Do Employers Have to Offer Health Insurance? The Rules by Headcount
Do employers have to offer health insurance? Not below 50 full-time equivalents. What the mandate requires at 50, what it costs to skip, and state rules.
Do Employers Have to Offer Health Insurance?
Where the federal line falls, what changes when you cross it, and the state rules that go further
The first time a candidate asked me whether we offered health insurance, and whether we had to, I did not have a clean answer for either half of the question. We were at 31 people. I said something vague about reviewing our options and moved on, which is the worst possible answer to give someone deciding whether to join you.
That evening I read the employer provisions of the Affordable Care Act properly for the first time. We were not required to offer anything, and would not be until our full-time equivalent count averaged 50 across a full calendar year. Useful to know. Also slightly embarrassing that I had gotten to 31 employees without knowing it.
The question sounds simple, but three separate questions hide inside it: whether you have to offer coverage at all, who you have to offer it to, and how much of the premium you have to pay. The answers are different from each other, and the third one surprises most owners. This guide walks through all three at every size of business, plus the states and cities that go further than federal law. I built FirstHR for owners making these calls without an HR department, and this is the answer I wish I had that night.
The Short Answer, by Headcount
Employers with fewer than 50 full-time equivalent employees are not required by federal law to offer health insurance. Employers that average 50 or more are, under the Affordable Care Act employer shared responsibility provisions, and the requirement is enforced through the tax code rather than through an order to buy a policy.
That single line covers the vast majority of American businesses. The complications come from what still applies below the threshold, and from what the word required means once you cross it.
| Size of your workforce | Required to offer coverage? | What applies regardless |
|---|---|---|
| 1 to 19 employees | No federal requirement | If you do offer a plan, ACA market reforms, ERISA and the 90 day maximum waiting period apply to it |
| 20 to 49 employees | No federal requirement | COBRA continuation coverage attaches at 20 employees, on top of everything above |
| 50 or more full-time equivalents | Yes, the employer mandate applies | Offer to 95 percent of full-time employees and their dependent children, plus annual IRS reporting |
| Any size, in Hawaii | Yes, for employees at 20 or more hours a week | State Prepaid Health Care Act rules on coverage and the employee premium share |
Where the 50 Employee Line Comes From
The threshold is not a headcount. It is an average of full-time employees plus full-time equivalents across the prior calendar year, and the two halves are counted differently. The IRS guidance on determining applicable large employer status states that an employer with at least 50 full-time employees including equivalents, on average during the prior year, is an applicable large employer for the current calendar year.
Full time means an average of at least 30 hours of service a week during a calendar month, or at least 130 hours of service in that month. Everyone else is converted: total the hours of all non-full-time employees for the month, count no more than 120 hours from any one person, and divide the total by 120. That gives your full-time equivalents for the month.
Add full-time employees and full-time equivalents for each of the twelve months, average the monthly totals, and compare the result to 50. The ACA compliance guide works a full year of that arithmetic line by line, and the primer on full-time equivalent counting covers the same unit in staffing and budgeting contexts.
What Required Actually Means Here
No federal agency will order you to buy a health plan. The employer mandate operates as a tax: an applicable large employer that does not make a qualifying offer owes an employer shared responsibility payment, and only when at least one full-time employee buys subsidized coverage through the marketplace.
There are two versions of the payment and they never apply at the same time. The first covers a failure to offer coverage broadly. The second covers an offer that exists but is too expensive or too thin.
$5,010 per full-time employee for 2026 under section 4980H(b), which applies per employee who receives a subsidy because the offer was unaffordable or failed minimum value. The IRS set both amounts in Revenue Procedure 2025-26. Details of the calculation sit in the IRS guidance on employer shared responsibility provisions.
The practical read: the mandate is a price on not offering coverage, not a prohibition. For most employers just over the threshold the price is high enough that offering a plan is cheaper than paying it, which is exactly the design.
Who You Have to Cover
An applicable large employer has to offer coverage to at least 95 percent of its full-time employees and to their dependent children through the end of the month in which the child turns 26. Spouses are not part of the requirement, and part-time employees are not either.
The 95 percent margin matters more than it sounds. It exists because eligibility data is never perfect at scale, and it gives you room for the new hire whose measurement period was misjudged or the person who moved from part time to full time mid-year without anyone updating the file.
Part-time staff sit in an odd position: their hours push you toward the threshold through the equivalent calculation, but they never have to be offered a plan once you are over it. The guide to whether part-time employees get benefits covers the voluntary side of that decision, which is where most small employers actually land.
Under 50: What You Are Not Required to Do
Below the threshold, you are not required to offer health insurance, not required to contribute a cent toward premiums if you do offer, and not required to file the annual employer reporting forms with the IRS. There is no federal penalty of any kind for a small employer that offers no health coverage.
