The small business special enrollment period is the one time each year when a small employer that could not meet a carrier's minimums can still get a group health plan. For 2026, it opens on November 15 and closes on December 15.
Many owners miss it because it is not widely advertised. Brokers and carriers know it well. This guide explains the rule in plain English, who qualifies, what the window does not change, and how to add a pre-tax payroll layer so the plan costs less to run.
Key facts (2026):
- Federal rules let an insurer limit small group enrollment to November 15 through December 15 for groups that cannot meet employer contribution or participation rules (45 CFR 147.104, federal regulation).
- Coverage from this window is generally set up to start January 1, 2027 (Word & Brown, 2026).
- Outside the window, carriers often require about 70% of eligible employees to enroll (HHS SHOP guidance, 2013, and Gusto, 2025).
- The window does not waive other carrier eligibility or underwriting rules (Word & Brown, 2026).
- Average single coverage cost $9,325 a year in 2025, and 59% of firms with 10 to 199 workers offered coverage (KFF Employer Health Benefits Survey, 2025).
What Is the Small Business Special Enrollment Period?
The small business special enrollment period is a yearly Affordable Care Act window that runs November 15 through December 15. During it, a small employer that cannot meet a carrier's employer contribution or group participation minimums can still apply for small group coverage.
The rule sits in federal regulation 45 CFR 147.104. It says that for a small group plan that "cannot comply with employer contribution or group participation rules," an insurer "may restrict the availability of coverage" to the annual enrollment period that "begins November 15 and extends through December 15." The words "as allowed under applicable State law" matter, because states set the details.
Do not confuse this with the individual special enrollment period. That one is for people who lose coverage or have a life event. This window is for employers.
| Term | Plain-English meaning |
|---|---|
| Small group plan | A group health plan bought from an insurer by a small employer |
| Participation rule | The share of eligible employees who must enroll, often about 70% |
| Contribution rule | The minimum share of the premium the employer must pay |
| Special enrollment window | November 15 to December 15, when those minimums can be relaxed |
Who Qualifies for the Small Group Special Enrollment Period?
A business qualifies when it counts as a small group in its state, usually 50 or fewer employees, and it could not meet the carrier's usual minimums. Some states define small group as up to 100 employees (Word & Brown, 2026). Gusto's 2025 guidance says at least one full-time employee is needed.
Here is a simple way to check yourself:
- Count your full-time employees and your full-time equivalents, using your state's rule.
- Confirm that you have at least one common-law employee who is not an owner or an owner's spouse. Carrier rules on owner-only groups differ, so ask.
- Ask whether your state allows insurers to limit enrollment to this window for groups that miss contribution or participation minimums.
- Check whether you are an Applicable Large Employer under the ACA employer mandate. This window does not suspend those duties (Word & Brown, 2026).
Some coverage articles say the employer does not have to contribute anything. That can be true for a carrier in a state that allows it. It is not a federal guarantee. Federal rule defers to state law, so get the carrier's written rule before you tell employees.
What Does the Window Change, and What Stays the Same?
The window relaxes participation and contribution minimums only. A carrier can still review eligibility, required documents, and underwriting rules. Word & Brown, a benefits distributor, states that the window "does not waive other eligibility or underwriting requirements."
| Rule | Normal enrollment | Special enrollment window |
|---|---|---|
| Employee participation minimum | Often about 70% | Usually relaxed, per carrier and state |
| Employer contribution minimum | Set by state and carrier | Usually relaxed, per carrier and state |
| Documents and eligibility checks | Required | Still required |
| Coverage start | Varies by application date | Generally January 1, 2027 |
Gusto's 2025 explainer gives one example: "Only one employee needs to enroll to establish your group health plan." Treat that as a best case, and confirm it with the carrier you pick.
One more point. The same article says employers who miss the window face normal participation and contribution rules again until the next one. That is why the dates matter.
Why Do the Deadlines Come Before December 15?
Submission deadlines at brokers and carriers often come before December 15. The federal window closes December 15, but a carrier needs time to process applications and issue January 1 coverage. For example, Word & Brown's 2026 California and Nevada guidance set a broker submission deadline of Friday, December 4, 2026.
Plan to finish your decision by late November. Gather these items first:
- Your federal employer ID number and a business license or tax filing
- A payroll report that lists every employee, hire date and hours
- Employee dates of birth and ZIP codes for quotes
- A list of who would waive coverage, and why
What Does a Small Business Pay for Group Health Insurance?
