Life does not wait for open enrollment. When you get married, have a baby, get divorced, or experience other major life changes, your health insurance needs shift immediately. The good news is that these events, known as Qualifying Life Events (QLEs), give you a special window to change your coverage outside of the normal enrollment period.
But the windows are short and the rules are specific. Miss a deadline by even one day, and you could be stuck without the coverage you need until the next open enrollment period. Here is what you need to know for each major life event.
Getting Married
Marriage is a Qualifying Life Event that opens a 60-day Special Enrollment Period on the ACA marketplace and typically a 30-day window for employer-sponsored plans. During this window, you can add your spouse to your plan, switch to your spouse plan, or enroll in an entirely new plan. Newly married couples generally have three paths: one spouse joins the other employer plan, each spouse keeps their own plan, or both enroll together on a marketplace plan.
Choosing between two employer plans is rarely as simple as comparing premiums. Look at the total picture for the year: deductibles, out-of-pocket maximums, whether your doctors sit in both networks, and how each plan covers any prescriptions you take regularly. Some employers also charge a spousal surcharge when a spouse declines available coverage at their own job, which can quietly change the math.
Two details catch people off guard. First, on the federal marketplace, the marriage special enrollment period generally requires that at least one spouse had qualifying coverage during the 60 days before the wedding. Second, marriage changes your subsidy picture: premium tax credits are based on combined household income, and with the 400% of federal poverty level cliff back in 2026, two modest incomes can add up to no subsidy at all. If you are enrolled in a subsidized marketplace plan, report the marriage promptly so your credit is recalculated, rather than discovering a repayment on your tax return.
If one spouse has an employer offer and the other is shopping the marketplace, the affordability test matters: for 2026, employer coverage is considered affordable if the employee share of the premium is no more than 9.96% of household income. Family members are now tested on the cost of family coverage, not just employee-only coverage, so if adding your household to the employer plan is genuinely expensive, your spouse and children may still qualify for marketplace subsidies even though you do not.
Having a Baby
The birth of a child is a QLE that triggers a Special Enrollment Period. Your newborn needs to be added to a health insurance plan within 30 days from the date of birth for employer plans and 60 days for marketplace plans. When you add a newborn within the allowed window, coverage should be retroactive to the date of birth, covering hospital delivery and any NICU stays.
If you miss the enrollment window, your baby may not be covered until the next open enrollment period. A newborn without insurance can face tens of thousands of dollars in uncovered medical bills. This is one of the most important deadlines in health insurance.
A few points worth knowing beyond the deadline itself. The birth opens a special enrollment period for the whole household, not just the baby, so this is a legitimate moment to switch to a plan that fits a family of three better than the one you chose as a couple. Your baby does not have to be on your plan: in many families the child qualifies for Medicaid or CHIP, which use considerably higher income limits for children than for adults, and pairing a CHIP-covered child with parents on an employer or marketplace plan is a common and entirely sensible arrangement. If both parents have employer coverage and the baby ends up on both plans, insurers coordinate using the birthday rule, under which the plan of the parent whose birthday falls earlier in the calendar year pays first.
Adoption and foster placement work the same way as birth: the special enrollment period opens on the date of adoption or placement, and coverage is retroactive to that date. And remember that the baby is a new person on the plan with their own cost-sharing, so check how your plan handles the deductible for a family member before assuming delivery-year expenses are behind you.
Getting Divorced
If you are on your spouse health insurance plan, divorce means you will lose that coverage. This loss of coverage is a QLE that qualifies you for a Special Enrollment Period. Your options include enrolling in your own employer plan within 30 days, enrolling on the ACA marketplace within 60 days, or electing COBRA continuation coverage.
Here is the detail many people, and frankly many HR departments, get wrong: COBRA after divorce lasts up to 36 months, not the 18 months that applies to job loss. Federal law treats the divorced spouse of a covered employee as a qualified beneficiary entitled to the longer period. But there is a catch that forfeits this right constantly: you must notify the plan administrator within 60 days of the divorce or legal separation. Miss that notice and the COBRA right disappears entirely. If a divorce is underway, find out exactly who administers the plan and how notice must be given before the decree is final.
Timing during the proceedings matters too. In most plans you cannot be removed from coverage while you are still legally married, and courts frequently order both parties to maintain existing coverage until the divorce is final. Coverage for children is often addressed in the decree itself, and a qualified medical child support order can require a parent to keep children on an employer plan regardless of custody. If you are the lower-earning spouse, run a marketplace quote at your own post-divorce income before defaulting to COBRA: alone, your income may qualify you for subsidies that the combined household never could have received, and in some cases for Medicaid, which has no enrollment deadline at all.
Death of the Policyholder
The death of a spouse or parent who carried the family coverage is its own qualifying event, and the rules mirror divorce: surviving spouses and dependent children are entitled to up to 36 months of COBRA, and the loss of coverage opens a 60-day marketplace special enrollment period. Grief makes paperwork deadlines feel impossible, but this is one set of dates worth handing to a trusted friend or family member to track. The household income also changes abruptly, which can move survivors into subsidy or Medicaid eligibility they did not have before.
Turning 26 and Aging Off a Parent Plan
Children can stay on a parent plan until age 26. On most employer plans, coverage ends at the end of the month of the 26th birthday; on marketplace plans, it typically runs through the end of that calendar year. Either way, aging out is a qualifying event with the usual windows: 60 days for the marketplace, 30 days for an employer plan of your own. Aging out is also a 36-month COBRA event, though for a healthy 26-year-old, a marketplace plan at entry-level income is almost always cheaper than continuing a parent group plan at full price.
Moving
A move to a new state, or to a new county where different plans are offered, opens a 60-day special enrollment period, provided you had qualifying coverage during the 60 days before the move. Even when a move is exciting rather than disruptive, treat the insurance side seriously: networks are local, your current insurer may not operate in the new state at all, and switching plans mid-year resets your deductible to zero.
The Common Thread
Every event on this list follows the same grammar: a short window, a specific start date, documents to prove the event happened, and consequences that land months later if you guess wrong. Expect the marketplace to ask for verification, whether a marriage certificate, birth record, divorce decree, or proof of your old and new address, and request anything that comes from an employer or insurer early. Whenever an event changes your household size or income, update your marketplace application at the same time, because premium tax credits are reconciled at tax filing and stale information turns into a bill. Life changes quickly; the insurance system forgives almost everything except waiting.