Employer-sponsored health plans often extend coverage to spouses, children, and sometimes domestic partners. To stay compliant, employers should review and update their plan documents and Summary Plan Descriptions (SPDs) each year to reflect current eligibility rules and communicate any changes with an updated SPD or Summary of Material Modifications (SMM). Key requirements include offering COBRA coverage to spouses after divorce (even if coverage was dropped beforehand), not varying coverage by age for children under 26, and reporting and withholding taxes on the fair market value of coverage for domestic partners who are not tax dependents (unless employees pay after-tax).
Legal Spouses
Many employer-sponsored health plans let eligible employees enroll their lawful spouses, even though federal law does not require spousal coverage.
Do Understand the Tax Rules for Spousal Coverage
Employer-paid health coverage for legal spouses is generally nontaxable, and spouses are recognized based on applicable state law. Employers can also let employees pay premiums for spousal coverage pre-tax through a Section 125 cafeteria plan.
Do Provide HIPAA Special Enrollment Rights
Employees can usually add a spouse to health coverage at hire or during annual enrollment. In addition, HIPAA requires plans to offer a special 30-day enrollment window when: (1) an employee marries and wants to enroll a new spouse, or (2) a spouse loses other coverage, such as when their employment or hours change. When a timely request is made, coverage must begin no later than the first day of the month following the plan’s receipt of enrollment.
Don’t Overlook Common Cost-saving Measures
To help manage health plan costs, employers can introduce spousal carve-outs or surcharges for employees whose spouses have access to coverage through their own employers.
- Spousal carve-out: A spousal carve-out may make working spouses with access to their own employer’s health plan ineligible for coverage through the employee or require them to enroll in their own employer’s plan to remain eligible, allowing coordination of benefits between the two plans.
- Spousal surcharge: Add an extra premium when a spouse has access to their own employer’s plan but declines it and stays on the employer plan instead.
These strategies are generally permitted under federal law but must be designed carefully to avoid discrimination concerns and applied consistently across all participants.
You can also consider a spousal incentive HRA, which reimburses out-of-pocket medical expenses tax-free when employees and spouses waive your coverage and enroll in the spouse’s employer plan, reducing the number of covered lives and your overall health care spend.
Don’t Forget About COBRA Continuation Coverage
COBRA requires most private-sector employers with 20 or more employees to offer temporary continuation of health coverage to employees, spouses, and dependent children who lose coverage due to certain life events. Each family member can elect COBRA independently. Many states also have “mini-COBRA” laws that apply to fully insured plans sponsored by smaller employers, so continuation may be required even when federal COBRA does not apply.
Spouses can elect COBRA when coverage ends due to the employee’s termination or reduction in hours, divorce or legal separation, the employee’s death, or the employee’s entitlement to Medicare. COBRA must also be offered if coverage was reduced or dropped in anticipation of a qualifying event, such as an employee removing a spouse from coverage before a divorce. To avoid compliance mistakes, employers may notify any spouse who is dropped from coverage that the spouse must report a divorce to the employer or its COBRA administrator to protect the spouse’s continuation rights.
Children
Most employer-sponsored health plans let eligible employees enroll their children, even though federal law doesn’t require child coverage. However, applicable large employers (ALEs) that fail to offer affordable coverage to full-time employees and their dependents risk ACA “pay-or-play” penalties.
Do Understand the Tax Rules for Dependent Coverage
Employer-sponsored health coverage for children is not taxable through December 31 of the year they turn 26, even if they are not tax dependents. Employers may also allow pre-tax premium contributions for these children through a Section 125 cafeteria plan through that same year.
If a plan allows children to stay covered past age 26, the tax treatment depends on whether they qualify as federal tax dependents. When they do not, employers generally must treat the fair market value of that coverage as taxable income to the employee, unless the employee pays for it on an after-tax basis.
Do Offer Coverage to Full-time Employees and Dependents (ALEs Only)
Under the ACA, ALEs (those averaging 50+ full-time and full-time equivalent employees in the prior calendar year) must offer affordable, minimum value health coverage to all full-time employees and their eligible children through the end of the month in which they turn 26 or risk potential penalties. Eligible children include biological and adopted children, but not stepchildren or foster children. Penalties are only triggered if a full-time employee, not a dependent, receives a subsidy on an Exchange, and employees are ineligible for subsidies when their employer coverage is both affordable and provides minimum value.
