Key Takeaways
- Colorado taxes LLC pass-through income at Flat 4.40% on federal taxable income
- Colorado imposes no separate entity-level franchise tax on standard LLCs
- Sales Tax: 2.90% (combined: up to over 11.00%, averaging around 7.89% combined (e.g., roughly 9.15% in Denver))
- Periodic Report due During a five-month filing window centered on the LLC's anniversary month — opening two months before and closing two months after, $25 (raised from $10 effective July 1, 2024) fee
- Federal self-employment tax of 15.3% applies to net LLC profit regardless of state
- Colorado recognizes the federal S-corp election automatically with no separate state form. S-corps can additionally elect the SALT Parity Act's Pass-Through Entity Tax at the 4.40% rate as a SALT-cap workaround.
- Same-day formation and compliance filing available through LLC Attorney at no markup on state fees
Colorado keeps its baseline LLC tax structure simple — a flat 4.40% income tax, no franchise tax, and a $25 Periodic Report that's one of the cheaper recurring filings in the country. The complexity shows up elsewhere: roughly 70 home-rule cities (including Denver and Boulder) administer their own sales tax separately from the state, and the 2026 unemployment insurance wage base just jumped sharply from $23,800 to $30,600.
This guide covers exactly what a Colorado LLC owes in 2026 — state and federal tax obligations, the Periodic Report's anniversary-based filing window and its 'Delinquent' status trap, home-rule city sales tax registration, and when an S-Corp election is worth the added payroll complexity.
Colorado Personal Income Tax on LLC Profit
By default, a Colorado LLC is a pass-through entity — the LLC itself doesn't pay federal income tax. Profit flows through to the owners' personal returns and is taxed at Colorado's flat 4.40% rate, with no brackets to plan around, though the exact rate can shift slightly year to year depending on whether TABOR revenue triggers reduce it.
Colorado's rate: Flat 4.40% on federal taxable income
Colorado's flat rate can drop temporarily under the state's TABOR (Taxpayer's Bill of Rights) law when state revenue exceeds its constitutional cap — it fell to 4.25% for tax year 2024 before reverting to the 4.40% statutory baseline. Because the exact rate for a given tax year isn't finalized until late in that year, always confirm the current figure before filing. Colorado has no local income taxes anywhere in the state.
Does Colorado Charge an Entity-Level Franchise Tax?
Colorado has no franchise tax and no minimum or net-worth-based tax on LLCs. A default pass-through LLC owes no entity-level state tax at all — the only recurring state-filing obligation is the $25 Periodic Report described below. An LLC that elects C-corp taxation instead pays Colorado's flat 4.40% corporate income tax. Colorado recognizes the federal S-corp election automatically with no separate state-level surtax beyond the optional SALT Parity Act election available to all pass-through entities.
Colorado Sales Tax
Colorado's 2.90% state rate is one of the lowest in the country, but combined rates can exceed 11.00% once county, city, and special-district taxes stack on top. Colorado's home-rule city system is a genuine operational complication: roughly 70 municipalities, including Denver, Boulder, and Colorado Springs, administer their own sales tax independently of the state, meaning a business selling in those cities may need to register and file directly with the city in addition to the state's SUTS portal — one of the more complex local sales tax systems in the country for multi-location retailers.
- State rate: 2.90%, combined: up to over 11.00%, averaging around 7.89% combined (e.g., roughly 9.15% in Denver)
- Registration: Sales & Use Tax System (SUTS) registration, plus separate home-rule city registration where applicable, No fee for the state registration fee with the Colorado Department of Revenue (Sales & Use Tax System / SUTS)
- The Department of Revenue assigns your state filing frequency based on collection volume; home-rule cities set their own separate filing schedules for their locally administered tax.
Colorado Annual Report Requirement
Colorado requires every LLC to file Periodic Report with the Colorado Secretary of State, due During a five-month filing window centered on the LLC's anniversary month — opening two months before and closing two months after. Filing fee: $25 (raised from $10 effective July 1, 2024).
If the Periodic Report isn't filed within 60 days after the deadline, the LLC becomes 'Delinquent' and can no longer file a standard Periodic Report — instead requiring a Statement Curing Delinquency ($100 fee). After 3 or more years delinquent, the Secretary of State may file a Statement of Dissolution of Delinquent Entity, formally ending the LLC's existence.
Reinstating a dissolved Colorado LLC requires filing Articles of Reinstatement for a $100 fee; a merely delinquent (not yet dissolved) LLC instead files the $100 Statement Curing Delinquency to return to good standing.
Federal Self-Employment Tax and How Your Colorado LLC Is Classified
Regardless of which state you're in, LLC owners who materially participate in the business owe federal self-employment tax — 15.3% on net profit, covering Social Security (up to the $184,500 (2026) wage base) and Medicare (no cap).
