To get an official IQ test, you need to be evaluated by a licensed psychologist or trained professional using a standardized intelligence test like the Wechsler scales or the Stanford-Binet. Online IQ tests don’t count. An official assessment typically costs $300 to $1,500 through a private practice, though university clinics and community health centers often charge less.
What Counts as an “Official” IQ Test
An official IQ score comes from a standardized test administered one-on-one by a qualified professional in a controlled setting. The test must have established norms, meaning it was calibrated on a large population so your score reflects where you fall relative to everyone else. The average IQ is 100, with a standard deviation of 15 on most tests, so a score of 115 puts you roughly in the top 16% of the population.
The most widely used tests for adults are the Wechsler Adult Intelligence Scale (currently in its fourth edition, known as the WAIS-IV) and the Stanford-Binet 5, which covers ages 2 through 85+. For children, the Wechsler Intelligence Scale for Children (WISC-V) covers ages 6 through 16, while the Kaufman Assessment Battery for Children (KABC-II) covers ages 3 through 18. Other respected instruments include the Woodcock-Johnson Tests of Cognitive Abilities (for ages 2 and up) and the Reynolds Intellectual Assessment Scales (ages 3 through 94).
These tests measure multiple cognitive domains: verbal reasoning, working memory, processing speed, visual-spatial skills, and fluid reasoning. You’ll receive a full-scale IQ score along with subscores in each area, which is far more informative than a single number. The entire process usually takes one to three hours of face-to-face testing, plus additional time for scoring, interpretation, and writing a formal report.
Who Can Administer the Test
Licensed clinical psychologists are the most common providers. To earn that license, a psychologist must hold a doctoral degree in psychology from an accredited program, complete two years of supervised clinical experience (3,500 hours total), and pass the Examination for Professional Practice in Psychology. Neuropsychologists, who specialize in brain-behavior relationships, also administer these tests regularly.
Some advanced nurse practitioners and physician assistants with specialized training in psychological assessment can administer and score tests as well. School psychologists routinely conduct IQ testing for children as part of special education evaluations, though those results may be limited to educational use.
The key requirement is that the person giving the test is trained on that specific instrument, is licensed or supervised by someone who is, and administers it under standardized conditions. If you need the score for any formal purpose, whether that’s a disability evaluation, gifted program admission, or high-IQ society membership, the test must be given in person by a neutral, qualified professional. No organization accepts scores from unsupervised or internet-based tests.
Where to Get Tested
Private psychology practices are the most straightforward option. Search for a licensed psychologist or neuropsychologist in your area who offers cognitive or psychoeducational testing. Many list this service on their website. You’ll typically schedule an intake appointment, complete the testing in one or two sessions, and receive a written report within a few weeks.
University psychology clinics affiliated with doctoral training programs offer assessments at reduced rates. Graduate students conduct the testing under direct supervision of licensed faculty. The quality of the assessment is comparable to private practice, but wait times can be longer, sometimes several weeks to a few months, because these clinics serve as training sites.
Community mental health centers and nonprofit organizations sometimes provide cognitive testing on a sliding-scale basis, adjusting fees to your income. Availability varies, and these centers may prioritize clients with clinical needs over people seeking IQ scores out of curiosity.
School districts provide IQ testing for children at no cost when it’s part of a special education evaluation. If you suspect your child has a learning disability or qualifies for a gifted program, you can request an evaluation through the school. The district is required to respond to that request, though the process and timeline depend on local policies.
What It Costs
A private cognitive assessment runs $300 to $1,500. The range depends on where you live (urban areas cost more), the provider’s credentials, and how comprehensive the evaluation is. A straightforward IQ-only assessment on the shorter end might be a single session and a brief report. A full neuropsychological evaluation that includes IQ testing alongside memory, attention, and executive function measures will land at the higher end and may span multiple sessions.