What you still owe is everything on the genuinely mandatory list: Social Security and Medicare contributions, unemployment insurance, workers compensation in nearly every state, and whatever your state adds on paid leave and retirement. The rundown of statutory benefits separates the legally required items from the ones that only feel required because everyone offers them.
Health insurance sits firmly in the second group for small employers. It is a recruiting decision and a retention decision, not a compliance one, which changes how you should evaluate it. The broader guide to small business employee benefits puts it next to the other discretionary spend competing for the same budget.
The Rules That Attach the Moment You Offer
Choosing to offer coverage voluntarily does not keep you out of the regulatory system. A group health plan brings its own set of federal requirements that have nothing to do with the 50 employee threshold, and several of them catch employers by surprise in year one.
| Rule | When it applies | Source |
|---|---|---|
| Waiting period capped at 90 days | Any group health plan, at any employer size | Affordable Care Act market reforms |
| Written plan document and summary plan description | Any ERISA covered group health plan | Employee Retirement Income Security Act |
| COBRA continuation coverage | 20 or more employees on more than half of typical business days in the prior year | Department of Labor |
| Nondiscrimination testing | Self-insured plans and Section 125 premium arrangements | Internal Revenue Code |
| No untaxed cash for individual premiums | Any employer reimbursing premiums outside a qualified HRA | IRS Notice 2013-54 and section 4980D |
The waiting period rule is the one small employers break most often, usually by writing a new hire eligibility date of the first of the month following 90 days, which quietly runs past the limit. The explainer on the benefits waiting period shows where that calendar math goes wrong.
COBRA is the threshold that arrives before the mandate does. Cross 20 employees and continuation coverage obligations begin, with notice deadlines that run on tight clocks. The guide to whether COBRA applies to a small business covers the counting rule and the notice timeline.
If a stipend is where your thinking is heading, read the breakdown of what a health insurance stipend actually costs after tax before you commit, and compare it to how an HRA works with the same money.
The State and City Layer
Hawaii is the only state that requires private employers to provide health coverage regardless of size. Everywhere else, state and local rules either add a reporting duty or impose a spending requirement rather than a duty to sponsor a plan.
The Hawaii Prepaid Health Care Act, administered by the state Department of Labor and Industrial Relations, covers employees who work at least 20 hours a week for four consecutive weeks. The state publishes the eligibility and contribution rules for prepaid health care directly. The employee share of the self-only premium is capped at 1.5 percent of monthly wages, and the employer covers at least half of that premium.
| Jurisdiction | Who it reaches | What it requires |
|---|---|---|
| Hawaii | Employers of any size, for employees at 20 or more hours a week for four consecutive weeks | Provide an approved health plan, cap the employee share of the self-only premium at 1.5 percent of monthly wages |
| San Francisco | Employers with 20 or more employees nationwide, for staff working 8 or more hours a week in the city after 90 days | Make health care expenditures at $2.74 per hour payable for employers of 20 to 99, per the 2026 rates |
| Massachusetts | Employers with six or more employees in the state | File the Health Insurance Responsibility Disclosure form each year in the window from November 15 to December 15 |
| States with individual mandates | Employers with residents of those states on payroll | Furnish coverage statements so residents can prove coverage on a state return |
San Francisco is the sharpest example of a spending rule that is not a coverage rule. The Health Care Security Ordinance sets an hourly expenditure rate rather than requiring a plan, and the city raised the rate for employers of 20 to 99 employees to $2.74 per hour payable for 2026, up from $2.56. An employer can satisfy it through a group plan, through contributions to a reimbursement account, or through payments to the city option.
Massachusetts requires the Health Insurance Responsibility Disclosure filing from any employer with six or more employees in the state, whether or not it sponsors coverage. The filing runs through MassTaxConnect and is administered jointly by MassHealth and the Department of Revenue. Missing it is a paperwork failure, not a coverage failure, but it is still an enforcement item on a small employer with a handful of people in Boston.
What Happens If You Do Not Offer
For an employer below 50 full-time equivalents: nothing happens. Employees buy coverage on the individual marketplace, may qualify for premium subsidies based on household income, and the employer owes no payment and files no additional forms.
For an applicable large employer, the arithmetic is worth seeing once. Take a business averaging 60 full-time employees that offers no coverage, where a single employee buys a subsidized marketplace plan. The 4980H(a) payment applies to 60 minus the first 30, so 30 employees at $3,340 each, for $100,200 in a full year. The trigger is one employee, and the payment is calculated on all of them past the exclusion.
The second version behaves differently. If the employer does offer coverage but the employee share is unaffordable, the payment is $5,010 for 2026 per full-time employee who actually receives a subsidy, and the total is capped at what the first payment would have produced. Three subsidized employees cost $15,030 rather than $100,200, which is why a flawed offer beats no offer every time.
Do You Have to Pay Part of the Premium?