KFF's 2025 Employer Health Benefits Survey found that average annual premiums were $9,325 for single coverage and $26,993 for family coverage. Workers paid an average of $1,440 for single coverage and $6,850 for family coverage. Small firms often pass more cost to workers: average family worker contributions were $8,889 at small firms, compared with $6,227 at larger firms.
Small firms also carry higher deductibles. KFF reports an average single deductible of $2,631 at small firms in 2025. Because of this, many small employers choose level-funded or lower-premium plan designs. Our level-funded health plan guide shows how those work.
If you cannot pay a large share of the premium, the special enrollment window helps. It lets you offer the plan and let employees pay their share. Our employer contribution split guide explains common formulas.
Who Handles the Payroll and Tax Side of a New Group Plan?
Your insurance carrier or broker handles the policy. A Section 125 plan administrator handles the payroll tax side. Summit Health Benefits administers Section 125 cafeteria plans, including the written plan document, the summary plan description, and nondiscrimination testing support, with plan documents reviewed by ERISA attorneys.
A Section 125 plan lets employees pay their share of premiums with pre-tax payroll deductions. That cuts income tax for employees and cuts payroll tax for you. The IRS sets the employer FICA rate at 7.65%, so every pre-tax premium dollar saves the employer 7.65 cents. Our Section 125 guide covers the rules, and our FICA savings breakdown shows the math.
Summit's pricing: The administration fee is $35 per enrolled employee per month. It is paid from the employer FICA savings the plan creates. Summit estimates employer FICA savings of about $91 to $136 per enrolled employee per month, so the employer nets about $56 to $101 per enrolled employee per month. Savings depend on how much each employee pays pre-tax.
Worked example: An employee pays $400 a month toward a group premium pre-tax. The employer avoids FICA of $30.60 a month ($400 x 7.65%) on that deduction alone. The employee also avoids income tax and the employee's own 7.65% FICA. These numbers are examples. Your savings depend on contributions and payroll.
Use the Summit savings calculator for a first estimate, or read how employee premium contributions work in a cafeteria plan.
The Summit Cafeteria Plan
A Section 125 plan with the plan document, summary plan description and nondiscrimination testing support built in. Compare Summit plans or build your plan.
What Are Your Options if You Miss the Window?
If you miss December 15, normal participation and contribution rules return, and you may have to wait for the next window (Gusto, 2025). Three options exist in the meantime.
- QSEHRA: The qualified small employer health reimbursement arrangement lets a small employer reimburse employees tax-free for individual premiums. See our QSEHRA guide for small business.
- ICHRA: An individual coverage HRA has no minimum participation rate. Our ICHRA vs group health insurance comparison shows when it fits.
- Other group designs: Our small business health insurance alternatives guide lists more.
The federal Small Business Health Care Tax Credit has its own employer size, wage, and contribution rules, and it is separate from this window. Read our tax credit guide before you assume you qualify.
What Should a Small Business Owner Do Before December 15?
Start now, since the window opens in 20 days. Use this order.
- Confirm eligibility. Check your headcount and your state's small group definition.
- Get quotes. Ask a broker for at least three plans and request each carrier's written rule on participation and contribution during the window. Our group health insurance quotes checklist lists what to ask.
- Decide your contribution. Even a small employer share can raise enrollment. Employees who have other coverage may still waive.
- Add the pre-tax layer. Set up a Section 125 plan so employee deductions are pre-tax from the first January paycheck.
- Submit early. Send the application at least a week before the carrier's deadline.
Schedule a Time to Set Up Your January 1 Group Health Plan Savings
A Summit benefits expert will review your headcount and show what a Section 125 plan would save on top of the group plan you pick.
Frequently Asked Questions
When is the small business special enrollment period in 2026?
Does a small business have to contribute to employee premiums during the special enrollment window?
How many employees must enroll in a small group plan during this window?
Can a business with one employee use the small group special enrollment period?
What happens if my small business misses December 15?
Can I add a Section 125 plan to a new group health plan?
Is the small business special enrollment period the same as an individual special enrollment period?
Sources: 45 CFR 147.104, Cornell Legal Information Institute copy of the federal regulation (accessed October 2026). Word & Brown, 2026 Small Group Annual Special Open Enrollment Window guidance. Gusto, What Is the Small Group Special Enrollment Period, December 2025. HHS SHOP FAQ 30, July 2013. KFF, 2025 Employer Health Benefits Survey. IRS, employer FICA rate of 7.65%. Terry Savage column, October 22, 2026, as republished by CPA Practice Advisor.