How Much Does a Private Investigator Cost in London?
A private investigator in London usually charges by the hour for surveillance and a fixed starting fee for research-based work such as background checks or tracing. At London Private Investigators, surveillance starts from £65 + VAT per hour, per operative (£78 including VAT), a standard background search starts from £550 + VAT and a standard people trace starts from £300 + VAT.
Those are starting points, not final bills. The rest of this guide explains what pushes the price up or down, so you can plan a budget before you pick up the phone.
What affects the cost of a private investigator?
Four things drive almost every quote: the type of work, the number of investigators, the hours involved and how much information you can provide at the start.
Desk-based work, such as checking records, companies and public information, is usually priced as a fixed fee. Surveillance is priced by the hour, per operative. That is because the cost depends on how long the team is deployed and how many people are needed to follow someone safely and discreetly.
Good starting information saves money. Dates, addresses, recent photographs, known vehicles and a clear question all help the investigator work efficiently. Without them, paid hours go on finding the basics.
How much does surveillance cost in London?
For private clients, surveillance is normally charged from £78 including VAT per hour, per operative (£65 excluding VAT at the current standard VAT rate), unless a fixed fee is agreed in writing. You choose the dates, times and duration you want covered. The quote confirms the exact period, team, total operative-hours and VAT-inclusive price before anything is booked.
Most surveillance enquiries come from people worried about a partner. Our cheating partner and matrimonial investigations page explains how those deployments are planned so the hours are focused on the times most likely to answer your question.
Why might you need more than one investigator?
London makes surveillance harder than it looks. A person who switches from car to Tube, leaves by one of several exits or walks through busy streets can easily be lost by a single investigator. A simple static job may need one person, but a moving subject often needs a team. A good firm explains why before you agree to it.
How much do background checks and tracing cost?
Research-based work is usually more predictable in price:
- A standard Background Search starts from £550 + VAT.
- Partner background, pre-marital and online-dating investigations start from £660 including VAT (£550 + VAT).
- A standard people trace starts from £300 + VAT.
- Missing-person and welfare enquiries start from £450 + VAT.
Common names, several identities or overseas links add time, so these cases are quoted after the information has been reviewed. You can see what is included on our background checks in London page.
What do specialist services cost?
- Vehicle bug sweeps start from £450 + VAT, residential sweeps from £750 + VAT and commercial sweeps from £1,250 + VAT.
- Home-visit polygraph testing starts from £650 + VAT.
- Digital and online investigations start from £650 + VAT, and online-harassment investigations from £750 + VAT.
- Child custody and safeguarding investigations start from £750 + VAT (£900 including VAT).
For a TSCM bug sweep, the size of the property, the number of rooms, the equipment, travel and urgency all affect the final price.
How much do corporate investigations cost?
Business cases are usually staged. Corporate fraud investigations start from £1,250 + VAT for the first stage. Employee misconduct investigations start from £750 + VAT, and internal theft and stock-loss investigations from £1,000 + VAT. Corporate due diligence starts from £750 + VAT.
Starting with a focused first stage shows whether wider work is worth the extra cost. Our corporate fraud and employee misconduct page explains how each stage is agreed.
How can you keep the cost down?
- Be clear about the decision you are trying to make, not just the suspicion.
- Pick the right window. One well-chosen evening often answers more than a week of open-ended watching.
- Share everything useful at the start: names, addresses, vehicles, routines and photographs.
- Ask whether a background check could answer the question before paying for surveillance.
Is the cheapest private investigator the best choice?
Not if the low price comes from cutting legal corners. Anyone offering to hack accounts, read private messages or fit a tracker to a car you do not own is offering evidence that may be worthless. That kind of work can also put you at legal risk.
A lawful investigator gives you a written quote, explains what the work can and cannot show, and tells you plainly if an investigation is unlikely to help.
Get a clear quote before you commit
The quickest way to understand the cost of your case is to talk it through. Speak with one of our private investigators in London on 020 3834 9289 or send a confidential WhatsApp. You will receive a written quotation setting out the work, price and likely timescale, and you are not committing to anything by contacting us.
Frequently asked questions
Do you charge for the first conversation?
No. Speaking to us about your situation does not commit you to anything, and many people call simply to talk it through first.
Are your prices shown with or without VAT?
Most starting prices are shown plus VAT. For private surveillance and several private client services, we also show the VAT-inclusive price, and every written quotation confirms the total including VAT.
Will I know the full price before the investigation starts?
Yes. You receive a written quotation confirming the work, the investigators required, the hours and the total price before anything is booked.