TRICARE dependent coverage is one of the most generous health benefits available to military families, but it ends abruptly at age 21 for most children and age 23 for full-time college students. That cutoff, sometimes called the TRICARE young adult coverage cliff, often catches families off guard. Unlike civilian employer plans that follow the ACA's age-26 rule, TRICARE operates under a different federal statute that sets a lower age threshold. The good news: losing TRICARE dependent coverage qualifies as a loss-of-qualifying-health-coverage event under the ACA, which triggers a 60-day Special Enrollment Period (SEP) for the Marketplace. Most young adults who lose TRICARE at 21 or 23 have four realistic pathways: purchasing TRICARE Young Adult (TYA) as a premium-based continuation option, enrolling in an ACA Marketplace plan with subsidies, qualifying for Medicaid if income is low, or bridging through the Continued Health Care Benefit Program (CHCBP). Choosing the right option within the tight deadlines can save thousands of dollars per year.
Understanding the timing matters enormously. TRICARE coverage for standard dependents ends on the 21st birthday itself, not at the end of the birth month the way most ACA-governed employer plans work. For full-time college students with sponsor financial support exceeding 50%, coverage extends to age 23 or the date of graduation, whichever comes first. The 30-day TYA enrollment deadline runs from the date regular TRICARE ends, while the 60-day ACA Marketplace SEP window also starts from that loss date. Both clocks run simultaneously. Most young adults should compare ACA Marketplace costs against TYA before defaulting to TYA, because ACA subsidies based on the Medicaid income limits and ACA income limits often make Marketplace plans cheaper than TYA Select's $363/mo premium, especially at low incomes that would also trigger Medicaid eligibility. Check your options using the federal poverty level table below and the ACA income limits calculator to determine whether Medicaid or a subsidized Marketplace plan beats TYA on cost.
7 Steps to Get Coverage
Common Mistakes That Cost People Thousands
The costliest mistakes military families make when a young adult ages off TRICARE:
- Defaulting to TYA without comparing Marketplace costs. TYA-Select at $363/mo is often more expensive than a subsidized ACA Marketplace Silver plan for someone earning under $45,000/year in 2026. Run the comparison at healthcare.gov before enrolling in TYA.
- Missing the 30-day TYA enrollment deadline. TYA requires enrollment within 30 days of losing regular TRICARE coverage (when transitioning from regular TRICARE to TYA). The 60-day window applies only to the ACA Marketplace SEP. Missing the 30-day TYA deadline means TYA is no longer available until the next qualifying event.
- Not checking Medicaid first. A recent graduate or part-time worker earning under $22,025 in 2026 qualifies for free Medicaid in expansion states. Medicaid enrollment is year-round with no premium, making it the best option if income qualifies.
- Assuming TYA is the only TRICARE continuation option. CHCBP is a separate bridge program available for 60 days from TRICARE loss, useful if you have a job offer pending and just need short-term coverage until employer benefits start.
- Assuming TYA is available even with an employer plan. TYA explicitly requires that you are not eligible for employer-sponsored health insurance through your own employment. Getting a job that offers health benefits disqualifies you from TYA, even mid-year.
- Missing the 60-day ACA Marketplace SEP window entirely. Without a qualifying life event SEP, you cannot enroll in a Marketplace plan outside of Open Enrollment (November 1, 2026 to January 15, 2027 for 2027 coverage). A coverage gap of months means any medical care is paid entirely out of pocket.
The TRICARE Age-Out Cliff: Age 21 vs Age 23 Explained
TRICARE dependent coverage does not follow the ACA's age-26 rule. Federal law governing TRICARE (10 U.S.C. Section 1072) sets a lower threshold, ending regular dependent coverage at age 21. The sole exception for a later cutoff: a child must be enrolled full-time at an accredited institution of higher learning AND the military sponsor must provide more than 50% of the child's financial support. Meeting both conditions extends TRICARE through the 23rd birthday or the date of graduation, whichever comes first. Partial enrollment, online-only programs that are not accredited, or financial independence from the sponsor all eliminate the age-23 extension. Military families should confirm annually with DEERS (Defense Enrollment Eligibility Reporting System) whether the student still meets the extension criteria. DEERS updates can be made by calling 1-800-538-9552 or visiting a uniformed services ID card office.
Losing TRICARE at 21 or 23 is classified by CMS and healthcare.gov as a loss of qualifying minimum essential coverage, which triggers the same 60-day ACA Marketplace Special Enrollment Period available to anyone who loses other government health coverage (such as Medicaid or an employer plan). The SEP clock starts the day after coverage ends. You can also apply for the SEP up to 60 days in advance if you know your coverage end date. Military children who lose TRICARE in the middle of a plan year should act immediately: the 60-day clock runs even if you do not receive formal notification from TRICARE, and missing it forfeits access to subsidized Marketplace plans until the next ACA Open Enrollment in November 2026.
Medicaid Eligibility After Losing TRICARE in 2026
Losing TRICARE at 21 or 23 often coincides with starting a first job, graduating college, or entering a period of lower income that creates Medicaid eligibility for the first time. Medicaid is income-gated at 138% FPL in the 40 expansion states plus DC. For 2026, that means $22,025 for a single person and $45,540 for a family of four. State programs have distinct brand names that matter for enrollment: California's Medi-Cal, Arizona's AHCCCS, Massachusetts's MassHealth, Wisconsin's BadgerCare, New Jersey's NJ FamilyCare, Connecticut's HUSKY Health, and Oregon Health Plan all use the same 138% FPL expansion threshold. The 10 non-expansion states (Alabama, Florida, Georgia, Kansas, Mississippi, South Carolina, Tennessee, Texas, Wisconsin prior to expansion, Wyoming) generally do not cover non-disabled adults below 100% FPL, leaving a coverage gap that neither Medicaid nor ACA subsidies can fill. Apply year-round at healthcare.gov or your state Medicaid agency. Medicaid enrollment is not subject to the 60-day SEP window.
