Guaranteed vs. Open Contracts

Active-duty recruits sign one of two contract types, and the tradeoff between them is certainty versus speed. Roughly 40% of Air Force job slots fill through guaranteed contracts and the other 60% through open contracts at BMT (1), a split of slots rather than of recruits. This section builds on how job distribution works and building your job list; if you haven't worked through those, start there.

GTEP: you know your job, but you wait

With a Guaranteed Training Enlistment Program (GTEP) contract, you know your exact Air Force Specialty Code (AFSC) before you leave for BMT, along with your tech school location and the rough length of your training pipeline. That's the certainty option.

The price is time. GTEP contracts usually mean longer waits in the Delayed Enlistment Program, often 8 months or more, because you're waiting for a specific job slot to open in a future BMT shipping cycle (2). High-demand AFSCs can stretch that to 12 months or beyond. Your recruiter submits your job list, and you get booked when one of those jobs comes free.

The limitation that catches people off guard: with GTEP you cannot choose your shredout. A shredout is the alpha suffix on an AFSC that designates a subspecialty or equipment type within a career field. Inside 2A5X1 (Aerospace Maintenance), for instance, different shredouts map to different aircraft. The Air Force assigns yours by manning need, not preference.

Open contracts: faster, with a job reveal at week 7

An open contract guarantees placement within one of four career categories, but your specific AFSC isn't set until you're already at Basic. You won't know your exact job until roughly week 7, when tech school orders come down.

The payoff is speed: without a wait for one specific slot, open contracts generally ship faster. They also carry two perks GTEP holders don't get. You can see and select from available shredouts for each AFSC, and you gain access to smaller career fields that may only open up at BMT rather than through recruiting stations.

At Basic, the assignment runs on a schedule:

Per the Air Force Recruiting Service's Guaranteed Aptitude Index (GAI) brochure, about three out of four recruits get one of their top choices this way (3). No official statistics track exact outcomes, though, and results vary with timing, open slots, and qualifications. The terms "Guaranteed Aptitude Index," "aptitude area contract," and "open aptitude" all name the same thing.

The four MAGE aptitude areas

The Air Force builds four composite scores from your ASVAB subtests. Every AFSC sits in one of them, and minimum scores swing widely by job.

There's no single minimum composite that qualifies you for an aptitude-area contract. You just need to score high enough to be eligible for at least some AFSCs within the category. Requirements shift through the year with Air Force manning needs, which is why your recruiter's read on "what's available right now" matters. The full list of AFSCs and minimum scores lives in the Department of the Air Force Enlisted Classification Directory (DAFECD), updated twice a year on April 30 and October 31 (4).

Not every job is available both ways

Some AFSCs aren't equally reachable through both contract types, and a few patterns are worth knowing before you sign.

Security Forces (3P0X1) is currently 100% filled through guaranteed contracts before BMT (1), the only AFSC definitively confirmed as unavailable open. It does show up on the General aptitude job sheet, but only for backfill, filling spots left by recruits who wash out of other pipelines. The old internet wisdom that "open General means you'll get Security Forces" hasn't been true for years. Could backfill land you there? Technically yes. Is it the likely outcome of going open General? No.

Medical runs the other way. Roughly 60% of medical AFSCs fill at BMT through the General area (1), which makes open General attractive if healthcare interests you. One caveat: the Department of Defense began cutting uniformed medical positions by about 20% starting in 2019 (5)(6), thinning the available training slots. The exception is Mental Health (4C0X1), which keeps actively recruiting.

Smaller-manned AFSCs sometimes only open at BMT, giving open holders exclusive shots at niche fields that rarely appear in DEP job drops: certain intelligence roles, specialized maintenance, low-density fields with tiny accession quotas. If you've researched a small career field that rarely shows on guaranteed lists, an open contract in the right area might be your best path to it.

Jobs more often available guaranteed include aircraft maintenance (2A series), vehicle maintenance (2T3X1), civil engineering (3E series), aerospace medical service (4N0X1), and cyber/IT (1D7 series). Jobs harder to guarantee include aircrew (1A series), Air Traffic Control (needs additional ATST testing), linguists (need the DLAB), and special operations, all constrained by limited slots and extra qualification requirements.

What actually decides your open-contract job

If you go open, the assignment system weighs several things when it matches you to an AFSC.

Primary factors: your preference-list ranking, your ASVAB scores within the aptitude area, and whether you meet qualification requirements like physical profile standards, security clearance eligibility, and any additional testing. The system works down your list, so how you rank your choices matters.

