How much does it cost a private investigator?

How much does a private detective in Madrid cost?

We offer a system of prices with total transparency indicated in our fees section. Our detective agency offers the fees stipulated by the Association of Private Detectives of Spain, however, given that each case requires a special complexity and dedication for us, we offer special prices according to your situation and your case.

The recommended prices are detailed below, but do not hesitate to contact us so that we can offer you, free of charge and without obligation, a personalised quote.

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What criteria are taken into account?

In order to develop our private investigator fee table we have based ourselves on different elements such as:


  • Number of private detectives required.
  • Use of specific means of transport.
  • Time zone of the investigation.
  • Specialisation in the type of investigation.
  • Particular complexities of each investigation.
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What is the best price for a detective?

The best price for a private detective you can hire will be one that has a good price/quality ratio.

It is not a good idea to go to those professionals who have cheap prices or outside the general ranges that the Professional Association of Private Detectives of Spain can guide you for many reasons. Among the main ones are adequate experience, availability of appropriate technology, necessary training and you may even be hiring a fake detective.

You can have a positive experience by turning to well-trained and experienced professionals such as Grupo Arga Detectives.

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What do we always include in the price?

  • Opening of a file.
  • Expert report.
  • Photographic material.
  • Compliance with the LOPD.
  • Civil liability insurance.
  • Confidentiality guarantee.
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Request a free quote

Request a quote

Get to know the rates of private detectives for individuals and companies

If you have any doubts about what price to choose or any other element of the investigation, please do not hesitate to contact our private detective agency, either by filling in our form, writing an email to or calling us directly on +34 608 76 79 79 or +34 913 866 294.

Rates for specialised investigations

Business investigations

Business investigations

1. Pre-employment reports from 800€.

2. Financial reports from 800€.

2.1. Solvency reports

2.2. Asset seizure

2.3. Location of seized assets

3. Mystery shopping from 360€.

4. Fraudulent dismissals from €450

5. Unfair competition from €450

6. Control of managers and sales staff from €450

7. Unfair competition from 450€.

8. Plagiarism of trademarks and patents from 450€.

9. Fraud and scam investigation from €450

Family investigations

Family investigations

1. Paternity tests from 360€.

2. Inheritance from 550€.

3. Investigation of infidelity from 280€.

4. Verification of dubious conduct from 280€.

5. Modification of divorce measures from 360€.

6. Related to children's behaviour (addictions, bad company, consumption, etc.) from 280€.

7. Demonstration of lack of suitability or responsibility in custody from 360€.

8. Alimony or compensatory alimony from 360€.

9. Modification of the regulatory agreement based on proving the marital cohabitation of the ex-spouse from 360€.

Particular investigations

Particular investigations

1. Old rents from €360.

1.2. Duplicity of addresses

1.3. Subletting

1.4. Assignments and transfers

1.5. Dedication of the property

2. Search and location of people from 220€.

3. Personal reports from 360€.

4. Polygraph test from 800€.

Computer investigations

Computer investigations

1. Analysis of mobile terminals from 590€.

2. Research on social networks from 450€.

3. Computer forensic investigations from 1.100€.

4. Recovery of deleted WhatsApps from 590€.

5. IP detection from 750€.

6. Computer security audits from 1.500€.

Technological investigations

Technological investigations

1. Electronic countermeasures from 1.500€.

2. Electronic sweeps from 850€.

3. Installation of hidden cameras from 650€.

4. Counterespionage from 1.500€.

5. Hidden cameras from 360€.

Other investigations

Other investigations

1. Fingerprint analysis from 850€.

1.2. Non-uniformed surveillance services on request.

2. Counter-surveillance from 280€.

3. Genetic analysis from 750€.

4. Handwriting expert reports from 550€.

5. International investigations from €3.000.

Get fixed prices and no surprises in your private investigation

Trust and confidentiality

We can assure you that all information that comes into our hands is classified only between the client and the detective, unless the client asks us to testify before a judge or jury in order to win a case or win an argument in which a detective and his verbal information is necessary.

Be that as it may, we can say that you can fully trust that whatever information we find out about a person, we will never divulge any information and best of all, you have our word because we have the detective client code of ethics.


Hiring a detective is an investment

According to our clients and users of our services, we have been able to guarantee good results in most cases, if not all, because we have a very low margin of error and by error, we mean being left without clues or at a crossroads that we cannot solve, what we want is to be the best.

In order to achieve our objective, we aim to carry out our work in the best way possible, always focusing on the clues and information gathered so that at no time do we lose the course of the investigation and thus achieve not only the objectives but also the quality that the client expects at all times.


Legality at the time of action

Arga detectives has the best value for money private detective prices. We are a totally legitimate agency and we are working in a completely legal way without the need to get into any kind of trouble, as all the information is 100% legitimate.

When we say that it is 100% under the rule, it means that it is under all the regulations imposed by the Ministry of Interior, so you know that we do not break the law at any time and that we are in fact registered to work as detectives.



Because we want to be the best in the business of private investigation, our detectives are committed not only to support the client with everything they need, but we want to help because we are happy to do so, so we are always committed to doing our job.

If you want a detective to help you in the best way and to be able to perform thanks to their skills and knowledge then you will not find any other agency that resembles ours, with the necessary studies and the essential technologies to be able to get what the client needs in a short time, we have no comparison.


Committed to quality work

Because we want to be the best in the business of investigations and detectives, each of our detectives is committed not only to support the client with everything they need but, as mentioned above, they want to help because it is rewarding to do so, so we are always committed to doing our job.

Quality is what defines each of our detectives, that is why we care about excellent service and we are always committed to doing what is necessary to complete the job.


We achieved the objectives

Our private detectives are the best of the best because they are not only investigators who study once in their life to be able to do their job, the detective is of the specialty that is always has to be learning new ways to get the information you need, and that is why we are at the forefront of technology and knowledge.

Choosing our private detectives at any time will give you not only the information or data you need but will also make you get it as fast as possible, because we have ways that no other agency has to get information because our detectives are always polishing their skills.


Why choose to hire us over other agencies?

Unlike other agencies, ours has total security and we guarantee that all our detectives are totally legitimate. Exactly, the person who is watched by an illegal detective can always sue him, it is better to avoid all these so-called detectives who charge too cheaply for a service that can be more expensive.

The services we offer at our agency are second to none, which is why hiring us not only gives you security against information theft, confidentiality and the expertise you need, but you are paying very little for the price of a value-added service with the skills of many investigations, i.e. it is a job whose quality is priceless.

Transparency in prices and rates

Given the number of private detective agencies that exist throughout the country, we can say that for years we have stood out for our excellent professionals and the private detective rates we offer. In Arga Detectives group we have earned the trust of our customers thanks to the prices we offer, being the most economically accessible compared to other agencies in the areas in relation to value for money. Once you contact our detectives, you will be given a free quote based on the service you need, our detectives will attend you for free before starting the investigation.

You should also bear in mind that the costs will vary according to the service you need, but there is no need to worry because they will still be affordable for your pocket, with free advice from our detectives.

For these and many other reasons, we have established ourselves as the best agency in terms of private detective rates, so we recommend you to contact us, as our detectives provide multiple services throughout the country.


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