Fixed pricing
One price, published. No hidden extras.
Every price includes the pre-test consultation, the examination itself and a written report. A £150 deposit reserves the appointment and comes off the total. Travel to any of Lie Detector UK's offices is included in it — no call-out charge, and no per-mile fee.
Fixed pricing
One price, published. No hidden extras.
England & Wales · Scotland £695
- Single examinee
- Up to 3 relevant questions
- Written report included
Two people tested · Scotland £850
- Two separate examinations
- Same appointment, same office
- Two written reports
Per examination
- Workplace investigations
- Our office or your premises
- Report per examinee
All prices include the pre-test consultation, the examination and a written report. A £150 non-refundable deposit secures the booking; the balance falls due 48 hours before the appointment.
Scotland
Scotland is priced separately
Examinations in Scotland are £695 for one person and £850 for a couple, and availability varies by location. Please contact the office before booking so we can confirm a date. 020 8058 6848
What the fee covers
Four things, all included in the £495
The pre-test call
A conversation with the examiner who will conduct your examination, before you pay anything, to work out whether a polygraph is the right tool at all.
The examination
Around two hours at a private office — the pre-test interview, the questions you approved in advance, and the charts themselves.
The written report
Scored and issued in writing within 24 to 48 hours. Not a verbal summary on the day, and not an optional extra.
The room
A private examination office. Travel to any of our 124 locations is included — there is no call-out charge and no per-mile fee.
How payment works
Deposit now, balance before the date
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01
You pay £150 to reserve
Taken securely by Stripe when you book. Card details are handled by Stripe and never touch this website.
-
02
The examiner confirms
Confirmation arrives by email and SMS, then a call to agree the questions before the date.
-
03
The balance of £345
Due 48 hours before the appointment. The deposit comes off the total — it is not a fee on top of it.
-
04
Nothing further
No report fee, no booking fee, no VAT surprise. If anything ever does need charging, you are told before you commit, not after.
Common questions
The questions people actually ask us
How accurate is a lie detector test?
A validated technique, run properly by an accredited examiner, sits at 95–98%. Anyone quoting 100% is selling you something else.
Does being nervous affect the result?
No. Nervousness is expected and shows up on every chart. The analysis compares your responses against each other, not against a calm stranger.
What questions will be asked?
Up to three relevant questions, agreed with you in the pre-test consultation. Nothing is asked on the day that you have not already seen.
Can I refuse to take the test?
Yes, at any point, including once you are in the room. An examination in the UK cannot proceed without your written consent.
How long does the test take?
Around two hours in total. Most of that is the consultation and question review; the instrument phase is the shortest part.
Can I attend someone else’s test?
No — a third party in the room invalidates the examination. You are welcome to wait in reception and to see the written report if the examinee consents.
Do you offer home or on-site tests?
Tests are normally conducted at our private office in the UK, where the environment can be controlled. Alternative locations may be possible subject to pre-approval.
Do you test under 18s?
Only in limited circumstances, with the written consent of a parent or guardian, and at the examiner’s discretion. Please call to discuss before booking.
Do medications affect the results?
Tell your examiner what you take. Most prescriptions are fine; a few are not, and your examiner will say so before you pay the balance.
Can the test be cheated?
Countermeasures are what examiners are trained to spot. Attempting them typically produces an inconclusive result, not a pass.
How much does a lie detector test cost in the UK?
£495 all inclusive for one person and £695 for a couple, covering the consultation, the examination and a written report. A £150 deposit reserves the appointment.
