Key Takeaways
- $50 Articles of Incorporation filing fee (Online (mybiz.colorado.gov)) paid to the Colorado Secretary of State
- Minimum 1 director required (C.R.S. § 7-108-103)
- Periodic Report (Online (mybiz.colorado.gov)) due within during the anniversary month of formation, with a two-month window that opens the first day of that month, $25 fee; $50 delinquency fee, then administrative dissolution after the report is delinquent for the statutory cure period late penalty
- Flat 4.4% corporate income tax on Colorado income; no franchise tax and no authorized-share tax; $25 Periodic Report each year in the anniversary month
- Registered Agent with a physical Colorado street address required
- No publication requirement
- S-Corp election available via IRS Form 2553 within 75 days of formation; Colorado adds no separate S-Corp entity tax
- Same-day filing available through LLC Attorney at no markup on state fees
Incorporating in Colorado means filing Articles of Incorporation with the Colorado Secretary of State at mybiz.colorado.gov, paying a $50 fee, seating at least one director, and keeping up two recurring obligations: a $25 Periodic Report each year in your formation anniversary month and the state's flat 4.4% corporate income tax. There is no franchise tax and no tax on authorized shares, and because online filings approve in real time, Colorado charges nothing extra for speed. This guide walks through every step and cost of forming a Colorado C-Corporation, with same-day online filing available through LLC Attorney starting at $49.
C-Corp vs LLC in Colorado
Most first-time business owners in Colorado start with an LLC. A Colorado corporation earns its keep in narrower situations — when you intend to raise venture capital, grant employee stock options, or build toward an acquisition or IPO, where the C-Corp share structure is a requirement rather than a preference.
Choose a Colorado corporation when:
- You plan to raise venture capital or institutional investment. VC firms, angels, and most institutional investors require a C-Corp structure before they write a check. Preferred stock, convertible notes, SAFEs, and board governance by class are native to corporations, not LLCs.
- You want to issue stock options to employees (ISOs). Corporations issue stock; LLCs issue membership interests. ISO and NSO option plans are available to corporations but not to LLCs.
- You expect to eventually go public or sell to a public company. Public markets operate on corporate stock mechanics.
- You are in a regulated industry where corporate structure is required or expected by licensing boards, government contracts, or institutional counterparties.
Stick with an LLC when:
- You are a small business with one or a few owners who will not need institutional investment.
- Pass-through taxation without payroll complexity is the priority.
- You do not need stock option plans or institutional investment mechanics.
Why and when to incorporate in Delaware vs your home state
Delaware is the default for startups on a venture track. Institutional investors expect it, term sheets assume it, and the Court of Chancery resolves corporate disputes faster than any general trial court. If you are raising a priced round or structuring for QSBS eligibility, incorporate in Delaware.
If you are not raising outside capital, Colorado is usually the better choice. A Delaware corporation operating in Colorado still has to register as a foreign corporation there, pay Colorado fees, and file a Delaware franchise tax return each March 1. That is duplicate overhead with no benefit for a business that will not seek institutional investment.
What's Unique About Corporations in Colorado?
Colorado is one of the easiest and cheapest states in which to stand up a corporation: filing is online-only through mybiz.colorado.gov, the Secretary of State approves Articles of Incorporation in real time, and there is no franchise tax, no authorized-share tax, and no expedite fee because every online filing is already instant. What catches founders off guard is vocabulary and timing rather than cost. Colorado calls the yearly compliance filing a 'Periodic Report,' not an 'Annual Report,' and pegs its deadline to the corporation's formation anniversary month instead of a fixed statewide date.