Do Provide HIPAA Special Enrollment Rights
Beyond the regular enrollment period, an employer’s health plan must offer special enrollment for dependent children when:
- An employee gains a new dependent through marriage, birth, adoption, or placement for adoption;
- An employee’s dependent child loses other health coverage (for example, due to a job loss);
- An employee’s dependent loses Medicaid or CHIP eligibility; and
- An employee’s dependent becomes eligible for a Medicaid or CHIP premium assistance subsidy
Employers have at least 30 days from marriage, birth, adoption, placement, or loss of other coverage to enroll, and at least 60 days after a Medicaid/CHIP loss or new subsidy eligibility. Coverage generally begins the first day of the month after the plan receives the timely request, except in the case of birth, adoption, or placement, when coverage is retroactive to that date.
Don’t Vary the Terms of Coverage for Children Under Age 26
Under the ACA, group health plans that offer dependent coverage must cover eligible children to age 26. Eligibility is based only on age and the child’s relationship to the employee (biological, adopted, step, or foster), not on factors like financial dependence, residence, student status, employment, or marital status. Plans must offer adult children under 26 the same benefit options and premiums as other dependents, and some states may require coverage beyond age 26 for insured plans.
Don’t Forget About COBRA Continuation Coverage
Dependent children are eligible to elect COBRA when their coverage would otherwise end due to:
- The employee’s termination or reduction in hours
- Loss of dependent status under the plan
- Divorce or legal separation
- The employee’s death
- The employee’s entitlement to Medicare
Each dependent child has COBRA rights that are separate from their parents. Children born to or adopted by a covered employee during COBRA are also qualified beneficiaries with their own COBRA election rights.
Domestic Partners
Some employers extend health coverage to employees’ domestic partners, unmarried adults who live together and share a household. While there is no federal recognition of domestic partnerships, a few states offer rights through domestic partnership or civil union laws, and some require health plans to cover domestic partners. Offering this coverage can be a powerful tool to attract and retain talent, especially when workforce demographics support it.
Do Consider Options for Eligibility Rules
Because there are no universal rules for defining a domestic partner for health plan eligibility, employers set their own criteria or rely on state or local registries. Most require partners to share a residence and financial responsibilities, be at least 18, register if a registry exists, and not be legally married or in another domestic partnership.
Employers often request an affidavit or certification if the partnership is not registered and must also decide whether a domestic partner’s children qualify for coverage, for example, based on residency, dependency, student status, or alignment with existing stepchild or tax-dependent rules.
Do Provide HIPAA Special Enrollment Rights
Domestic partners and their children may have HIPAA special enrollment rights when they’re eligible under the employer’s health plan. If the plan offers domestic partner coverage, employers must allow employees to enroll domestic partners (and their eligible children) midyear when they:
- Lose other health coverage (for example, after a job loss)
- Lose Medicaid or CHIP eligibility
- Become eligible for a Medicaid or CHIP premium assistance subsidy
- Gain a new dependent child through birth, adoption, or placement for adoption
HIPAA also grants special enrollment rights when an employee marries, but because domestic partners are not recognized as spouses under federal law, adding a new domestic partner does not automatically trigger HIPAA special enrollment. Some employers choose to go beyond HIPAA and allow midyear enrollment for new domestic partners; before doing so, they should consult their health insurance carrier or stop-loss provider.
Don’t Forget to Impute Income for Taxable Benefits
Federal law only allows tax‑free health coverage for legal spouses, children to age 26, and tax dependents. A domestic partner’s coverage is tax‑free only if they qualify as the employee’s tax dependent, generally meaning they share the same primary address all year, are part of the employee’s household, receive more than half of their support from the employee, are not anyone’s “qualifying child,” and are a U.S. citizen/national or a U.S./contiguous‑country resident.
When a domestic partner qualifies, coverage can be paid pre‑tax through a Section 125 cafeteria plan. If they do not, employers must treat the value of coverage as taxable income (unless paid after tax), increasing both the employee’s taxable wages and the employer’s payroll taxes. Some employers choose to “gross up” pay to help offset this additional tax impact.
Don’t Offer COBRA Continuation Coverage
COBRA requires group health plans to offer temporary continuation of coverage when a qualifying event causes a loss of coverage. Qualified beneficiaries include employees, their spouses or former spouses, and dependent children who were covered the day before the event. Domestic partners are not qualified beneficiaries and do not have independent COBRA election rights. However, employers may choose to extend similar coverage to domestic partners (with carrier approval), and employees who elect COBRA after a qualifying event may be able to keep or add domestic partner coverage if the plan allows it, including during open enrollment.
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Links and Resources
- Federal regulations regarding HIPAA special enrollment rights.
- “An Employer’s Guide to Group Health Plan Continuation Coverage under COBRA,” a Department of Labor resource