How to Start a General Contracting Business in Colorado

Starting a general contracting business in Colorado requires more than showing up with a toolbelt and a truck. You need a business structure, proper licenses, insurance, tax registrations, and sometimes bonding. This guide walks through exactly what you need to do, what it costs, and how long it takes.

What You Need Before You Start

Before filing a single form, have these ready:

• Your Social Security Number or EIN
• Proof of Colorado residency or a way to appoint a registered agent in Colorado
• A chosen business name (must be distinguishable from existing Colorado business names)
• Your contractor license number (from Colorado Department of Regulatory Agencies) or confirmation you don't need one for your scope
• Construction liability insurance quotes
• Business checking account information (optional but recommended before operating)

Understanding whether you legally need a Colorado general contracting license is critical. If you perform construction work that requires a building permit in Colorado, you typically need a license. Work with the Colorado Department of Regulatory Agencies (DORA) to confirm your specific trade requires licensing. Home maintenance or repair work under $5,000 (as of the 2025 threshold, but confirm current limits on the DORA site) may not require licensing in some cases, but this depends on the type of work.

Step 1: Choose Your Business Structure

You have three main options for how to legally form your Colorado general contracting business.

Sole Proprietorship: You operate as yourself. Filing is free and simple, but you have unlimited personal liability if someone is injured on your job site or if a customer sues. Contractors should avoid this unless your work is very small-scale.

Limited Liability Company (LLC): This separates your personal assets from business liability. Most contractors choose this. Filing an LLC in Colorado costs $50, annual reporting costs $25, and you get liability protection. There is no Colorado franchise tax, so your only recurring Secretary of State cost is the $25 annual periodic report.

Corporation: More complex than an LLC. Costs $50 to file, $25 annual reporting. Used less often by contractors but works if you plan to reinvest significant profits in the business. Both C-Corps and S-Corps are available.

For most Colorado general contracting businesses, an LLC is the best choice. It balances liability protection, simplicity, and cost.

Step 2: Reserve or Register Your Business Name

Choose a name that includes an LLC identifier like "LLC," "Limited Liability Company," or "Ltd. Liability Company." The name must be distinguishable from existing business names in Colorado records. Capitalization and punctuation do not make a name unique, so "ABC Contracting Inc" and "abc contracting inc" are treated as the same name.

You have two options:

Reserve the name first (optional): Visit the Colorado Secretary of State name reservation page. Pay $25 to reserve the name for 120 days. This is optional but helpful if you need time to plan before filing.

File your Articles of Organization (creates the LLC immediately): Skip the reservation and file directly. Your name is protected as soon as the Articles are accepted. Go to the Colorado SOS online filing system, select "Articles of Organization for a Limited Liability Company," and submit your chosen name, registered agent information, and business address. Cost: $50. Processing time: real-time for online filings. Your LLC is officially formed once payment is accepted.

Before you finalize the name, search the Colorado business entity database to confirm it is available.

Step 3: Appoint a Registered Agent

Every LLC in Colorado must name a registered agent. This is the person or entity authorized to receive official documents on behalf of your business.

The registered agent must either:

• Be an individual at least 18 years old with a current Colorado driver's license or state ID card (or have a usual place of business in Colorado), OR
• Be another business entity in good standing with Colorado and maintaining a physical office in Colorado

Many contractors act as their own registered agent. If you do, use your Colorado address exactly as it appears on your ID. Some contractors hire a registered agent service (search "Colorado registered agent") for $75 to $150 per year to handle document receipt at a professional address. This is optional but useful if you travel for work or prefer not to receive legal documents at home.

The registered agent address must be a physical street address in Colorado, never a P.O. box, and must be a location where documents can be received during normal business hours.

Step 4: Get Your Contractor License (If Required)

Visit the DORA Licensing Search to see if your specific trade requires a Colorado license. General contractors who perform work requiring building permits typically do need licensing.

If licensing is required, you will need to:

• Meet experience requirements (typically 4 years supervised experience in your trade for most contractor licenses)
• Pass the Colorado general contractor exam
• Submit proof of your experience and education
• Pay the license application fee (confirm the current fee amount on the DORA site, as it varies by trade)
• Provide proof of a surety bond (see Step 5)

Licensing timelines vary from 2 to 8 weeks depending on how quickly you submit all paperwork and whether DORA requests additional information. Plan ahead; you cannot legally solicit jobs as a licensed contractor until your license is issued.

Step 5: Obtain Surety Bond and Insurance

Colorado requires many contractors to post a surety bond as part of their license application. A surety bond protects customers by guaranteeing your work is completed as contracted. Bond amounts vary by contractor type and license; DORA will specify the amount you need.

Cost: Surety bonds typically cost 1 to 3 percent of the bond amount annually. A $50,000 bond might cost $500 to $1,500 per year.

Separately, you absolutely need construction liability insurance. This covers injuries on your job site and property damage. Most contractors carry $500,000 to $2,000,000 in coverage. Get quotes from at least three contractors' insurance providers. Expect to pay $600 to $2,000 per year depending on your coverage limits and claims history.

