Colorado’s small employer band is one to fifty eligible employees — C.R.S. § 10-16-102(61)(b)(II). One employee is enough to be inside it. The number is the easy half of this question; the hard half is what Colorado means by an eligible employee, and what the statute asks of an employer sitting at the bottom of the band.
The sentence that settles it, in the statute’s own words
Colorado does not leave this to practice or to a carrier’s underwriting appetite. It is a definition in the insurance code, and it reads as follows in the 2026 edition of Title 10:
(61) (a) Repealed. (b) “Small employer” means any person that: (I) Is actively engaged in business; (II) Employed an average of at least one but not more than fifty eligible employees on business days during the immediately preceding calendar year, except as provided in subsection (61)(e) of this section; and (III) Was not formed primarily for the purpose of purchasing insurance.
Three conditions, joined by and. The headcount is only the second of them. A business that is not actively engaged in business does not qualify however many people it employs, and neither does an entity assembled for the purpose of buying insurance. Those two limbs are worth naming once even so: they are the reason the definition is a test of a business rather than a test of a payroll.
What the statute actually measures is an average, backward, across business days
The measuring instruction inside that clause deserves more attention than the number does, because it is the part that decides whether a seasonal or growing Colorado business is inside the band this year.
The test is an average of eligible employees, counted on business days, during the immediately preceding calendar year. Not a headcount on the day you apply. Not a peak. Not the roster you expect to have by spring. A Colorado employer whose staffing swings across the year is measured on what the whole of last year averaged out to, and a business that has grown fast since January is still measured against the year behind it.
That matters in both directions. A business that spiked over the summer does not lose the band because of the spike. A business that has doubled since the new year does not leave the band until the calendar catches up with it. If you are pricing group health coverage for the first time, the number you should be running is last year’s average across business days, not today’s payroll report.
“Eligible employees” is a defined term, and the band inherits its narrowness
Read the clause again and notice that it does not say employees. It says eligible employees, and Colorado defines that term in its own subsection of the same section rather than leaving it to its ordinary meaning.
This is the single most common way an owner gets the wrong answer to this question. They count everyone on the payroll, land comfortably inside the band, and are then surprised when a carrier’s arithmetic produces a different figure — or, more often, when it produces the same figure by a different route and nobody can explain why. Colorado’s definition is narrower than the word suggests, and the statute also sets out separately how the number of eligible employees is to be calculated.
Who lands inside that definition — temporary staff, an owner, an owner’s spouse or civil union partner, a partner in a partnership, a family member on the payroll — is a genuinely separate question with its own statutory answer, and it is not settled by the band. For a first plan, the practical move is to treat the band as the outer frame and the definition as the thing that actually decides the count. That is the shape of the conversation on a first group health plan.
One employee is inside the band, and the statute says what to hand over
Here is the provision most Colorado employers have never seen, and it is the real answer to “how many do I need.”
(d) In order to be classified as a small employer with more than one employee when only one employee enrolls in the small employer’s health benefit plan, the small employer shall submit to the small employer carrier the two most recent quarterly employment and tax statements substantiating that the employer had two or more eligible employees. Such small employer group shall also meet the participation requirements of the small employer carrier.
That is C.R.S. § 10-16-102(61)(d), and notice what it is not. It is not a refusal. The band opens at an average of at least one eligible employee, and the employer who lands at that edge is asked for documents rather than turned away. The proof Colorado asks for is ordinary payroll paperwork you already file: the two most recent quarterly employment and tax statements, substantiating that the business had two or more eligible employees.
The distinction the subsection draws is between how many people you have and how many people enroll. Those are different numbers for almost every small employer — someone is on a spouse’s plan, someone is on public coverage, someone declines. Colorado’s rule addresses the case where that gap leaves a single enrollee, and it resolves it with evidence rather than with a bigger headcount.
The same sentence ends by pointing at the carrier, not the state
The last line of that subsection is easy to read past and it changes what the rest of it means: the small employer group shall also meet the participation requirements of the small employer carrier.
So there are two gates, and only one of them is the statute’s. Colorado sets the band and sets the proof. The participation requirement — how many of your eligible employees have to actually take the coverage — is the carrier’s, and so is any minimum employer contribution. Federal regulation says the same thing from the other side: the guaranteed-availability rule at 45 C.F.R. § 147.104 is expressly subject to the paragraphs that follow it on minimum participation and employer contribution, so both kinds of requirement exist in the small group market and their level is set at state and issuer level rather than fixed nationally.
This post names them and stops there, deliberately. Any percentage you have been quoted for either one came from a carrier or from a summary of one, not from Colorado law, and it varies by carrier, by group size and by product.
Where the band stops, and what sits directly above it
Colorado wrote the ceiling twice, once from each side. The mirror to the small employer definition reads:
(40.5) (a) “Large employer” means any person that: (I) Is actively engaged in business; (II) Employed an average of more than fifty eligible employees on business days during the immediately preceding calendar year, except as provided in subsection (40.5)(c) of this section; and (III) Was not formed primarily for the purpose of purchasing insurance.