Key Colorado-specific requirements:
- Articles of Incorporation (not "Articles of Organization" — that is the LLC filing document)
- Minimum of one director (C.R.S. § 7-108-103); bylaws may fix the number or set a minimum-maximum range, and directors need not be Colorado residents
- Flat 4.4% corporate income tax on Colorado income; no franchise tax and no authorized-share tax; $25 Periodic Report each year in the anniversary month
- Periodic Report ($25) is due in your formation anniversary month, not on a fixed calendar date — set a recurring reminder so you do not trigger the $50 delinquency fee
- Home-rule sales tax — many Colorado cities administer and collect their own local sales tax separately from the state, so a multi-city corporation may register in several jurisdictions
Selecting a Name for Your Colorado Corporation
Your corporation's name must comply with Colorado naming requirements:
- Must include "Corporation," "Incorporated," "Inc.," "Corp.," or another Colorado-approved designator (C.R.S. § 7-90-601)
- Must be distinguishable from all existing Colorado entities in the Colorado business database search
- A Colorado corporate name must carry one of the recognized designators (Corporation, Incorporated, Company, Limited, or an abbreviation such as Corp., Inc., Co., or Ltd.) and must be distinguishable on the record from every entity already in the Secretary of State database; names suggesting a bank, insurer, or governmental body draw extra review
- Names implying government affiliation or banking activity are restricted
Search the Colorado business database search at mybiz.colorado.gov before filing. Your name search is not a reservation — the name can be registered by another filer while you prepare your Articles of Incorporation.
Name reservation: file a name reservation with the Colorado Secretary of State, $25 fee, holding the name for 120 days. Recommended if your paperwork takes more than a few days to prepare.
Directors, Officers, and Shareholders in a Colorado Corporation
A Colorado corporation has three distinct roles:
Shareholders own the corporation. They hold stock and vote on major decisions — electing directors, approving mergers, authorizing major asset sales. Shareholders do not manage day-to-day operations.
Directors govern the corporation through a Board of Directors. They set strategic direction, authorize major transactions, and oversee management. Colorado's director requirements: Colorado requires a board of at least one director (C.R.S. § 7-108-103); the exact number is fixed in or determined under the bylaws, which may set a fixed size or a minimum-to-maximum range. Directors need not be Colorado residents, U.S. citizens, or shareholders, and the Articles of Incorporation do not have to name them. Officers are governed by C.R.S. § 7-108-301: the corporation must have at least one officer charged with keeping the minute book and records, and any individual may hold more than one office.
Officers (CEO, CFO, Secretary, etc.) manage day-to-day operations. Officers are appointed by the Board of Directors. Colorado requires whatever officers the bylaws or board designate, with at least one officer responsible for preparing and maintaining corporate records (C.R.S. § 7-108-301); one person may hold every office. One person can be the sole director and simultaneously hold every officer role, which is the ordinary structure for a single-founder Colorado corporation.
Designating a Registered Agent
Every Colorado corporation must designate a Registered Agent — a person or entity with a physical Colorado street address who receives legal notices, lawsuits, and official state correspondence on behalf of your corporation.
Every Colorado corporation must continuously maintain a registered agent with a physical Colorado street address (a P.O. box alone does not qualify) where the agent is available during normal business hours to accept service of process and state mail. Under changes effective July 1, 2025, an individual agent must have a primary residence or usual place of business in Colorado and confirm identity with a valid Colorado driver's license or state ID; a business entity acting as agent must itself be authorized to transact business in Colorado.
If the Colorado Secretary of State cannot deliver legal notices to your Registered Agent, Colorado can administratively administratively dissolve your corporation. LLC Attorney's Colorado Registered Agent service is $125/year.
Colorado Corporation Costs and Compliance
How to Form a Corporation in Colorado
If You Do It Yourself
Step 1 — Choose a corporate name that complies with Colorado's requirements.
Your corporate name must be distinguishable from all existing Colorado entities and include an approved corporate designator ("Inc.," "Corp.," "Corporation," "Incorporated," or as specified in C.R.S. § 7-90-601). Search the Colorado business database search at mybiz.colorado.gov before preparing any documents. Run your name through the Colorado database at mybiz.colorado.gov to confirm it is distinguishable on the record; availability there does not establish trademark rights, so clear the name against the USPTO database separately before you brand around it.
Step 2 — Reserve your corporate name (recommended).
File a name reservation with the Colorado Secretary of State, $25 fee, good for 120 days. If you are not filing immediately, this prevents another entity from taking your name while you prepare documents.
Step 3 — Decide your director structure before opening the formation form.
