Startup cost
$2k–$15k
TRUiC Business Ideas
How to Start a Private Investigation Firm
Decision Snapshot
Private Detective
Idea Score
65
Profit margin
21%
Break-even
4 mo–12 mo
Time to launch
12 wk–36 wk
Demand trend
Stable
5-yr failure rate
—
Capital intensity
Medium
Time commitment
Full time
Part 1 - How to start a Private Investigation Firm business - Background
Private detectives help clients with a wide range of issues. These issues may be of a personal, financial, or legal nature. As such, good private detectives must have a working knowledge of these different fields in order to help their clients and avoid breaking the law.
Our guide is in 3 parts:
- Part 1 - How to start a Private Detective business - Background
- Part 2 - Our planner tool to see if this idea is the right fit for you
- Part 3 - Action plan to get started
What are the costs involved in opening a private investigation firm?
Most private detective businesses effectively start out of the home, meaning that the bulk of the costs of opening the business rests with the equipment. For instance, many investigators are able to start their business for less than $3,000. This includes the cost of a laptop ($700 or less), video camera and covert cameras ($350 or less), and various equipment ($150 or less for a couple of memory cards, an external hard drive, and a tripod and monopod for cameras). It should be $1400 or less to acquire your business and agency licenses as well as insurance. Finally, it should be $500 or less to tint your vehicle windows, build a website yourself (using online templates if necessary), and purchasing various office supplies.
What are the ongoing expenses for a private investigation firm?
The beauty of a private detective business that you run out of your own home is that your ongoing expenses are low. For instance, you may continue traditional advertising each month (probably $200 or less due to the increasing significance of online marketing). Otherwise, your office space and utilities are built into your standard rent, and various job-related expenses such as travel and accommodations are things that you bill your clients for. This means that the payout for most jobs, minus those extra expenses you bill them for, is pure profit.
Who is the target market?
Generally, the best clients are those who want information on a spouse they think is cheating. These cases may be emotionally charged, but the blunt truth is that such cases are the bread-and-butter for many private detectives, with things like fraud investigations being more rare.
How does a private investigation firm make money?
Generally, a private detective makes money by charging clients an hourly fee for various services. How much you charge will vary based on the services.
How much can you charge customers?
Exactly how much you can charge clients varies wildly. For instance, a standard hour of investigative work should typically cost anywhere between $50 and $100. You may also charge expenses such as travel and hotels (when necessary), and you should consider charging per picture (say, $5 to $10) or charging a flat fee for pictures (typically between $30 and $50). And, of course, you can (and should) charge separately for various services such as background checks (up to $200), driving record checks (up to $75), and GPS device tracking (a minimum of $50 a day).
How much profit can a private investigation firm make?
Because of the nature of this job, the exact amount of profit that you make is determined by how many clients you take on. The Bureau of Labor and Statistics reports that the median salary for this job is just over $45,500, whereas the top ten percent of this field make more than $85,000. While that may seem low compared to certain other fields, the extremely low cost of both starting and maintaining this business means that you potentially deal with almost no overhead.
How can you make your business more profitable?
Shamelessly put your logo on cases of water, boxes of donuts, and supplies like t-shirts and mousepads. Generously give these out to current and potential customers so that they are regularly reminded of you and your services. At your discretion, take on cases for reduced cost or even free of charge in order to build up your publicity and public goodwill.
Day-to-Day and Growth
What happens during a typical day at a private investigation firm?
Being a private detective is one of the jobs where your daily activities may be completely different from day-to-day. Some of the representative duties include going undercover at various businesses, writing case summaries and reports, reviewing security videos and transaction records, and searching various public and records and databases. You may be called upon to testify about some of your findings, especially in cases of fraud or other criminal activity.
What are some skills and experiences that will help you build a successful private investigation firm?
The exact requirements of the license you will require vary by state. However, experience in military or law enforcement work can be a big help in getting started. Similarly, experience working as a detective for a law firm or other agency can be invaluable when you are starting out on your own. Most states do not have an educational requirement to become a detective, but a degree in Criminal Justice or a related field may confer many of the necessary skills you will need. Finally, a pre-existing license for a concealed weapon (if your work makes a firearm necessary) will ultimately save you time.
