Sydney Private Investigators

Costs of Hiring a Private Investigator in Australia

The Anh Luong • January 27, 2025

Hiring a private investigator (PI) might sound like something out of a detective movie, but in reality, many people—both individuals and businesses—turn to PIs for help with legal matters, background checks, surveillance, and more. But one of the biggest questions people have before hiring a PI is: How much does it cost?


If you've never hired a private investigator before, understanding the pricing can be confusing. Costs can vary based on the type of investigation, the time required, and the level of expertise needed. In this guide, we'll break down everything you need to know about private investigator costs in Australia so you can make an informed decision without surprises.


What Factors Affect the Cost of a Private Investigator?


Unlike fixed-price services, private investigations are highly customized. Several factors influence the total cost, including:


Type of Investigation


Different cases require different levels of expertise and resources. Some of the most common investigations include:


  • Surveillance – Following and monitoring someone’s activities
  • Background checks – Digging into a person’s history (criminal, financial, employment, etc.)
  • Infidelity investigations – Gathering evidence of cheating partners
  • Legal case investigations – Supporting civil or criminal cases with evidence
  • Debt recovery – Locating individuals who owe money


Each of these services requires different techniques, equipment, and time, which impacts pricing.


Investigator’s Experience and Credentials


A highly experienced investigator with a strong track record will typically charge higher rates than someone new to the field. Licensed and reputable PIs often invest in the latest technology, legal training, and professional certifications, ensuring high-quality results.


Location of the Investigation


If the investigation takes place in a highly populated area like Sydney or Melbourne, costs may be higher due to demand and operational expenses. Investigations in regional or remote locations might also cost more due to travel time and additional resources required.


Duration of the Investigation


Some cases can be resolved in just a few hours, while others may take weeks or even months. Surveillance, for example, is often charged hourly, so the longer the job, the higher the total cost.


Equipment and Technology Used



High-tech tools such as hidden cameras, GPS trackers, forensic software, and advanced surveillance equipment can increase costs. Some cases also require accessing public or restricted databases, which may have associated fees.

Type of Investigation

How Much Do Private Investigators Charge in Australia?


Private investigator costs in Australia vary depending on the factors mentioned above, but here are some general price ranges:


Hourly Rates


Most private investigators charge by the hour. The typical range is:


  • $80 – $200 per hour for general investigations
  • $100 – $300 per hour for specialized investigations (e.g., legal cases, corporate fraud)
  • $150 – $400 per hour for high-risk or urgent cases


Many agencies have a minimum hourly commitment, meaning you may need to book a minimum of 3–4 hours even if the job is shorter.


Flat Fees for Specific Services


For services like background checks or locating missing persons, PIs often charge a flat fee rather than an hourly rate. Estimated costs include:


  • Basic background checks – $300 to $700
  • Comprehensive background checks – $1,000+
  • Skip tracing (finding a missing person) – $500 to $2,500
  • Infidelity investigations (1–3 days of surveillance) – $1,500 to $5,000


Retainer Fees


Some private investigators require a retainer upfront, similar to how lawyers operate. This could range from $1,000 to $5,000, depending on the complexity of the case. The investigator will deduct costs from this retainer as they work on the case.


Travel Expenses



If your case requires long-distance travel or international investigations, expect to cover additional costs for:


  • Flights and accommodations
  • Fuel and mileage expenses
  • Meals and incidentals during travel
How Much Do Private Investigators Charge

Are Private Investigators Worth the Cost?


Many people wonder whether hiring a PI is worth the investment. Here’s how to determine if it’s a good financial decision for you:


  • Legal Advantage: If you're involved in a legal case (divorce, fraud, or custody battle), a PI’s evidence can significantly strengthen your position.
  • Peace of Mind: Whether it's confirming suspicions of infidelity or ensuring a business deal is legitimate, the clarity a PI provides can be invaluable.
  • Time and Effort Saved: Conducting investigations on your own can be time-consuming, risky, and legally complicated. A professional can handle it discreetly and effectively.
Are Private Investigators Worth the Cost?

How to Choose the Right Private Investigator


If you’ve decided to hire a PI, here are a few tips to ensure you get the best value for your money:


  • Verify Their License and Credentials: Private investigators in Australia must be licensed under state laws. Always check that they have a valid license before hiring.
  • Ask About Pricing Upfront: To avoid unexpected costs, request a detailed breakdown of fees before signing any agreements. A good PI will be transparent about their pricing.
  • Look for Experience in Your Specific Case Type: Not all PIs handle every type of investigation. If you need corporate fraud investigation, for example, hire someone with experience in that area rather than general surveillance.
  • Read Reviews and Ask for References: Look for testimonials, online reviews, or references from past clients to get an idea of their reputation.
  • Consider Communication and Confidentiality: A professional investigator should be discreet, responsive, and clear about what they can and can’t do within legal boundaries.
How to Choose the Right Private Investigator

Hiring a private investigator in Australia isn’t cheap, but it can be a valuable investment depending on your needs. Costs vary based on the complexity of the case, the expertise of the investigator, and the duration of the investigation. By understanding the pricing structure and knowing what to expect, you can make an informed decision and get the most out of your PI services.

If you're considering hiring a private investigator, do your research, ask the right questions, and choose someone with the right experience and credentials for your case.

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