What is the Mensa IQ test? Admission requirements, fees, and accepted scores

The Mensa IQ test, formally called the Mensa Admission Test, is a proctored exam used to determine whether an applicant scores in the top 2 percent of the general population, the threshold for Mensa membership. In the United States, American Mensa offers the test through local volunteer proctors for $60 or at private testing facilities for $99, and the session takes between one and two hours. There is a second route to membership that many people overlook: nearly two-thirds of members qualify by submitting scores from a prior standardized intelligence test instead of sitting for the Mensa exam. This article explains how the admission test works, what the top 2 percent criterion actually means, which prior tests Mensa accepts, and where the official practice test fits in.

Mensa is a high-IQ society founded in England on October 1, 1946, by Roland Berrill and Lancelot Ware, and Mensa International reports a worldwide community of around 150,000 members today. The American branch, established in 1960, handles its own admission testing. If you are comparing Mensa with similar organizations, our overview of high-IQ societies such as Mensa, Intertel, and the Triple Nine Society covers the broader landscape; this article focuses on the test itself.

According to American Mensa, candidates in the United States have two options for taking the Mensa Admission Test.

• Local group testing ($60): sessions run by trained volunteer proctors from Mensa's local chapters. American Mensa describes this as the cost-effective option, with flexible rescheduling.

• Private testing ($99): sessions administered electronically at more than 400 approved testing facilities nationwide, with results returned within days.

The test takes between one and two hours, and candidates must bring a photo ID with proof of date of birth. Prices are current as of this writing, and American Mensa runs periodic promotional discounts on both options.

One detail surprises many test takers. American Mensa states that the admission test is given for the purpose of admission only, and it does not provide a detailed score report, a "percentile rank" (the percentage of people you scored above), or an IQ number. The organization explains that Texas psychology board regulations prevent it from releasing scores without a full professional interpretation. You learn whether you qualified, and nothing more. If you want an actual IQ score with a full breakdown, you will need a different test, a point we return to at the end.

Mensa International states the criterion plainly: membership requires a score in the upper two percent of the general population on an approved intelligence test that was properly administered and supervised. On the familiar IQ scale with a mean of 100 and a "standard deviation" (a measure of how spread out scores are) of 15, the top 2 percent begins at roughly IQ 130. Our guide to IQ percentiles walks through how a score converts to a rank against the general population.

The exact qualifying number depends on the test, because different tests use different scales. American Mensa's qualifying-score list shows a cutoff of 130 on the current Wechsler and Stanford-Binet 5 scales, 132 on several older tests, and 148 on the Cattell scale, which stretches its scores across a wider range. All of these numbers mark the same underlying standard, the 98th percentile.

It is worth being honest about what a single cutoff can and cannot do. Every IQ test carries measurement error, so a person whose true ability sits near the boundary might qualify on one attempt and miss on another. Mensa's criterion identifies a score, obtained on a particular day, that landed at or above the 98th percentile. That is a meaningful and rare result, but it is a property of the score, and scores are estimates.

The admission test is optional in a way many applicants do not realize. American Mensa reports that nearly two-thirds of its members join by submitting evidence of prior testing, and that it accepts scores from approximately 150 different standardized intelligence tests. Many people qualify with a test they took years ago in school, in a psychologist's office, or in the military. Commonly accepted examples from the published qualifying-score list include:

• Individually administered IQ tests: a Full Scale IQ of 130 on the Wechsler scales, including the WAIS for adults and the WISC for children, with the full battery of subtests required; 130 on the Stanford-Binet 5; 130 on the Reynolds Intellectual Assessment Scales.

• School-administered group tests: a composite score of 132 on the CogAT, 132 on the OLSAT, 132 on the Woodcock-Johnson cognitive battery (131 on the fourth edition), and a total raw score of 148 across Raven's Standard Plus and Advanced Progressive Matrices.

