Colorado Business Taxes Explained: What Every Small Business Owner Needs to Know
Colorado’s flat 4.4% tax rate is a genuine simplification compared to states with income brackets. It is also only one piece of what a Colorado business owes. Sales tax, employer payroll taxes, and a paid-leave program called FAMLI round out the full picture, and each carries a distinct registration, deadline, and rate structure.
Here is the complete tax and payroll picture for a Colorado small business, tied together in one reference.
Key Takeaways
• Colorado applies a flat 4.4% rate to individual (pass-through) and corporate income alike.
• No franchise tax exists, but LLCs and corporations still owe the annual Periodic Report, a filing fee rather than a tax.
• A business selling taxable goods or services needs a state sales tax license, and possibly separate registration with a home-rule city.
• An employer must register for Colorado unemployment insurance and FAMLI, the state’s paid family and medical leave insurance program.
• Federal self-employment tax applies regardless of Colorado’s state tax structure, and it is a separate obligation from anything covered here.
Colorado’s Flat Income Tax Rate
Colorado applies a single 4.4% rate to individual income, including pass-through income from an LLC or S-corporation, and to C-corporation income at the entity level. No brackets and no phase-outs apply; the same rate covers a small side business and a large corporation alike.
The rate has moved before: Colorado reduced it from 4.55% to 4.4% following a 2022 ballot measure, and the state’s Taxpayer’s Bill of Rights (TABOR) can trigger refunds or temporary adjustments tied to state revenue collections in strong years. Confirm the current-year rate on the Colorado Department of Revenue’s site, since TABOR-related mechanics can shift the effective rate from year to year.
Colorado Sales and Use Tax
A business selling taxable goods or services in Colorado needs a state sales tax license from the Department of Revenue, and possibly a separate registration with a home-rule city like Denver, Boulder, Colorado Springs, or Aurora, each of which collects local sales tax independently of the state. The two-layer system is one of the most distinctly Colorado parts of running a business here. Full detail lives in Colorado Sales Tax License: State vs. Home-Rule City Requirements Explained.
Colorado Employer Payroll Taxes
An employer hiring in Colorado registers for state wage withholding through MyBizColorado, which handles income tax withheld from employee paychecks and remitted to the state. A separate registration covers unemployment insurance, administered by the Colorado Department of Labor and Employment. New employers commonly start around a 3.05% introductory rate (confirm the current figure), applied to a taxable wage base rising periodically; the wage base reached $30,600 for 2026 (verify).
FAMLI: Colorado’s Paid Family and Medical Leave Insurance Program
FAMLI is Colorado’s state-run paid family and medical leave insurance program, funded through payroll premiums split between employer and employee. Any business with at least one qualifying Colorado employee must register through the My FAMLI+ Employer portal.
The premium structure depends on employer size. A business with 1 to 9 employees only needs to remit the employee’s share, 0.44% of wages, which can come straight out of employee paychecks with no employer contribution required. A business with 10 or more employees must also contribute an equal 0.44% share, bringing the total premium to 0.88% of wages (confirm the current-year rate on the FAMLI Division site, since this figure adjusts periodically). Premiums apply to wages up to the federal Social Security wage cap.
Every employer, including one with an approved private plan instead of the state plan, must update its total employee headcount by February 28 each year. A missed deadline causes the FAMLI Division to assume 10 or more employees by default, applying the full 0.88% premium rate regardless of actual headcount.
Self-Employment Tax (Federal, Not Colorado-Specific)
Self-employment tax funds Social Security and Medicare for a sole proprietor, partner, or LLC member reporting business income on a personal return. The tax applies at the federal level, identically in every state, so it stays separate from anything Colorado charges. A business owner weighing an S-corp election to reduce self-employment tax exposure should treat the decision as a federal payroll question first, layered on top of Colorado’s flat 4.4% rate rather than changed by it.
Colorado Estimated Tax Payments
A business owner or pass-through entity owner expecting to owe Colorado income tax beyond what gets withheld from a paycheck generally needs to make quarterly estimated tax payments. Confirm current thresholds and due dates directly with the Colorado Department of Revenue, since a business’s specific filing situation (entity type, income level, withholding already in place) affects whether estimated payments are required.
Colorado Tax Credits and Incentives Worth Knowing About
The Colorado Office of Economic Development and International Trade (OEDIT) administers more than 100 funding and incentive programs. A few worth investigating directly on OEDIT’s site include the Job Growth Incentive Tax Credit (tied to net new job creation), the Advanced Industries Investment Tax Credit (aimed at early-stage advanced-industry businesses), and the Enterprise Zone Program (supporting business activity in designated economically distressed areas). Eligibility rules and current program status change, so confirm directly with OEDIT before assuming a program applies to a specific business.
Putting It All Together: A Simple Compliance Calendar
• Periodic Report: due during a five-month window built around the entity’s anniversary month, every year.
• Sales tax license renewal: every two years, expiring December 31 of odd-numbered years.
• FAMLI headcount update: due February 28 every year, for every registered employer.
• Estimated income tax payments: quarterly, if applicable to the business’s situation.
• Annual state and federal income tax filing: due on the standard federal deadline unless an extension applies.
Frequently Asked Questions
What is Colorado’s business tax rate? A flat 4.4% applies to individual (pass-through) and corporate income alike, with no brackets.
Does Colorado have a franchise tax? No. LLCs and corporations still owe the annual Periodic Report, a $25 filing fee, which functions differently from a tax on revenue or capital.
Do all employers need to register for FAMLI? Yes, once a business has at least one qualifying Colorado employee, registration through the My FAMLI+ Employer portal is required, even for an employer using an approved private plan instead of the state plan.
How much is the FAMLI premium? 0.88% of wages total for an employer with 10 or more employees, split 0.44% employer and 0.44% employee. An employer with 1 to 9 employees remits only the 0.44% employee share.
Do LLCs pay Colorado corporate tax? Only if taxed as a C-corporation. A default LLC passes income through to the owner’s personal return, taxed at the same flat 4.4% rate as any individual income.
What’s the difference between the Periodic Report and a tax filing? The Periodic Report is a registry maintenance filing with the Secretary of State, unrelated to income, sales, or payroll tax. It confirms the entity’s registered agent and address information and carries a separate fee from any tax obligation.
Do sole proprietors pay Colorado business taxes differently than LLCs? Not on income tax; a sole proprietor and a default LLC each pass income through to the owner’s personal return at the same 4.4% rate. Sole proprietors skip the Periodic Report entirely, since they file nothing with the Secretary of State.
Are there Colorado tax credits for small businesses? Yes, several, administered through OEDIT, including job-growth and investment-focused credits. Eligibility and availability change, so confirm current programs directly with OEDIT.
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Sources
• Colorado Department of Revenue, Taxation Division
• Colorado Department of Labor and Employment, Unemployment Insurance Premiums
• Colorado Office of Economic Development and International Trade (OEDIT)
• OEDIT Business Funding and Incentives
This article is for general information only and is not legal, tax, or financial advice. Confirm current requirements with the relevant Colorado agency or a qualified professional before acting.