What Does a Private Investigator Cost in the UK? (2026 Guide)

Updated 5 October 2026 by Investigation Bureau

For a simple job, less than most people fear. For a complex one, more than the cheapest quote you will find. And a cheap quote for complex work usually means paying twice: once for the job done badly, and again for the job done properly.

Cost is the first thing most people ask about, and they are right to. This guide sets out how pricing works across the UK industry in 2026: the typical figures, what pushes a price up or down, and the signs that a low quote is going to cost you more in the end.

Typical UK private investigator prices in 2026

Rates depend on the region, the complexity of the job and the quality of the people doing it. The figures below are typical of the UK market as a whole. They are not our own price list.

Hourly rates. Most professional investigators charge somewhere around £50 to £150 an hour. London and specialist work sit at the top of that range. Sole traders in cheaper regions sit at the bottom.
Covert surveillance. Commonly £60 to £120 per operative per hour, or a day rate of roughly £500 to £1,200 per operative, which covers a vehicle, equipment and reporting. Serious matrimonial or workplace surveillance typically runs for 1 to 3 days.
People tracing. Often a fixed fee, commonly £150 to £500 depending on how cold the trail is. Many agencies offer no trace, no fee on suitable cases, and so do we.
Cyber and online investigations. Usually quoted per case after an assessment. Verification work starts at a few hundred pounds, and complex fraud tracing can run to several thousand.
Corporate work. Due diligence, fraud and TSCM (bug sweeping) are quoted per project. Bug sweeps start at around £500, depending on the size of the area swept.

Our own practice is simple. After a free, confidential first conversation we give you a fixed quote in writing before any work begins. The figure you agree is the figure you pay.

What actually drives the price

People-hours are the main cost. One investigator watching one address is the baseline. A subject who drives, a team follow or overnight cover multiplies it. An experienced investigator designs the smallest operation that can meet your objective, and honest planning at this stage is where you save the most money. If someone proposes a large team before they have asked what you need to know, ask why.

Complexity and risk. A subject who is alert to surveillance, a rural location where a parked car stands out, or evidence intended for court and not only for your own peace of mind: each adds planning, and sometimes people.

Equipment and technology. Covert video, vehicles and lawful tracking equipment are included in a professional day rate. Technology also affects how many billable hours are lost to coordination. We run our own operations platform, built in-house, so that less paid time goes on coordinating the work and more on doing it.

Reporting standard. A WhatsApp message with a blurred photo is cheap to produce. If anything legal may follow, what you need is a timestamped evidence package with chain of custody, prepared so that a court can admit it. That takes time, and the time is part of the price.

Red flags in a cheap quote

A price with no conversation first. Someone who quotes without understanding the job is offering a hook, not an estimate.
Open-ended hourly billing with no cap. The meter keeps running and the updates grow vague.
A guaranteed result. No investigator controls what the truth turns out to be. We stand behind the quality of the operation and never promise the outcome. Anyone who promises the outcome is selling something.
Silence about the law. If tracking, tracing or surveillance is offered with no mention of what is lawful, the "evidence" may be unusable, or criminal. Our GPS tracker law guide shows how much this matters.
Nobody accountable. Before you pay anything, check there is a registered UK company you can look up at Companies House, an ICO registration, a named person accountable for the work, a written quote and a clear refusal to do anything unlawful. If any of those is missing, there is nobody to hold to account once your retainer has been paid.

Frequently asked questions

How much does it cost to follow someone for a day?

A realistic UK budget for professional covert surveillance is £500 to £1,200 per operative per day. That covers the vehicle, the equipment and a written evidence report. A team of several operatives costs proportionally more, and should be proposed only when one operative cannot reliably keep hold of the subject.

Do private investigators charge upfront?

Most professional agencies take payment or a deposit before deployment, because surveillance time is booked for you and cannot be resold. That is normal practice and not a warning sign in itself. What matters is that the price is fixed and agreed in writing first.

Is a private investigator worth the money?

Where the question is serious (a relationship, a child's welfare, an employee costing you thousands, money lost to fraud), not knowing usually costs more than finding out. The first conversation is free. You can put your situation to us, take the quote away and think about it, with no obligation.

Can I get a price without giving my name?

You can get a general idea, yes. We need a way to reply to you, but beyond that you can describe the situation in broad terms through the confidential enquiry form, with only as much detail as you are comfortable giving at that stage. We will tell you what kind of work it calls for and what that typically costs. A precise fixed quote, and any deployment, needs the real details. We handle those in strict confidence and in line with UK GDPR.

Get a fixed quote. Start with a free, confidential first conversation with an investigator. Send a confidential enquiry and we reply within one working day.