Guard and Reserve TDY — How the Rules Differ from Active Duty

Guard and Reserve TDY has gotten complicated with all the bad advice and active-duty-centric guides flying around. As someone who stumbled through my first Annual Training as a Reserve component soldier — sitting in a hotel room at Fort McCoy, Wisconsin, genuinely unsure whether I was paying out of pocket forever or waiting on reimbursement I’d never actually see — I learned everything there is to know about how these rules actually work. Most of what I found online assumed I was active duty. I was not. And that distinction costs people real money, constantly. Different order types, different per diem entitlements, different Defense Travel System access, different lodging obligations. This one’s specifically for Guard and Reserve members who are tired of being an afterthought in every TDY guide ever written.

Active Duty Orders vs Guard/Reserve Order Types

Active duty service members operate inside one basic framework — PCS or TDY orders, travel, reimbursement. Clean and simple. Guard and Reserve members have a messier menu, and each order type drags along its own travel and pay entitlements. Getting this wrong at the outset means chasing reimbursements you were never owed, or missing ones you absolutely were.

But what are the order types you’ll actually encounter? In essence, they’re the legal documents that determine your entitlements. But they’re much more than paperwork — they define your entire financial reality for that period of service. Here are the three you’ll see most:

• AT — Annual Training: The standard two-week event most Reserve and Guard members do every year. AT orders put you on full active duty status for the duration. Basic pay, allowances, travel reimbursement under the Joint Travel Regulations — all of it kicks in.
• ADT — Active Duty for Training: Same basic structure as AT but built for specific training courses — MOS qualification schools, professional military education, specialized skill pipelines. ADT orders also confer full active duty status and the travel entitlements that come with it.
• ADOS — Active Duty for Operational Support: This is the long game. ADOS runs anywhere from a few weeks to multiple years, used to fill operational billets active duty forces can’t cover. ADOS members plug directly into active duty travel systems — same per diem, same lodging reimbursements as their active duty counterparts.

Then there’s IDT — your monthly drill weekend. Inactive Duty Training. You are not on active duty status. No per diem. No lodging reimbursement. No M&IE. Some Guard and Reserve members drive four hours each way to drill and eat that cost entirely. That’s the rule. It’s harsh, and it blindsides people every single time.

The order type printed on your orders determines almost everything that follows. Find the block that says “Duty Status” and read it before you book anything. AT, ADT, ADOS — you’re in good shape. IDT — manage expectations accordingly.

Per Diem Eligibility Differences

Probably should have opened with this section, honestly, because per diem confusion is the thing I hear about most. Let me be direct about what you’re owed and when.

Per diem under the JTR covers your lodging cost up to the locality rate, a meals and incidental expenses rate — M&IE — and sometimes a proportional rate depending on the situation. For Guard and Reserve members on AT, ADT, or ADOS orders, the entitlement functions essentially identically to active duty when you’re traveling away from your Permanent Duty Station.

The key phrase is “away from your PDS.” For Guard and Reserve members, the PDS is the unit’s home station — the armory or reserve center, not your house. Subtle distinction. Enormous practical consequences. It affects the 50-mile calculation I’ll get into below.

Here’s how per diem shakes out by order type:

• AT orders: Full per diem when travel is required and the duty location isn’t within commuting distance of the PDS.
• ADT orders: Full per diem under the same conditions as AT. Three weeks at a training school means three weeks of per diem.
• ADOS orders: Full per diem, treated identically to active duty TDY. If the ADOS billet becomes your new PDS, you may draw a housing allowance rather than lodging per diem — depends on order duration and whether dependents are in the picture.
• IDT — drill weekends: Nothing. No per diem, no lodging, no M&IE. You show up, you drill, you drive home on your own dime.

Don’t make my mistake. The first and last days of travel carry a reduced M&IE rate — 75% of the standard daily amount. True for everyone, active or Reserve, but I didn’t know it during my first AT. Submitted a voucher expecting the full daily rate straight through. Finance corrected it without explanation, and I spent a confused Tuesday afternoon buried in JTR Chapter 2 trying to figure out what happened.

DTS Access for Guard and Reserve

Defense Travel System access is something active duty members largely take for granted — it’s there, the unit manages it, booking happens as routine. For Guard and Reserve members, DTS access is not automatic. Not always available. Sometimes functionally nonexistent.

But what is DTS, practically speaking? In essence, it’s a web-based travel booking and reimbursement system managed at the unit level through an Organizational Defense Travel Administrator — the ODTA. But it’s much more than a booking tool; it’s the mechanism that connects your travel to your reimbursement in any reasonable timeframe. If your unit has a competent ODTA who stays current on account management, you may already have access. Many Guard and Reserve units — smaller Army Reserve outfits, Guard units with high administrative turnover — do not maintain consistent DTS access for all members.

Frustrated by a lack of DTS access two days before my AT began, I booked my own commercial airfare at roughly $340 round trip and submitted a paper travel voucher after the fact. Using a credit card I’d have to pay before reimbursement came through. The check arrived eleven weeks later. I would not recommend this path.

