Search thousands of topics on CostHelper

BROWSE ALL TOPICS >> babies & children  cars  consumer electronics health & personal care home & garden personal finance  pets  schools small business sports weddings
CostHelper > Personal Finance  > Employment > Lie Detector Testing

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

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] .
post Post   Comments (35)  
CostHelper News

7 Tricks To Make Home Appliances Last Longer
Give your household equipment a little workout now and then, to make sure anything mechanical will perform well when needed. Periodic exercise can extend the usable life of many items. || Posted October 14 2013

5 Important Things to Know Before a Tornado Hits
This week the Midwest has been battered by tornados, which are one of the most violent and destructive type of storms nature has in its arsenal. || Posted November 19 2013

‣ All CostHelper Blog Posts

What People Are Paying - Recent Comments

Page 2 of 2   -   << Previous   1   2   

Amount: $200.00
Posted by: Anisha wilson in Philadelphia, PA.Posted: October 30th, 2020 05:10AM
Company: NoType of Polygraph: Stealing
I living in a place with crazy girl trying to say that I broke in stole her money I did not
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $300.00
Posted by: Pratisha Singh in Melbourne, VT.Posted: April 11th, 2020 04:04PM
Company: PersonalType of Polygraph: Lie
I want to test my husband and I have five questions
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $0.00
Posted by: Dena Grundseth in Ruidoso, NM.Posted: March 22nd, 2020 10:03PM
Company: Type of Polygraph: Stealing
My moms weeding ring went missing i know i had it on my dresser. When he was confronted by me, he told me "i was nuts" then he started crying
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $200.00
Posted by: Sharece in Decatur, GA.Posted: November 13th, 2019 05:11AM
Company: Lie detector textType of Polygraph: Lie detector test
I been in a 2 year relationship we started to live with eachother out of 1 year in that 2 year relationship when I first got my place I noticed my things being moved every time I’ll come home I thought I was tripping at first but the truth came out 3months later from her sister that she was cheating on me with her baby daddy also I try to forgive eventho she said she didn’t I will catch things in her phone also a men came to my door as soon as I got home asking for her she said he came for her best friend due to her best friend do not live there I feel she is haven’t sex she claim she isn’t I would like to know if she ever had sex in there and also with her baby daddy
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $200.00
Posted by: Cheryl Morales in Sacramento. California, CA.Posted: November 11th, 2019 10:11PM
Company: Type of Polygraph: Lie detector
We have been together for 40 years and we have been married for 30 years during this time we have not had sex for 13 years and I want to know if he had sex with other women I need to know because he won't tell me the truth because I want a divorce if I'm right I need someone in Sacramento,California
Was this post helpful to you?   yes     no Report prohibited or spam
Wrong Or Right
Amount: $50.00
Posted by: Doris Gooch in Fresno, CA.Posted: October 21st, 2019 10:10PM
Company: Type of Polygraph: The Truth Or Not The Truth
I need help to prove "Right's & Wrong's" please help me. Thank u!
Was this post helpful to you?   yes     no Report prohibited or spam
Trucking Troubles
Amount: $150.00
Posted by: Mrs. C Begley in London, KY.Posted: October 6th, 2019 10:10AM
My husband recently went OTR trucking & he is home from Fri. -Monday morning. All of sudden he is lying to me & things are completely different than they have been the past 10 years of our marriage! I have a gut feeling he's being unfaithful! How much for polygraph to find out for sure!
Was this post helpful to you?   yes     no Report prohibited or spam
My bf is accused me of cheating
Amount: $0.00
Posted by: ᴷᴬᵀᴴᴿᵞᴺ Reynolds in Paoli, IN.Posted: July 25th, 2019 09:07PM
Company: 1992Type of Polygraph:
My bf is accused me of cheating with his cousin while he was in jail when I know I didnt and it because his family said I did I just wanna put this to rest
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $0.00
Posted by: Casey Smith in Scranton, PA.Posted: July 24th, 2019 04:07AM
Company: 1994Type of Polygraph: Any
My fiancee is about to leave me because of his families stories that aren't true I can't afford 500 dollars nevermind 200 to take a test what do I do?! We have a 3 month old :(
Was this post helpful to you?   yes     no Report prohibited or spam
Trust issues
Amount: $200.00
Posted by: David s S. in Charlotte, NC.Posted: July 8th, 2019 04:07AM
I need a polygraph test done to prove that I haven’t slept or done anything with anyone and I been honest about who I hooked up.
Was this post helpful to you?   yes     no Report prohibited or spam
Indefinitely/Trust Issues
Amount: $780.00
Posted by: Jennifer Dontcap in Collinsville, IL.Posted: June 25th, 2019 05:06AM
Company: A-1 Polygraph LCCType of Polygraph: Lie Detector
Was with my boyfriend for 12 years. Was 100% faithful. But bc I was raped in 2013, he started to question my honesty and fidelity. After YEARS of abuse, criticism, fights and nervous breakdowns, I decided to spend the money and have one done.. Not just to prove myself to him once and for all but TO PROVE TO THE WORLD THAT I WAS INFACT, THE HONEST, REAL, TRUTHFUL WOMAN I CLAIMED TO BE! I take pride in being that girl & you cant put a price tag on PEACE & PRIDE.
