Who Counts as an Employee for a Group Plan in Illinois

Illinois does not run one head count on your business. It runs several, they belong to different bodies of law, and each one counts a different set. The count that decides whether you buy in the small-group market is set by 215 ILCS 97/5 and runs twice — an average across business days in the preceding calendar year, and a head count on the first day of the plan year. A separate federal count, which governs a tax provision rather than market access, counts full-time employees together with full-time equivalents. A third count is run by the issuer and measured against a denominator of its own. And once you actually offer coverage, Illinois counts a fourth set entirely. Before any of them, three attached rules can change the number you start from.

The sentence Illinois counts

The Illinois small-employer definition does not live in the Act whose title suggests it. It lives in the Illinois Health Insurance Portability and Accountability Act, at 215 ILCS 97/5, and other Illinois acts reach it by cross-reference. The operative sentence reads:

“‘Small employer’ means, in connection with a group health plan with respect to a calendar year and a plan year, an employer who employed an average of at least 2 but not more than 50 employees on business days during the preceding calendar year and who employs at least 2 employees on the first day of the plan year.”

The Source line on that section is P.A. 104-533, eff. 6-26-26 — amended in the current session and already in force.

Read the sentence as two tests joined by “and,” because that is what it is. The first is retrospective and averaged: it looks back across the business days of the preceding calendar year. The second is a snapshot: it asks what is true on one specific day, the first day of the plan year. A business can satisfy one and fail the other. A business that grew across last year and shrank in December, or that was staffed up on business days all year and had people out the door before January, is not obviously on one side of this definition or the other, and the two tests are what settle it.

The lower bound of the band appears in both tests, and that is the part most likely to catch an Illinois reader by surprise. Illinois does not start at one. A sole proprietor with no employees, and a one-employee group, do not meet either of the Illinois tests.

The word the statute uses, and the two words it does not

The sentence says “employees.” It does not say “full-time employees.” It does not say “eligible employees.” Those are the two narrowings a reader is most likely to supply from memory, and neither one is in the text.

That is not an accident of drafting, because Illinois law is perfectly capable of saying something narrower when it means something narrower. The Consumer Coverage Disclosure Act, discussed further down, addresses itself to “all employees eligible for the coverage” — a set defined by eligibility, written out in those words. When a statute wants the narrower class, it names it.

What the bare word does mean in practice still depends on the three attached rules, which is where most real Illinois businesses find their answer changes.

Three rules that change the number before you count it

The same definition that sets the band carries three counting rules, and all three sit inside it rather than somewhere else in the Act.

Commonly controlled entities are treated as one employer. All persons treated as a single employer under subsections (b), (c), (m) or (o) of Section 414 of the Internal Revenue Code of 1986 are treated as one employer for this purpose. What triggers this is ownership and control, not whether the entities share a payroll provider, a brand or a building. An owner with three small companies may find the definition sees one employer, and the head count it runs is the combined one.

A business that was not in existence throughout the preceding calendar year is measured on expectation. There is no prior-year average to take, so the definition substitutes the average number of employees the business is reasonably expected to employ on business days in the current calendar year. A company formed mid-year is not shut out of the analysis for lack of a look-back period; it is measured forward instead.

Predecessors count. Any reference to a small employer includes any predecessor of that employer. A business that was bought, reorganized or renamed does not restart its count at zero.

Resolve these three before you count anything, because each of them operates on the input to the average rather than on the result.

The federal line counts a different unit again

There is a well-known federal employee threshold, and it is not the Illinois line. It comes from the regulation at 26 CFR 54.4980H-1(a)(4):

“Applicable large employer. The term applicable large employer means, with respect to a calendar year, an employer that employed an average of at least 50 full-time employees (including full-time equivalent employees) on business days during the preceding calendar year. For rules relating to the determination of applicable large employer status, see § 54.4980H-2.”