Here’s what to do before your next AT or ADT:

1. Contact your unit’s S1 or admin office six to eight weeks before orders begin. Ask specifically whether you have an active DTS profile — not whether DTS exists, whether you have a profile.
2. If no profile exists, request one. The ODTA submits through the DTS Help Desk. Allow at least two weeks for account creation and CAC login verification.
3. If DTS can’t be established in time, ask about a Government Travel Charge Card. Some Guard and Reserve members on ADOS orders get GTCCs. Others don’t. Know before you travel.
4. If neither DTS nor GTCC is available, document everything with original receipts. Paper vouchers exist. They are slow. They work.

Some units still run entirely on paper vouchers for AT — not against regulation, just painful. If yours is one of them, get your DD Form 1351-2 filled out before you leave and submit within five days of returning. The faster you submit, the faster you get paid. That part is genuinely that simple.

Lodging and Transportation Rules

Active duty members on TDY are required to use government quarters when available. The same applies to Guard and Reserve members on AT and ADT orders — and command scrutiny on AT lodging costs runs high, so enforcement can feel stricter than you’d expect.

When government quarters are available at or near your training location, you use them. Choose a commercial hotel instead and you’ll typically receive only the government quarters rate — often dramatically lower than what the hotel actually costs — and absorb the difference yourself. Fort McCoy in February: government barracks are available and expected. A National Guard readiness center in a mid-sized city with no on-post lodging: commercial per diem rate applies.

Always verify quarters availability through your gaining unit before booking anything. A single email to the training point of contact — “Are government quarters available for this training?” — can save hundreds of dollars in disallowed lodging claims. That’s worth sixty seconds of your time.

On transportation: POV mileage reimbursement follows the standard TDY rate — the IRS business mileage rate as adopted by the JTR, sitting at $0.67 per mile as of 2024. Same rate active duty members get. Not the PCS rate, which is different and lower.

There’s a cap worth knowing, though. If driving to the TDY location costs more than a government-procured airfare would have, the government reimburses only up to that constructive airfare cost — not your full mileage. This matters for Guard and Reserve members who routinely drive long distances to Annual Training rather than flying. Run the math before you leave. If flying is cheaper and you drive anyway, you’re eating the difference.

The 50-Mile Rule

This one catches Guard and Reserve members off guard more than almost anything else in the JTR. Here’s the core rule: when a Guard or Reserve member is ordered to a duty location within 50 miles of their Permanent Duty Station, per diem is generally not authorized.

That’s what makes the PDS definition so endearing to us Reserve component folks — by which I mean maddening. For active duty, the PDS is typically on or near the installation where they live and work. For Guard and Reserve, the PDS is the home unit’s armory or reserve center. Not your house. The armory.

Here’s a scenario that plays out constantly. A Guard member lives 65 miles from the armory. The armory sits 30 miles from the AT training site. PDS is the armory. Training site is 30 miles from PDS. No per diem — because the threshold isn’t met. The 65 miles this member drove from home is completely irrelevant to the calculation.

Flip it: another Guard member lives 10 miles from the armory, and the AT site is 80 miles from that armory. PDS to training site is 80 miles. Per diem authorized. This person gets full daily per diem despite driving a shorter total distance from their house than the first member. That’s not a quirk — that’s the rule working exactly as written.

The 50-mile threshold applies primarily to AT and ADT orders. ADOS orders — particularly long-duration ones — may be treated differently if the gaining command establishes a new PDS at the ADOS duty location. When that happens, the original armory stops being the relevant PDS entirely, and the calculation changes.

There are also circumstances where the rule doesn’t apply or gets waived:

• When the nature of training requires overnight presence regardless of distance — certain field exercises, for instance, where leaving isn’t operationally feasible
• When orders specifically authorize per diem regardless of distance — some issuing authorities build this language in, so read your orders carefully
• When a commander determines mission requirements necessitate members remaining overnight at the training site

My honest advice: before any AT or ADT, measure the distance from your armory’s actual street address to the training location’s actual street address using a map tool. Write the number down. If it’s under 50 miles, ask your S1 explicitly whether per diem is authorized on your specific orders — and get that answer in writing before you spend a dollar expecting reimbursement.

Getting It Right Before You Leave

The broader pattern here is straightforward even if the details aren’t. Guard and Reserve members fall under the same JTR that governs active duty travel — but the starting conditions differ. Different order types, different duty station definitions, different system access. The regulation doesn’t always spell out the Guard and Reserve context explicitly, which means members default to active duty assumptions that simply don’t fit their situation.

Before any TDY-equivalent travel on Guard or Reserve orders: confirm what your order type actually authorizes, verify your DTS access or paper voucher process, measure armory-to-training-site distance, check government quarters availability, and keep every receipt regardless of what you expect to get back. The members who get paid correctly are the ones who treat the admin work as seriously as the training itself. Unglamorous. Necessary. Worth doing right the first time.