than your BAH rate, you keep that $200. If it costs more, you pay the difference out of pocket.

How BAH Rates Are Set

Each year, the Defense Travel Management Office (DTMO) surveys rental housing costs in every military duty location in the United States. They look at median rental prices for:

• 1-bedroom apartments (for E-1 to E-3 without dependents)
• 2-bedroom apartments (for most junior enlisted with dependents)
• 3-bedroom townhomes or houses (for senior enlisted and officers with dependents)

The survey targets the median cost in the local rental market, meaning BAH is designed to cover 100% of median housing costs for your pay grade and dependency status. BAH rates are published by DTMO at militarybenefits.defense.gov.

The Three Variables That Determine Your BAH

1. Duty Location Your BAH rate is tied to your permanent duty station ZIP code, not your home address. San Diego rates are higher than Fort Leonard Wood rates because the local rental market is more expensive.

2. Pay Grade BAH scales with rank. An O-5 receives significantly more BAH than an E-4 in the same duty location, reflecting the expectation that higher-ranking service members rent in higher-quality housing.

3. Dependency Status Service members with dependents (spouse, children, or other qualifying family members) receive a higher BAH rate than those without. This is a simple split — either you have dependents or you don't — regardless of how many dependents you have.

BAH Rate Protection

If your BAH rate decreases due to a rate change in a survey year (which can happen in locations where rents dropped), you are rate-protected. You continue receiving your previous rate until:

• You PCS to a new duty station
• Your dependency status changes
• Rates in your area increase above your protected rate

Rate protection is set in law under 37 U.S.C. § 403.

BAH II and Partial BAH

BAH II (also called BAH Reserve Component/Transit) applies in specific circumstances where full BAH is not authorized — for example, when you're traveling under orders but not at a permanent duty station. The rate is fixed at a lower national level and does not vary by location.

Partial BAH applies to service members in government quarters who are paying for housing elsewhere (for example, maintaining a residence for dependents near a previous duty station). It is a smaller allowance that partially offsets that dual cost.

OHA: The Overseas Version

If you're assigned OCONUS (outside the continental United States), you receive Overseas Housing Allowance (OHA) instead of BAH. OHA operates differently — it is a reimbursement system based on your actual lease amount (up to a cap), plus a utilities allowance and a move-in allowance. Unlike BAH, you don't keep the difference between your lease and the cap.

What Happens to BAH When You Separate?

BAH stops on your separation date. It does not carry over, and there is no transitional BAH benefit for separated service members (though there is a two-month period following divorce or loss of dependent status).

If you're planning your separation budget, MTT's Budget Planner can help you model the gap between your final military pay (including BAH) and your first civilian paycheck.

Planning Around BAH

A few things worth knowing for PCS season:

• You receive BAH for your gaining duty station rate starting on the date your orders are effective, not the date you arrive
• During a PCS move, you may temporarily receive both your old and new BAH rate (MIHA — Move-In Housing Allowance)
• If you live in government quarters, your BAH goes to the housing office — you receive zero

For information on how BAH changes during a PCS move specifically, see our guide on How BAH Changes When You PCS.

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Sources: Defense Travel Management Office (militarybenefits.defense.gov/housing/bah), 37 U.S.C. § 403, DoDI 1340.23