Combat Pay & Hazardous Duty Calculator

26 U.S.C. § 112, implemented through IRS Publication 3 (Armed Forces' Tax Guide) and DoD Financial Management Regulation (DoDFMR) Volume 7A, Chapter 44.

For enlisted service members: ALL military pay earned in any month of service in a combat zone — base pay, special pays, bonuses, re-enlistment bonuses signed in the zone, accumulated leave sold from a CZTE month. For officers: capped at the senior enlisted basic pay rate plus HFP/IDP.

Any presence in a combat zone — even a one-day transit, layover, or QRF mission — converts the entire calendar month to tax-free status for CZTE purposes. The same rule extends SDP eligibility and HFP/IDP.

Current Executive Order designations include the Arabian Peninsula combat zone (Iraq, Syria, Jordan boundaries, Saudi Arabian airspace zones), Sinai Peninsula peacekeeping forces, and the Yugoslavia operations zone (legacy). The Afghanistan combat zone closed with the 2021 withdrawal; check the DFAS-published list for current designation before assuming.

Direct Support Areas — locations outside the combat zone proper but directly supporting combat operations — qualify for CZTE only if specifically designated as a "qualified hazardous duty area" under separate authority. Bahrain, Qatar, UAE, Oman, and certain seas have historically held this status under specific operational contexts.

Maximum monthly CZTE for officers in 2026: approximately $8,749 — equal to the highest enlisted basic pay rate ($8,524.50 for E-9 over 30 years) plus $225 HFP/IDP. Officer base pay above this remains federally taxable.

Federal exclusion is automatic. State conformity varies. Most states with income tax (including California, New York, Virginia) honor federal CZTE. A handful do not — verify against your State of Legal Residence. Service members with home of record in tax-free states (Florida, Texas, Tennessee, etc.) pay no state tax in any case.

37 U.S.C. § 310, DoDFMR Volume 7A Chapter 10. Rate: $225/month, tax-free, set by statute.

Member subjected to hostile fire or explosion of a hostile mine; on duty in an area in close proximity to a hostile fire incident in which the member was at risk; killed, injured, or wounded by hostile fire, mine, or other hostile action.

Member is on official duty in a foreign area designated by SECDEF as an area in which conditions of imminent danger exist. Designation is by area, not by individual encounter. The IDP list is broader than the CZTE list.

For any single month, a service member may receive HFP or IDP, but not both. The system automatically pays whichever applies — most members in DoD-designated zones receive IDP, with HFP triggered only on actual hostile-fire events outside IDP areas.

Examples that have historically held IDP status: Iraq, Syria, Jordan border zones, Lebanon, Yemen airspace and territorial waters, Somalia, certain DRC provinces, parts of the Sahel under named operations, Pakistan FATA-adjacent provinces. The full current list is restricted-distribution and updated by SECDEF Memo; ask your S-1 for current designation.

HFP and IDP are paid at the full $225 for any month with any qualifying day. There is no pro-ration. A one-day transit through an IDP area on official duty earns the full month.

37 U.S.C. § 427. Rate: $250/month, tax-free. Payable to members with dependents who are separated from those dependents due to military orders for more than 30 consecutive days.

Service member must (1) have dependents (spouse, qualifying children, qualifying parents); (2) be separated from those dependents due to military orders — deployment, unaccompanied tour, TDY, ship operations; (3) not have dependents able to reside at or near the duty station (typically not at issue for combat deployments).

FSA does not start paying until day 30 of separation. Once 30 days are reached, payment is retroactive to day 1 of separation and continues monthly. For a 12-month deployment, total FSA is $3,000 — not taxed, deposited as a lump retro plus monthly thereafter.

When both spouses are service members and separated by orders, both may receive FSA simultaneously if both meet the eligibility criteria. Sole-parent / dependent-only service members must also have a custodial dependent to qualify.

FSA is the most commonly under-paid entitlement. Finance does not always start it automatically — service members commonly find on return that no FSA was paid and they must back-claim with orders + dependent documentation. Check LES at day 31 of any qualifying separation.

37 U.S.C. § 305, DoDFMR Volume 7A Chapter 17. Tiered by location severity: Tier 1 ($50/mo), Tier 2 ($100/mo), Tier 3 ($150/mo), Plus rate up to $300/mo for the most austere locations. The location list is published in DoDFMR and updated by ASD(M&RA) memo.