Colorado requires 1 director at formation. Decide your board size before you file. A solo founder can run a one-director board indefinitely under Colorado law; companies that expect outside investment usually size the board for future independent or investor seats in the bylaws so they avoid amending governance documents mid-raise. Colorado lets the bylaws state a range, which is the cleanest way to keep flexibility without re-filing. Write down your director names and Colorado addresses before you open the form — most state portals cannot save a partially completed filing.
Step 4 — Designate your Registered Agent.
Every Colorado corporation must have a Registered Agent with a physical Colorado street address. P.O. boxes are not accepted. Most Colorado corporations use a commercial registered agent to keep a founder's home address off the public mybiz.colorado.gov record. LLC Attorney can serve as your Colorado Registered Agent and route every state and legal notice to your client portal.
Step 5 — Complete the Articles of Incorporation (Online (mybiz.colorado.gov)).
Go to sos.state.co.us and use the current version of the Articles of Incorporation. Always file directly through the Colorado Secretary of State — outdated forms are rejected without refund. Complete it with:
- Your exact corporate name including designator
- Your Registered Agent — full legal name and physical Colorado street address
- Your authorized share structure — state a single class of common stock with a round authorized number such as 1,000,000 shares; Colorado does not tax authorized shares, so the count is a cap-table decision rather than a tax decision
- Director names and addresses
- Incorporator signature (the person submitting the form; need not be a director or shareholder)
- The number of shares the corporation is authorized to issue (Colorado collects this but does not use it to compute any tax)
Step 6 — File the Articles of Incorporation and pay the $50 fee.
File online at mybiz.colorado.gov or by mail to the Colorado Secretary of State in Denver. Online processing is immediate when filed online at mybiz.colorado.gov under normal volume.
Step 7 — Wait for your approved Articles of Incorporation.
Your corporation does not legally exist during the review period. You cannot open bank accounts, sign contracts as the corporation, or issue stock until the Colorado Secretary of State approves your filing. Standard processing is immediate when filed online at mybiz.colorado.gov; still immediate online; only mailed paper filings (rarely accepted) take longer during peak filing season. Keep your approved Articles of Incorporation — every bank, licensing board, and counterparty will request it.
Step 8 — Hold your organizational meeting and adopt bylaws.
After approval, your Board of Directors must hold an organizational meeting (or sign a written consent in lieu of meeting) to adopt bylaws, elect officers, authorize the bank account, authorize stock issuance, and set the fiscal year. Colorado does not require bylaws to be filed with the Secretary of State — keep them with your corporate records. Colorado bylaws are adopted by the incorporator or the initial board under C.R.S. § 7-102-106 and are not filed with the state; the Colorado Business Corporation Act supplies default governance rules only where the bylaws are silent, so write them to fix board size, officer roles, and meeting mechanics deliberately. A generic template may omit Colorado-specific provisions and may not align with your share structure.
Step 9 — Issue stock to founders.
Authorize and issue shares to founders immediately after your organizational meeting. Document the issuance in your stock ledger and issue stock certificates (or maintain uncertificated share records). Each founder's share count and issuance price must be documented. Because Colorado levies no tax on authorized or issued shares, you can set a generous authorized number up front and issue only what founders need now, leaving headroom for an option pool and later financing without a fee-bearing amendment. The only real constraint is matching your share structure to your actual ownership split and any investor expectations.
Step 10 — File your initial Periodic Report (Online (mybiz.colorado.gov)) within during the anniversary month of formation, with a two-month window that opens the first day of that month.
After your Articles of Incorporation is approved, you have during the anniversary month of formation, with a two-month window that opens the first day of that month to file Online (mybiz.colorado.gov) with the Colorado Secretary of State. This filing confirms your Registered Agent address, principal office address, and director and officer contact information. Filing fee: $25. Missing the deadline triggers a $50 delinquency fee, then administrative dissolution after the report is delinquent for the statutory cure period penalty.
Step 11 — Apply for your federal EIN.
Your corporation needs an EIN to open a bank account, hire employees, and handle tax filings. Apply at irs.gov/ein. Free, no government filing fee. Available Monday through Friday, 7 a.m. to 10 p.m. Eastern. 15-minute inactivity timeout — have all information ready before starting. International incorporators without a U.S. SSN or ITIN must apply by phone (IRS Form SS-4, 267-941-1099).
