How to Start a Business in Colorado (2026): A Step-by-Step Guide

Colorado is one of the least expensive states to form a company. An LLC or corporation costs $50 to file online with the Colorado Secretary of State, and the yearly periodic report is $25. To start a business in Colorado, pick a structure, file your Articles of Organization or Incorporation online, get an EIN, then register with the Colorado Department of Revenue and your city for taxes and licenses.

Sole proprietors don’t form an entity, but if they work under any name other than their legal first and last name, Colorado requires a $20 trade name filing. All figures below are as of October 2026.

Updated October 2026.

Best Business Formation Services in Colorado (2026)

Here are our top picks for forming a business in Colorado, ranked. Mainstay Filing comes first for its flat yearly price; the two Colorado registered agent services below it are options if you only need an agent.

1. Mainstay Filing

Mainstay Filing is our top pick in Colorado. It costs $199/year + state fee at cost and covers lLC formation filing, registered agent for the year, EIN application, annual report preparation and filing. The price stays the same every year, with no add-on menu.

2. CO Registered Agent.org

CO Registered Agent.org is a Colorado registered agent service at $99/year. It provides $99 per year, flat; in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.

3. Colorado Registered Agent.co

Colorado Registered Agent.co is a Colorado registered agent service at $99/year. It provides in-state street address for the registered office; legal documents served on the company are scanned and sent to the owner online. It’s a fit if you only need a registered agent rather than full formation help.

Fees to start a business in Colorado at a glance

What does year one cost in state fees?

A typical Colorado LLC pays $50 to form. Add $25 if you reserve the name first and $20 if you also trade under a different brand name. The first $25 Periodic Report comes due around the formation anniversary, so most single-brand LLCs spend $50 to $95 on Secretary of State fees in their first twelve months, before any city licenses.

Which structure should a Colorado business use?

The Secretary of State registers the entity; the tax treatment is a separate decision. As the SOS puts it, S or C corporation status is decided with the IRS, not with the state. The practical options:

• Sole proprietorship: no entity filing, no liability shield. File a trade name if you use any name other than your own.
• General partnership: two or more owners with shared personal liability. A partnership operating under a name other than its partners’ names files a trade name.
• LLC: the most common choice for small owner-run companies, with liability protection and flexible tax treatment.
• Corporation: better for investors and stock-based compensation, with more governance requirements.

Because LLCs and corporations cost the same $50 to form and the same $25 a year to maintain in Colorado, the choice usually comes down to taxes and ownership plans rather than state fees. Our Colorado LLC guide covers the LLC route in depth.

How do Colorado’s name rules and trade names work?

Search the Colorado business database first. The SOS recommends searching on a few key words and leaving out “LLC,” “Inc.” and small words, which turns up near matches more reliably. The name must include the correct term or abbreviation for your entity type, and the SOS’s own examples show that “ABC LLC” and “ABC Limited Liability Company” count as different names.

If you are not ready to file, a name reservation costs $25 and lasts 120 days, and it can be renewed. Our Colorado business name search guide explains the search screen and distinguishability rules.

Before settling on a name, try a few variations in the Namechk business name generator and check domains and social handles on Namechk.

When do you need a Colorado trade name?

Colorado’s version of a DBA is a Statement of Trade Name, filed online for $20. According to the SOS, a for-profit business that isn’t using its entity’s true name, or an individual not using their legal first and last name, must file one. A trade name filed by a reporting entity (such as an LLC) stays effective as long as the entity remains in good standing. Trade names for individuals and general partnerships last one year and must be renewed ($5) during the three months before they expire.

What are Colorado’s registered agent rules?

Every Colorado entity must appoint a registered agent when it forms, and the state won’t accept the filing without one. The agent needs a physical address in Colorado. Under 2024 legislation that took effect July 1, 2025, an individual serving as registered agent must hold a valid Colorado driver’s license or ID card (or verify Colorado residency another way), and the filing asks for that ID number. Colorado does let an entity serve as its own agent, but only by first appointing an eligible agent and then filing a change.

You can serve as your own agent if you meet those rules. Owners who’d rather not list a home address often use a commercial agent; Mainstay Filing includes one for the first year with its formation service. Changing your agent later costs $10, or you can update it free while filing your periodic report. More detail is in our Colorado registered agent guide.

How do you file with the Colorado Secretary of State?

Colorado business filings are online only; the fee schedule lists no paper option for formation documents. The process:

1. Go to the SOS File a document page and choose Articles of Organization (LLC) or Articles of Incorporation.
2. Enter the name (or claim your reservation), principal office address and registered agent details, including the agent’s Colorado ID number if the agent is an individual.
3. List the person forming the entity and pay the $50 fee by card.
4. Save the filed document and your entity ID number for later registrations.

Then put your internal rules in writing: an operating agreement for an LLC, or bylaws and initial board resolutions for a corporation. Colorado doesn’t require you to file them. For a fuller look at formation costs, see Mainstay’s Colorado LLC cost guide.

Do you need an EIN in Colorado?

The Colorado Secretary of State does not issue EINs; the IRS does. Apply free on the IRS EIN page. You need one to hire, to open most business bank accounts, and for multi-member LLC or corporate tax filings.

Federal beneficial ownership (BOI) reports are no longer required for U.S. companies; FinCEN’s final rule took effect August 14, 2026.

Which Colorado tax accounts will you need?

The Colorado Department of Revenue handles sales tax licensing, wage withholding and state income tax accounts. MyBizColorado, the state’s online starting point recommended by the Secretary of State, lets you begin registrations with several state agencies in one place.

• Sales tax license: required if you sell taxable goods at retail. Many Colorado cities collect their own sales tax and require a separate city license, so check both levels.
• Wage withholding: register before your first payroll.
• Unemployment insurance: employers register with the Colorado Department of Labor and Employment, which also handles new-hire reporting.

Colorado sets a statewide minimum wage that adjusts each January, and some cities such as Denver set higher local rates, so confirm the current figures before you set pay.

What licenses does a Colorado business need?

There is no general statewide business license. The SOS points owners to three sources:

• State: the Colorado Department of Regulatory Agencies (DORA) licenses professions and trades from accountants and contractors to barbers and healthcare providers.
• Local: cities and counties issue business licenses, sales tax licenses in home-rule cities, zoning approvals and health permits.
• Federal: certain industries need federal permits, such as alcohol, firearms and aviation.

Setting up banking, insurance and a website

Open a business checking account once your entity is on file; banks usually ask for the filed articles, your EIN and your operating agreement. Keeping finances separate is what lets an LLC’s liability shield hold up.

For insurance, general liability is the baseline for most businesses, professional liability covers advice and services, and workers’ compensation becomes necessary once you have employees. Finally, register a domain that matches your name and set up a website.

What keeps a Colorado business in good standing?

The main recurring task is the Periodic Report. Your reporting month appears on your entity’s summary page in the SOS database, and you can file without penalty from two months before to two months after that month. The fee is $25 online; a late filing adds a $50 penalty, and an entity that doesn’t file becomes Delinquent.

• Renew trade names for individuals and partnerships every year.
• Keep registered agent details current (free when filed with the Periodic Report).
• File sales tax and withholding returns on the Department of Revenue’s schedule, and renew local licenses.

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