When Should You Take the GRE for Your MBA Application?

When should you register for your first GRE attempt?

If there's any chance you'll want a retake, sit your first GRE attempt at least 31 days — about 4.5 weeks — before your earliest application deadline. That number isn't a rule of thumb: it's built from two fixed ETS policies. You must wait 21 days before retaking the GRE, and an official score takes 8–10 days to reach your designated schools after you sit it. Stack those two windows and 31 days is the minimum runway that guarantees a retake score can still land before your deadline. If you're confident in your prep and won't need a second attempt, ETS's only hard requirement is far looser: register at least two calendar days before your test date.

The backward-planning math, worked example

Most GRE timeline advice online is vague ("give yourself a few months"). Here's the actual arithmetic, using a September 1 deadline as the example:

Move the deadline, and the whole chain shifts with it — but the 31-day buffer between your first attempt and the deadline stays fixed, because it's built from ETS's own retake-wait and score-reporting rules, not from how quickly you feel ready.

This is a worst-case safety margin, not a target. If your diagnostic score is already close to where you need it, you don't need to build in retake room at all — register whenever your prep is genuinely done.

How far in advance do you actually need to register?

ETS's technical minimum is short:

• Online registration: at least 2 calendar days before your preferred test date.
• Phone registration: at least 2 business days before your preferred test date.
• Testing itself runs year-round, on a first-come, first-served basis — there's no application window to catch.

The practical reason to register earlier than the 2-day minimum isn't a hidden rule — it's seat availability. First-come, first-served means your preferred test center, date, and time can already be taken by the time you register, especially if you're set on a specific weekend slot around a full-time job. Locking in a date as soon as you've committed to it protects your preferred slot; it isn't required by ETS.

Test center or at-home — which fits a working professional's schedule?

At-home testing gives a working professional more control over scheduling than a test center does — both use identical content and format, but the booking mechanics differ:

• At-home testing: available around the clock, seven days a week — including evenings and weekends. The one fixed constraint is identity verification: you must complete it through ETS's IDVaaS app at least 72 hours before your appointment, so same-week bookings need that buffer built in.
• Test center: offered on specific dates and locations, subject to whatever seats that center has open. No software or webcam setup required, and no need to find a private, quiet space at home for nearly two hours.

For a working professional squeezing prep around meetings and travel, at-home testing removes the biggest scheduling constraint — you're not tied to a test center's calendar — but it still needs to be booked with the 72-hour ID-verification runway in mind, not the night before.

What if your work schedule slips and you need to reschedule?

You can reschedule your GRE appointment up to 4 days before your test date (10 days if you're testing in Mainland China) without forfeiting your test fee, though a rescheduling fee applies. Inside that window — 4 days out or closer — the fee is forfeited entirely if you reschedule or cancel.

If your job has a pattern of last-minute travel or crunch periods, build slack into your test date rather than scheduling it for the busiest week of your quarter. A rescheduled date still has to clear the same 21-day retake math if a second attempt becomes necessary.

Should you take the GRE before you've finalized your target schools?

Yes — and this is the piece of the timeline most working professionals get backward. GRE scores are reportable for five years from your test date. ETS's own example: a test taken July 3, 2022 stays reportable through July 2, 2027. On top of that, ScoreSelect lets you choose, after the fact, whether to send your most recent score or every administration from the last five years to each school you apply to.

Practically, that means the GRE doesn't have to wait for a finished school list. Sitting it early — before you've researched programs, before essays and recommenders are in motion — clears one of the largest fixed-effort items off your plate while your calendar is comparatively freer. This timeline works the same whether you're building toward a US program's Round 1 or a European program's rounds, like London Business School's — check your specific target program's deadlines, since they vary by school and year, but the GRE itself doesn't need to wait for them.

A week-by-week framework for prepping around a full-time job

Rather than a fixed hour count (no official source publishes a reliable hours-to-score-gain figure, and most claiming one are unverified estimates from test-prep blogs), structure your available weeks into four phases:

1. Diagnostic. Take a full official practice test — ETS's own free POWERPREP materials are the closest simulation of real test conditions — before you review anything. This sets your actual starting point on the 130–170 Verbal and Quant scales, not a guess.
2. Targeted content review. Spend review time on the section and question types furthest from your target, not on a generic syllabus. The CoPilot Prep platform tracks section- and content-area performance from that first diagnostic onward, so review time goes to your specific gaps rather than a one-size-fits-all plan.
3. Timed section practice. The GRE's actual timing is fixed — Verbal runs an 18-minute, 12-question section and a 23-minute, 15-question section; Quant runs a 21-minute, 12-question section and a 26-minute, 15-question section, for 1 hour 58 minutes of total testing time. Drill under those exact splits, not untimed.
4. Taper. One final full-length practice test in your last week, then stop introducing new content 48–72 hours before test day. This is standard exam-tapering practice, not an ETS rule — the goal is walking in rested rather than freshly drilled.

If the gap between your diagnostic and target score is large, or your available weekly hours are thin, work directly with Simon Flynn to build a coaching plan around your specific deadline rather than a generic timeline.

The bottom line

Work backward from your deadline, not forward from today. The 31-day buffer isn't caution for its own sake — it's what protects your ability to submit your best possible score instead of your only one, since a retake only helps you if there's still time for it to land. Confirm the deadline, subtract 31 days if there's any doubt about your first score, and register for that date as soon as you've committed to it — the seat, not the paperwork, is what's scarce.