SAT Subject Tests were a set of multiple-choice standardized tests given by The College Board on individual topics, typically taken to improve a student's credentials for college admissions in the United States. For most of their existence, from their introduction in 1937 until 1994, the SAT Subject Tests were known as Achievement Tests, and until January 2005, they were known as SAT II: Subject Tests. They are still commonly known by these names. Unlike the Scholastic Aptitude Test (SAT) that the College Board offers, which are intended to measure general aptitude for academic studies, the Achievement Tests are intended to measure the level of knowledge and understanding in a variety of specific subjects. Like the SAT, the scores for an Achievement Test range from 200 (lowest) to 800 (highest).

Many colleges used the SAT Subject Tests for admission, course placement, and to advise students about course selection. Achievement tests were generally only required by the most selective of colleges.^[1] Some of those colleges named one or more specific Achievement Tests that they required for admission, while others allowed applicants to choose which tests to take. Students typically chose which tests to take depending upon college entrance requirements for the schools to which they planned to apply.

Fewer students took achievement tests compared to the SAT. In 1976, for instance, there were 300,000 taking one or more achievement tests, while 1.4 million took the SAT.^[2] Rates of taking the tests varied by geography; in 1974, for instance, a half of students taking the SAT in New England also took one or more achievement tests, while nationwide only a quarter did.^[3] The number of achievement tests offered varied over time.^[4][2] Subjects were dropped or added based on educational changes and demand. In the early 1990s, for instance, Asian languages were added so as not to disadvantage Asian-American students, especially on the West Coast.^[1]

On January 19, 2021, the College Board discontinued Subject Tests. This was effective immediately in the United States, and the tests were to be phased out by the following summer for international students.^[5]

There were 20 different tests in 2020, the last year in which subject tests were offered, 12 of them in foreign languages. Examinees were required to bring an acceptable calculator to take the Mathematics tests (calculators were not permitted on any other test) and a CD player to take the language with listening tests.^[6][7][8]

Every test was a one-hour timed test. Historically, the exception to the one-hour time was the writing test, which was divided into a 20-minute essay question and a 40-minute multiple-choice section. The writing test was discontinued in January 2005.

There were 17 different tests for the 1971–1972 school year:^[4][12]

Each test was scored on a scale of 200 to 800; however, on some tests, it was impossible to get a 200. For example, if someone got every question wrong on the Mathematics Level 2 test, they could receive a score of 310, depending on the test-specific curve.^[13] An exception was the ELPT, which was scored on a scale of 901 to 999. In addition, the foreign language tests that had both reading and listening components gave subscores for each in the 20 to 80 range.

Prior to the first administration of the new SAT Reasoning Test (which included the writing section) in March 2005, some highly selective colleges required applicants to take three SAT Subject Tests, including the writing test and two other tests of the applicant's choosing, in addition to the SAT. However, when writing became a standard component of the SAT Reasoning Test, most selective colleges recommended applicants submit scores for any two SAT Subject Tests. Engineering schools might recommend or require Chemistry or Physics and Math Level 2.^{[14][15][16][17][18]} No schools required three Subject Tests and Georgetown was the only remaining school to 'strongly recommend' taking three Subject Tests.^[19]

The California Institute of Technology, which previously required subject tests, no longer required or considered them as of 2020.^[20]

Schools also varied with regard to their SAT Subject Test requirements of students submitting scores for the ACT in place of the SAT: some schools considered the ACT an alternative to both the SAT and some SAT Subject Tests, whereas others accepted the ACT but required SAT Subject Tests as well. Information about a school's specific test requirements could typically be found on its official website.

In October 2002, the College Board decided to drop the "Score Choice" option for exams, due to the fact that it disproportionately benefited wealthier students taking the exam who could afford to take it multiple times. Score Choice meant that scores were not released to colleges until the student approved the score after seeing it.^[21] However, the "Score Choice" option was reinstated as of the March 2009 test, allowing test takers to again choose whether or not to send scores.^[22]

The subject tests and the optional SAT essay were discontinued on January 19, 2021, for U.S. students and in June 2021 for international students. This was done as a response to changes in college admissions due to the impact of the COVID-19 pandemic on education.^[23] The discontinuation was also due to preference for Advanced Placement courses and its exams.^[24]

• College admissions in the United States
• ACT (American College Testing)