How does Colorado state income tax and unemployment insurance work in 2026?

One of fourteen flat-rate states

The same $120,000 offer to Hannah, recut for California, carries roughly $9,200 in state tax at the 9.3 percent marginal bracket. New York lands somewhere between. Colorado is one of the simplest US states to model offer letters for on the income-tax dimension.

Ballot measures still cycle the rate

Advocacy groups have proposed both a graduated income tax and further flat-rate cuts for the 2026 ballot. Neither has passed at the time of writing. Set offer-letter calculators to 4.40 percent for 2026 and run a quarterly check of the Colorado Secretary of State’s ballot filings. Teamed’s US employment specialists watch Colorado ballot activity and surface any rate change before the first January payroll runs. Use the Employer Cost Calculator to model the full Colorado cost before you make an offer.

What this means for offer letters

Flat rate means simple modelling. Gross wages, minus federal pre-tax deductions, times 4.40 percent. The complexity in Colorado payroll lives elsewhere, in FAMLI, the SUI wage base, and the city-by-city minimum wage map, not in income tax.

Forecast the cap-date or eat the variance

The $3,400 wage-base jump means SUI runs longer through the year before any given employee hits the cap. Forecast cap-out dates per employee at the start of the year and the higher Q2 and Q3 charge lands on your books before it shows up as a variance on the Q3 close. Teamed’s payroll engine produces that forecast as part of the January payroll readiness pack.

Industry-assigned new-employer rate

Colorado does not assign a single new-employer rate. The state looks up your NAICS code and assigns the introductory rate that applies to your industry. You do not have to wait for the December notice to know it, though. CDLE publishes the introductory rates in advance, and for 2026 there are only two numbers a commercial employer can land on.

Every one of those is charged on the first $30,600 of each employee’s wages, and the combined rate already contains the Support Rate and the Solvency Surcharge, so it is the whole introductory cost rather than a base to add to. Note what the 2026 table does and does not say about construction. General construction sits at 3.05 percent, identical to non-construction and trades. Only heavy construction is higher, at 6.285 percent. The old rule of thumb that construction always carries a premium introductory rate does not hold for three of the four commercial classes this year.

The introductory rate stays in effect until your account has paid wages for enough quarters, measured as at 30 June of the year before the new rate year, for CDLE to compute a reserve-ratio-based experience rate. CDLE’s own guidance is that most employers have an experience rate after their first year of activity in Colorado, so budget for the introductory rate for about a year rather than for three. Your specific rate lands on the annual notice in late December.

FUTA credit interaction

Federal Unemployment Tax (FUTA) is 6.0 percent on the first $7,000 of each employee’s wages. A Colorado employer that pays state SUI in full and on time receives a FUTA credit of 5.4 percent, leaving an effective FUTA of 0.6 percent, $42 per employee per year. Compare how this plays out in states without SUI: Florida state tax & UI and Delaware state tax & UI. Late or partial Colorado SUI payment erodes the federal credit and pushes the effective FUTA rate up. Teamed’s payroll books both lines together so the credit never gets lost.

Quarterly remittance through My FAMLI+ Employer

Premiums are remitted quarterly through the My FAMLI+ Employer portal. Wage reports and payment are due by the last day of the month after each quarter, 30 April, 31 July, 31 October, 31 January. The quarterly wage report is reconciled against the SUI quarterly report. A discrepancy between the two raises a flag inside the state for review. Teamed files both off the same wage data so the cross-check never returns a mismatch.

What employees can claim

FAMLI provides up to 12 weeks of paid leave per year. Bonding with a new child, caring for a seriously ill family member, the employee’s own serious health condition, military exigency, or safe-leave reasons. An additional 4 weeks is available for pregnancy or childbirth complications. Wage replacement is up to 90 percent of average weekly wages for low earners, scaling down for higher earners, capped at the state average weekly wage. Leave is job-protected once the employee has worked 180 days with the same employer.

The under-10 carve-out is operational, not optional

Sienna’s 12-person company is over the threshold, so she pays both halves. A 9-person employer pays only the employee half but still has to register, withhold, and remit through the same portal. Below ten the employer share is genuinely zero, not reduced. The test is whether ten or more employees worked during 20 or more weeks of the previous full calendar year. Cross the threshold mid-year and the employer-share obligation begins the following 1 January, not retroactively.

