TACHS Exam: What It Is, Why It Matters, and How to Actually Prepare for It

There’s a specific kind of quiet dread that settles over New York families every September when their kid is in eighth grade. Not because the school year is starting—that’s manageable. It’s the test. The TACHS: the one acronym that can shift the whole trajectory of where your child spends the next four years.

If you haven’t looked into it yet, here’s the short version: the Test for Admission into Catholic High Schools is the single standardized exam used by the Archdiocese of New York and the Diocese of Brooklyn and Queens to evaluate applicants for their secondary schools. Most kids sit it once, in late October or early November, and that’s it. One morning. One shot.

So yeah—it matters.

What’s Actually on the Exam

The TACHS runs for roughly two and a half hours and is divided into four sections: Reading, Written Expression, Mathematics, and something called Ability. That last one is where a lot of students get tripped up, because it isn’t really about school subjects at all. It’s pattern recognition, logical reasoning, spatial thinking—the kind of stuff that’s harder to Google your way through the night before.

Scores come back as percentile rankings. There’s no pass or fail line on the score report itself—what matters is how your child ranks against every other student who took the test that year. Somewhere in the top 20 to 25 percentile tends to be what the more competitive schools are looking at, though each institution has its own criteria, and none of them are exactly forthcoming about the specifics.

Preparation That Actually Works

Here’s something that gets glossed over in a lot of the advice floating around parenting forums: not all TACHS preparation is created equal. Reviewing class notes or doing general math revision helps, but it doesn’t replicate the experience of sitting a timed, full-length exam under pressure. That experience has to be practiced deliberately.

The most useful thing most families can do early in the process is have their child work through a proper TACHS practice test—something that mirrors the real format closely enough that the actual test day doesn’t feel alien. Knowing how questions are phrased, how much time you have per section, and where you consistently lose marks is information you can do something with. Vague revision isn’t.

Most specialists in this space suggest starting eight to ten weeks before the exam date. That’s enough time to run a proper diagnostic, identify gaps, work on them without burning out, and then do a round of full-timed rehearsals in the final stretch.

Something worth noting about the Ability section specifically: cramming doesn’t really work here. Short, consistent exposure to logic puzzles, pattern exercises, and reasoning tasks over several weeks tends to produce better results than throwing two hours at it the Sunday before the test. Think of it less like studying and more like training.

Timing and Registration

Registration opens in September and closes quickly—sometimes within a few weeks. Families register through the official TACHS website, where you’ll also find the year’s test date, available centers, and information about accommodations for students with documented learning needs. If that applies to your child, start the process early. The paperwork takes time, and the window to request it doesn’t stay open long.

A Note on the Pressure

It’s worth saying plainly: this exam gets blown up into something enormous by a lot of parents, and that pressure lands squarely on twelve- and thirteen-year-olds who are already dealing with a heavy school year. Some of them internalize it. Some of them shut down completely.

The kids who tend to do best aren’t necessarily the ones who worked the hardest in the final week. They’re usually the ones who started early enough that TACHS exam prep just became a normal Tuesday evening thing—not a crisis. Consistency over intensity, almost always.

Give your child enough time with realistic practice tests for the TACHS, limit the drama around results, and trust that the preparation will show up when it counts.

That’s genuinely all there is to it.