A month-by-month plan for AMCAS (MD) and AACOMAS (DO).
By David Tashjian· Post-bacc pre-med student · Last updated June 2026
Medical school admissions are rolling, which means applications are reviewed as they arrive and seats fill as the cycle progresses. Applying early isn't a minor advantage — it's one of the biggest controllable factors in your odds. This guide lays out the full cycle month by month so you submit at the front of the line, not the back.
The one rule that matters most: Submit your primary application as close to the opening date as possible, with your MCAT score already in hand. Everything below is built around that goal.
The Big Picture
The application cycle spans roughly 14 months, from the spring before you want to matriculate to the following summer. There are two main application services:
AMCAS — the centralized application for MD (allopathic) schools. Opens for submission in late May/early June.
AACOMAS — the centralized application for DO (osteopathic) schools. Opens slightly later, in early-to-mid June.
Month-by-Month
Winter — Spring (Jan–April): Foundation
Finalize and take your MCAT if you haven't already — ideally with results back before primaries open.
Build your school list: 15–25 schools balanced across reach, target, and safety based on your MCAT and GPA. Use the MSAR database for MD data.
Request letters of recommendation now — give writers 6–8 weeks. Aim for two science professors, one non-science professor, and one physician or clinical supervisor.
Start your personal statement. Expect multiple drafts over 2–3 months.
May: Pre-Writing
AMCAS opens for data entry in early May. Enter everything — coursework, experiences, personal statement — so you're ready to submit the moment submission opens.
Draft your Work & Activities section: up to 15 entries, with your three most meaningful getting an extended description. Choose carefully and write specifically.
Late May – June: Submit Primary
Submit your AMCAS primary within the first one to two weeks of submission opening. AACOMAS follows shortly after.
Verification (AMCAS checking your transcripts against your entered coursework) takes several weeks at peak, so early submission means earlier verification and earlier delivery to schools.
June – August: Secondaries
Schools send secondary essays soon after receiving your verified primary. They come in waves and can pile up fast.
Pre-write your secondaries. Most schools reuse prompts year to year, so draft answers in advance from last cycle's questions.
Return each secondary within about two weeks. Fast, thoughtful turnaround signals genuine interest.
August – January: Interviews
Interview invitations roll out from late summer through winter. Practice with mock interviews and know your story cold.
Most interviews are now virtual or use the MMI (multiple mini-interview) format — prepare for both traditional and scenario-based questions.
October – Spring: Decisions
MD acceptances begin October 15. DO acceptances can come earlier. Waitlist movement continues into the summer.
If you're waitlisted, a concise, sincere letter of intent or update can help — follow each school's stated preferences.
When Should You Apply?
Apply the cycle in which your application is genuinely strong, not the earliest one you can technically manage. Traditional students typically apply the summer after junior year. Post-bacc students and career changers should apply after finishing prerequisites and earning a competitive MCAT — a gap year is common, increasingly normal, and often makes for a far stronger application.
Break it into weekly tasks: The application is overwhelming as one block but manageable in pieces. Week 1: school list. Week 2: activities list. Week 3: personal statement draft. Week 4: request letters. One piece at a time keeps it from snowballing — especially helpful if you're managing ADHD or anxiety.
Don't Sabotage Yourself by Rushing
Early matters, but a polished application submitted in mid-June beats a sloppy one submitted on day one. Get your essays edited, double-check your activity descriptions, and make sure your MCAT reflects your ability. The goal is early and excellent.
What "Verification" Actually Means
After you submit your AMCAS primary, it enters verification — a process where AMCAS staff check your self-reported coursework and grades against your official transcripts and recalculate your GPA using their own standardized system. This is why you must request transcripts early; a single missing transcript stalls the entire application. At peak season (late June and July), verification can take several weeks, and your application isn't sent to schools until it's verified. Submitting in the first week or two of the cycle is the single best way to beat the verification bottleneck.
What It Costs
Applying to medical school is expensive, and budgeting for it early prevents nasty surprises. The AMCAS primary carries a base fee plus a per-school charge for each additional program. Secondary application fees typically run $75–$150 per school, and with 15–25 schools that adds up quickly. Then come MCAT registration, score reports, and travel for any in-person interviews. The Fee Assistance Program (FAP) from the AAMC can substantially reduce these costs for eligible applicants — apply for it before you submit, since it also discounts the MCAT and MSAR.
Plan for it: A full application cycle to 20 schools can realistically cost $3,000–$6,000 once secondaries, score reports, and interview travel are included. Check FAP eligibility early.
Pre-Writing Secondaries: The Highest-Leverage Move
Secondary essays arrive in waves right when you have the least energy, and the schools that reuse last year's prompts (most of them) reward applicants who answer fast. The smartest thing you can do all cycle is pre-write secondaries before they arrive. In May and early June, pull last year's prompts from databases that catalog them, and draft answers to the most common themes — "Why our school?", diversity, adversity, and a meaningful experience. When the real prompts land, you're editing instead of writing from scratch, and you turn each one around in days instead of weeks.
Preparing for Interviews
Interview invitations roll out from late summer into the winter. Two formats dominate: the traditional one-on-one conversation and the MMI (multiple mini-interview), a circuit of short scenario-based stations. Prepare for both. Know your own application cold — you should be able to speak naturally about every experience you listed. Practice common questions out loud (not just in your head), do at least one mock interview, and prepare a few thoughtful questions to ask your interviewers. For MMIs, practice thinking out loud through ethical scenarios; there's rarely a single "right" answer, and they're assessing your reasoning and communication.
Common Timeline Mistakes
Requesting transcripts late. One missing transcript freezes verification for everyone-but-you. Send them before you submit.
Taking the MCAT too late. A great score that arrives in September means your file is reviewed late in a rolling cycle. Test early enough that your score is in hand near submission.
Letting secondaries pile up. Two-week turnaround is the target; pre-writing is how you hit it.
Submitting day one with errors. Early and sloppy loses to early and clean. Proofread the activities section especially.
Key takeaways
Admissions are rolling — submit your primary in the first week or two with your MCAT already in hand.
Request transcripts early to clear verification fast.
Pre-write secondaries in May/June so you can return them within two weeks.
Budget several thousand dollars; check AAMC Fee Assistance eligibility before applying.
Frequently Asked Questions
When exactly does AMCAS open?
AMCAS typically opens for data entry in early May and opens for submission in late May or early June. Exact dates vary by year — confirm on the AAMC site for your cycle.
Can I submit my primary before taking the MCAT?
Yes, but it's usually best to have your score in hand or scheduled soon. Schools generally won't make decisions without an MCAT score, and a late score delays your review in a rolling cycle.
How many schools should I apply to?
A common range is 15–25, balanced across reach, target, and likely schools based on your MCAT and GPA. Use the MSAR to calibrate to real admissions data.
Is a gap year going to hurt me?
No. Gap years are now common and often strengthen an application by adding clinical hours, research, or a stronger MCAT. Apply when your application is genuinely competitive.