The parenthetical is the whole point of quoting the regulation rather than paraphrasing it. “Including full-time equivalent employees” brings in a constructed unit — part-time hours assembled into notional whole employees — that appears nowhere in the Illinois sentence. Two counts of the same workforce, run under the two rules, will not generally produce the same number, and neither one is wrong.

The federal line also does a different job. It is easy to read it as a mandate to offer coverage, and it is not one. 26 U.S.C. 4980H(a) is written as a conditional: if an applicable large employer fails to offer its full-time employees and their dependents the opportunity to enroll in minimum essential coverage under an eligible employer-sponsored plan for a month, and at least one full-time employee has been certified as having enrolled that month in a qualified health plan with respect to which a premium tax credit or cost-sharing reduction is allowed or paid, then an assessable payment is imposed on the employer. Both limbs have to be met. Nobody is ordered to do anything.

For the reader of this page, the IRS states the practical conclusion without anyone needing to run the count: “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 small Illinois employer offering coverage is doing so voluntarily.

A third count, and the issuer runs this one

Guaranteed availability is the rule that decides whether a small employer can buy at all. Under 45 CFR 147.104, an issuer offering coverage in the individual, small group or large group market in a state “must offer to any individual or employer in the State all products that are approved for sale in the applicable market, and must accept any individual or employer that applies for any of those products.”

But that sentence opens by making itself “subject to paragraphs (b) through (d) of this section,” and paragraph (b) is where a different count lives:

“In the case of a group health plan in the small group market that cannot comply with employer contribution or group participation rules for the offering of health insurance coverage, as allowed under applicable State law … a health insurance issuer may restrict the availability of coverage to an annual enrollment period…”

So participation and contribution conditions are real, they sit outside the guarantee rather than inside it, and a group that cannot meet them is not simply declined — it can be steered to a restricted window instead. The level of the requirement is not fixed federally for the whole market. 45 CFR 155.706 contemplates that a state law may set a minimum participation rate, or that a higher or lower rate may be customarily used by the majority of issuers in that state for products in the state’s small group market.

The counting basis is worth knowing even without the number. Participation is measured against the employees offered coverage, and employees who already hold coverage elsewhere — another group plan, government coverage, or coverage they bought themselves — count toward the requirement rather than against it. Groups often assume the opposite and talk themselves out of a plan they would have qualified for.

Once you offer, Illinois counts a fourth set

Illinois does not require a private employer to offer health coverage. It does attach a duty to the act of offering, and that duty runs to a set defined by eligibility rather than by head count. 820 ILCS 46/10(a), the Consumer Coverage Disclosure Act:

“An employer that provides group health insurance coverage to its employees shall, upon hire, annually thereafter, and upon request from an employee, provide all employees eligible for the coverage a written list of the covered benefits included in the group health insurance coverage in a format that easily compares those covered benefits with the essential health insurance benefits required of individual health insurance coverage regulated by the State of Illinois.”

The Source line for every section of that Act is P.A. 102-630, eff. 8-27-21. It is enforced by the Illinois Department of Labor, not the Department of Insurance, and the Department of Insurance’s job under §10(b) is to supply the comparison information the employer works from. The triggers are not just the first one: on hire, annually after that, and whenever an eligible employee asks.

This is the count most likely to be missed, because it is not a count that decides anything about your plan. It decides who you owe a document to.

What none of these counts decides

None of them decides whether your employees’ health history can be held against the group. Guaranteed availability is the answer there, subject to the participation and contribution conditions above.

And none of them changes who holds the policy. In the small group market, employees obtain coverage through a group health plan maintained by their employer, and the employer is the group policyholder — federal rules locate the group by the employer’s own principal business address rather than by where each employee lives. Coverage offered in connection with a group health plan is group market coverage; coverage offered to individuals other than in connection with a group health plan is not.

Which means the practical order of work is the reverse of how most people approach it. Resolve the aggregation, predecessor and reasonable-expectation questions first. Then run the two Illinois tests at 215 ILCS 97/5 on the number that comes out. Treat the federal threshold as a separate question with a separate unit, and the issuer’s participation test as a third question that only arrives once you are shopping.