"Just take both" is some of the most common test-prep advice out there, and it's not wrong exactly -- but it's usually said without explaining what taking both actually buys you, and what it doesn't. Both tests changed recently enough (the SAT went fully digital in 2024, the ACT rolled out a shorter "Enhanced" format in 2025) that a lot of the old folklore about which test suits which student is also out of date.

The two tests aren't structured the same way anymore

The digital SAT is fully adaptive and taken through College Board's Bluebook app: about 2 hours 14 minutes total, split into a Reading & Writing section and a Math section, each broken into two modules. How you do on the first module determines the difficulty of the second -- which is also how the test manages to be almost an hour shorter than the old paper SAT while still producing a comparable score. See our piece on exactly how that adaptive format works for the mechanics in full, or precisely how the Module 1-to-Module 2 routing works and why the ACT doesn't do this at all for a deeper look at that specific difference.

The ACT, since its 2025 "Enhanced ACT" redesign, is linear (not adaptive) and shorter than it used to be: English (50 questions, 35 minutes), Math (45 questions, 50 minutes), and Reading (36 questions, 40 minutes) are the required core, taking about 2 hours 5 minutes. Science is now fully optional -- a $4 add-on, 40 questions in 40 minutes -- and no longer factors into your composite score at all. The composite is now just the average of English, Math, and Reading. See the full breakdown of the Enhanced ACT format for the same depth of detail the digital SAT piece above gets.

The practical difference that actually matters for most students: the SAT gives you meaningfully more time per question than the ACT does, in exchange for wording that tends to be trickier to parse. The ACT is more straightforward and literal, but faster-paced.

Who tends to do better on which

  • The SAT tends to suit you if you'd rather have fewer questions with more time to think per question, and you don't mind a fully digital, adaptive interface.
  • The ACT tends to suit you if you work quickly and comfortably under time pressure, prefer direct wording over trickier phrasing, and want the option to show off data/science reasoning skills (if you opt into Science).
  • Math content differs too: the ACT covers a noticeably wider range of math -- more geometry, trigonometry, and topics like logarithms -- while the SAT's math is narrower and more algebra-heavy. If geometry/trig isn't your strength, that alone can make the SAT feel easier.

The old shorthand -- "SAT for readers, ACT for science kids" -- is weaker advice than it used to be, since Science is now optional on the ACT and the SAT's adaptive format changes the pacing experience entirely. A real, full-length, timed practice test of each (not just skimming ten questions of each) is a far better signal than any personality-based guess.

Why some students genuinely take both

  • A practice test doesn't fully replicate test day. Real proctoring, real nerves, and a real deadline change how you perform in ways a relaxed at-home practice test can undersell.
  • Insurance against a bad day. Illness, a bad night's sleep, or an anxiety spike on one test date doesn't have to be your only data point if you have a second, independently-scheduled test to fall back on.
  • Some scholarship programs specifically ask for a test score, and either one counts. For example, National Merit Scholarship semifinalists need to submit a "confirming" SAT or ACT score to advance to Finalist -- NMSC accepts either test for this, so it's not a reason you specifically need both, just a reason you need at least one.
  • You're genuinely unsure, and the cost of finding out for real is worth it to you. Some students are close enough on practice tests that only a real sitting settles it.

The myth worth retiring: there's no such thing as a cross-test superscore

A lot of "take both" advice implies you can cherry-pick your best sections from each test into one combined score. You can't -- and if you're trying to compare a score on one test to a score on the other, use the official concordance table, not a guess. Superscoring -- where a college recombines your best section scores across multiple sittings -- only works within the same test. Colleges that superscore will combine your best Math from one SAT sitting with your best Reading & Writing from another SAT sitting, or your best sections across multiple ACT sittings -- but essentially no school will take your SAT Math and your ACT English and blend them into a hybrid score. Taking both tests gets you two separate, complete scores to choose between, not one composite "best of both."

Does taking both actually improve your odds?

Here's the honest version, not the version that gets repeated to sell more test prep: most colleges state plainly that they have no preference between the SAT and the ACT, and accept either on equal footing. Submitting your single strongest score, from whichever test, satisfies the requirement everywhere either test is accepted -- there's no standard "bonus" for having sent both.

The strongest real-world case for a benefit comes from Princeton's former dean of admission, Janet Rapelye, who told the New York Times that submitting both "generally gives us a little more information" -- but even she was clear that's a minor, marginal advantage, not a deciding factor, and that submitting just one test is entirely fine if that's your stronger score.

So the honest takeaway: taking both is a legitimate diagnostic and insurance strategy -- finding your stronger test, or protecting against a bad day -- not a proven way to move the needle on your chances. If you already have a strong, representative score from one test, taking the other one "just in case" mostly adds cost, prep time, and stress without a clear return. Two mediocre scores don't outperform one strong one -- and if you do retake within the same test, know how superscoring actually works and whether retaking too many times can itself become a red flag.

What this means for you

  • Take one full-length, official, timed practice test of each -- College Board's Bluebook app for the SAT, ACT's own official practice test -- before you commit real test dates and money to either.

  • If one is clearly stronger, put your prep time and test registrations there. A single polished score beats a split effort across two average ones.

  • If your practice scores are genuinely close, or a scholarship you're targeting wants a confirming score and you want the flexibility, taking both for real once is a reasonable, defensible choice.

  • Don't assume every school treats superscoring or score-choice the same way -- check each target school's testing policy directly rather than assuming it works like the last school you researched.

  • This is one step in the larger process, not a standalone task -- see the complete step-by-step guide to applying to college for how it fits with everything else, and where you are in the sequence.

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