TYA Eligibility Rules: Who Qualifies and Who Does Not
TRICARE Young Adult has stricter eligibility rules than the ACA's age-26 dependent coverage standard. Four conditions must all be met simultaneously: (1) the applicant must be unmarried; (2) must be between ages 21 and 26 (or 23 and 26 for those who used the student extension); (3) must not be otherwise eligible for regular TRICARE coverage; and (4) must not be eligible for employer-sponsored health insurance through their own employment. The employer-sponsored-coverage disqualifier is the most commonly misunderstood rule. Getting a job that offers health benefits, even if you decline to enroll, eliminates TYA eligibility. Seasonal or part-time employment that technically offers minimum essential coverage also counts. If eligibility is lost mid-year (because you marry, get a job with benefits, or turn 26), TYA coverage ends immediately and a 12-month purchase lockout applies if the termination was voluntary. Military sponsors must be active duty, retired, activated or non-activated Guard and Reserve members, or certain unremarried former spouses.
Frequently Asked Questions
When exactly does regular TRICARE coverage end for a dependent child?
Regular TRICARE dependent coverage ends on the dependent's 21st birthday under 10 U.S.C. Section 1072. The only exception: if the child is enrolled full-time at an accredited institution of higher learning AND the military sponsor provides more than 50% financial support, coverage can extend to the 23rd birthday or graduation date, whichever comes first. Unlike ACA-governed plans that run through the end of the birth month, TRICARE ends on the actual birthday. Confirm your exact end date with DEERS at 1-800-538-9552 or through milConnect.
How long is the TRICARE Young Adult enrollment window after losing regular TRICARE?
You must submit your TYA application and initial two-month premium payment within 30 days of losing regular TRICARE dependent coverage. This is a strict deadline. If you miss the 30-day TYA window, you cannot enroll in TYA until the next qualifying event occurs (such as becoming eligible again due to a sponsor status change). The ACA Marketplace SEP window is separate and longer at 60 days. You may be pursuing both options simultaneously.
Is TYA cheaper than an ACA Marketplace plan after losing TRICARE at 21?
For most young adults at typical early-career incomes, ACA Marketplace plans with subsidies are cheaper than TYA. TYA-Select costs $363/mo in 2026 with no income adjustment. A 21-year-old earning $30,000/year in 2026 typically qualifies for premium tax credits that bring a Silver Marketplace plan to $50 to $120/mo. At incomes above 400% FPL (about $63,840 for a single adult in 2026), subsidies phase out and TYA-Select becomes more price-competitive. Use the healthcare.gov plan finder to compare actual quotes for your ZIP code before enrolling in TYA.
Does getting a job disqualify me from TYA?
Yes, if your employer offers health insurance. TYA eligibility requires that you are not eligible for employer-sponsored health insurance through your own employment. If you get a job that offers a qualifying health plan, you lose TYA eligibility even if you choose not to enroll in the employer plan. This is different from the ACA's age-26 dependent rule, which does not have an employer-offer disqualifier. If you lose a job and lose access to employer coverage, you may regain TYA eligibility if you are still under 26 and meet the other criteria.
What is the CHCBP and is it worth buying after TRICARE ends?
The Continued Health Care Benefit Program (CHCBP) is a temporary bridge that extends TRICARE-equivalent coverage for up to 18 months after you lose TRICARE eligibility. Purchase it within 60 days of TRICARE loss through Humana Military at 1-800-444-5445. CHCBP costs $2,103 per quarter in 2026, roughly $701/mo, which is nearly double TYA-Select's $363/mo premium and far more than most subsidized Marketplace plans. CHCBP is worth considering only if you need coverage for 60 days or less while waiting for employer benefits to start, or if you are briefly ineligible for both TYA and the Marketplace SEP.
What documents do I need to prove TRICARE loss for the ACA Marketplace SEP?
Healthcare.gov requires documentation of TRICARE coverage loss to activate the loss-of-coverage SEP. Acceptable documents include a TRICARE disenrollment notice, a letter from your TRICARE regional contractor confirming your coverage end date, or a printout from milConnect showing TRICARE eligibility has ended. You must submit this documentation within 30 days of selecting a Marketplace plan, or your enrollment may be cancelled. If you do not have documentation ready, contact your TRICARE regional contractor: East Region 1-800-444-5445 or West Region 1-888-874-9378.
Can I qualify for Medicaid if I just lost TRICARE at 21?
Yes, if your income qualifies. In the 40 Medicaid expansion states plus DC, anyone whose projected 2026 income is under 138% FPL qualifies for free Medicaid year-round. For a single adult in 2026, that threshold is $22,025. Many recent college graduates or part-time workers who lose TRICARE at 21 or 23 fall below this level during their first year post-TRICARE. Apply at healthcare.gov or your state Medicaid agency at any time. Medicaid is not bound by the 60-day SEP deadline. State-named programs include Medi-Cal (California), AHCCCS (Arizona), MassHealth (Massachusetts), and BadgerCare (Wisconsin).
What happens when TYA itself ends at age 26?
TRICARE Young Adult coverage ends on the day you turn 26. Turning 26 is a qualifying life event that triggers a 60-day Special Enrollment Period for the ACA Marketplace. The process is the same as losing any other qualifying health coverage: apply at healthcare.gov, select the loss-of-coverage SEP, and submit documentation showing TYA coverage has ended. You may also be eligible to enroll in an employer plan within 30 days of the TYA loss date if your employer offers coverage. Medicaid enrollment remains year-round if income qualifies.
