One previews the ACT, the other previews the SAT — and only one of them can qualify you for National Merit. Here is how they compare, and why taking both is often the smartest move.
The PreACT and the PSAT sit in the same slot on the high school calendar — school-administered practice tests taken before the exams that actually count — which is exactly why they get confused. But they are made by different organizations, mirror different flagship tests, and carry different stakes. This guide puts them side by side so you can decide which to take, or whether to take both.
The PreACT (from ACT) previews the ACT; the PSAT (from the College Board) previews the SAT. Colleges don't use either score for admission, and each is a genuinely useful diagnostic — but they are not interchangeable, because the PSAT/NMSQT is also the sole gateway to the National Merit Scholarship Program, while the PreACT has no scholarship program attached. Since both are school-day tests your school orders, availability often decides for you. When you do have a choice, the best answer for many students is both: each score comes with a prediction for its flagship test, and comparing the two predictions is the most reliable early input for the SAT-vs-ACT decision.
The table below compares the PreACT (grades 9–10) with the PSAT/NMSQT and PSAT 10, the closest counterparts. (Each family also has a younger sibling — the PreACT 8/9 on a 1–30 scale and the PSAT 8/9 on a 240–1440 scale — and states and districts can order two online-only versions: PreACT 9 Secure for 9th graders, scored 1–32, and PreACT Secure for 10th graders, scored 1–35.)
| Feature | PreACT | PSAT (NMSQT / PSAT 10) |
|---|---|---|
| Made by | ACT | College Board |
| Previews | The ACT (scored 1–36) | The SAT (scored 400–1600) |
| Grades | 9–10 (PreACT 8/9: grades 8–9) | PSAT 10: grade 10; PSAT/NMSQT: grades 10–11 (8/9 version: grades 8–9) |
| Score scale | 1–35 composite (8/9 version: 1–30) | 320–1520 (8/9 version: 240–1440) |
| Sections | English, Math, Reading; Science if the school or district gives it | Reading & Writing, Math |
| Length | 117 questions, 120 min (153 questions, 160 min with Science) | ~2h 14m |
| Delivery | Paper or online at school (the Secure versions are online only) | Digital & adaptive via the Bluebook app |
| Science section | Optional — the school or district decides; not part of the Composite | No |
| National Merit | No — no scholarship program attached | Yes — PSAT/NMSQT only, junior year |
| Who administers | Schools, on a school day they choose (early September – late May) | Schools, on dates within College Board windows |
| Used for college admission? | No (paper testers can opt in to share profile information with colleges) | No |
Structurally, the contrast mirrors the flagship tests themselves: the PreACT is a faster-paced test with three core sections and optional Science, given on paper or online; the PSAT is a digital, adaptive two-section test with more time per question. That difference in feel is not a bug — it is the whole point of taking a preview.
This is the single asymmetry that can make the choice for you. The National Merit Scholarship Program identifies its scholars exclusively through the PSAT/NMSQT taken in junior year. Not the PSAT 10, not the PSAT 8/9 — and not the PreACT, which has no scholarship program attached to it at all. A perfect 35 on the PreACT carries zero scholarship weight; the PreACT's value is entirely diagnostic.
The practical rule: if there is any realistic chance you are in National Merit territory, the junior-year PSAT/NMSQT belongs on your calendar regardless of whether you ultimately prefer the ACT. Plenty of students take the PSAT/NMSQT for the scholarship pathway and still choose the ACT as their admissions test — the two decisions are independent. Which PSAT fits which grade (8/9, 10, or NMSQT) is its own question, covered in which PSAT to take.
Beyond scholarships, the deep difference is predictive. Each practice test is fully aligned with its flagship: the PreACT report includes a predicted ACT score range, and a PSAT score reads directly against the SAT's scale. That makes each one a low-stakes dress rehearsal for a different test day — the PreACT for the ACT's English, Math and Reading pacing (plus Science, if your school gives it), the PSAT for the SAT's digital, adaptive, two-section structure.