Needless to say I passed with flying colors.. waiting on him to muster up the guts to go and have one done! Probably not going to happen.. IDC.
Was this post helpful to you?   yes     no Report prohibited or spam
Trust issues
Amount: $0.00
Posted by: Nicholas James Williams in Phoenix, AZ.Posted: June 11th, 2019 05:06PM
Company: Type of Polygraph: Lie detector
My roommate and I were coming back home from a long night of losing at the casino and only me and him knew I had my gun in my car when we got home he went to his room where his girl friend is also there awake so he went to sleep my other roommate in the back was sleeping as well and my other roommate was just getting out of the shower. So she got dress and we both slept on the couch in the living room and I was laying on top of her so I know she didn't get up. So the only one that was up was the girl friend of the guy that knew where the gun was at. She kept walking up and down the hall way what I remember when I was half asleep so later about 4pm we woke up and the girl friend and guy were gone and my gun is gone from the car. They swear that they didn't take it and every one is pointing there fingers at them. I would like to do a test on every one in this house to find out the truth of who took my gun and try to get it back because it is in my name and so I can't kick out the lier ou
Was this post helpful to you?   yes     no Report prohibited or spam
Trust issues
Amount: $100.00
Posted by: Eric Ulintz in Pittsburgh, PA.Posted: May 2nd, 2019 05:05AM
Company: Type of Polygraph: Lie
My wife and I have split up and want to be back together but both of us are accusing each other of cheating so we both have agreed to this test to prove to each other please help us
Was this post helpful to you?   yes     no Report prohibited or spam
Trust issues
Amount: $100.00
Posted by: Wayne W, Lilly in Cimora, VA.Posted: February 5th, 2019 05:02AM
Company: Type of Polygraph: Lie
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $0.00
Posted by: Innocent but need more evidence. in Philadelphia, PA.Posted: January 5th, 2019 09:01AM
Company: Type of Polygraph: Lie detectot
Have a criminal court case coming up where I am the defendant because the plaintiff lied and says I attacked her but she attacked me so I need a polygraph prove it we have no Witnesses my child was in the house and she made sure hers was not. She stabbed me but I got arrested.
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $300.00
Posted by: Gustavo Plancarte in Aumsville, OR.Posted: December 18th, 2018 05:12PM
Company: Type of Polygraph: Lie detecter
In need of help! I could end up homeless for stealing a perfume that I dont even knew my family had!
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $0.00
Posted by: robert f blank in philadelphia, PA.Posted: December 6th, 2018 08:12AM
Company: oneType of Polygraph: ??
my daughter says I called cps and I did not. now I cannot see my grandson.
Was this post helpful to you?   yes     no Report prohibited or spam
Trust issues
Amount: $0.00
Posted by: Rob x in Landsford, PA.Posted: November 11th, 2018 08:11AM
Company: LandscapingType of Polygraph: Any
My girlfriend thinks I've been looking at porn on my phone cause she found son tranny porn on my phone. When she asked me I was just as shocked as her and told her I'm not sure but since my phone I got from a friend that may it's there from before or maybe when I let my coworkers use it they might've or maybe it was an accident I didn't. But I really need to get a test done so I can clear up the accusations cause it's going to ruin my family
Was this post helpful to you?   yes     no Report prohibited or spam
Amount: $200.00
Posted by: Dusty tacker in Gun berral city, TX.Posted: July 30th, 2018 01:07AM
Company: PersonalType of Polygraph: Trust issues
Was this post helpful to you?   yes     no Report prohibited or spam
Bf has in his head that after having a pretty bad argument even though it wasn't stable for my child to be around ,that me leaving to go to a friend's house for one night means I was shady and believe
Amount: $200.00
Posted by: Ericka Clayton in Geelong, Other.Posted: July 24th, 2018 03:07AM
Company: Type of Polygraph: Lie
I have 2 i Need a lie detector on.
1.Sick of being accused from my bf of something iv never done and never did one night when a ultacation occurred.
2. He has in his head I was having sexual intercourse with different men before we got together.
Was this post helpful to you?   yes     no Report prohibited or spam
Family problems
Amount: $0.00
Posted by: Heather Vincent in Sacramento, CA.Posted: July 17th, 2018 07:07PM
Company: Necklace missingType of Polygraph: mom and fiance ask them if they took th
it's killing me and my husband has never taken anything from me so happened my mom went to where I told her to go and it wasn't there my husband didn't know he had to be told and then it wasn't there I don't know what to believe I've turned my house up and upside down and I know where I put it I just have one question for two people and I see the prices are from 200 to 400 to 2000 is there anyone that can give me a deal I really need this because I can't prove any thing it's killing me
Was this post helpful to you?   yes     no Report prohibited or spam
My husband thinks i'm cheating
Amount: $150.00
Posted by: Regina Harris in PERTH AMBOY, NJ.Posted: May 28th, 2018 11:05AM
Company: Faith within cleaningType of Polygraph:
Need to prove him wrong
Was this post helpful to you?   yes     no Report prohibited or spam

