The cost of a lie detector test depends on a number of factors. For example, the type of test you choose will affect its accuracy. Moreover, the cost may also be affected by how many questions you need to answer.

Ensure that the examiner you hire is licensed. You should also ask if they have completed any polygraph training programs.


Because of their sensitive nature, and the fact that they can have a major impact on someone’s life, lie detector tests aren’t cheap. It’s important to do your research and find a reputable examiner. Look for one who is a member of the American Polygraph Association (APA) or similar professional organization.

Depending on the location, you can expect to pay anywhere from $200 to $2,000. The price will increase with the length of the test. Holland Polygraph Services in western Washington state, for example, starts testing at $400 for a two-hour test.

Home lie detectors are also available for a fraction of the cost, though they’re not considered very reliable. You can buy a De-FIB-ulator voice-stress test for around $100, or an older model on eBay for $720. People with certain medical conditions may not be able to take the test, including psychopaths, diagnosed sociopaths, and those with epilepsy or nerve damage. These conditions can skew the results and make them less accurate.I recommend this website for more Lie Detector Test.

Type of test

The cost of a lie detector test can vary depending on the type of test and the examiner. Standard tests use sensors to measure changes in heart rate, blood pressure, breathing rate, and sweat gland activity. The test is administered by a trained examiner who asks a series of neutral control questions and then a set of relevant questions. The test is considered valid if the subject’s physiological responses to the relevant questions are larger than those during the control question sequence.

In addition to the cost of a test, a professional polygraph service may charge for the examiner’s travel expenses and hotel accommodations. The cost of a test also depends on the duration and number of questions asked. A two-hour test costs more than one that lasts for an entire day. In addition, the results of a polygraph test must be analyzed by an examiner before they can be used as evidence in court.


The examiner is a crucial factor that can significantly affect the cost of a polygraph test. The examiner needs to understand the nuances of lying and be able to identify nonverbal cues that may be indicators of deception. The examiner also needs to be knowledgeable about the equipment used for the test and how to interpret the results.

The length and complexity of the test can also affect the price. A more complex test will be more expensive than a shorter test. Additionally, a test related to a criminal or civil matter will be more expensive than a test that is purely private.

While a polygraph test can be useful in certain situations, it should always be weighed against other options that are more affordable and less invasive. For example, home lie detectors can be purchased for between $90 and $700. However, these tests are considered to be much less reliable and only offer 65% accuracy.


Lie detector tests are useful tools in a variety of situations. They can help in criminal investigations, legal disputes and even employment screening. But they are not cheap. They can cost several thousand dollars or more. The cost varies depending on the type of test, service provider and location. Some providers offer package deals and contracts to reduce the cost.

It is important to choose a professional polygraph examiner and a reliable agency. If possible, make sure they have a strong track record and are accredited by the APA (or similar organisation). It is also worth checking whether the examiner’s reports have been peer reviewed.

Be wary of websites offering polygraph tests for cheap. These tests may be cheaper than a real polygraph, but they are not accurate and are likely to be of little use in a court of law. These tests typically use what are known as ‘voice stress’ tests and are not considered very reliable – according to the APA, they only have about a 65% accuracy rate.