What is the growth potential for a private investigation firm?
The growth potential of this business is slow but steady, with the Bureau of Labor and Statistics predicting a five percent growth in jobs in this field between 2014 and 2024. If you are knowledgeable about hacking and cybercrime, your business may flourish even more as this kind of crime becomes even more of a prime concern.
What are some insider tips for jump starting a private investigation firm?
The best way to jumpstart your business is to go ahead and do all of the personal training and prep you need. This includes self-defense training, firearms training, concealed carry licensing, and any formal or informal legal and financial training you require. You may also consider specializing in a niche service, which will help differentiate your business from others and allow you to concentrate on a specialty that you are already good at.
How and when to build a team
Most detective agencies start out with just one investigator. Over time, however, you may have more cases than you can reasonably work or simply have time conflicts regarding some of your potential clients. At that point, you should consider taking on a partner. You may want to hire a larger staff, but this will eventually necessitate the down payments and ongoing rent for office space, which will seriously impact your monthly earnings.
Part 2 - Is a Private Investigation Firm business the right fit for you?
Business Evaluation & Strategy Tool
We'll walk you through the four pillars every business needs: Points of Leverage, Marketing Strategy, Financial Model, and Personal Compatibility. At the end you'll see a personalized report and your action plan below will be tailored to your answers.
Step 1 of 4 — Points of Leverage
Every viable business has natural advantages. Below are common leverage points across four categories. Pick the ones that apply to your Private Detective business. We've pre-suggested a few based on your idea — review and adjust.
Step 2 of 4 — Marketing Strategy
Without a way to connect with customers, even great businesses fail. Pick the channels you plan to use to reach your customers.
Step 3 of 4 — Financial Model
Enter your monthly baseline costs — the minimum overhead to keep the business running. Then we'll calculate how many sales per month you need to break even.
Step 4 of 4 — Personal Compatibility
A business that doesn't fit your life will fail no matter how good the numbers look. Tell us how this business fits you.
Your Private Detective Evaluation Report
Complete the four pillars and your personalized summary will appear here.
Points of Leverage
Marketing Strategy
Financial Model
Personal Compatibility
Part 3 - Action plan to launch your Private Investigation Firm business in 90 days
Nine concrete steps to take you from idea to open business, grouped into 30-day phases. Complete the planner above and we'll highlight what's most important for your situation.
First 30 days — Foundation
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Form your legal entity
An LLC keeps your personal assets separate from business debts and lawsuits — the most common reason small business owners choose this structure. Sole proprietorships and partnerships do not provide this protection.
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Get an EIN and register for taxes
Apply for your free Employer Identification Number through the IRS, then register for any state or local taxes that apply to your business (sales tax, franchise tax).
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Open a business bank account and credit card
A dedicated business account is required to maintain personal asset protection. Mixing personal and business finances ('piercing the corporate veil') can void your LLC's liability shield.
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Set up business accounting
Recording expenses and income from day one makes tax filing easier and lets you see when the business is actually profitable. Use software (QuickBooks, Wave) or a part-time bookkeeper.
Days 30–60 — Compliance & Risk
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Get permits and licenses
State and local requirements vary widely. Brick-and-mortar businesses typically need a Certificate of Occupancy; service businesses may need specific professional licensing; food businesses need health permits.
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Get business insurance
General Liability Insurance is the most common starting point. If you'll have employees, most states require Workers' Compensation. Specific industries need additional coverage (product liability, professional liability, etc.).
Days 60–90 — Launch
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Define your brand
Your brand is how customers perceive and remember you. A clear name, logo, and visual identity make every later marketing decision easier and protect you legally as you grow.
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Create your business website
Every legitimate business needs a website. Social media pages are not a substitute — you don't own the platform. Modern website builders mean you can launch a clean site in a weekend without a developer.
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Set up your business phone system
A dedicated business number keeps your personal life private, makes the business look legitimate, and lets you route calls professionally. Cloud phone services start under $20/month.