Step 6: Obtain an EIN and Set Up Tax Registrations

Apply for an Employer Identification Number (EIN) from the IRS using Form SS-4. You can apply online at IRS.gov for free. You get your EIN immediately. This number identifies your business to the IRS and is required if you plan to hire employees.

Next, register for Colorado state income tax and sales tax (if applicable) through the Colorado Department of Revenue.

State Income Tax: Colorado has a flat 4.40 percent income tax rate on business profits. You do not need to register separately; you report this when you file your annual state tax return.

Sales Tax License: If you sell materials or labor to customers (most contractors do), you need a sales tax license from the Colorado Department of Revenue. Obtain one at https://tax.colorado.gov/how-to-apply-for-a-colorado-sales-tax-license. The license is free. Colorado's state sales tax rate is 2.9 percent, but home rule cities may impose additional local sales tax, so check with your city as well.

If you operate in a home rule city (Denver, Colorado Springs, Fort Collins, and many others), you must separately register with that city for local sales tax collection. Contact your city's finance or tax department.

Step 7: Complete Additional Local Registrations

Beyond the state level, check with your county and city:

• County business license: Some Colorado counties require one. Contact your county clerk.
• City business license or permit: Most Colorado cities do not issue a single "general business license," but they may require licensing for specific services (plumbing, electrical, etc.) through DORA. Some cities also require a business development fee or occupancy tax. Check your city's website or building/planning department.
• Zoning compliance: If you operate from a home office or a commercial space, verify the location complies with local zoning rules. Contact your city or county planning department.

Costs Summary for a Colorado General Contracting Business

Item	Cost	Notes
LLC Articles of Organization filing	$50	One-time, filed with Colorado Secretary of State
Annual LLC periodic report	$25/year	Recurring cost, due each year in your anniversary month
Registered agent service (optional)	$75 to $150/year	Only if you do not serve as your own agent
Contractor license application fee	Varies by trade	Check DORA site for your specific license type
Surety bond	1 to 3% of bond amount annually	Required for most Colorado contractor licenses
Liability insurance	$600 to $2,000/year	Non-negotiable for contractors; covers job-site injuries and property damage
Colorado sales tax license	Free	Available at Colorado Department of Revenue website
City/county business registrations	$0 to $500+	Varies widely; call your city or county

Minimum total startup cost: Approximately $2,000 to $5,000, assuming you serve as your own registered agent and do not have licensing barriers. If licensing fees, bonding, and city fees are higher, expect $5,000 to $10,000. This does not include business insurance, equipment, or marketing.

Timeline: How Long Does This Take?

1 to 2 weeks: Finalize your business name, file LLC Articles, and get approved (online filings are immediate).

2 to 4 weeks: Apply for contractor license (if required), arrange surety bond, get liability insurance quotes and bind coverage.

1 to 8 weeks: Wait for your contractor license to be issued by DORA (highly variable depending on application completeness and DORA workload).

Same day to 1 week: Obtain your EIN from the IRS and register for sales tax with Colorado Department of Revenue.

1 to 2 weeks: Complete any local city or county registrations.

Total minimum time: 4 to 10 weeks before you are legally ready to operate and accept your first contract, assuming no licensing delays.

Tips to Avoid Common Mistakes

Do not skip the contractor license research: Operating without a required license is illegal in Colorado and can result in fines, work stoppages, and loss of your right to collect payment for unlicensed work. Confirm DORA's requirements for your specific scope before you start any jobs.

Get insurance before your first job: Do not self-insure or operate without liability coverage. One serious injury or lawsuit can bankrupt an uninsured contractor.

Name your registered agent correctly: If you are the agent, enter your name and ID number exactly as they appear on your Colorado driver's license. Mismatches can delay your filing.

Collect and keep licenses and registrations current: Set a calendar reminder for your annual LLC periodic report due date (your anniversary month plus two months). Missing the deadline by more than two months makes your LLC "Delinquent." The fee is only $25, so pay it on time.

Separate your business and personal finances from day one: Open a business checking account and use it exclusively for business transactions. This protects your personal assets and simplifies taxes. Many contractors operate cash-heavy; record everything regardless.

Do not assume no state license means no city license: Even if DORA says you don't need a state license, your city may require a business development fee or occupancy tax. Ask your city before your first job.

What Comes Next

Once you are licensed and insured, you are legally authorized to perform work and charge customers. Your next steps are operational: marketing your business, building a portfolio, managing job costs, collecting payments, and scaling. Consider consulting with a Colorado CPA or accountant about entity structure if you have specific tax questions, and work with a Colorado contractor attorney if you have concerns about contract terms or liability.

The Colorado Small Business Development Center (SBDC) Network also offers free business consulting and can help with business planning, financing, and operations.

Disclaimer

This article is informational only and does not constitute legal, tax, or business advice. Colorado business formation rules, licensing requirements, and fee structures change periodically. Always verify current requirements directly with the Colorado Secretary of State, the Colorado Department of Regulatory Agencies, and the Colorado Department of Revenue before starting your business. If you have complex licensing or liability concerns, consult a Colorado-licensed attorney or accountant.