Two rules that make the carve-out narrower than it looks

If you are a multi-state employer adding a small Colorado team, read this twice. Both rules cut against the intuitive answer, and both cost money.

• The count is your total headcount, not your Colorado headcount. FAMLI counts every employee you have, including the ones who never set foot in Colorado. A three-person Colorado team inside a 40-person US company is over the threshold and owes the full employer 0.44 percent on those Colorado wages. The carve-out is for small employers, not for small Colorado teams.
• Silence forfeits the exemption. You have to update your annual total employee headcount in My FAMLI+ by 28 February each year. Miss that date and the Division assumes you have ten or more employees and bills the full 0.88 percent for every quarter of that year. A genuinely nine-person employer that forgets the filing pays an employer share it never owed.

The 2020 federal W-4 redesign removed the allowances mechanic that older state forms relied on. Colorado solved that with DR 1098 as a translation layer, enter the W-4 numbers, apply the lookup, and Colorado withholding emerges. An employee comfortable with W-4 withholding aligned to the 4.40 percent rate does not need DR 0004 at all.

• Line 1 (annual standard deduction), an employee can override the default state standard deduction. Useful for itemising filers who want closer alignment between withholding and final liability.
• Line 2 (annual allowance for child and dependent tax credits), reduces the taxable wage on which withholding is calculated.
• Line 3 (additional withholding per pay period), a flat-dollar over-withholding line, similar to the federal W-4 extra-withholding field.
• Box at top (no withholding), rare; valid only where the employee certifies they will owe no Colorado tax for the year.

What employers do when an employee files DR 0004

If an employee gives you a completed DR 0004, you calculate their Colorado withholding using the amounts entered on the form, via the DR 1098 worksheet. If they do not file one, you calculate from the federal W-4 entries, also via DR 1098. Either way, DR 1098 is the canonical method. Employers do not pick their own.

The retention rule

You retain any completed DR 0004 in the employee’s payroll file. You do not submit it to the state with regular filings, it is produced only on audit request. Teamed’s onboarding flow offers DR 0004 alongside W-4 and I-9 on day one, captures any completed form, and feeds the values into the DR 1098 calculation automatically.

The cadence-switch rule catches the second hire

A company that hires Hannah alone files quarterly all year, her $5,280 of state tax sits well under the $7,000 threshold. Add Mateo as a second hire in October, and the combined annual withholding crosses the threshold for the next year. The state notifies you in December and your January cadence flips to monthly. Teamed’s payroll engine flags the crossover at the headcount addition that tips the maths, so you are never caught filing quarterly when you should have moved to monthly.

Revenue Online is the e-file portal

Revenue Online is the canonical e-file portal for DR 1094, DR 1093, and the 1099 withholding return DR 1106. Employers with more than 250 W-2s are required to file electronically. Below that threshold e-filing is optional but practically universal for any modern payroll system. The same portal handles new-employer registration via the CR 0100AP combined application.

Zero-filing requirement

A quarterly, monthly, or weekly filer with zero Colorado withholding for the period still files a zero return. Skip it and Revenue Online flags a missing filing and starts the delinquency clock. The annual reconciliation is required even in a zero year if the employer was active for any part of it.

The local-wage trap

A Colorado payroll mixing Denver, Boulder, Aurora, and unincorporated state workers runs three or four minimum wages at once. The compliance question is captured at onboarding, work address by jurisdiction, and re-checked at any address change. Get it wrong on a remote employee and the back-pay clock starts the day they began working from the higher-rate jurisdiction.

Daily overtime under COMPS

Colorado adds state-specific overtime rules on top of the federal weekly trigger. Full details are in the Colorado wage, overtime, and meal-break law guide. Time-and-a-half for hours over 40 in a workweek (matches federal). Time-and-a-half for hours over 12 in a workday (no federal equivalent). And time-and-a-half for hours over 12 consecutive in a single shift. The rule that produces the most overtime pay applies. Most office employees never trigger the daily rule. Warehouse, healthcare, and field-service operations do.

