When to Start Studying for MCAT?

Last updated: September 2026. Written by Josh Hutcheson, OnlineCourseing editor. Test dates, registration windows, fees and study guidance re-read directly on the AAMC’s MCAT pages on 21 September 2026. See our review methodology.

THE SHORT ANSWER

THE 2027 MCAT YEAR AT A GLANCE (AAMC, 21 SEPTEMBER 2026)

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Step 1: Pick your test date before your start date

“When should I start studying?” has no answer until you know when you are testing. The AAMC’s own guidance on timing boils down to three questions, and they are the right place to begin.

When do you want to start medical school?

Work backwards. The AAMC notes that if you want to go straight from college to medical school, you would take the MCAT and start your application in your junior year, the year before you plan to enrol. Its example: to start medical school in fall 2026, you might test during 2025. The same logic puts a fall 2028 start in the 2027 testing year, which runs from 15 January to 11 September 2027.

Might you need to test more than once?

Many people do, and the AAMC says it is no disadvantage in itself. But a retake needs room: scores take 30 to 35 days, and you can hold only one appointment at a time. If you want that option, test early in the testing year. Our guide to how many times you can take the MCAT covers the limits and a realistic retake calendar.

Have you covered the content?

No courses are formally required to register, but the exam draws on introductory biology, general and organic chemistry, and physics, plus first-semester biochemistry, psychology and sociology. If some of those are still ahead of you, the AAMC suggests testing later in the year so you have finished the coursework. Learning a subject for the first time takes far longer than revising it, and that difference drives your start date more than anything else.

Step 2: Take a free baseline test to measure the gap

The fastest way to decide how early to start is to find out where you stand today. The AAMC’s study-plan guide lays out the sequence, and every part of it is free:

1. Read the official content outline so you know what the exam covers.
2. Take the MCAT Official Prep Unscored Sample Test (free with an AAMC account) to set your baseline.
3. Open the Content & Skills Breakdown in your score report to see where you lost points.
4. Rate each topic in the free What’s on the MCAT Exam course as low, medium or high confidence. The course links to open textbooks and Khan Academy lessons and now includes 120 free practice questions.

Then compare your baseline with your target. Your target should come from the schools you want, not from a round number. Look up admitted-student MCAT ranges in the AAMC’s Medical School Admission Requirements guide, and use our MCAT percentiles page to see where a score sits. On the current AAMC table, a 500 is the 48th percentile, a 508 the 74th and a 515 the 91st.

READING YOUR GAP

As a rough guide, this is how we would translate the gap into a starting point. It is our editorial rule of thumb, not an AAMC figure, and it assumes the prerequisite courses are finished:

Re-test after the first month. A baseline taken cold understates what you already know, and your second practice score is often the better guide to how long the rest will take.

An MCAT timeline by college year

For a student going straight from college to medical school, the AAMC’s junior-year guidance turns into a simple multi-year plan. Shift it by a year if you plan a gap year.

Non-traditional applicants, such as career changers or those finishing post-baccalaureate courses, follow the same logic with a different clock: complete the prerequisites, take the baseline, and count back from the application you are aiming for.

Choosing a test month

The 2027 testing year runs from mid-January to mid-September, and each part of it suits a different kind of candidate:

• January to March. Scores come back in February to April, which leaves the most room for a retake in the same year. The catch is that your study block falls across the autumn semester and winter break.
• April to June. A common window for students applying the same year. It lets you study through the spring semester, or finish the semester and test soon after, while scores still arrive before mid-summer.
• July to September. Useful for summer study and for gap-year applicants. Scores arrive between August and October, which is late for a same-year application and leaves no room for another attempt that year.

Whichever month you choose, a score you already have in hand is a stronger position than a score you are waiting on, both for your application and for deciding whether to retake. See how long MCAT results take for the release timing.

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Step 3: Turn the gap into hours, then weeks

The AAMC does not publish a recommended number of study hours. It says your baseline determines how long each step takes, which is the honest answer. The planning figure you will see quoted most often is around 300 hours. Use it as a starting estimate, then move it up or down once you know your gap. The arithmetic is simple:

Build in slack. Illness, exams and work deadlines will take weeks out of any plan, so add two or three buffer weeks to whatever the table says. If the numbers push your start date earlier than you can manage, move the test date rather than squeezing the hours.

When is it too early to start?