Single-Member LLCs
A single-member Colorado LLC defaults to a disregarded entity for federal tax purposes — you report income and expenses on Schedule C of your personal Form 1040 and compute self-employment tax on Schedule SE. Colorado adds its flat 4.40% income tax on top, with the same $25 Periodic Report regardless of member count.
Multi-Member LLCs
A multi-member Colorado LLC defaults to partnership taxation, filing Form 1065 and issuing each member a Schedule K-1. Colorado has no separate filing consequence tied to member count — both structures owe the identical $25 Periodic Report on the same anniversary-based schedule.
Should Your Colorado LLC Elect S-Corp Taxation?
An S-Corp election lets you split LLC profit into a reasonable salary (payroll-taxed) and shareholder distributions (not subject to self-employment tax), once the business is consistently profitable enough to justify the added payroll complexity.
Colorado's treatment: Colorado recognizes the federal S-corp election automatically with no separate state form. S-corps can additionally elect the SALT Parity Act's Pass-Through Entity Tax at the 4.40% rate as a SALT-cap workaround.
With Colorado's flat 4.40% rate, S-Corp election savings follow the standard federal self-employment-tax logic with no added state-level surtax to model. The SALT Parity Act's elective PTET is the notable state-specific wrinkle worth flagging for higher-income owners who itemize federally, since it can stack with an S-corp election.
Colorado LLC Tax Costs at a Glance
How to Handle Your Colorado LLC's Taxes
If You Do It Yourself
Step 1 — Get your federal EIN before anything else.
Apply for your EIN for free directly at irs.gov — a purely federal application with no Colorado-specific step.
Step 2 — Confirm your default federal tax classification.
A single-member LLC defaults to a disregarded entity (Schedule C); a multi-member LLC defaults to partnership taxation (Form 1065 plus Schedule K-1 for each member). Neither requires a separate election — this is automatic unless you file Form 8832 or Form 2553 to change it.
Step 3 — Register with the Colorado Department of Revenue if required for state income tax withholding or estimated payments.
Colorado's flat rate can drop temporarily under the state's TABOR (Taxpayer's Bill of Rights) law when state revenue exceeds its constitutional cap — it fell to 4.25% for tax year 2024 before reverting to the 4.40% statutory baseline. Because the exact rate for a given tax year isn't finalized until late in that year, always confirm the current figure before filing. Colorado has no local income taxes anywhere in the state.
Step 4 — Register for sales tax if you sell taxable goods or services.
File Sales & Use Tax System (SUTS) registration, plus separate home-rule city registration where applicable with the Colorado Department of Revenue (Sales & Use Tax System / SUTS) at tax.colorado.gov/suts, No fee for the state registration fee. The Department of Revenue assigns your state filing frequency based on collection volume; home-rule cities set their own separate filing schedules for their locally administered tax.
Step 5 — Register for payroll/reemployment tax the moment you hire your first employee.
The moment you hire your first employee, register with the Colorado Department of Labor and Employment. The 2026 new-employer introductory rate is 1.35%, and the taxable wage base jumped sharply from $23,800 to $30,600 for 2026 — Colorado's wage base is now indexed to the state average weekly wage rather than a fixed statutory schedule, so expect it to keep climbing annually.
Step 6 — Set up quarterly estimated tax payments.
If you expect to owe $1,000 or more in combined federal and Colorado tax for the year, both the IRS and the Colorado Department of Revenue expect quarterly estimated payments covering income tax and federal self-employment tax on your LLC profit.
Step 7 — File your Periodic Report every Colorado deadline.
Periodic Report is due During a five-month filing window centered on the LLC's anniversary month — opening two months before and closing two months after with the Colorado Secretary of State, $25 (raised from $10 effective July 1, 2024) fee. Missing it triggers a $50 late fee (bringing the total to $75) if filed within 60 days after the window closes.
Step 8 — Decide whether an S-Corp election makes sense once your LLC is consistently profitable.
With Colorado's flat 4.40% rate, S-Corp election savings follow the standard federal self-employment-tax logic with no added state-level surtax to model. The SALT Parity Act's elective PTET is the notable state-specific wrinkle worth flagging for higher-income owners who itemize federally, since it can stack with an S-corp election.
Step 9 — Watch for Colorado-specific tax traps.
The 2026 unemployment insurance wage base jump — from $23,800 to $30,600 — is a genuinely current and newsworthy fact that meaningfully raises payroll costs for any Colorado LLC with employees, and it will now adjust annually rather than on a fixed schedule. Colorado's home-rule city sales tax system is also one of the most operationally complex in the country: selling in Denver, Boulder, or dozens of other home-rule cities can mean registering and filing with that city directly, separate from the state's SUTS system. The Periodic Report's 'Delinquent' status (distinct from full dissolution, with its own $100 curative filing) is a Colorado-specific trap worth knowing about before a filing window is missed.
Step 10 — Keep business and personal finances completely separate.
Commingling funds is the single biggest reason courts pierce the LLC liability shield, and it also makes tax preparation far more error-prone. Run all business income and expenses through a dedicated business bank account and keep receipts.
