How to Start a Business in Colorado (2026)

Fact-checked by the LegalGlass editorial team against primary sources · Published Aug 6, 2026 · Last updated Aug 6, 2026

To start a business in Colorado, you must register your entity with the Colorado Secretary of State. For a Limited Liability Company (LLC), this involves filing Articles of Organization (Form CDOS_LLC_AO) and paying a $50 filing fee. All registered entities must appoint a Colorado registered agent and comply with state and local tax obligations, including income tax and sales tax if applicable.

Overview of Starting a Business in Colorado

Starting a business in Colorado involves several key steps, primarily centered around registering your business entity with the Colorado Secretary of State (SOS) and complying with state and local tax and licensing requirements. The specific steps depend on the type of business structure you choose, such as a sole proprietorship, partnership, Limited Liability Company (LLC), or corporation. Most formal businesses in Colorado, especially LLCs and corporations, must register with the Secretary of State.

Colorado offers an online business filing system that streamlines the registration process. Key requirements include selecting a unique business name, appointing a registered agent, and understanding your tax obligations with the Colorado Department of Revenue. This guide focuses on the general steps applicable to most new businesses, with specific details for forming an LLC as a common business structure. For a national perspective on business formation, see how to start a business.

Steps to Start a Business in Colorado

The process of starting a business in Colorado generally follows these steps, which ensure compliance with state regulations and federal tax law.

1. Choose your business structure. Decide whether your business will be a sole proprietorship, partnership, LLC, or corporation. This choice impacts liability, taxation, and administrative burden. An LLC is a popular choice for small businesses due to its liability protection and flexible taxation.
2. Select and reserve a business name. Choose a name that is distinguishable from other entities registered with the Colorado Secretary of State. You can check name availability through the SOS business search portal. If you're not ready to file immediately, you can reserve a name for 120 days. Ensure your name also doesn't infringe on any existing trademarks.
3. Appoint a Colorado registered agent. Every registered business entity in Colorado must designate a registered agent with a physical street address in Colorado. This agent receives legal documents and official correspondence on behalf of your business.
4. Register your business with the Secretary of State. For an LLC, file Articles of Organization (Form CDOS_LLC_AO) online with the Colorado Secretary of State. For a corporation, you would file Articles of Incorporation. This step legally creates your business entity.
5. Obtain an EIN (Employer Identification Number). Most businesses, especially LLCs with multiple members, corporations, or those with employees, need a federal EIN from the IRS. This is a free number used for tax purposes and to open business bank accounts.
6. Register for state and local taxes. Register your business with the Colorado Department of Revenue for state income tax, sales tax (if you sell taxable goods or services), and any other applicable taxes. You may also need to register with local tax authorities.
7. Obtain necessary licenses and permits. While Colorado does not have a single statewide general business license, many professions require specific state occupational licenses. Additionally, most cities and counties require local business licenses or permits.
8. Draft an operating agreement (for LLCs). Although not filed with the state, an operating agreement is crucial for an LLC. It outlines ownership percentages, management structure, voting rights, and profit distribution, helping to prevent future disputes among members.

After completing these steps, you should open a dedicated business bank account and ensure ongoing compliance with annual reporting requirements and tax filings.

Colorado Business Filing Fees (2026)

The primary cost for registering a business in Colorado is the filing fee with the Secretary of State. The table below outlines common fees for new businesses, particularly LLCs, effective for 2026. These fees are set by the state and are not associated with any third-party filing services.

The Colorado Secretary of State processes filings quickly, usually within minutes for online submissions, so expedited processing is generally not necessary or offered for standard filings. Always verify the latest fees on the Secretary of State's website before filing.

Colorado Registered Agent Requirement

Every entity registered with the Colorado Secretary of State, including LLCs and corporations, must continuously maintain a registered agent and a registered office in Colorado. The registered agent is the official point of contact for receiving legal documents, such as service of process, and official government correspondence.

The registered agent must be an individual Colorado resident or a domestic or foreign entity authorized to transact business in Colorado. The registered office must be a physical street address in Colorado; a post office box is not sufficient. You designate your initial registered agent when you file your Articles of Organization or Incorporation. If you need to change your registered agent later, you can do so by filing a Statement of Change with the Secretary of State, which typically incurs a small filing fee. Failure to maintain a registered agent can lead to administrative dissolution or revocation of your business's authority to operate in Colorado.

Colorado State and Federal Tax Obligations

Businesses operating in Colorado are subject to various state and federal taxes. Understanding these obligations is crucial for compliance.

Federal Taxes

Most businesses will need a federal Employer Identification Number (EIN) from the IRS. This is a unique nine-digit number used for federal tax purposes. Sole proprietorships without employees may use the owner's Social Security Number, but an EIN is generally recommended for all formal businesses. The IRS assigns default tax classifications: single-member LLCs are treated as disregarded entities (taxed as sole proprietorships), multi-member LLCs as partnerships, and corporations as C-corps. Businesses can elect different classifications, such as S-corporation status, by filing appropriate IRS forms.

Colorado State Taxes

The Colorado Department of Revenue (CDOR) administers state taxes. Key taxes for businesses include:

• Income Tax: Colorado imposes a state income tax. For 2026, the corporate income tax rate is 4.40%. Pass-through entities like LLCs (unless they elect corporate taxation) and partnerships generally do not pay income tax at the entity level; instead, profits pass through to the owners, who pay individual income tax on their share.
• Sales Tax: If your business sells tangible personal property or certain taxable services, you must collect and remit Colorado sales tax. The state sales tax rate is 2.90% (2026), but local sales taxes (city, county, special districts) can significantly increase the total rate. You must obtain a sales tax license from the CDOR, which is free.
• Withholding Tax: If you have employees, you must withhold Colorado income tax from their wages and remit it to the CDOR.
• Unemployment Insurance Tax: Businesses with employees must also pay state unemployment insurance taxes to the Colorado Department of Labor and Employment.

