Are Small Businesses Required to Provide Health Insurance?

Small businesses are not required to provide health insurance under federal law unless they average 50 or more full-time equivalent employees in the prior calendar year. Below that line, the Affordable Care Act imposes no coverage mandate and no penalty for going without a plan. A few states reach smaller employers with their own rules, and businesses that offer coverage voluntarily may qualify for a federal tax credit worth up to half of what they pay in premiums.¹

The 50-Employee Federal Threshold

The ACA classifies any business that averaged 50 or more full-time equivalent employees during the prior calendar year as an Applicable Large Employer, or ALE. ALEs must offer qualifying health coverage to their full-time workers or risk an IRS penalty. Businesses that averaged fewer than 50 are exempt from that requirement and face no federal penalty for skipping coverage entirely.¹

Most small businesses are safely under the line. The trouble is that the count isn’t a simple headcount, and three quirks push some employers over the threshold when they didn’t expect to.

How to Count Full-Time Equivalent Employees

A full-time employee is anyone averaging at least 30 hours a week or 130 hours in a calendar month. Each one counts as one. Part-time workers are folded in as fractions: for each month, add up their hours (capping any single employee at 120), then divide by 120. Five part-timers working 80 hours apiece in a given month produce 400 hours, or 3.33 FTEs for that month.¹

Do that for every month. Add each month’s full-time count to its part-time FTE count, total the twelve monthly figures, and divide by 12. Round down if the answer isn’t a whole number. A business with 40 full-timers and part-timers generating 7.5 FTEs per month averages 47.5, rounds down to 47, and stays under the line. Push the part-time contribution to 10 FTEs a month and the total lands at exactly 50, making the business an ALE.¹

Seasonal Workers Can Be Excluded

A business that crosses 50 only because of seasonal hiring gets a narrow exemption. The workforce must exceed 50 FTEs for no more than 120 days during the year, and the employees pushing the count over must be seasonal workers. Meet both conditions and the business isn’t treated as an ALE despite the spike.¹

Related Businesses Get Combined

Owners of several companies often assume each one is counted separately. It usually isn’t. Companies with a common owner, or that are related under IRS rules, are combined and treated as a single employer for ALE purposes. If the combined total hits 50, every company in the group is an ALE member, even one that has only a few employees on its own. Penalties are calculated separately for each company, but the coverage obligation applies to all of them.¹

What Qualifying Coverage Looks Like

If you’re an ALE, offering “some” health plan isn’t enough. The coverage must satisfy three separate federal tests.

First, the plan must be minimum essential coverage, a standard most employer group plans meet automatically, and it must be offered to at least 95% of full-time employees and their dependents. Dependents here means the employee’s children under 26. Spouses, stepchildren, and foster children don’t count.²

Second, the plan must provide minimum value, meaning it covers at least 60% of the total expected cost of covered medical services. Most standard group plans clear this bar. Bare-bones plans covering only preventive care, or plans with extremely high deductibles, may not.²

Third, the coverage must be affordable. The employee’s share of the premium for the lowest-cost self-only plan can’t exceed a set percentage of household income. For plan years beginning in 2026, that figure is 9.96%.³ Since employers rarely know an employee’s household income, the IRS lets them measure affordability against W-2 wages, rate of pay, or the federal poverty line. Using any of these safe harbors protects the employer from penalties even if the coverage turns out to be unaffordable based on the employee’s actual household income.⁴

Penalties for ALEs That Fall Short

The IRS doesn’t assess a penalty just because a plan is missing or flawed. The trigger is a full-time employee going to the Health Insurance Marketplace, qualifying for a premium tax credit, and buying a subsidized plan there. Only then does the Employer Shared Responsibility Payment kick in, and it comes in two forms.²

If the ALE didn’t offer minimum essential coverage to at least 95% of full-time employees and their dependents, and even one full-time employee gets a marketplace subsidy, the penalty applies across the entire workforce. For 2026, it’s $3,340 per year for every full-time employee minus the first 30.⁵

If the ALE did offer coverage but it failed the minimum value or affordability test, the penalty is narrower. It applies only to each employee who turned down the plan and got a marketplace subsidy instead. For 2026, that’s $5,010 per year per subsidized employee, capped at what the broader penalty would have been.⁵

Tax Credit for Voluntarily Offering Coverage

Small businesses that offer health insurance even though they don’t have to may qualify for the Small Business Health Care Tax Credit, worth up to 50% of the employer’s premium contribution (35% for tax-exempt organizations).⁶ To qualify, the business must meet all four of these conditions:

Fewer than 25 full-time equivalent employees.
Average annual wages under $65,000 across all employees.
The employer pays at least 50% of the premium cost for employee-only coverage.
The plan is purchased through the Small Business Health Options Program (SHOP) Marketplace.

The full credit goes to the smallest, lowest-wage employers: 10 or fewer FTEs with average annual wages of $30,000 or less. The credit phases out as the employee count and wages climb toward the upper limits.⁷

Rules That Can Still Apply Below 50 Employees

Being under the ACA threshold doesn’t mean federal and state rules ignore your plan. Three obligations reach smaller employers.

90-Day Waiting Period Cap

Any employer that offers a group health plan, ALE or not, must start coverage no later than the 91st day after an employee becomes eligible. Waiting periods longer than 90 days are prohibited under federal rules.⁸

COBRA at 20 Employees

Federal COBRA applies to any employer offering a group health plan that had at least 20 employees on more than half of its typical business days in the prior year. Full-time and part-time employees both count toward the 20. COBRA lets departing employees and their covered family members continue the group health coverage at their own expense after a job loss, reduction in hours, or other qualifying event.⁹

Notice requirements are strict. A general COBRA rights notice must go to each employee and spouse within the first 90 days of coverage, and an election notice within 14 days after the plan learns of a qualifying event. Failing to comply can trigger an excise tax of $100 per affected individual per day, rising to $200 per day when a family is affected. Employers with fewer than 20 workers are outside federal COBRA, but many states have “mini-COBRA” laws that apply to employers with as few as one employee.⁹

State Mandates

Federal law sets the floor. A handful of states go further, sometimes requiring coverage for employees who work a minimum number of hours per week regardless of company size, sometimes imposing payroll assessments or quarterly fees for employees who lack qualifying coverage, and sometimes requiring disclosure forms about workforce coverage status. One state requires coverage for employees working at least 20 hours a week. Because the specifics vary widely in who they cover, what they require, and how they penalize noncompliance, a call to your state’s labor or insurance department is worth making if you employ even a handful of people.

1
Internal Revenue Service. Determining if an Employer Is an Applicable Large Employer
2
Internal Revenue Service. Employer Shared Responsibility Provisions
3
Internal Revenue Service. Rev. Proc. 2025-25
4
Internal Revenue Service. Minimum Value and Affordability
5
Office of the Law Revision Counsel. 26 USC 4980H – Shared Responsibility for Employers Regarding Health Coverage
6
HealthCare.gov. The Small Business Health Care Tax Credit
7
Internal Revenue Service. Small Business Health Care Tax Credit and the SHOP Marketplace
8
eCFR. 45 CFR 147.116 – Prohibition on Waiting Periods That Exceed 90 Days
9
U.S. Department of Labor. An Employee’s Guide to Health Benefits Under COBRA