Polygraph Testing, also called a lie detector test, records physiological responses while a person answers set questions. Examiners use it for workplace incidents, screening and personal matters. Send one request and independent examiners reply with availability and prices.
Say what the test is for and how many people, and get polygraph quotes.
Request a Private Investigation QuoteTypes of Test
- Specific issue. One incident, such as a theft or loss.
- Pre-employment. Screening candidates on honesty, past conduct and drug use.
- Periodic. Routine testing of staff in sensitive roles.
- Personal. Relationship and family matters, including infidelity questions.
Who Uses It
Employers dealing with stock or cash losses, security and cash-in-transit companies, and individuals who want a specific question tested.
What to Send First
- The type of test and number of people.
- Your area and whether you need on-site testing.
- When you need it done.
- A safe way to contact you.
Do not send the details of the incident or names of suspects through the request form.
How It Works
- Consent. The person must agree to the test in writing.
- Pre-test interview. The examiner explains the process and reviews the questions.
- Test. Questions are asked while responses are recorded.
- Result. A written report with the examiner's opinion.
Limits
A polygraph cannot be forced on anyone. Results are an examiner's opinion, not proof. In employment matters the CCMA and courts do not accept a polygraph result on its own as grounds for dismissal. Use it as one part of a wider investigation.
Polygraph Testing Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Standard test, per person | R550 - R1,800 |
| Pre-employment screening, per person | R700 - R2,500 |
| Specific-issue or infidelity test | R1,500 - R5,000 |
| Corporate theft or fraud test, per person | R2,500 - R4,000 |
| Travel beyond about 100 km | Around R6.50 per km |
Prices JUST UPDATED. Indicative ballpark figures in rand, rounded. They are compiled from prices published by South African investigation firms and typical market rates. They are not our prices or quotations, and no investigator is bound by them. Confirm VAT, travel and what each quotation includes.
Get a price for your test rather than a range. Send one request and compare replies.
Request a Private Investigation QuoteWhat Affects the Price
- Type of test. Specific-issue tests take longer than screening.
- Number of people. Group testing can lower the per-person rate.
- Location. On-site testing adds a call-out and travel.
- Report detail. Reports for disciplinary hearings may cost more.
Polygraph Testing FAQs
Can an employer force me to take a polygraph?
No. A polygraph needs the person's consent. Refusal should not by itself be treated as an admission.
Is a lie detector test accurate?
It is not infallible. Results are an examiner's opinion and should be weighed with other evidence.
Can I dismiss someone based on a failed polygraph?
Not on that alone. Speak to a labour law adviser before acting on a result.
How long does a test take?
Usually one and a half to three hours, including the pre-test interview.
Can couples do a polygraph test?
Yes. Many examiners offer personal tests on specific relationship questions, with consent.
Related Services
Request polygraph testing quotes through Private Investigators South Africa and compare each examiner's test type, report and travel costs.
Private Investigators South Africa is a referral and quote service. We do not carry out investigations and we do not employ investigators. Work is quoted and carried out by independent investigators, and your agreement is with the one you choose. Ask for a written quotation and proof of PSIRA registration before you pay a deposit. No investigator can promise a particular result or that evidence will be accepted by a court.
Polygraph Testing. Describe what you need once and get the best quote, fast.
Request a Private Investigation QuoteGet the Best Quote, Fast
Keep it brief. Do not send ID documents, passwords, intimate images or evidence through this form. Your enquiry is passed only to investigators suited to the job, and you decide whether to go ahead.
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