Military Commissary & Exchange System — DeCA, AAFES, and MWR

The military commissary and exchange system is one of the most tangible day-to-day benefits for active duty service members, military retirees, and their families. Under 10 U.S.C. §§ 2481–2491, the Department of Defense operates two parallel systems: the Defense Commissary Agency (DeCA), which runs commissary stores (essentially government-subsidized grocery stores) at prices set at cost plus a 5% surcharge, and the exchange system (Army and Air Force Exchange Service, Navy Exchange, Marine Corps Exchange), which runs retail, food, and service outlets on military installations. Together, these systems are estimated to save an eligible military family roughly $4,000–$5,000 per year compared to shopping at civilian retailers — and they operate at over 230 commissary locations and thousands of exchange locations worldwide.

Current Law (2026)

Legal Authority

• 10 U.S.C. § 2481 — Defense commissary and exchange systems: existence and purpose: the Secretary of Defense must maintain a worldwide commissary system and a separate worldwide exchange system; both exist to provide quality goods at reduced prices to authorized patrons
• 10 U.S.C. § 2482 — Commissary stores: criteria for establishment or closure: active duty members and their dependents are the primary customers when siting decisions are made; store size must account for the number of authorized patrons likely to use it
• 10 U.S.C. § 2483 — Commissary stores: use of appropriated funds: Congress must appropriate funds to cover the cost of running the Defense Commissary Agency and its stores; operating costs (salaries, utilities, equipment) come from the appropriation, not from sales revenue; this is what makes commissary prices lower than commercial grocery stores
• 10 U.S.C. § 2484 — Commissary stores: merchandise and pricing: commissaries may sell full grocery assortments including meat, produce, dairy, bakery, frozen and shelf-stable foods, household goods, tobacco, health and beauty, and magazines; the 5% surcharge on all merchandise covers commissary construction and renovation costs through a non-appropriated fund
• 10 U.S.C. § 2485 — Commissary stores: operation: private operators may run some services within commissaries (such as bakeries or food service areas) under approved arrangements, but private operators cannot manage the stores or purchase the goods sold; core operations remain government-run
• 10 U.S.C. § 2487 — Relationship between commissary and exchange: the two systems must remain separate operations; they cannot pool profits, combine management, or cross-subsidize each other (with limited exceptions for combined stores under § 2488)
• 10 U.S.C. § 2488 — Combined stores: the Secretary may authorize up to 10 combined exchange/commissary stores, but only on bases that are closing or realigning under BRAC proceedings — a cost-saving measure for installations too small to support two separate stores
• 10 U.S.C. § 2491 — Uniform funding for MWR programs: the Secretary may allow appropriated MWR funds to be treated as non-appropriated funds for flexibility in program delivery; this affects how exchange profits fund base recreation facilities

The Two Systems: Commissary vs. Exchange

Commissaries are the military grocery store. DeCA operates them as a government benefit — Congress pays operating costs (salaries, utilities, store operations), and shoppers pay only the actual cost of goods plus a 5% surcharge. The 5% surcharge funds construction and renovation. Because there is no profit margin, prices are consistently lower than civilian grocery stores. A military family buying the same basket of groceries at a commissary instead of a Walmart or Kroger typically saves 20–30%.

Exchanges are a different model. AAFES, NEXCOM, and MCX operate like for-profit retailers on military installations — they charge market prices and pursue sales. But because exchanges don't pay state or local taxes and operate on land the federal government provides, their prices are generally competitive with major retail chains. The profits don't go to shareholders — they fund Morale, Welfare, and Recreation (MWR) programs: base gyms, recreation facilities, childcare programs. See also Military Housing Privatization for related on-base quality-of-life infrastructure, outdoor recreation, and sports leagues that DOD does not fully fund through appropriations.

Online access: Both systems have expanded significantly online. AAFES operates the shopmy.exchange.com website; DeCA runs commissaries.com for ordering. Active duty members stationed far from a military installation (or deployed) can often access these benefits online.