Health insurance sometimes covers the cost, but only when the testing is medically necessary. Insurers and Medicare cover psychological and neuropsychological testing when it’s needed to diagnose or manage a suspected mental health condition or neurological issue. Examples include distinguishing early dementia from normal aging, evaluating cognitive effects of a brain injury, or assessing the impact of chemotherapy on thinking. Insurance does not cover IQ testing done purely for personal curiosity or society membership. If your doctor refers you for cognitive testing as part of a clinical workup, call your insurer first to confirm coverage and ask whether prior authorization is required.
For lower-cost options, university clinics typically charge $100 to $400. Some private practitioners offer sliding-scale fees if you ask. If you’re pursuing Mensa membership specifically, American Mensa offers its own supervised admission test at a fraction of the cost of a full private evaluation.
The Testing Process Step by Step
First, find a provider and schedule an appointment. If you’re looking for a psychologist who does testing, search for “psychological testing” or “cognitive assessment” along with your city. Your primary care doctor can also provide a referral. When you call, ask what test they use, how long the evaluation takes, and what the fee includes (some bundle the written report, others charge separately for it).
At your first visit, the psychologist may conduct a brief clinical interview to understand why you’re seeking testing and gather relevant background information, including medical history, educational history, and any concerns about learning or cognition. The actual IQ test follows, either in the same session or a separate one. You’ll sit across from the examiner and work through a series of tasks: defining words, solving visual puzzles, repeating number sequences, identifying patterns, and answering reasoning questions. There are no tricks, and you can’t study for it in any meaningful way.
After testing, the psychologist scores the assessment, interprets the results, and writes a formal report. This report includes your full-scale IQ, index scores for each cognitive domain, percentile rankings, and a narrative interpretation. Most providers schedule a feedback session to walk you through the findings. From start to finish, expect the process to take two to four weeks, with most of that time spent waiting for the report.
If You Want to Join Mensa
American Mensa requires a score at or above the 98th percentile on an accepted intelligence test. On the Wechsler scales, that’s a full-scale IQ of 130. On the Stanford-Binet 5, it’s also 130. On older Stanford-Binet editions and many other tests, the cutoff is 132 because of differences in how those tests are normed.
Mensa accepts scores from roughly 200 standardized tests, so you may already qualify from a test you took years ago. School-administered tests like the Cognitive Abilities Test (CogAT) qualify with a composite score of 132. The Differential Ability Scales and Woodcock-Johnson also appear on the accepted list. Even certain older college entrance exams count: an SAT score of 1250 or above taken before January 1994, or an ACT composite of 29 or above taken before September 1989.
If you don’t have a prior qualifying score, you can take the Mensa Admission Test, which is offered at supervised sessions around the country. You can also submit scores from a private psychologist’s evaluation. Mensa does not accept any unsupervised test, including anything taken online.
Nonverbal IQ Tests
Standard IQ tests rely heavily on language, which can disadvantage people who are deaf or hard of hearing, who have speech or language disorders, or who are not native English speakers. Nonverbal intelligence tests address this by measuring reasoning through visual and spatial tasks that require minimal or no verbal instruction.
The most commonly used nonverbal tests include the Leiter International Performance Scale (Leiter-3, ages 3 to 75), the Wechsler Nonverbal Scales of Ability (ages 4 to 21), and the Universal Nonverbal Intelligence Test (UNIT-2, ages 5 to 21). The Comprehensive Test of Nonverbal Intelligence (CTONI-2) covers ages 6 through 89. If you or your child would be better served by a nonverbal assessment, ask the psychologist about these options when scheduling.
Getting Records of Past Testing
If you were tested as a child, whether through your school district or a private psychologist, those records may still exist. School districts typically retain special education records for several years after a student leaves the district, though retention policies vary. Contact the district’s special education office and request copies. For private evaluations, reach out to the psychologist’s practice, keeping in mind that very old records may have been destroyed per retention schedules. If you’re trying to use a past score for Mensa or another purpose, you’ll generally need the original report or a certified copy showing the test name, edition, score, date, and administrator.