Step 12 — Open a corporate bank account.
Required documents: your approved Articles of Incorporation, your EIN confirmation letter (IRS Form CP 575 or SS-4 approval), your adopted bylaws, a board resolution authorizing the account, and personal ID of authorized signers. Call ahead — bank requirements for corporations are more involved than for LLCs.
Step 13 — Register for Colorado state taxes.
Your federal EIN does not automatically register you with Colorado state agencies. Depending on your business type:
- Colorado sales and use tax (Colorado Department of Revenue, if you sell taxable goods or services) — tax.colorado.gov
- Colorado employer payroll taxes (Colorado Department of Labor and Employment, if hiring Colorado employees) — cdle.colorado.gov
- Colorado sales and use tax (Department of Revenue) — required if the corporation sells taxable goods or certain services; Colorado is a home-rule state, so many cities administer and collect their own local sales tax separately
Step 14 — Pay your Colorado annual tax.
Colorado does not assess a franchise tax, so there is no minimum entity-level levy to budget for. Instead, a C-Corporation pays the 4.4% corporate income tax on its Colorado taxable income using Form DR 0112, filed with the Colorado Department of Revenue. For a calendar-year corporation the return is due the 15th day of the fifth month after the close of the tax year — May 15; Colorado grants an automatic six-month extension of time to file (to November 15 for calendar-year filers), but the tax itself must be paid by the original due date to avoid interest. File and pay through Revenue Online, and use Form DR 0112EP if your projected tax requires quarterly estimated payments.
Step 15 — Decide whether to elect S-Corp tax treatment.
C-Corporation income is taxed twice: once at the corporate level (federal rate currently 21%), and again when distributed to shareholders as dividends. An S-Corp election converts the corporation to pass-through taxation. S-Corp election is available for Colorado corporations that meet IRS eligibility: 100 or fewer shareholders, all U.S. citizens or residents, only one class of stock, and no institutional or foreign shareholders. File IRS Form 2553 within 75 days of formation. The election is made with the IRS — it does not require any Colorado filing. Colorado conforms to the federal S-Corp election and does not require a separate state-level S election. Once the IRS accepts Form 2553, the corporation is treated as an S-Corp for Colorado purposes, files the composite/pass-through return on Form DR 0106, and the income flows to shareholders who pay Colorado's flat 4.4% individual income tax. There is no Colorado-specific S-Corp franchise or net-worth tax. Reserve the election for a closely held, profitable operating company, since institutional investors, multiple share classes, and non-resident or entity shareholders all break S-Corp eligibility.
Step 16 — Set annual compliance reminders.
Colorado corporations must file and pay on a recurring basis:
- Periodic Report (Online (mybiz.colorado.gov)): Annually, in the anniversary month, $25 fee — $50 delinquency fee, then administrative dissolution after the report is delinquent for the statutory cure period if missed
- Periodic Report: $25, due in your anniversary month each year at mybiz.colorado.gov; corporate income tax: 4.4% on Form DR 0112 to the Department of Revenue
Missing these filings puts your corporation in bad standing with the Colorado Secretary of State and Colorado Department of Revenue. Suspension means you cannot file documents, defend lawsuits, or do business in Colorado. If you would rather not manage this process, the service handles Colorado corporation formation starting at $49.
If LLC Attorney Does It for You
- Submit your information at llcattorney.com — corporate name, director structure, authorized shares, Registered Agent preference, fiscal year, and target formation date. No forms to find or download.
- LLC Attorney files your Articles of Incorporation with the Colorado Secretary of State, drafts your bylaws, handles your organizational meeting consent, issues your stock ledger documentation, applies for your EIN, and covers same-day filing if needed. Your Registered Agent designation and initial Periodic Report are included.
- Receive your approved Articles of Incorporation, bylaws, organizational consent, stock documentation, and EIN confirmation through your LLC Attorney client portal. Annual compliance reminders are included so you never miss a Online (mybiz.colorado.gov) deadline or annual tax payment.
S-Corp Election for Colorado Corporations — What You Need to Know
An S-Corp election is not a separate entity — it is a federal tax election made by an existing corporation. Your Colorado corporation remains a Colorado corporation; you are only changing how the IRS taxes it.
