3 guides in Illinois: 1 Air Force, 1 Army and 1 Navy installations. At E-5 with dependents, 2026 BAH runs from $1,542 a month at Scott Air Force Base to $2,427 at Naval Station Great Lakes, across 3 housing areas, set against HUD's fair market rent for a 3-bedroom home near each.
Rates last verified August 2026 against the published source tables.
3 guides · Military pay exempt from IL income tax · TRICARE West (TriWest) · E-5 with dependents: $1,542 to $2,427 BAH across 3 housing areas
| Installation | City | Branch | Allowance at E-5 with dependents | Against local rent |
|---|---|---|---|---|
| Naval Station Great Lakes | Great Lakes | Navy | $2,427 BAH | Falls $159 short of a 3-bedroom |
| Rock Island Arsenal | Rock Island | Army | $1,908 BAH | Covers a 3-bedroom with $512 to spare |
| Scott Air Force Base | O'Fallon | Air Force | $1,542 BAH | Falls $189 short of a 3-bedroom |
At E-5 with dependents, 2026 BAH goes furthest at Rock Island Arsenal, where it covers a 3-bedroom with $512 to spare, and least far at Scott Air Force Base, where it falls $189 short of a 3-bedroom. It covers HUD's 3-bedroom rent at 1 of the 3 installations.
| Installation | 2026 BAH | HUD 3-bedroom rent | After rent |
|---|---|---|---|
| Rock Island Arsenal | $1,908 | $1,396 | $512 left |
| Naval Station Great Lakes | $2,427 | $2,586 | $159 short |
| Scott Air Force Base | $1,542 | $1,731 | $189 short |
HUD's FY2027 fair market rent is the 40th-percentile gross rent for the area, utilities included, which is what BAH is meant to cover; it is a benchmark, not a listing. Source: HUD.
Illinois. Illinois fully exempts military pay and military retirement from the state income tax.
SCRA. Under the Servicemembers Civil Relief Act your military pay is taxed by the state you are domiciled in, not by the one your duty station sits in. Being assigned to an installation in Illinois does not by itself change which state may tax you, and it does not create a filing obligation where you are stationed.
TRICARE West. Care at all 3 installations in Illinois falls under the TRICARE West region, administered by TriWest Healthcare Alliance — enrollment and claims run through 888-TRIWEST (874-9378).
Maintained by PCS Calculator, an independent site run by an active-duty service member. BAH checked against DTMO's 2026 table on 19 August 2026; rents from HUD's FY2027 fair market rents, fetched 28 September 2026; state tax treatment of military pay checked 19 August 2026; TRICARE regions checked 27 August 2026. This page was last updated 4 November 2026. How every figure on this site is checked