If LLC Attorney Does It for You
- Submit your information at llcattorney.com — entity classification, expected revenue, and whether you'll be hiring employees or collecting sales tax.
- LLC Attorney obtains your EIN, registers you with the Colorado Department of Revenue and Colorado Department of Revenue (Sales & Use Tax System / SUTS) as needed, and sets up your compliance calendar for Periodic Report.
- Receive reminders before every deadline through your client portal, plus access to flat-fee attorney consultations (no retainer) when an S-Corp election or multi-state question needs a licensed professional's judgment call.
When Should You Talk to a Tax Professional About Your Colorado LLC?
Colorado's tax picture is manageable, but a CPA or bookkeeper is worth consulting to navigate home-rule city sales tax registration if you sell in Denver or another home-rule municipality, to budget for the 2026 unemployment insurance wage base increase if you're hiring, and to evaluate the SALT Parity Act's Pass-Through Entity Tax election if you itemize federally.
What You Actually Get With LLC Attorney's Colorado Compliance Service
A Periodic Report due in a five-month window tied to your specific formation month is easy to lose track of compared to a fixed calendar date — LLC Attorney's Colorado service tracks your exact anniversary window so it's never missed.
- EIN obtained for you at no extra charge.
- State tax and sales tax registration handled as part of formation, starting at $49.
- An ongoing compliance subscription (available through an ongoing compliance subscription — contact LLC Attorney for current pricing) tracks every Colorado deadline — Periodic Report, and registered agent renewal.
- Access to professionally trained Business Success Advisors at no charge, plus flat-fee attorney consultations (no retainer) for S-Corp election analysis and multi-state nexus questions.
Colorado's anniversary-based Periodic Report window and home-rule city sales tax patchwork both reward careful tracking — LLC Attorney keeps your filing window and registrations current so a missed deadline never escalates into Delinquent status.
Get Your Colorado LLC's Taxes Set Up Correctly
Getting your EIN, tax registrations, and compliance calendar right from day one prevents expensive corrections later. LLC Attorney's Colorado formation service starts at $49, and an ongoing compliance subscription (available through an ongoing compliance subscription — contact LLC Attorney for current pricing) keeps you ahead of every deadline after that. See our full pricing for all service tiers.
Frequently Asked Questions
No. Colorado has no franchise tax and no minimum or net-worth-based tax on LLCs. The only recurring state-level obligation tied to LLC existence is the $25 Periodic Report filed with the Secretary of State — a filing fee for staying in good standing, not a tax on income or capital.
Only if you sell taxable tangible personal property or services in Colorado. Register through the state's Sales & Use Tax System (SUTS) for the 2.90% state rate, but if you sell in a home-rule city like Denver, Boulder, or Colorado Springs, you may also need to register and file directly with that city, since roughly 70 home-rule municipalities administer their own sales tax separately from the state.
Every Colorado LLC files a Periodic Report with the Secretary of State during a five-month window centered on its formation anniversary month, for a $25 fee. Missing the window brings a $50 late fee, and after 60 days the LLC becomes 'Delinquent,' requiring a separate $100 curative filing rather than a standard report.
Missing the Periodic Report window triggers a $50 late fee (bringing the total to $75) within a 60-day grace period. After that, the LLC becomes 'Delinquent' and must file a $100 Statement Curing Delinquency instead of a standard report. After 3+ years delinquent, the Secretary of State may formally dissolve the entity, requiring $100 Articles of Reinstatement to restore it.
It depends on your profit level. Colorado's flat 4.40% rate applies the same to wages and distributions, so S-Corp election here is primarily a federal self-employment-tax play — consider stacking it with the SALT Parity Act's elective Pass-Through Entity Tax if you itemize federally.
A single-member Colorado LLC defaults to a disregarded entity for federal tax purposes — you report income on Schedule C and pay self-employment tax via Schedule SE. Colorado adds its flat 4.40% income tax on top at the personal level, plus the $25 Periodic Report regardless of member count.
If your LLC does business in a state other than the one it's formed in — an office, employees, inventory, or significant sales there — you may have created nexus requiring registration and tax obligations in that state too. This is fact-specific and worth a conversation with a tax professional if you operate in multiple states.
For a typical Colorado LLC with in-state owners and no employees: a flat 4.40% state income tax on your share of profit, no franchise tax, just the $25 Periodic Report, plus federal income tax and 15.3% federal self-employment tax (up to the $184,500 Social Security wage base for 2026). Add 2.90%–11.00%+ combined sales tax only if you sell taxable goods or services, and budget for the 2026 UI wage base jump to $30,600 if you have employees.
Yes. LLC Attorney's ongoing compliance subscription tracks your Colorado filing deadlines, handles your Periodic Report, and connects you with flat-fee attorney consultations (no retainer) when a tax question needs a licensed professional's judgment call.