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Lie Detector Testing Cost

How Much Does Lie Detector Testing Cost?

low costHome Voice Stress Machine: $90 average costTwo-Hour Session with Polygraphist: $200-$800
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Lie detector tests, also called polygraph tests, are used to determine whether a person is telling the truth. According to the American Polygraph Association, research has shown standard lie detector tests are 80%-98% accurate[1] . The accuracy of voice stress testing, however, is much lower, research has shown. Lie detector tests are used for a multitude of reasons including infidelity, immigration, theft, robbery, drug use, sex offender history and vandalism. The test usually measures physiological responses in blood pressure, pulse, respiration and skin conductivity.

Typical costs:

  • Lie detector tests conducted by certified professionals typically cost $200-$2,000. The length of the test plays a factor in the price, with all-day tests on the high end of the range. Typical two-hour, single-issue polygraph exams are generally $200-$800. For example, Holland Polygraph Services[2] , servicing western Washington state, starts tests at $400, but warns the price can go much higher. The Polygraph Examiner[3] , which operates in North Carolina, South Carolina and Georgia, claims most tests it administers cost $350-$600. Capitol Polygraph[4] , in Michigan, charges $325-$500 for most tests.
  • Home lie detectors are also available for about $90-$700, although the accuracy of home testing units and voice-based testers is not considered reliable. (The American Polygraph Association says research has shown about 65% accuracy[5] in voice-stress tests.) A voice-stress test called the De-FIB-ulator[6] sells for $89-$99. Older lie detector units are sold on eBay[7] , typically for about $700.
Related articles: Criminal Background Check, Private Investigator, Attorney Fees

What should be included:
  • A single-issue polygraph test typically takes about two hours to complete. During the test, four to six sensors are attached to the test-taker's body. The test begins with a pre-test interview with control questions and is followed by the actual test and collection of physiological data. The test subject is likely to be asked to lie in order to elicit a physiological response as a part of the control questions. Most tests end with an analysis which is shared with the test taker.
  • Police Link, an online police community resource, posted an article on "Taking the Mystery out of the Polygraph Test"[8] that provides an overview of what to expect during an exam.
  • The Employee Polygraph Protection Act, a federal law established in 1988, set guidelines for private employers to conduct lie detector tests. The American Polygraph Association provides an overview of the law[9] . The Department of Labor has the full text[10] of the law.
  • Polygraphists are certified through the American Polygraph Association after completing an accredited training program.[11] describes a polygraphist's necessary training and education.
  • Some professional testing services offer discounts on multiple tests on the same issue. For example, C & C Polygraph[12] , with several offices in Idaho, offers unspecified discounts on multiple tests. C & C Polygraph also offers a 20% discount to return customers. Equalizer Polygraph, serving western Washington, has a "His and Her" special, with $50 off the total cost when two partners take an infidelity related polygraph test.
Shopping for lie detector testing:
  • The American Association of Police Polygraphists offers a searchable database[13] of lie detector testing professionals.
  • The American Polygraph Association has a searchable listing[14] of its members.
  • Contrary to a popular myth, polygraph tests are admissible in court. The Polygraph Examiner provides an outline of previous cases involving polygraph admissibility[15] .
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What People Are Paying - Recent Comments
Lie dector
Amount: $1,200.00
Posted by: a user in Austin, TX.Posted: December 5th, 2017 04:12PM
Company: 358Type of Polygraph: CPS
My ex girlfriend think I am the one call CPS on her so I want to prove to her that I didn't do that to her and her kids.
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Amount: $200.00
Posted by: Kezia williams in St. Louis, MO.Posted: November 8th, 2017 08:11AM
Company: Type of Polygraph: Lie detecter
Need lie detector test to seek out truth of underhanded tactics to cause harm in my life.
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Spousal infidelity
Amount: $100.00
Posted by: Brandon Cordova in Clovis, NM.Posted: October 6th, 2017 02:10PM
Company: Type of Polygraph: infidelityloe
Me and my wife would like to take a lie detector test to determine our infidelity in our relationship as long as the truthfulness within each other
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Amount: $200.00
Posted by: a user in GRAND RAPIDS, MI.Posted: September 29th, 2017 08:09AM
Company: SelfType of Polygraph:
My boyfriend think im cheating
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Trust issue
Amount: $100.00
Posted by: 2cute in Pacoima, CA.Posted: May 27th, 2017 03:05AM
Company: Type of Polygraph: Lie and cheating
I wanna how many time he lied n cheated on me when we together
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Lie dector
Amount: $200.00
Posted by: Mike Treger in Orange, VA.Posted: May 1st, 2017 10:05AM
Company: HomeType of Polygraph: Lie dector
My wife thinks I'm always lieing to her
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trust issues
Amount: $100.00
Posted by: [email protected] in mitchell, SD.Posted: November 14th, 2016 08:11AM
Company: Type of Polygraph: Lie
How can meand my partner get the test as soon as possible and who can we go threw to get it done Asap
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Amount: $100.00
Posted by: [email protected] in Moorpark, CA.Posted: October 5th, 2016 09:10AM
Company: BoyfriendType of Polygraph: Cheating
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Amount: $500.00
Posted by: a user in Miami, FL.Posted: June 9th, 2016 10:06PM
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lie detector and family woes
Amount: $0.00
Posted by: KellyMorey in West Jordan, UT.Posted: May 13th, 2016 08:05PM
Company: personalType of Polygraph: any
I was saddened when I saw how much a test would cost. My daughters are in the midst of a very sad war. My oldest daughter has been accused of stealing $300.00 from my youngest 13 year difference). My oldest is a clepto by defined by the dictionary. She promises she is innocent and they hate one another. She said she would take a test and I am disabled, (they don't work), if you know SSec. you know they are not the best payers. I hope something stops this, it is tearing this family apart!
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Trust issues
Amount: $100.00
Posted by: Jenise Trujillo in Rio Rancho, NM.Posted: April 15th, 2016 09:04AM
Company: Type of Polygraph: Lie detector
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $100.00
Posted by: Samantha Mitchell in Miami, FL.Posted: January 1st, 2016 07:01AM
Company: Type of Polygraph: Trust issues
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Trust issues
Amount: $100.00
Posted by: selena self in PERRIS, CA.Posted: September 19th, 2015 10:09PM
Company: Type of Polygraph: Lie
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