Starting a year ahead sounds safe but rarely helps. Content learned in a burst and then left alone fades, and you end up relearning it in the final months. Two situations are genuine exceptions:

• You are still taking the prerequisites. Here the early “study” is simply doing well in those courses, and reviewing them with the MCAT outline in mind.
• CARS is your weak area. Critical Analysis and Reasoning is a skill built slowly by reading dense passages regularly. A few hours a week, months ahead, is time well spent.

Otherwise, if you are more than eight months out, the best use of the time is to finish your coursework and take the free baseline test so you know where you stand.

When is it too late?

It is too late when the hours you need no longer fit before your test date. Signs you are there:

• Your baseline is well below your target and you have fewer than eight weeks left.
• Your full-length practice scores have not moved in three or four weeks.
• You would need more than 35 to 40 hours a week on top of other commitments to finish.

The fix is to move the date, and the cost is lowest the earlier you decide. Rescheduling costs $55 at 60 or more days out, $110 at 30 to 59 days and $210 at 10 to 29 days, and no changes are allowed inside 10 days. See the AAMC’s scheduling fees. A moved date is much cheaper than a wasted attempt, which still counts toward your limits even if you void it.

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The four phases of MCAT preparation

Whatever your timeline, the work falls into the same four phases. The AAMC describes the middle two as a study-and-practice cycle built on active learning: recall, practice and reflection, rather than rereading.

Phase 1: Assess

Covered in step 2. The output is a ranked list of topics: what you need to learn for the first time, what you need to refresh, and what you can leave for light review.

Phase 2: Learn and practise

Work through your weakest areas first, and mix in practice questions from the start rather than saving them for the end. Questions show you whether you understand a topic well enough to apply it, which reading alone cannot. Keep a running log of every missed question with a one-line note on why.

Phase 3: Full-length practice

The AAMC’s advice is specific: take its free Practice Exam One under test-day timing, review every incorrect or flagged question, and spend the time between practice exams on the content areas where you made mistakes. The review is where the points come from; a practice test you do not review is mostly stamina training.

Phase 4: Final stretch

Stop taking new full-lengths in the last few days. Revisit your missed-question log, settle your sleep schedule to match an early start, and sort out logistics. Our checklist of what to bring to the MCAT covers ID rules and what is allowed in the room.

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Build stamina for a six-hour exam

The MCAT is 230 questions over 6 hours 15 minutes of testing, before breaks and check-in. That length is a skill in its own right, and the only way to build it is to practise at full length. The structure, from the AAMC’s section overviews (for example CARS):

Breaks are optional, and unused time does not carry over to the next section. Take your full-length practice exams at the same start time as the real one, which is usually 8 a.m., and practise using the breaks the way you will on the day.

Sample MCAT study schedules

Three common situations, each built on the arithmetic above. Adjust the hours to your baseline.

Three months, full time (summer or gap period)

Six months, alongside classes

Four to five months, working full time

Working full time is the hardest version. Protect one long block each weekend for full-length practice, and consider an earlier start rather than more hours per week.

Self-study, a prep course or a tutor?

How you study also changes how early you should start. Self-study needs more time for planning and self-correction; a course front-loads the structure.

Start with the free AAMC materials whichever route you choose; they are the closest thing to the real exam. If you add a course, Kaplan is the one on our list that covers every format, from on-demand to in-person and tutoring, and it offers a higher-score-or-money-back guarantee with conditions. Our best MCAT prep courses guide compares it with Blueprint, the Princeton Review and the free routes, and best MCAT resources covers books and question banks.

If cost is the barrier, the AAMC Fee Assistance Program reduces registration to $145 and includes free MCAT Official Prep products. You must be approved before booking, and the AAMC asks for applications at least five business days before registration opens.

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When to register for your MCAT date

Register as soon as your testing year opens, even if your study start is months away. For 2027, scheduling opens by region at noon Eastern on 20 October 2026 for much of the eastern US, 21 October for the central and western states, and 22 October for Canada, US territories and international centres, per the AAMC’s 2027 registration page. The AAMC asks you to complete the first five tabs of the registration system between 5 and 19 October so you are ready on the day.

Four 2027 dates, 30 January, 14 May, 9 July and 28 August, run only at select centres in major cities, so check the calendar before you plan around them. Booking early costs little: moving a date 60 or more days out is $55, and cancelling that far ahead refunds $175 of the $355 fee.