It is essential to register with the CDOR for all applicable tax types. The CDOR website provides resources for business registration and tax filing.

Business Licenses and Permits in Colorado

Colorado does not have a single, statewide general business license that all businesses must obtain. However, most businesses will need some form of license or permit at either the state or local level.

• State-Level Licenses: Many professions and industries are regulated by the Colorado Department of Regulatory Agencies (DORA). This includes fields such as healthcare, real estate, construction, and various trades. You will need to check if your specific business activity requires a state occupational license or permit.
• Local Licenses and Permits: Almost all cities and counties in Colorado require businesses to obtain local business licenses or permits to operate within their jurisdiction. These can include general business licenses, zoning permits, health permits (for food service), building permits, and fire permits. The requirements vary significantly by municipality, so it is crucial to contact your city and county clerk's offices to determine what is needed for your specific location and business type.

Failure to obtain required licenses and permits can result in fines, penalties, and even the forced closure of your business. See business licenses for more information.

Ongoing Compliance: Periodic Reports and Other Obligations

Once your business is established in Colorado, you must meet ongoing compliance requirements to maintain its good standing. The primary ongoing obligation with the Secretary of State is the annual periodic report.

• Periodic Report: All entities registered with the Colorado Secretary of State must file an annual periodic report. This report updates the state with current information about your business, such as its principal office address, registered agent, and management. The report is due annually during the three-month period beginning on the first day of the entity's anniversary month of formation. The filing fee for the periodic report is $10. Failure to file can lead to administrative dissolution or revocation of your business's authority.
• Tax Filings: You must regularly file state and federal tax returns and remit any taxes due. This includes federal income tax returns (Form 1040 Schedule C for sole proprietors, Form 1065 for partnerships, Form 1120 for corporations), Colorado income tax returns, sales tax returns (if applicable), and payroll tax filings.
• Registered Agent: You must continuously maintain a valid registered agent and registered office. If your agent or office changes, you must file an update with the Secretary of State.

Staying on top of these ongoing obligations is essential to avoid penalties and ensure your business remains legally compliant.

Frequently Asked Questions

How much does it cost to start an LLC in Colorado?

The filing fee for Articles of Organization (Form CDOS_LLC_AO) is $50, paid to the Colorado Secretary of State. There is also an annual periodic report fee of $10.

What do I file to create a Colorado LLC?

You file Articles of Organization (Form CDOS_LLC_AO) with the Colorado Secretary of State. This can be done online through the Secretary of State's business filing system for a $50 fee.

Does a Colorado business need a registered agent?

Yes. Every Colorado entity must continuously maintain a registered agent and a physical Colorado street address. The agent must be an individual Colorado resident or a qualified entity.

Does Colorado have a state income tax for businesses?

Yes, Colorado imposes a state income tax on businesses. The corporate income tax rate is 4.40% for 2026. Pass-through entities like LLCs are generally not taxed at the entity level, but owners pay individual income tax on their share of profits.

When is the Colorado periodic report due?

The periodic report is due annually during the three-month period beginning on the first day of the entity's anniversary month of formation. The filing fee is $10.

Do I need a business license in Colorado?

Colorado does not have a single statewide general business license. However, many professions require state-level occupational licenses, and most cities and counties require local business licenses or permits. Check with the Department of Regulatory Agencies (DORA) and your local municipality.

Related

• How to start a business (cluster hub)
• How to form an LLC
• Colorado registered agent requirements
• How to get an EIN
• Business licenses and permits
• How to start a business in Texas (sibling)

Sources

1. Colorado Secretary of State - Business Home Page (general business information).
2. Colorado Secretary of State - LLC Forms & Information (Articles of Organization, CDOS_LLC_AO).
3. Colorado Secretary of State - Business Filing Fees ($50 LLC formation, $10 periodic report, $20 trade name, $25 name reservation).
4. Colorado Secretary of State - Registered Agent Information (requirements for registered agent).
5. Colorado Secretary of State - Business Entity Search (name availability).
6. Colorado Department of Revenue - How to Register a Business (state tax registration).
7. Colorado Department of Revenue - Sales Tax Information (state sales tax rate, license).
8. Colorado Department of Revenue - Business Income Tax (corporate income tax rate 4.40%).
9. Colorado Department of Revenue - Withholding Tax (employer obligations).
10. Colorado Department of Labor and Employment - Unemployment Insurance for Employers.
11. Colorado Department of Regulatory Agencies (DORA) - Business Licenses & Permits (state-level occupational licenses).
12. IRS - Get an Employer Identification Number (EIN) (free EIN application).
13. IRS - Limited Liability Company (LLC) (federal tax classification).
14. Colorado Revised Statutes - Title 7, Article 90, Part 3 - Registered Agent (legal basis for registered agent).
15. Colorado Revised Statutes - Title 7, Article 80, Part 2 - Formation of LLC (legal basis for LLC formation).

LegalGlass provides general information for educational purposes and is not a law firm or a substitute for advice from a licensed attorney or tax professional. Laws, fees, and thresholds change; verify current requirements with the Colorado Secretary of State and Colorado Department of Revenue before acting.