How Many Times Can You Take the ISEE? Retake Rules for 2026-2027

The Short Answer

You can take the ISEE once per testing season, and there are three seasons per year. That means a maximum of three attempts per year.

If your child takes the ISEE in October (fall season), they cannot retake it until December (winter season) at the earliest.

ISEE Retake Rules for 2026–2027

The one-per-season rule hasn't changed, but it's worth knowing the exact testing windows for the current admissions cycle. For the 2026–2027 testing year, the three ISEE seasons fall as follows:

Each season allows exactly one attempt. If your child tests in October 2026 (Fall), the earliest they can retest is December 2026 (Winter) — and if they test again in Winter, the next opportunity is Spring/Summer 2027. Exact test dates within each season are set by individual test centers and schools, so check with your preferred testing site at erb.org for the specific calendar.

Because most private school admissions decisions are made for the following academic year, the Fall and Winter seasons are when the overwhelming majority of applicants test. Spring/Summer is typically used by families applying for mid-year transfers, boarding school gap-year admissions, or students who need extra preparation time before their target deadline.

Why Does the Limit Exist?

The one-per-season rule exists to:

• Prevent students from taking the test repeatedly to memorize questions
• Ensure the test remains a fair assessment for all applicants
• Maintain the integrity of the scoring norm groups

This is different from the SSAT, which allows multiple attempts within the same testing window.

Which Score Do Schools See?

When you register for the ISEE, you choose which schools receive your score report. Schools will see the scores from each test you send them — you cannot hide a lower score from an earlier attempt if you already sent it.

This is an important reason to be strategic about when you take the test:

• Don't take the ISEE "just to see what happens" if scores are automatically sent to your target schools
• If you plan to retest, consider sending the first score only to less competitive schools
• Check each school's policy — some schools will consider the higher score, others look at all attempts

Do ISEE Scores Expire?

ISEE scores don't "expire" in a strict sense, but they are tied to a specific admissions cycle. Each score report reflects the testing year in which it was taken, and schools generally expect scores from the current application cycle rather than a previous year's attempt.

In practice, this means:

• A score from last year's Fall season typically cannot be used for this year's applications — most schools require a current-year ISEE score
• If your child is reapplying to schools after a gap year or a prior unsuccessful cycle, they will need to retake the ISEE for the new application year
• Some schools may make exceptions for extenuating circumstances, but this is decided school-by-school, not by the ERB (the organization that administers the ISEE)

If you're unsure whether a school will accept an older score, contact the admissions office directly before assuming you can skip testing for the current cycle.

Is Retesting Worth It?

Retesting makes sense when:

• Your child's first attempt was significantly below their practice test scores (a bad test day)
• You can identify specific, fixable weaknesses to address before the next attempt
• There's enough time — at least 6–8 weeks of focused preparation between tests
• Your application deadlines allow for a later testing season

Retesting may not help if:

• First-attempt scores already match practice test performance (the score may be accurate)
• There isn't enough time for meaningful improvement before the next test
• Test anxiety was the primary issue — in that case, anxiety management strategies may be more effective than more content prep

How ISEE Retake Scores Compare to First Attempts

Parents often ask how much improvement is realistic on a second attempt. Based on typical patterns among students who prepare specifically for a retake, most see a gain of 1 to 3 stanine points between their first and second ISEE attempts.

The size of the improvement usually depends on a few factors:

• How specific the preparation is. Students who review their score report and target their exact weak areas improve more than students who simply "study more" generally.
• How much time passes between attempts. Six to eight weeks of focused practice tends to produce more durable gains than a shorter gap.
• Whether the first attempt was affected by outside factors. Test anxiety, fatigue, or an unfamiliar test environment on the first try often means the retake score is a more accurate reflection of ability once those factors are addressed.

The biggest gains tend to come from students who use their first score report as a diagnostic tool — pinpointing exactly which question types cost them points — rather than simply redoing broad review. A diagnostic assessment can help confirm which skills most need attention before the next test date.

How to Prepare for a Retake

If your child is retaking the ISEE:

1. Review the score report carefully. Identify which sections and question types had the lowest scores.
2. Focus preparation on weak areas. Use topic-based practice to target specific skills rather than repeating general review.
3. Take at least 2 full practice tests under timed conditions before the retake.
4. Address test-day factors. Was your child tired, anxious, or rushing? Build strategies for pacing and stress management.

Most students see meaningful improvement with 6–8 weeks of focused, targeted practice between attempts.

Can You Register for Multiple Seasons in Advance?

Yes. Families can register for future testing seasons ahead of time directly through erb.org, which manages ISEE registration and scheduling. This is useful if you already know your child may need a retake and want to lock in a test date before seats fill up at a popular test center.

A few things to keep in mind:

• You can register for more than one season in advance, but you can still only complete one test per season — registering early doesn't let you test twice within the same window
• Test center availability can be limited, especially at popular schools that host public testing, so registering early is worth doing if you anticipate a retake
• You can typically cancel or reschedule a registration if your plans change, though refund and rescheduling policies vary — check the specific terms at the time of registration

Registering for a potential retake in advance doesn't commit you to using it. If your child's first attempt goes well, you can simply choose not to test again.

Planning Your Testing Timeline

For most families applying to schools with January/February deadlines, here's a recommended approach:

• First attempt in fall (September–November) — gives time for a potential retake
• Retake in winter (December–January) if needed — scores still arrive before most deadlines
• Use spring/summer only for students who are applying for the following year or need additional preparation time

Start your preparation early. A diagnostic test taken months before the actual ISEE gives you the clearest picture of how much preparation time your child needs. See our complete preparation guide for a detailed timeline.

Frequently Asked Questions

Can you take the ISEE more than once? Yes, up to three times per year — once per testing season (Fall, Winter, Spring/Summer).

How long do you have to wait between ISEE attempts? You must wait until the next testing season. Seasons change roughly every 4 months.

Do private schools see all ISEE scores? Schools only see scores you send them. However, you choose recipients at registration, so plan carefully.

Is it worth retaking the ISEE? If your child scored significantly below their practice test level and you can dedicate 6-8 weeks of focused prep, retaking often leads to meaningful improvement.

How many times can you take the ISEE in one year? Three times — once in the Fall season (Aug-Nov), once in Winter (Dec-Mar), and once in Spring/Summer (Apr-Jul).