Most students eventually concentrate on one flagship test, and the smart way to pick is with evidence rather than vibes. A PreACT score projects your ACT; a PSAT score projects your SAT; put the projections on a common footing and you can see which test flatters your skills. The SAT vs ACT guide walks through the stylistic differences in depth — pacing, science reasoning, adaptive modules, calculator policy — and the practice tests let you feel those differences firsthand before committing prep hours.
Because the two families use unrelated scales, comparison requires conversion. Use the PreACT to ACT converter to turn a PreACT composite into an ACT projection, and the PSAT to SAT converter to do the same on the College Board side. With both projections in hand, the stronger relative result usually points at your test.
Take it. Both tests are school-ordered and school-administered — there are no national test dates you can register for independently — so the test in front of you is the test you take. Either one delivers a real diagnostic, and its conclusions transfer: strong reading on the PreACT predicts strong reading on the SAT too. The one caveat is junior year: if your school skips the PSAT/NMSQT and National Merit matters to you, ask your counselor early about arranging to test at a nearby school.
If your school or district gives PreACT Science, the PreACT is the more revealing test for you, because it is the only one of the two with a Science section — the PSAT has none. A strong PreACT Science score (and the STEM score on the report) is evidence that the ACT can showcase a strength the SAT doesn't measure. Note the wrinkle: since fall 2026 the PreACT Composite is computed from English, Math and Reading, with Science optional and scored separately, mirroring the enhanced ACT.
The PSAT's structure — fewer sections, more time per question, adaptive difficulty — resembles the SAT's, which tends to suit deliberate workers. If timed pace is your main worry, a PSAT sitting will tell you whether the SAT's rhythm fits better than the ACT's sprint.
The PSAT/NMSQT in junior year is mandatory for you — it is the only route in. Take the PreACT too if offered; it costs you nothing strategically and adds an ACT data point.
That is precisely the situation both tests were built for. Take whichever comes first on your school's calendar, and if both are offered, take both. The next section shows how to read the pair.
If you end up with one of each score report, you are holding the best cheap experiment in test prep. Here is how to run it.
Step 1 — project both to their flagships. Use the predicted ACT range on your PreACT report (or the PreACT to ACT converter) and the PSAT to SAT converter to get an ACT projection and an SAT projection. Step 2 — compare percentiles, not raw numbers. A 1–35 composite and a 320–1520 score cannot be compared directly; each report's national percentile puts them on common footing. A clearly higher percentile on one test is a real signal. Step 3 — weigh the experience. Which format left you more composed — the PreACT's fast, fixed pace or the PSAT's adaptive modules? Comfort compounds over a full prep cycle. Step 4 — commit. Once the evidence points one way, concentrate your prep on that flagship test rather than splitting hours across both.
Both families offer grade-banded versions, so a natural sequence exists whichever side you lean toward — and the two sequences interleave cleanly if you take tests from both.
| Grade | PreACT Side | PSAT Side |
|---|---|---|
| 8th | PreACT 8/9 (1–30) if offered | PSAT 8/9 (240–1440) if offered |
| 9th | PreACT 8/9 or PreACT (1–35); PreACT 9 Secure (1–32) in some states and districts | PSAT 8/9 |
| 10th | PreACT or PreACT Secure (1–35) — the key ACT predictor | PSAT 10 (320–1520, no National Merit); some schools offer the PSAT/NMSQT for practice |
| 11th | First real ACT sittings | PSAT/NMSQT in October — the National Merit qualifier — then SAT sittings |
| 12th | ACT retakes as needed | SAT retakes as needed |
The load-bearing moments are 10th and 11th grade: a 10th-grade PreACT and/or PSAT 10 produce the projections that drive your flagship-test choice, and October of junior year is the one-shot PSAT/NMSQT. Everything earlier is low-stakes familiarity building — valuable, but nothing to over-engineer.