Same three limbs, same measuring instruction, opposite side of the line.
Large group is a real market with its own rules, and an employer that crosses the line is not left without options. It is simply asking a different set of questions from the ones on this page.
The date the band settled, and the note that says it is still settled
If you look this up yourself you will want to know how current the sentence you are reading is. Colorado’s statute answers that in two places, and both are worth knowing.
The source note to C.R.S. § 10-16-102 records the amendment itself: L. 2024: IP(40.5)(a), (40.5)(a)(II), IP(61)(b), and (61)(b)(II) amended, (SB 24-073), ch. 146, p. 589, § 1, effective January 1, 2026.
Both the small employer definition and its large employer mirror moved in that one act — SB 24-073 — on that one date.
The amendment also carried a conditional repeal, which raises the obvious follow-up: has it fired? The publisher of the statute answers it affirmatively rather than leaving a reader to infer it from silence. Editor’s note (3) to C.R.S. § 10-16-105.1 reads: (3) As of publication date, the revisor of statutes has not received the notice referred to in subsection (3.5)(d).
That is a statement by the office that compiles Colorado’s statutes about a document it did or did not receive — better evidence than an absence, and the reason this post can say the band is settled rather than that it appears to be.
Why looking this up yourself can hand you the wrong number
One caution, because it is a live trap rather than a theoretical one. A prior edition of Title 10 is still published, still returns cleanly, and is a large searchable document. Across the small employer definition and its large employer mirror it prints bracketed Editor’s-note blocks carrying more than one version of the same subsection, with a superseded version appearing ahead of the operative one and a stale effective-date preamble attached to it.
An owner who searches for “small employer” in that file and reads the first block they land on will come away with the wrong number, the wrong list of entity forms, and a date stamped on it that belongs to neither. The defense is simple: check the edition on the running header of whatever you are reading, and check the source note. The edition is part of the citation, not decoration on it.
The federal question this is not
One last separation, because the two get merged constantly. Colorado’s band decides which market rules, rating rules and availability rules attach to the policy. The federal employer shared responsibility provisions decide whether an employer can owe an assessable payment. Different authority, different purpose, answered separately.
The IRS puts the practical upshot for a small employer plainly: The vast majority of employers will fall below the ALE threshold number of employees and, therefore, will not be subject to the employer shared responsibility provisions.
A Colorado small employer buying a first plan is almost always doing so voluntarily, not to satisfy a federal requirement. That is a better starting point for the conversation than a compliance framing, and it is where a quote should begin — with what you want the plan to do, not with what you are afraid of owing. Our Colorado page covers how this brand works in the state.
The bottom line
Colorado’s small employer band is one to fifty eligible employees under C.R.S. § 10-16-102(61)(b)(II), so an employer at the very bottom of the band is inside it rather than outside it. The number is not really the gate. The statute measures an average across business days in the preceding calendar year, it counts a defined term rather than heads, and where only one employee actually enrolls it asks for two quarterly employment and tax statements — documents, not a bigger payroll.
Frequently asked questions
How many employees do you need for a group health plan in Colorado?
Colorado’s small employer band is one to fifty eligible employees — C.R.S. § 10-16-102(61)(b)(II). The statute measures an average across business days during the immediately preceding calendar year, and it also requires that the business be actively engaged in business and not have been formed primarily for the purpose of purchasing insurance.
Can a Colorado business with one employee get a group plan?
One employee sits inside Colorado’s band, which opens at an average of at least one eligible employee. Where the employer wants to be classified as a small employer with more than one employee and only one actually enrolls, C.R.S. § 10-16-102(61)(d) directs the employer to give the carrier its two most recent quarterly employment and tax statements substantiating two or more eligible employees.
Does Colorado count part-time employees toward the band?
Colorado’s band counts eligible employees rather than heads, and eligible employee is a term the statute defines in its own subsection. The statute separately sets out how the number of them is calculated. Which individual workers land inside that definition is a distinct question with its own set of rules, and it is not settled by the band alone.
When did Colorado’s small employer band become one to fifty eligible employees?
The source note to C.R.S. § 10-16-102 records that the introductory portion of subsection (61)(b) and subsection (61)(b)(II) were amended by Senate Bill 24-073, effective January 1, 2026. The large employer mirror at subsection (40.5)(a) was amended in the same act and on the same date.
Is Colorado’s small employer band the same thing as the federal employer mandate?
No — they answer different questions. Colorado’s band decides which market rules apply to the policy. The federal employer shared responsibility provisions decide whether an employer can owe an assessable payment, and the IRS states that the vast majority of employers fall below the applicable large employer threshold and are therefore not subject to them.
About the author
Nate Jones, CPCU, is the founder of Wexford Insurance and Wexford Health Insurance, an independent agency placing small-business group benefits in 9 states. Nate works Colorado’s small employer definition from the current edition of the statute rather than from a summary, which is what separates the band that is in force from the one that used to be. Start with the Wexford Health Insurance quote form.