How Much Is a Lie Detector Test?

Private investigators have been using lie detector tests for many years to help clients who are pursuing the truth. Although lie detectors are quite misunderstood by the public, they have been very useful tools for investigators working privately and in law enforcement. You may not realize it, but there are many situations where being able to perform a lie detector test can make a huge difference.

Naturally, there is a question of how much it costs to have these tests performed. A lie detector test is only as accurate as the investigator performing it.

When a private investigator attaches the probes of the lie detector to a person body, they are able to record the persons:

• Heart rate
• Respiration rate
• Skin electrical conductivity
• Blood pressure

• Finding out if an insurance claim could be false
• As part of employment screening
• To determine if someone is innocent of something e.g. infidelity
• To narrow down the list of suspects in a crime
• Sexual offender testing etc.

The cost of lie detector tests varies depending on a number of factors. You can pay anywhere between £400 to £900 depending on the specific parameters of your case.

In some cases, you could find private investigators who charge above or below these amounts. Most professional investigators will ask for a deposit too. This prevents them from going at a loss if the subject reneges at the last minute.

In the UK, it is possible to get a lie detector test in almost any location where there are private detectives. There are private investigators located all around the UK who offer polygraph testing services, and there are many other professional investigators who are willing to travel to where the client is.

However, it's also important to do a thorough vetting of the person you contact about lie detector services. You should know who they are, what their experience is and what previous customers think of their services.

The prices charged by private investigators in the UK are quite favourable compared to the prices charged in many other countries. Due to the number of available investigators and the availability of the necessary equipment, you'll find that the price is more or less in the same range as what professionals in countries such as the United States charge.

However, just like in the UK, there are outliers i.e. investigators whose charges are much higher or much lower compared to the norm. There are some whose charges can go as high as £1,200 per test and others whose charges can be as low as £120. Although there are cases that justify high prices e.g. if significant travel is required, private investigators offering very low prices should be double checked.