OPT is dollar-flat per employee per month, not a percentage. It scales with headcount, not wages. Employees working remotely from a Denver address for an out-of-state employer still trigger the Denver-side liability. Teamed’s payroll engine handles Denver OPT registration as part of the standard Colorado new-employer setup and remits monthly.

Two Denver rules that add employer OPT you did not budget for

The $4.00 Business OPT is wider than the employee headcount suggests, and Denver’s Tax Guide Topic 61 is explicit on both counts.

• Owners, partners, and managers count too. The employer owes $4.00 a month for each owner, partner, or manager engaged in business in Denver, and the $500 earnings test does not apply to them because they are not employees. A Denver firm with two working partners carries $8 a month of Business OPT before a single employee is counted.
• An employee exempt from the employee half does not exempt you. Where an employee is already paying the $5.75 Employee OPT through a primary Denver employer and files Form TD269 with you, you stop withholding their $5.75 but you still owe the $4.00 Business OPT for them.

The three smaller cities are easy to miss

Glendale, Greenwood Village, and Sheridan each run their own OPT-equivalent with different thresholds and dollar amounts. A multi-state payroll provider without specific Colorado depth often misses these. Capture work address to the municipality at onboarding and the trigger fires automatically. Skip the step and you are quietly out of compliance from the first paystub.

Aurora no longer charges OPT

Aurora used to run an OPT at $2.00 a month from the employee and $2.00 a month from the employer above $250 of monthly wages. The city repealed it with effect from 1 January 2025 under Ordinance 2022-77, with the December 2024 and Q4 2024 returns the last ones due. There is no Aurora OPT to register for or remit in 2026, and a payroll still deducting it is running a tax that does not exist. Aurora does continue to accept amended returns, returns for periods before January 2025, and refund claims, which is worth knowing if you ran Aurora payroll before the repeal.

What a Colorado hire through Teamed looks like, day by day:

• Day 0: Revenue Online registration with the state (withholding), MyUI Employer+ registration (SUI), My FAMLI+ Employer registration (FAMLI), and Denver eBiz Tax Center registration if any work address sits in Denver. Teamed’s US entity (Teamed US Inc., Delaware) is the legal employer of record.
• Day 1: employee onboarded with federal W-4, optional DR 0004 (offered, not required), and Form I-9 in a single digital signing session. Work-address jurisdiction captured to the city to set the right minimum wage. New-hire reporting filed with the state directory within 20 days.
• Ongoing: withholding filed quarterly, monthly, or weekly per the state-assigned tier. FAMLI quarterly through My FAMLI+ Employer. SUI quarterly through MyUI Employer+. Denver OPT monthly where applicable. FICA, FUTA, SUI, FAMLI, state income tax all calculated and remitted on schedule. The 2026 SUI cap-out date is forecast per employee before the first January payroll runs.
• Year end: annual reconciliation with W-2 copies filed by 31 January, 1099 withholding return for contractors if applicable, FAMLI annual reconciliation through My FAMLI+ Employer, the annual SUI rate notice from late December applied from the first January payroll.

Pricing is one number per employee per month, in any currency you pay us in. No FX mark-up between your billing currency and the US dollars Teamed remits to the state. Statutory employer cost, FICA, FUTA, SUI, FAMLI, workers’ comp, Denver OPT where applicable, passes through itemised on every invoice. Every line is auditable.

Behind the platform sit real HR and legal experts with deep local employment-law expertise who know the Colorado FAMLI mechanics, the under-10 carve-out, the $30,600 SUI wage base shift, the Denver OPT thresholds, and the state overtime rules by heart. When something looks off on a payslip, you message an actual person, not a chatbot or a pooled queue.

Contractor onboarding, EOR payroll, and graduating to your own entity when the model no longer fits all live on one platform. A Colorado contractor who converts to W-2 keeps their record. One timeline. One platform.

When EOR is the right call (and when it isn’t)

EOR works while you are testing the Colorado market, ramping a small remote team, or running one or two hires alongside a larger US payroll elsewhere. Once you have eight or more Colorado employees and predictable hiring ahead, the maths of running your own US entity starts to win. The Colorado hiring overview walks through the entity-vs-EOR decision in more detail. Teamed’s Crossover Calculator tells you the month the EOR model stops being right. The conversation is built into the relationship.