Compensates members assigned to designated arduous missions regardless of geographic location. Common HDP-M categories: extended diving operations, certain prisoner-of-war / missing-personnel recovery missions, some chemical/biological response missions. Rates: $150–$450/month depending on mission category.

Authorized for service members who have been continuously deployed away from home station beyond high-tempo thresholds (commonly 220+ days of operational deployment in a 365-day window). Rate scales from $495 to $1,000/month based on consecutive duration. Frequently missed by units that have not formally requested authorization.

HDP can be received in any combination with HFP/IDP, FSA, and CZTE. A service member can stack: base pay (tax-free via CZTE) + HFP/IDP $225 + FSA $250 + HDP-L Tier 2 $100 + HDP-M $250 simultaneously, all tax-free.

HDP entitlements appear on LES under deductions/entitlements with code "HDP-L", "HDP-M", or "HDP-T". If a service member is assigned to a location historically on the list and HDP-L is not appearing on LES within 60 days, request the unit S-1 cross-check the current location codes against DoDFMR Volume 7A Chapter 17.

For rated pilots and combat systems officers actively performing aviation service. Rates by years of aviation service: $150–$1,000/month. Continues during deployment and stacks with CZTE for tax-free treatment in zone.

For enlisted air crew on flying status. Rates $150–$400/month based on cumulative flying years. Same CZTE stacking.

For qualified divers performing diving duty. Rates by qualification tier and frequency: $110–$340/month for enlisted, up to $240/month for officers. Combat dive operations frequently overlap with HDP-M for additional stack.

Distinct from HDP. Covers parachute duty, demolition duty, toxic-fuel handling, certain flight-deck operations, experimental stress duty, weapons-system test duty. Rates range $150–$240/month depending on category. Multiple HDIPs cannot be received simultaneously — only the highest-rated qualifying duty pays.

Compensates enlisted members in designated extremely demanding duties: recruiter, drill sergeant, MTI, certain SOF positions, etc. Rates $75–$450/month. Continues during combat deployment if the assignment is maintained.

Roth TSP contributions are normally made with after-tax dollars and grow tax-free, with tax-free qualified withdrawals. During CZTE months, the contributing income is already federally tax-free. Roth contributions in a CZTE month therefore go in tax-free, grow tax-free, and come out tax-free — a complete tax-free lifecycle that does not exist anywhere else in U.S. retirement law.

Standard 2026 elective deferral limit: $24,000 (projected). For service members receiving CZTE-excluded pay, the Combat Zone Contribution Allowance allows additional contributions up to the §415(c) annual additions limit — approximately $70,000 total for 2026 — using CZTE-excluded compensation. This is uniquely powerful for deployments where re-enlistment bonuses are received tax-free in zone.

Service members in the Blended Retirement System continue receiving DoD matching contributions on their first 5% of base pay during CZTE deployment. That match is into Traditional TSP regardless of where the member directs their own contribution.

Switching contributions to Traditional TSP during a deployment to "lower current tax" — except current tax is already $0 because of CZTE. Traditional contributions in a CZTE month receive no tax benefit going in and are still taxed coming out. Always Roth in a combat zone, unless you are at the §415(c) ceiling.

Authorized when a service member is reduced in rank or reassigned to a lower-pay position through no fault of their own. Maintains the higher previous pay rate for up to a defined period. Rare; commonly applies to medical-board outcomes that downgrade a pay grade.

Authorized for service members hospitalized for combat-related injuries. Rate up to $430/month while hospitalized. Continues HFP/IDP and CZTE for any month with any day of hospitalization due to combat injury. Designed to ensure the income stack does not collapse if a service member is evacuated mid-deployment.

For service members evacuated from a combat zone due to injury or illness, full deployment-related pay (HFP/IDP, CZTE, HDP) continues for the remainder of the original deployment period or until release from medical treatment, whichever comes first. The intent is that an injury does not financially penalize the member or family.

A re-enlistment bonus signed in a combat zone is federally tax-free in full for enlisted members under CZTE. Officer accession or retention bonuses are subject to the officer CZTE cap. Members planning to re-enlist near a deployment should consult the unit retention NCO about timing — a single-day in-zone signing can save thousands.

Standard JTR per diem applies to TDY portions of deployment travel. Once at the operational location, per diem typically converts to an incidental-only rate (commonly $3.50/day) because government meals and quarters are provided. Members should still claim it — it is non-taxable reimbursement, not pay.