The S-Corp tax advantage: a C-Corp pays 21% federal corporate income tax on net income, and shareholders pay income tax again on dividends. An S-Corp passes income directly to shareholders' personal returns, skipping the corporate-level tax. For owner-operated businesses with consistent profitability above roughly $40,000/year, the S-Corp election typically produces material tax savings.
S-Corp payroll requirement: if you elect S-Corp status and work in the business, you must pay yourself a "reasonable salary" subject to payroll taxes. The savings come from income above that salary, which passes through without payroll tax. Skip the salary and the IRS can reclassify your distributions as wages and assess back payroll taxes plus penalties.
Eligibility requirements:
- 100 or fewer shareholders
- All shareholders must be U.S. citizens or permanent residents
- Only one class of stock (identical distribution and liquidation rights)
- No institutional shareholders, partnerships, or non-resident alien shareholders
Colorado treatment of S-Corps: Colorado conforms to the federal S-Corp election and does not require a separate state-level S election. Once the IRS accepts Form 2553, the corporation is treated as an S-Corp for Colorado purposes, files the composite/pass-through return on Form DR 0106, and the income flows to shareholders who pay Colorado's flat 4.4% individual income tax. There is no Colorado-specific S-Corp franchise or net-worth tax. Reserve the election for a closely held, profitable operating company, since institutional investors, multiple share classes, and non-resident or entity shareholders all break S-Corp eligibility.
Filing deadline: IRS Form 2553 must be filed within 75 days of formation, or by March 15 of the tax year for which you want the election effective. Late elections are sometimes accepted with a written explanation of reasonable cause.
When Should You Consult an Attorney for Your Colorado Corporation?
LLC Attorney provides on-demand attorney consultations for a flat rate per 30-minute session — no retainer required. Corporation formation benefits from attorney guidance more than most entity types because of share structure, bylaw complexity, and S-Corp election timing. Common scenarios:
- Multiple founders or investors: share structure decisions made at formation (authorized shares, classes, par value) affect every future financing round and exit. A misstructured cap table is expensive to unwind.
- S-Corp election analysis: whether to elect depends on projected net income, payroll requirements, and state-level S-Corp recognition. The payroll requirement catches founders off guard.
- High-liability industry: regulated industries may have specific corporate structure requirements from licensing boards or insurance carriers.
- Raising capital: if you plan to raise institutional capital, your share structure, option pool, and Delaware vs. home-state decision should be reviewed before you file.
- Colorado-specific wrinkles: Colorado may have corporate law provisions a generic national template does not cover correctly.
What You Actually Get When You Incorporate in Colorado with LLC Attorney
A Colorado corporation that exists only as a state filing is not a working corporation. The Secretary of State creates the entity in seconds, but that filing does not produce the bylaws, board consents, and stock records that actually make the corporation operate and hold its liability shield. A "$0 filing" that skips those leaves you with an entity that looks formed but fails its first real test — a bank account, a financing, or a dispute — which in Colorado is exactly when the missing paperwork surfaces.
Included with LLC Attorney corporation formation, starting at $50:
- Same-day or 24-hour Colorado filing at no markup on the state fee. Most services charge extra to expedite.
- Attorney-drafted bylaws, initial board consent, and organizational minutes — customized, not auto-generated templates.
- Initial stock issuance and cap-table setup, so your ownership is documented correctly from day one.
- Federal EIN, obtained for you.
- Colorado Registered Agent service at $125/year, included to keep you in good standing.
- S-Corp election guidance when pass-through tax treatment is the right call for your situation.
- Access to attorney-trained Business Success Advisors at no charge, plus optional flat-fee attorney consultations (no retainer).
Because Colorado makes the state filing cheap and instant, the real value is in the documents that make the corporation function and stay compliant — bylaws, organizational consents, a clean cap table, and a tracked anniversary-month Periodic Report — all of which are included here.
Starting Your Colorado Corporation with LLC Attorney
Colorado's corporate formation requirements are simple to file but easy to mismanage — the anniversary-month Periodic Report timing, board sizing in the bylaws, and home-rule local sales-tax registration across Colorado cities. Getting your directors, share structure, bylaws, and initial compliance filings right at formation prevents expensive corrections later.
