Tracing Agent or Private Investigator: Which Do You Need?

Updated 5 October 2026 by Investigation Bureau

If all you need is a current address for a lawful purpose, such as a debt, a former tenant, court papers or an estate, and you have the person's name plus a date of birth or an old address, a fixed-price address trace is the cheaper and quicker route. You need a private investigator when the address is not the whole job: the person is avoiding being found, the address must be confirmed on the ground, papers have to be served, the evidence is going before a court, or the real question is what is going on and not where they live.

We are investigators, and we would sooner send you to the right service than sell you the larger one. This guide sets out what each costs across the UK market, how long each takes, what you receive, and when each is the wrong choice.

What each one does

A tracing agent finds a person's current address. The work is done at a desk, from licensed data and public records, and a fixed-price address tracing service is that work sold as a standard product, usually online. A private investigator traces people too, but also makes enquiries on the ground, carries out surveillance, supports the service of court papers, researches assets and backgrounds, and gives evidence about what was found.

Neither title is licensed in the UK, and plenty of firms do both. The label matters less than one question: is the address the whole job?

When a fixed-price address trace is the right choice

Use a fixed-price address tracing service when three things are true. You need a current address and nothing else. Your purpose is lawful: a debt to recover, a former tenant to pursue, court papers to send, a beneficiary to pay. And you can identify the person with a full name plus a date of birth or an old address.

You pay a fixed fee, and the result comes back in a few working days. You receive a dated report giving the person's current registered address with a confidence rating, and with the better services there is nothing to pay unless the person is found.

If the budget is small and the address is the whole job, that is the right place to go. Instructing an investigator for the same answer means paying for depth you will not use.

When you need an investigator

You need an investigator when the address is only part of the question:

The person is deliberately avoiding being found. Nothing is in their own name, and the registered address is one they left on purpose.
The address must be confirmed by someone on the ground. Records show where a person is registered. A visit shows who actually lives there.
Papers have to be served. Personal service, and proof of it, is field work, as our guide to process servers explains.
You need to know about assets, employment or lifestyle. Whether a debtor is worth suing is a different question from where they live.
The evidence is going before a court. The court may want a statement from the person who gathered it.
The trail crosses a border. UK data stops at the border, and cross-border work is handled with trusted partners.
The question is really "what is going on?" Who someone is with, what they are doing or whether a story is true is not a trace at all.

Cost, time and what you receive

The figures here are typical of the UK market as a whole. They are not our price list.

A fixed-price address trace:

Cost. A single fixed fee, usually below the range for an investigator-led trace.
Time. A few working days.
What you receive. A dated report with the current registered address and a confidence rating.
When it is the wrong choice. The person is in hiding, you hold only a name, or you need anything confirmed in person, served or explained in court.

An investigator-led trace:

Cost. Commonly a fixed fee of £150 to £500, depending on how cold the trail is. Wider investigation is priced by the job, and our cost guide gives the market rates.
Time. Often days for a straightforward UK trace, and weeks where the person is evasive or the trail runs abroad.
What you receive. A full report on how the person was located and what was confirmed, with a witness statement if the matter needs one.
When it is the wrong choice. The address is all you need, the person is not hiding and the budget is tight.

Our own prices are never taken from a list. You have a fixed quote in writing before any work begins.

What an investigator's tracing report adds

An investigator's tracing report is fuller than a fixed-price address report. It sets out how the person was located, what was confirmed and how, and any related findings, such as other occupiers, a vehicle at the address or a linked company. It is written so that a court can rely on it. Our guide on how investigators find people describes the method.

Some clients prefer that depth even for a straightforward trace: a solicitor who wants the file complete, or an executor who wants every step recorded. That is a legitimate choice. It simply costs more than the address alone.

Trace first, investigate if the trace says so

Many matters start as a trace and only become an investigation if the trace shows there is more to it. The address comes back as a relative's house. The person is registered in two places. The letter sent to the new address is returned. At that point you know what you are paying an investigator to resolve.

So trace first is usually the sensible order. The exception is where you already know the person is evasive, or the papers must be served by hand. Then begin with people tracing by an investigator and avoid paying twice.

Whichever you use, the hard limits are the same: no interception of communications, no access to accounts or devices without authority, no records obtained by deception, no tracker without a documented lawful basis, and no tracing so that someone can be harassed.

Frequently asked questions

Do I need a private investigator to find someone?

Not always. If you need only a current address for a lawful purpose, and you have the person's name with a date of birth or an old address, a fixed-price address trace will usually do it for less. You need an investigator when the person is avoiding being found, or when you need confirmation on the ground, service of papers or evidence for a court.

What is the cheapest way to find someone's address in the UK?

The free public records come first: the open electoral register, Companies House and the other sources in our guide to finding someone's address lawfully. If those fail, a fixed-price address tracing service is the cheapest reliable route, particularly one that charges nothing unless the person is found.

How much does a private investigator charge to find a person?

Across the UK market an investigator-led trace is commonly a fixed fee of £150 to £500, depending on how cold the trail is. Overseas traces and deliberate disappearances cost more and are quoted individually. We give a fixed quote in writing before any work begins.

Can I start with an address trace and bring in an investigator later?

Yes, and it is often the best order. A trace is the cheapest way to find out whether the matter is simple. If the address is confirmed and your letter is answered, you are finished. If the result raises new questions, give the report to the investigator so that nothing is done twice.

Not sure which you need? Tell us what you are trying to achieve and we will say plainly whether a trace is enough. The first conversation is free: start a confidential enquiry.

Only need a current address? Trace Bureau is our fixed-price address tracing service. Instruct online in about five minutes and you are charged only when the person is found. You receive a dated report with their current registered UK address and a confidence rating. Trace an address with Trace Bureau.

Sister service: Trace Bureau is our fixed-price address tracing service, for anyone who only needs a current UK address for a lawful purpose. Charged only when we find them. Investigation Bureau is a Bureau Nine company.