Two situations that change the timeline

You need testing accommodations

If you have a disability or medical condition that calls for adjusted testing conditions, add the approval process to your timeline. The AAMC’s MCAT Essentials says you must be approved and have a scheduling request submitted to Pearson VUE no later than 15 days before your test date, and that a standard appointment booked online is not guaranteed to support your approved accommodations. For 2027 the AAMC is offering advance scheduling to examinees with approved accommodations, with details sent in September. In practice, apply well before registration opens, and before you fix your study start date.

You are applying to DO schools, or to both MD and DO

Nothing changes. The AAMC states that preparation for the MCAT does not differ for examinees applying to MD-granting or DO-granting schools, so the same timeline, baseline and schedule apply. What may differ is the score range your schools admit, which is one more reason to set your target from your own school list.

Keeping it sustainable

A three-to-six-month plan fails more often from burnout than from a lack of content. A few habits make the difference:

• Schedule a rest day every week and treat it as part of the plan, not a reward.
• Set daily goals by output, not hours: “review 40 practice questions and log every miss” beats “study biology for three hours.”
• Review the plan every two weeks. If full-length scores are flat, change the method before adding hours.
• Sleep on the test-day schedule for the final two weeks.

Expect your practice scores to plateau at some point; almost everyone’s do. A flat stretch of two or three weeks usually means the easy gains are used up and the remaining points sit in your review, not in more hours. Go back to your missed-question log, look for patterns (a content area, a question type, running out of time), and change what you practise.

Tell the people around you what the next few months look like. Study plans survive better when family, flatmates and employers know which evenings and weekends are spoken for, and when you have agreed in advance what you will drop if something has to give.

When to start studying for the MCAT: FAQs

When should I start studying for the MCAT?

Three to six months before your test date is the usual window: about three months if you can study full time, closer to six if you are taking classes or working. Pick the test date first, by working back from when you want to start medical school, then count back from that date using your baseline practice score.

How many hours should I study for the MCAT?

The AAMC does not publish an hours figure; it says your baseline decides how long each step takes. A planning figure you will see widely quoted is around 300 hours. Treat it as a starting estimate, then adjust after your first practice exam: a strong baseline may need less, a weak one considerably more.

Is 3 months enough to study for the MCAT?

It can be, if you have finished the prerequisite coursework and can give it 25 or more hours a week. Three months at 25 hours is about 300 hours. It is tight if you are also carrying a full course load or a job, or if your baseline practice score is far below your target.

Is 6 months too long to study for the MCAT?

Not if the hours are spread thin because of school or work. Six months at about 12 hours a week reaches the same total as three months full time. It becomes too long when you front-load content you will forget before test day; keep a steady cycle of review and practice questions throughout.

What year of college should I take the MCAT?

The AAMC’s guidance is to take it, and start your application, in your junior year if you want to go straight from college to medical school; more generally, the year before you want to enrol. That usually means studying through the spring of junior year and testing between January and summer.

Do I need to finish my science classes before studying for the MCAT?

No courses are formally required, but the exam tests introductory biology, general and organic chemistry, physics, and first-semester biochemistry, psychology and sociology. Most students start serious prep once those are done or nearly done, because learning content for the first time takes far longer than reviewing it.

When should I take my first practice test?

Before you plan anything else. The AAMC recommends its free unscored Sample Test to establish a baseline, then its free Practice Exam One under test-day timing. Your first score tells you how far you are from your target, which decides how early you need to start.

Can I study for the MCAT while working full time?

Yes, but give yourself more calendar time rather than more hours per week. About 12 to 15 hours a week over five to six months reaches the usual planning total. Protect one long weekend block for full-length practice exams, and keep weekday sessions short and focused on practice questions and review.

When should I register for the MCAT?

As soon as registration opens for your testing year. Scheduling for all 2027 dates opens on 20, 21 or 22 October 2026, depending on your test centre’s location, and popular dates and centres fill first. You can reschedule later for a fee, up to 10 days before the exam.

Bottom line

Choose your test date first, by working back from when you want to start medical school and leaving room for a retake. Then take the AAMC’s free Sample Test, compare your baseline with your schools’ ranges, and count back the hours. For most people that lands three to six months before the exam. If the arithmetic does not fit, move the date, not your sleep.

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