Who Can Shop

Eligibility is set primarily by statute and DOD implementing regulations (DoD Instruction 1330.17):

Always eligible:

• Active duty service members (all branches including Coast Guard)
• Retired military members and their dependents
• Reserve and National Guard members on active duty orders of 30+ days, and their dependents
• Surviving spouses of service members who died on active duty or after qualifying retirement
• Medal of Honor recipients
• Dependents of active duty members (including children up to age 23 if enrolled in college)

Expanded eligibility (added by 2017 and subsequent authorizations):

• Veterans with a 100% disability rating (service-connected) — commissary and exchange access
• Primary caregivers of veterans under the VA Program of Comprehensive Assistance for Family Caregivers (PCAFC) — exchange access

Not eligible (absent specific orders or authorization):

• Veterans with less than 100% disability rating who are not retirees
• Reserve/Guard members who are not on qualifying orders
• Most civilian DOD employees (except in overseas theaters under special rules)

Why Congress Funds Commissaries

The commissary system is a deliberate compensation strategy. Military pay, while improving, has historically lagged private-sector equivalents for comparable skills. The commissary benefit provides a significant non-taxable compensation supplement — particularly valuable for junior enlisted families. A family of four with E-4 pay in a high-cost-of-living area may save $3,000–$5,000 per year shopping at the commissary, a benefit they would not receive in other federal employment or most private jobs.

Congress periodically debates the commissary subsidy cost (approximately $1.2 billion per year in appropriations). Proposals to reduce the subsidy or convert commissaries to a AAFES-style model (market-based pricing, no appropriation) have faced persistent opposition from military advocacy organizations who view commissary access as a core part of the military compensation package. The 2016 defense authorization significantly restructured commissary funding but maintained the appropriated funding model.

Overseas Operations

Commissaries and exchanges operate on U.S. military bases in over 30 countries. Overseas commissaries function under agreements with host countries that typically exempt purchases from local taxes (Status of Forces Agreements — SOFAs). Section 2489 allows the Secretary of Defense to limit what or how much eligible patrons may buy overseas to prevent resale that would violate treaty obligations or host-country law. On some overseas bases, commissary and exchange operations are combined for efficiency.

Implementing Regulations

Exchange employees — the people who work the registers at AAFES stores, stock shelves at Navy Exchanges, and run MWR facilities — are nonappropriated fund instrumentality (NAFI) employees. They work for entities that operate outside the normal federal appropriated fund structure, which historically meant their retirement coverage was separate from the CSRS/FERS system covering most federal employees. 5 CFR Part 847 — Elections of Retirement Coverage by Current and Former NAFI Employees — implements the statutory election rights Congress created to bridge that gap:

• Subpart A (§§ 847.101–847.106) — General Provisions: establishes that this Part implements the Portability of Benefits for Nonappropriated Fund Employees Act of 1990, section 1043 of the NDAA for FY1996, and sections 1131–1132 of the NDAA for FY2002; applies to NAFI employees at AAFES (Army/Air Force Exchange Service), Navy Exchange Service Command, Marine Corps Exchange, and Coast Guard Exchange, as well as MWR operations; OPM issues eligibility determinations and guidance; DoD and Coast Guard issue parallel regulations for their own NAFI retirement systems
• Subpart B (§§ 847.201–847.211) — Prospective Elections: when an employee moves from a NAFI position to a federal civil service (appropriated fund) position — or vice versa — they may elect to continue CSRS or FERS coverage rather than switching to or from the NAFI retirement system; prospective elections are governed by 5 U.S.C. §§ 8347(q) and 8461(n); the election must be made within a defined window after the qualifying move
• Subparts C–G — Retroactive Elections (NDAA 1996): NAFI employees who moved to civil service positions before the 1990 Act took effect had no prospective election right; Congress created a retroactive path in section 1043 of the NDAA 1996 allowing eligible employees (and former employees or their survivors) to retroactively elect CSRS or FERS coverage for prior NAFI service; Subpart C governs procedures; Subpart D defines the election types and eligibility; Subpart E covers transfer of retirement contributions to the Civil Service Retirement and Disability Fund; Subpart F sets employee cost calculations (actuarial present value of crediting NAFI service); Subpart G governs benefit computation under retroactive elections
• Subpart H (§§ 847.801–847.809) — Credit NAFI Service for Retirement Eligibility (NDAA 2002): a later expansion under NDAA FY2002 (section 1132) allows eligible employees to count NAFI service toward meeting the years-of-service threshold for an immediate CSRS or FERS retirement — even without retroactively switching their NAFI retirement contributions; OPM determines eligibility; elections are subject to reconsideration under the standard FERS reconsideration rules
• Subpart I (§§ 847.901–847.912) — Annuity Computation: sets the formula for computing a CSRS or FERS annuity that includes credited NAFI service under Subpart H; the NAFI service period is credited in the annuity formula but uses an actuarial adjustment reflecting that NAFI contributions may not have flowed into the Civil Service fund

