Last Updated: September 9, 2026 Reading Time: 8 min

FEHB covers your child until the day they turn 26, whether or not they are in school, married, living with you, or on your tax return. What confuses people is what happens on that birthday, and what to do with your own enrollment afterward. Here are the questions federal parents ask most, then the numbers on what dropping to Self Plus One is worth on eight plans.

Your Age-26 Questions, Answered

Does FEHB stop covering my child when they graduate college, get married, or move out?

No. None of those events matter. FEHB and PSHB cover a child regardless of student status, marital status, where they live, or whether you support them financially. The only test is age. Coverage continues until the child's 26th birthday.

OPM's eligibility page says so in one line, and it is the rule most people get wrong.

Does my child's coverage run through the end of the month they turn 26?

No, and this is the most common mix-up. FEHB and PSHB coverage as a family member ends on the 26th birthday itself, at midnight. There is no end-of-month convention like many private plans use. What you get automatically is a 31-day extension at no cost that starts the day of the birthday.

Carriers are required to send you written notice at least 60 days before it.

What do I have to do when my child turns 26?

The carrier removes the child automatically; you do not file paperwork to drop them. Two things need action: notify your employing office within 60 days if your child wants Temporary Continuation of Coverage, and decide whether to change your own enrollment type from Self and Family to Self Plus One or Self Only.

What are my child's options after the 31-day extension?

Temporary Continuation of Coverage for up to 36 months at 102% of the full premium (the enrollee share plus the government share plus a 2% fee), or conversion to an individual policy with the same carrier with no medical underwriting. For a healthy 26-year-old, an ACA Marketplace plan is usually cheaper than either.

Can I drop to Self Plus One right away, or do I have to wait for Open Season?

You do not have to wait. A child aging out is a qualifying life event (a decrease in eligible family members, code 1C), which opens a 60-day window to change your enrollment type. If you miss it, the next chance is Open Season, November 9 through December 14, 2026.

The full list of events is in our FEHB qualifying life events guide.

Will dropping to Self Plus One actually save money?

It depends on the plan. On 2026 rates, the annual enrollee-share savings run from $53.88 (MHBP Standard) to $1,216.28 (BCBS Standard). On Aetna HealthFund HDHP, Self Plus One costs $1,200.16 more per year than Self and Family because of how the government contribution caps land. Check your plan before you switch.

The table below has all eight.

Can my grandchild be covered under my FEHB plan?

Not automatically. A grandchild qualifies only under the foster-child rules: living with you, in a parent-child relationship with you rather than the biological parent, financially dependent on you, and expected to be raised to adulthood by you. Your agency will ask for documentation.

My stepchild still lives with me after my divorce. Are they still covered?

They can be. Under 5 CFR 890.302, a stepchild stays eligible after your divorce from, or the death of, the child's parent as long as the child continues to live with you in a regular parent-child relationship.

Can a disabled adult child stay on FEHB past 26?

Yes. A child who is incapable of self-support because of a physical or mental disability that began before age 26 stays eligible with no age ceiling. You need a physician's certification that the condition is expected to last at least a year, and the carrier can ask for re-certification later.

Does PSHB work the same way for children turning 26?

Yes. The Postal Service Health Benefits Program uses the same under-26 rule, the same disabled-adult-child exception, and the same 31-day extension and TCC mechanics. Postal families follow the same timeline.

The Timeline Around the 26th Birthday

When What happens Who acts
60+ days before the birthday Carrier sends written notice that coverage will end Carrier
The 26th birthday (midnight) Family-member coverage ends; the 31-day no-cost extension begins automatically Nobody
Within 60 days of the birthday Enrollee tells the employing office if the child wants TCC and provides the child's address You
Within 60 days of the later of the birthday or the TCC notice Child elects TCC Your child
Within 60 days of the birthday Enrollee may change enrollment type under QLE code 1C You
Day 32 onward Coverage continues only under TCC, a conversion policy, or new insurance Your child
Up to 36 months after the birthday TCC ends Carrier

The two 60-day clocks cause most of the trouble. Yours runs from the birthday and covers the notification. Your child's runs from whichever comes later, the birthday or the date HR issues the TCC notice, and covers the election itself. A parent who assumes "I told HR" equals "my kid is enrolled" can leave the child uninsured on day 32.

What Dropping to Self Plus One Saves, Plan by Plan

Fewer people covered should mean a lower premium. On most plans it does. On some it does not, because of how OPM's government contribution works. The government pays the lesser of 75% of the total premium or a fixed dollar cap for each enrollment type. In 2026 the biweekly caps are $711.17 for Self Plus One and $778.03 for Self and Family. When a plan's Self Plus One total premium runs far above its cap while its Self and Family premium sits closer to the higher cap, the enrollee share can invert.

We computed the enrollee share for both tiers on eight nationwide plans from OPM's published 2026 biweekly totals, then annualized over 26 pay periods.

Plan Self and Family (your share, biweekly) Self Plus One (your share, biweekly) Annual change if you drop to Self Plus One
BCBS Standard Option $457.66 $410.88 Save $1,216.28
GEHA Standard Option $231.45 $186.51 Save $1,168.25
GEHA HDHP $215.63 $175.47 Save $1,044.10
BCBS Basic Option $356.86 $319.25 Save $977.86
Aetna Direct $207.79 $180.70 Save $704.40
FEP Blue Focus $157.98 $143.63 Save $372.84
MHBP Standard Option $218.20 $216.12 Save $53.88
Aetna HealthFund HDHP $279.69 $325.85 Costs $1,200.16 more

FedTools 2026 analysis of OPM's 2026 FEHB biweekly premiums (fehb-plans-2026.ts, OPM-verified), applying the government-contribution formula (lesser of 75% of the total or the $711.17 / $778.03 biweekly caps) to each tier; annual figures are the unrounded biweekly difference times 26, rounded once at the end. Non-Postal, nationwide-priced plans only.

Look at the Aetna HealthFund row. Its Self Plus One total premium ($1,037.02 biweekly) blows past the $711.17 cap, leaving you $325.85. Its Self and Family total ($1,057.72) is only slightly higher, but the $778.03 cap absorbs most of it, leaving you $279.69. Dropping a covered child on that plan raises your premium by $46.16 a pay period. This is one slice of a wider pattern; our Self Plus One vs. Self and Family analysis found the inversion in 196 of 478 rate combinations across the program.

MHBP Standard cuts the other way. A $53.88 annual difference is not worth a mid-year enrollment change if there is any chance another child, a spouse, or a foster child comes back onto the plan within the year.

Where This Meets the Verification Crackdown

Two separate FEHB integrity rules are running at the same time as the age-26 rule, and they change how quickly a mistake gets caught. Since July 4, 2026, agencies verify 100% of family members added through a qualifying life event. Starting November 9, 2026, they verify 100% of family members added during Open Season, up from a 10% sample. A retroactive three-year audit of already-enrolled dependents began in July.

None of that affects a child under 26 who is legitimately yours. It does mean a child who aged out and was never removed will surface, and the enrollee, not the child, answers for the premiums the government paid. Our dependent verification audit guide and the 2027 Open Season verification piece cover what documents to have ready.

Compare Your Plan's Tiers Before You Switch

Use our free FEHB Premium Calculator to see the Self Plus One and Self and Family enrollee shares for your exact plan, then decide whether the 60-day window is worth using. Compare your tiers →

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