• Older college and military tests: an SAT of 1250 taken between late 1974 and January 1994, an ACT composite of 29 taken before September 1989, and several pre-1980 military tests such as the AFQT at the 98th percentile. American Mensa notes that recent SAT, ACT, and GRE scores are no longer accepted because those tests no longer correlate well enough with IQ tests.

Documentation standards are strict. Scores must come from a test administered and supervised by a neutral, qualified third party, submitted as originals or notarized copies, and psychologist reports must carry letterhead, a signature, and a license number. American Mensa states directly that it does not accept unsupervised testing, specifically including unsupervised internet-based tests, as proof of eligibility. Every submission is appraised individually, and Mensa reserves the final decision. For a step-by-step walkthrough of the paperwork and process, see our article on how to join Mensa.

American Mensa sells an official online practice test that takes about 30 minutes. The organization describes it as "a strong indication of your likelihood for success" on the real admission test, and it is a reasonable, low-stakes way to calibrate expectations before paying for a proctored session. Three limitations matter.

• It cannot qualify you: the practice test does not count toward membership and cannot be submitted as prior evidence, no matter how well you score.

• It is scored only for ages 14 and up: younger test takers will not receive results.

• It requires a U.S. address: applicants elsewhere are directed to their national Mensa organization for pre-testing options.

Unofficial "Mensa-style" quizzes circulating online are a different matter entirely; most have no published norms and predict nothing. Our guide to where to take the Mensa practice test covers the official options and how to interpret a practice result.

American Mensa does not offer its admission test to anyone under age 14. Younger children can still join: the organization encourages families to submit qualifying scores from testing done through a school or a clinical psychologist under its gifted youth admission process.

Retesting is limited. A candidate may take a test or test battery once every eight weeks, and once the available admission test batteries are exhausted, the remaining path is prior evidence from an accepted external test. This makes preparation and test-day condition worth taking seriously, since attempts are not unlimited. Membership itself, once you qualify, costs $107 per year in American Mensa dues as of this writing, with family and multi-year discounts.

The Mensa Admission Test answers exactly one question: did you reach the 98th percentile? It will not tell you your IQ. If you want an actual score with meaningful detail, a full-scale IQ test is the better tool. The RIOT IQ test (the Reasoning and Intelligence Online Test), developed by RIOT IQ with psychometrician Dr. Russell T. Warne, measures adult IQ across 15 subtests spanning six cognitive indices: verbal reasoning, fluid reasoning, spatial ability, working memory, processing speed, and reaction time. It takes about 52 minutes and reports scores on the standard mean-100, standard-deviation-15 scale, with the index-level detail that Mensa's pass/fail letter leaves out. Because it is taken online without a proctor, it does not qualify you for Mensa admission, and it does not replace an individually administered diagnostic evaluation. As a way to learn where you actually stand before deciding whether a Mensa session is worth the fee, you can take the RIOT IQ test online.

You need a score at or above the 98th percentile of the general population, meaning you outscored 98 percent of people. On tests scored with a mean of 100 and a standard deviation of 15, that corresponds to roughly IQ 130.

As of this writing, American Mensa charges $60 for sessions proctored by local group volunteers and $99 for private testing at approved facilities. Promotional discounts appear periodically, and annual membership dues after qualifying are $107.

No. All qualifying tests must be supervised, and American Mensa explicitly rejects unsupervised internet-based testing as evidence. Even the private testing option, though administered electronically, takes place at an approved testing facility.

No. The official practice test estimates your likelihood of passing the admission test, and American Mensa states it cannot be used as qualifying evidence.

No. Mensa only accepts supervised, proctored testing, so no online IQ test taken at home qualifies, including the RIOT IQ test. The RIOT IQ test serves a different purpose: giving you a normed, full-scale IQ score with subtest detail rather than a pass/fail admission decision.

American Mensa allows candidates to take a test or test battery once every eight weeks. After exhausting the available test batteries, applicants who have not qualified are encouraged to submit prior evidence from the roughly 150 accepted external tests.

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5. American Mensa. (2026). How to join Mensa.. us.mensa.org

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7. Mensa International. (2026). The history of Mensa.. mensa.org

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