Secondary factors: relevant high school coursework, certifications, and prior work experience as each AFSC's functional manager defines them. Rarely decisive, but they can tip a slot when several recruits compete for it.

Above all sits "needs of the Air Force." It isn't just a cliche; it's the final word. If the service urgently needs bodies in a field you're qualified for, that's where the system may place you, wherever that job fell on your list. And you can't shop the result: refuse the assignment and you risk separation, so be genuinely comfortable with the full range of jobs in your aptitude area before you sign an open contract. That range is not a lesser one. Every AFSC in the open system also exists in the guaranteed system, and some of the most sought-after fields (certain intel positions, niche maintenance specialties) are actually easier to reach open, because they're small enough that slots only appear at BMT.

Why the wait got longer

The recruiting climate feeds straight into your contract decision, and it's swung hard in the last two years. As of early 2026, the Air Force DEP holds about 20,000 future Airmen waiting to ship, the highest since tracking began in 2012 (7). At its FY2023 low, that number was near 4,000. Weekly BMT shipments rose from the 500 to 600 range up to 750 to 800 to absorb the surge, but a bigger DEP still means more competition for specific slots and potentially longer guaranteed-contract waits.

The service hit its FY2024 goal of 27,100 active-duty enlisted (finishing at 27,139) after missing in FY2023 for the first time since 1999 (8). The FY2025 goal started near 32,500, was revised down to 29,950 amid budget constraints from a yearlong continuing resolution, and was met three months early (9). FY2026's goal is 32,750 (7).

For your decision, a larger DEP generally means three things: longer waits for guaranteed jobs, potentially better selection at BMT as more slots cycle through the open system, and less recruiter pressure to go open. When recruiting is strong, there's less urgency for a recruiter to push faster-shipping open contracts to meet quotas. Some emphasize open more than others, which is worth knowing, but the program itself serves a real purpose, and your recruiter is working with you, not against you. Learning to read that partnership is the whole point of working with your recruiter. Either way, your recruiter has the current picture for specific AFSCs. These numbers are context; your local squadron is what actually moves.

Reserve and Guard play a different game

Everything above is active duty. For the Air Force Reserve or Air National Guard, job selection works differently and the guaranteed-vs-open question simply doesn't apply.

The Reserve uses unit-based hiring: recruiters fill specific vacancies at local units, so you enlist into a named unit and manning slot and always know your AFSC before shipping. There's no open equivalent.

The Air National Guard is even more localized. Each state or territory runs its own wings with their own missions and publishes Drill Status Guard (DSG) vacancy lists for open positions. Guard recruits, like Reserve recruits, always know their job and unit first, but the available fields depend entirely on what that state needs. A state with F-16 wings won't have C-17 maintenance slots, however qualified you are for them.

If job certainty before shipping is your top priority and part-time service appeals to you, both components offer that by default. Weigh it against the other differences in the component comparison.

Making the call

There's no universal answer here. The right contract turns on what's specific to you. A few questions to sit with:

How much does job certainty matter? If you'll spend all of DEP anxious about your assignment, a guaranteed contract's peace of mind may be worth the longer wait. If uncertainty doesn't rattle you and you trust the system to place you somewhere reasonable, open offers real upside.

Do you have one specific goal? If there's a single AFSC you've thoroughly researched and know fits, waiting for a guaranteed slot makes strategic sense. If you're drawn to a whole category (anything in maintenance, anything in cyber, anything medical), open gives you more options inside it.

How flexible is your timeline? If you need to ship by a certain date for personal, financial, or educational reasons, open contracts typically move faster. If you can afford to wait 8 to 12 months in DEP, a guaranteed contract removes the biggest variable.

Chasing a niche field? Some low-quota AFSCs only surface at BMT. If the one you want rarely lands on guaranteed lists, an open contract in the right aptitude area might be your only realistic route.

Two practical notes before you sign. You can change your mind afterward, but it means working with your recruiter and usually a return trip to MEPS; switching guaranteed to open is easier than the reverse, since going back to guaranteed restarts the queue for a specific AFSC. And bonuses exist for both paths, some tied to a specific AFSC (guaranteed only for that job), others to aptitude areas or quick-ship timelines (open), so ask your recruiter what's currently offered for each.

Talk it through with your recruiter and your family, and don't let anyone, online or in person, insist there's only one right answer. The recruit who waited ten months for a guaranteed Cyber Transport slot made the right call for them. So did the one who shipped open Electrical two months after enlisting and landed in avionics. Different goals, different paths, both valid.