The service handles Colorado corporation formation starting at $49. Same-day filing is available at no markup on state fees. On-demand attorney consultations in 30-minute increments — no retainer — cover bylaws drafting, S-Corp election analysis, Colorado board structuring, S-Corp eligibility review, and multi-city sales-tax registration, and annual tax planning. See our full pricing for all service tiers.
Frequently Asked Questions
Colorado processes corporate filings instantly when you submit online at mybiz.colorado.gov — your Articles of Incorporation are approved in real time, so there is no separate expedited tier and no expedite fee. Colorado does not encourage paper filing; the online portal is the fastest, cheapest, and most reliable route. LLC Attorney prepares and files your Articles online so the approval comes back the same day.
A C-Corp and an S-Corp are the same Colorado corporation — the difference is federal tax treatment only. A C-Corp pays corporate income tax at the entity level (21% federal rate), and shareholders pay personal income tax again on dividends. An S-Corp elects pass-through taxation — income flows to shareholders' personal returns without corporate-level tax. The election is made with the IRS via Form 2553 and has no impact on your Colorado formation documents. Because Colorado simply follows the federal S election, the analysis is mostly about whether your shareholder profile and profitability make the election worthwhile, not about extra Colorado paperwork.
Yes. Colorado expressly allows a single individual to be the sole shareholder, the only director, and the holder of every officer position at once. This is the standard setup for a solo-founder C-Corp. You still have to keep up the formalities that preserve the liability shield: adopt bylaws, document the organizational consent, issue your stock, hold or waive annual meetings, and keep corporate funds strictly separate from personal accounts.
Colorado has no corporate franchise tax. A Colorado C-Corporation pays the state's flat 4.4% corporate income tax on income apportioned to Colorado, reported on Form DR 0112. There is no tax on authorized or issued shares, and the only standing Secretary of State charge is the $25 Periodic Report. At the federal level a C-Corp pays the 21% corporate income tax unless it makes an S-Corp election. Temporary rate cuts tied to TABOR surpluses have dropped the effective rate below 4.4% in some recent years.
Colorado corporations file a Periodic Report with the Secretary of State once a year, due during the month the corporation was formed (the filing window opens on the first day of that month). The fee is $25, filed online at mybiz.colorado.gov in a few minutes. Colorado uses 'Periodic Report' rather than 'Annual Report,' and the deadline tracks your formation anniversary rather than a fixed calendar date. Miss the window and the state adds a $50 delinquency fee; leave it unfiled and the corporation is moved to noncompliant and ultimately administratively dissolved.
Colorado does not require corporations to file bylaws with the Secretary of State. However, bylaws are a legal requirement for corporate governance — they define how your board operates, how shareholder meetings work, how officers are appointed, and how major decisions are made. A corporation without bylaws is technically non-compliant and lacks the foundational document that governs all major corporate decisions. Every bank, investor, and serious counterparty will request your bylaws.
Colorado has no franchise tax, so there is no franchise-tax late penalty. The recurring deadline that trips up Colorado corporations is the Periodic Report: miss your anniversary-month window and the Secretary of State adds a $50 delinquency fee and flags the entity as noncompliant. If the report stays unfiled, the state administratively dissolves the corporation, which loses good standing and the authority to sue, raise capital, or sign enforceable contracts until it is reinstated and the back fees are paid. Unpaid corporate income tax separately accrues interest and penalties with the Department of Revenue.
Yes. Colorado permits a corporation to convert into an LLC by filing Articles of Conversion (online at mybiz.colorado.gov) along with the statement that creates the resulting LLC. Conversion is a taxable event federally and can trigger gain recognition on appreciated assets, so model the tax consequences with a CPA before you convert; depending on basis and assets it is sometimes cleaner to dissolve and re-form. The Colorado filing itself is inexpensive, but the federal tax treatment is where the real cost decision lives.
If Colorado is unable to deliver legal notices to your Registered Agent, the state can administratively administratively dissolve your corporation. This can happen without direct notice to you. A professional Registered Agent service ensures a qualified person is available during business hours at a physical Colorado address to receive any legal documents on your behalf.