Federal law sets no minimum employer contribution in dollars or percentage terms. What it sets, and only for applicable large employers, is a ceiling on what the employee can be charged for self-only coverage. For plan years beginning in 2026 that affordability figure is 9.96 percent of income under the applicable safe harbors, published by the IRS in Revenue Procedure 2025-25.
Below 50 employees there is no affordability test at all, which means a small employer can technically offer a plan and fund none of it. In practice carriers close that door: small group insurers generally require the employer to fund a meaningful share of the employee-only premium and to enroll a minimum share of eligible employees before they will issue a policy.
The mechanics of the safe harbors, including the W-2, rate of pay and federal poverty line methods, belong to the ACA compliance guide rather than this one. What matters at the requirement level is the shape of the rule: the law regulates the employee price, not the employer contribution.
The Case for Offering When You Do Not Have To
Most small employers offer health coverage voluntarily, and the strongest financial argument is a credit rather than a retention theory. The small business health care tax credit is worth up to 50 percent of the premiums an employer pays, and it is claimed on Form 8941 for no more than two consecutive tax years.
Eligibility is narrow and specific. The employer needs fewer than 25 full-time equivalent employees, average annual wages below an inflation adjusted limit that the statute originally set at $50,000, and a uniform contribution of at least 50 percent of the employee-only premium. Coverage generally has to be bought through the Small Business Health Options Program. HealthCare.gov documents the eligibility rules for the small business health care tax credit in full.
If a group plan is out of reach, the reimbursement route stays open. A qualified small employer HRA caps reimbursements at $6,450 for self-only and $13,100 for family coverage in 2026, per Revenue Procedure 2025-32, and an individual coverage HRA has no statutory cap. The comparison of ICHRA and QSEHRA works through which one fits which team, and the startup health insurance guide covers the full set of options and what each costs.
Before you price anything, get a realistic total. The breakdown of how much benefits cost per employee gives you a per head figure to plan against rather than a premium quote in isolation.
Crossing the Threshold Without Noticing
The most expensive version of this topic is the business that becomes an applicable large employer without realizing it, and finds out when an employee's subsidy generates an IRS letter. Because the test is a backward looking average, you can be liable for a year in which your headcount already dropped back under 50.
This is administrative work, not strategy, and it is exactly the kind of thing that falls through the cracks when nobody owns HR. Keeping accurate employee records, hours data and eligibility status in one place is what makes the count reliable, which is a large part of why I built FirstHR the way I did.
Common Mistakes
Every mistake below comes from a real pattern rather than a hypothetical, and most of them cost money only after they have been running quietly for a year or more.
Frequently Asked Questions
Do employers have to offer health insurance?
Only employers that average at least 50 full-time employees, including full-time equivalents, during the prior calendar year. Below that line there is no federal obligation to offer coverage to anyone at any contribution level. Hawaii is the exception among states, requiring coverage for employees working at least 20 hours a week for four consecutive weeks regardless of employer size.
How many employees before health insurance is required?
Fifty full-time employees including full-time equivalents, averaged across the prior calendar year. Full time means 30 hours a week or 130 hours a month. Part-time hours are converted by totaling monthly hours, capping each person at 120, and dividing by 120. Because the test looks backward, hitting 50 in June makes you an applicable large employer the following January.
What is the penalty for not offering health insurance?
For 2026 the IRS set the section 4980H(a) payment at $3,340 per full-time employee beyond the first 30, triggered when an applicable large employer fails to offer coverage to 95 percent of full-time staff and one of them takes a subsidy. The 4980H(b) payment is $5,010 per subsidized employee where the offer was unaffordable. Both figures come from Revenue Procedure 2025-26.
Do employers have to pay for health insurance or just offer it?
Federal law sets no minimum employer contribution. For applicable large employers it caps the employee share of self-only coverage instead, at 9.96 percent of income for plan years beginning in 2026 under Revenue Procedure 2025-25. Below 50 employees even that ceiling does not apply, though small group carriers usually require an employer contribution before issuing a policy.
Do small businesses have to offer health insurance to part-time employees?
No. The mandate reaches only employees averaging 30 hours a week or 130 hours a month. Part-time hours still count toward the 50 employee threshold through the equivalent calculation, which is the trap: those hours can make you an applicable large employer without creating any obligation to cover the people who worked them.
Can I give employees money to buy their own health insurance instead?
Not as untaxed cash. IRS Notice 2013-54 treats premium reimbursement outside a qualified arrangement as a non-compliant group health plan, and section 4980D carries an excise tax of $100 per day per affected employee. The compliant options are a qualified small employer HRA, an individual coverage HRA, or a taxable raise with no conditions attached to it.
What rules apply if I offer health insurance voluntarily?
A group health plan cannot impose a waiting period longer than 90 days, is almost always subject to ERISA plan document and disclosure duties, and triggers COBRA continuation once the business had 20 or more employees on more than half of its typical business days last year. Self-insured plans and Section 125 arrangements also face nondiscrimination testing.