The practical effect: a long-career AAFES employee who spent 15 years at the exchanges before moving to a GS civil service position may be able to count some or all of those NAFI years toward CSRS/FERS retirement eligibility and annuity computation — either through prospective election at the time of transfer or through the retroactive paths Congress created. Eligibility determinations on Subpart H elections are made by OPM and are subject to MSPB appeal. The DoD and Coast Guard issue parallel agency-level regulations implementing these rights for their specific NAFI retirement systems.

How It Affects You

If you're on active duty: Your commissary and exchange access is automatic — present your military ID. DeCA commissaries post weekly sales at commissary.com, and the Commissary Rewards digital coupon program (commissary.com/savings) offers additional savings. The exchange system (AAFES, NEXCOM, MCX depending on branch) includes tax-free gas stations (in most states), optical shops, food courts, and specialty retailers. Exchange purchases are exempt from state sales tax, which alone can represent 5–10% savings on most purchases. AAFES operates the Star Card credit program for service members with limited credit history, and the myEagle mobile app consolidates commissary and exchange access.

If you're a military retiree: Your commissary and exchange benefit continues for life after 20+ years of active service — it's part of the retirement compensation package. If you've relocated far from a military installation, the ShopMyExchange.com online store and commissary.com delivery options (via Instacart partnership at some commissaries) have significantly expanded geographic access to the benefit. Check whether your nearest installation requires pre-registration for gate access as a retiree — some installations now require the Retiree ID card scan or prior coordination for base entry.

If you're a 100% service-connected disabled veteran: The 2017 NDAA opened commissary and exchange access to veterans rated at a combined 100% service-connected disability (P&T or otherwise). To get your credential, visit a VA regional office with your VA disability determination letter showing 100% rating, or use the ID.me verification process to obtain your Veteran Designation on your VHIC card. Once credentialed, access is the same as for retirees. Note: this benefit is for you personally — dependents of 100% disabled veterans do not automatically receive commissary access unless the veteran is also a retiree.

If you're a surviving military spouse: You retain commissary and exchange access following a service member's death in most circumstances. Benefits may change if you remarry before age 55, depending on the service member's rank and circumstances of death; surviving spouses of members who died on active duty or from service-connected conditions generally have the most durable access. Confirm your specific entitlement with your installation's ID card office or DEERS (Defense Enrollment Eligibility Reporting System). See Military Spouse Benefits for the full range of family entitlements at 1-800-538-9552.

State Variations

The commissary and exchange system is entirely federal — state law has no role in how the stores operate. Critically, purchases at military commissaries and exchanges are generally exempt from state and local sales taxes, both because they operate on federal land and because of longstanding state tax exemptions recognized for military benefit programs. The exact treatment varies by state for online purchases and off-base exchange operations.

Pending Legislation

Congress regularly adjusts commissary eligibility and funding through National Defense Authorization Acts. Proposals to expand access to all veterans (not just 100% disabled) have been introduced but not enacted as of 2026. The ongoing debate about the appropriate level of appropriated funding for commissary operations continues as DOD looks for efficiencies.

Recent Developments

DeCA and AAFES have significantly expanded their online and delivery options since 2020, allowing eligible patrons to shop remotely. AAFES launched a curbside pickup program at many installations. DeCA's "Commissary Click2Go" service allows online ordering for curbside pickup. The 2020 expansion of exchange shopping access to all honorably discharged veterans online (not just in-store access) was a significant policy change that allowed millions of veterans to shop on the AAFES website for the first time, though these veterans do not have in-store commissary access.