No licensing required on the state level, but Kansas City, St Louis,
Joplin, St Joseph and Springfield require licensing.
Missouri Revised Statutes
Chapter 84
Police Departments in St. Louis and Kansas City
Section 84.340
Missouri
P.O. Box 720
Jefferson City, MO 65102
August 28, 2000
Board of police - power to regulate private detectives (St. Louis):
The police commissioner of the said cities shall have power to regulate
and license all private watchmen, private detectives and private policemen,
serving or acting as such in said cities, and no person shall act
as such private watchman, private detective or private policeman in
said cities without first having obtained the written license of the
president or acting president of said police commissioners of the
said cities, under pain of being guilty of a misdemeanor.
(1974) Held constitutional as not being an unlawful delegation of
legislative power nor as to being discriminatory in that police officers
of the city are not required to be licensed or pay fee when acting
as a watchman. ABC Security Service Inc. v. Miller (Mo.), 514 S.W.2d
521.
Private investigator businesses which are located outside of the above
referenced cities should contact their local city hall and/or county
clerk's office and local law enforcement agencies for any possible licensing/permit
regulations.
Helpful web site information: Missouri Association of Private Investigators,
Inc. http://www.pimall.com/nais/d-mo.html
Mission: MAPI mission is to establish and promote state-wide association
which will organize, serve and educate members, enforce professional
cannons of ethics, establish mutual feelings of trust, goodwill and
friendship among the members of the group and others in investigative
agencies throughout the State of Missouri.
Legal Structure
Anyone conducting business in the State of Missouri under a name other than
their own legal name (e.g., John Doe), must register the business name with
the Missouri Secretary of State. Missouri law allows businesses to operate under
four forms or organization:
- Sole proprietorship
- Partnership - general and limited
- Corporation - C-Corp; S-Corp; Professional, Not-for-Profit; Foreign Corporation
- Limited Liability Company - LLC
Each structure has its own advantages and disadvantages and there are many
modifications and variations within these forms. The key to selection revolves
around the concept of liability and taxation. You must decide which of these
structures best suits your business. In choosing your business structure, consult
with a qualified accountant and/or attorney who are familiar with your resources
and objectives.
A description of the forms of organization and some of the advantages and disadvantages
are discussed in Legal Structures, Licenses
and Taxes and Starting
a New Business in Missouri
[256k].
The Licenses
and Registration Checklist is a guide to help you with the licensing and
registration requirements for starting your new business.
You can download forms on the web at: www.sos.mo.gov/business/corporations/forms.asp
or request from the Secretary of State's Office at (573) 751-3200.
Taxes
Understanding the taxes that apply to your business and how to meet the legal
requirements of those taxes is critical. Consultation with an accountant or
attorney is advisable.
Tax considerations are essential during the formation of a new business and
during its entire life. When a business is just starting out, it may have little
or no income or assets and the choice of structure may not seriously affect
its tax liability. However, as the business grows, the tax implications become
more significant.
Choosing a particular structure does not necessarily determine how the business
will be taxed. The table found in Starting a New Business in Missouri
[246k] identifies the state and federal forms that must
be filed for different business structures and compares the tax liabilities
for the most common business structures.
Tax responsibility includes federal, state and local taxes. As a business owner
you will be responsible for income taxes, payroll taxes, property tax and other
miscellaneous taxes.
Any business making wholesale or retail sales must obtain a Missouri Retail
Sales License from the Missouri Department of Revenue. A bond, based on projected
monthly gross sales is posted at the time of application. An application form
(Form #2643) can be obtained from the Dept. of Revenue on the web at www.dor.mo.gov/tax/business/forms/
or by calling 1-800-877-6881. Generally, a wholesaler or manufacturer will present
a Sale/Use Tax Exemption Certificate (Form #149) to the seller showing the sale
is exempt from sales tax.
For more information on taxes and access to printable copies of the required
forms visit: Doing
Business in Missouri: Taxes
[531k] and the IRS/SBA
Small Business Resource Guide.
Hiring Employees
Obtain
a copy of "Employer's
Tax Guide"
[340k] from your local IRS office or call 1-800-829-3676.
"Circular E" explains federal tax withholding and Social Security tax requirements
for employers as well as containing up-to-date withholding tables for you to
use to determine how much federal income tax and Social Security tax is to be
withheld from each employee's paycheck.
What Is Involved?
- Once you begin paying salary or wages to employees, you must collect taxes
from your employees. The primary taxes are: federal and state income taxes,
Social Security (FICA) and Medicare taxes.
- If you have not already done so, you must apply for a federal
employer identification number (EIN) -- Form SS-4. This number is used
to identify your business on payroll and income tax returns, as well as for
other federal tax purposes. Corporations and partnerships must file Form SS-4
even if they have no employees. The IRS now offers an online
EIN application.

- Each employee completes an I-9
Employment Eligibility Verification Form
and a W-4
form
[53k].
- Missouri require that all employers in Missouri report each newly hired
employee to the Department of Revenue within 20 calendar days of hire.
For more information on your responsibilities as an employer, please contact
your local Missouri Career Center (formerly Job Service). To locate the nearest
office, check the phone book or call 1-888-728-JOBS or visit www.greathires.org/cgi-bin/career_centers.cgi. 
For a complete discussion on hiring employees, your responsibilities, and access
to the required forms, refer to: Doing
Business in Missouri: Hiring Employees
[432k].
Business Resources
You may also find the following information helpful as you begin your business:
- Starting
a New Business in Missouri
[246k] is an excellent publication on the process of
starting and operating a business in Missouri.
- Evaluating
Your Business Idea
[587k] is a simple questionnaire-formatted document
that helps you think through the elemental considerations in starting a business.
- Guide to Writing a Business Plan
[382k] provides a short, but thorough introduction to
the process of writing a business plan and provides a simple outline of the
contents of a standard plan.
- MissouriBusiness.Net is a
network of key business resource providers in Missouri. The Web site contains
a vast array of helpful documents, links and information on starting and operating
your small business as well as a calendar
of upcoming training and educational events
throughout Missouri. To find a business counselor near you, refer to www.missouribusiness.net/sbdc/centers.asp
- The Missouri Environmental Assistance Center helps businesses. improve business efficiency and save money through reducing or eliminating waste understand and navigate the complicated area of environmental permits and regulations. The Web site offers information on environmental compliance, pollution prevention and energy efficiency.
- Contact your local (county, city, township) government offices early in
the planning stages of your business. The requirement for local licenses and
permits vary by county and city. Most cities, and some counties, require businesses
to be licensed. Check with the city business/merchant license office and/or
the county collector's office for the requirements in your area. Be sure
to check with the local city and/or county planning/zoning department to make
sure that the site you have selected for your business is zoned to accommodate
the activities of your business. These offices can be found in your local
phone directory.
- Missouri
Lawyer Referral Service

- Kansas City: (816) 221-9473 (Clay, Jackson, Platte & Ray counties)
- St. Louis City & County: (314) 621-6681
- Springfield/Greene County: (417) 831-2783
- Rest of Missouri: (573) 636-3635
Web: www.mobar.org/fa9a5c63-a2c3-4c6e-a86a-de191b13e501.aspx 
- Missouri Society
of Accountants
1-800-959-4276
Web: www.missouri-accountants.com 