When Should My Child Take the ISEE? Timing Your Test Date

Understanding ISEE Testing Seasons

The ISEE is offered during three testing seasons each year, and your child can take it once per season — up to three times per year. Since most application deadlines fall in January or February, the fall and winter seasons are the two that matter most for admissions.

Most private school application deadlines fall in January or February, which means the fall or early winter testing windows are the most popular.

When to Start Preparing

Your prep timeline should work backward from your chosen test date:

• 6+ months before: Take a diagnostic test to find strengths and weaknesses
• 3–6 months before: Focused practice on weak areas, vocabulary building, timed drills
• 1–3 months before: Full-length practice tests, pacing strategies, review mistakes
• Final week: Light review, logistics prep, rest

If your target schools have January deadlines, a November or December test date gives time for score reports to arrive. Score reports are typically available online within 7–10 business days.

Fall vs. Winter: Which Season?

Fall testing (August–November) is ideal if your child:

• Is already scoring well in practice and just needs to formalize the result
• Wants extra time in case a retest is needed in the winter season
• Is applying to schools with early notification programs

Winter testing (December–March) works better if your child:

• Needs more preparation time
• Is in 8th grade and can benefit from the first few months of new coursework
• Is applying to schools with standard January/February deadlines

The Two-Attempt Strategy: Fall + Winter

Many families don't realize that taking the ISEE twice — once in fall and once in winter — is one of the most effective testing strategies available. Here's why:

• You choose which scores to send. After viewing your child's scores, you can add recipient schools — so if the second attempt goes better, send only that report. Important: do not list your target schools as score recipients when registering for the fall attempt. Schools designated at registration receive scores automatically, and you cannot remove them after the test. Keep your recipient list empty for the first attempt; add schools only after you decide which score to send.
• The fall attempt doubles as a real diagnostic. No practice test perfectly replicates the pressure and format of the real ISEE. A fall attempt gives your child a genuine test-day experience and a real score report that pinpoints exactly where to improve.
• Targeted prep between attempts makes the difference. Students who use their fall score report to identify specific weak areas — and then focus practice on those areas for 6–8 weeks — often see meaningful improvement on the winter retest. Note that each score report is sent as a complete package; you cannot mix section scores from different test dates.

A typical timeline for this approach:

1. Summer: Begin general ISEE prep and take a diagnostic test
2. October/November: Take the ISEE for the first time (fall season)
3. November–December: Review the score report, focus practice on weak areas
4. December/January: Take the ISEE a second time (winter season)
5. Send the higher score to your target schools before application deadlines

This strategy works for most families applying to schools with January or February deadlines. The main trade-offs are the additional registration fee and the preparation time between attempts — but for many families, the potential score improvement and peace of mind make it worthwhile.

How to Register

Registration is done through the ERB website. Key steps:

1. Create an ERB family account
2. Choose a testing location (school-based or Prometric center)
3. Select your preferred test date
4. Pay the registration fee (currently around $130–$160)

Registration often fills up, especially for popular testing locations. Register at least 4–6 weeks before your preferred date.

Test Day Logistics

On test day, your child will need:

• Two #2 pencils (for paper-based testing; some locations offer computer-based testing)
• A valid photo ID (school ID works for most locations)
• A snack and water for the break
• No calculators, phones, or smartwatches

The test takes about 2 hours and 50 minutes including the essay. Plan for roughly 3.5 hours total with check-in and breaks.

What If My Child Needs to Retest?

If your child tests in the fall and wants to try again, the next opportunity is the winter season. As long as you didn't designate your target schools as score recipients for the first attempt, you can choose to send only the better score.

Before retesting, use the intervening weeks productively:

• Review the score report to identify weak sections
• Focus practice on the lowest-scoring areas using section-specific practice
• Take at least 2–3 full-length practice tests under timed conditions

Most students see meaningful improvement with 6–8 weeks of focused preparation between attempts. For a detailed timeline, see our complete preparation guide.