Page 2 of 2   -   << Previous   1   2   


Comment On Your Experience With Lie Detector Testing
Subject:  *
Amount Spent:  *
Company: Type of Polygraph: 
Purchased:  Year: 
City:  * State:  *
Information about you:
Email:  * Email addresses are not displayed.
Name:  This is the name we'll display with your post.
me on this computer
*=required field.

External Resources:
More Personal Finance Topics
Check Out All Costs for Personal Finance How Much Do Tax Returns Cost? How Much Does Closing a Home Cost? How Much Does a Traffic Ticket Attorney Cost?

Search Thousands of Topics on

Today's Featured Cost Articles

About CostHelper
CostHelper is based in Silicon Valley and provides consumers with unbiased price information about thousands of goods and services. Our writers are experienced journalists who adhere to our strict editorial ethics policy.

CostHelper Community
Cost of care
Paid: 0.00
Wow, some of these previous comments seriously concern me. We have a dentist carrying on about how much it cost for his entire education and the cost of building and supplying an entire office... [more]
-Jason B
Dental Implants Cost
Generac 22kw quote
Paid: 18000.00
Recently quoted$18k for 2,400sq ft. Home. The generator itself is $5,300 with transfer switch. Nearly $13k install seems very high... [more]
-Jon Rad
Standby Generator Cost
2013 honda crv ignition cylinder repair
Paid: 180.00
Locksmith came to my house and repaired lock cylinder in an hour... [more]
-Brad Cowan
Ignition Lock Cylinder Replacement Cost
Teacup Pig
Paid: 100.00
Looking for a teacup pig. I’ll pay $100-300 if you have what I’m looking for in my price range please let me know... [more]
-Evelyn Hernandez
Teacup Pig Cost
You will not believe this!
Paid: 75000.00
Non emergency flight from Tucson to Phoenix this was 2021 I could have flown around the world several times what a 130 miles was these people need to go to jail for fraud and theft!I will never pay the huge bill chapter 7 only costs $2500... [more]
-Paul Polito
Air Ambulance Cost
L3-L4,L4-L5,L5-S1 multilevel laminectomies with micro disectomies.
Paid: 0.00
I had laminectomies and refused to have spinal fusion. I made a complete recovery. I had my surgery Apr/2020. Returned to work in mid-June. Feel good as new today. No back stiffness or pain... [more]
-Jose A Elizondo
Back Surgery Cost