Military dependent ID card eligibility begins with the sponsor and then turns on the family member’s relationship, age, and in some cases financial dependency on that sponsor. Spouses and children under 21 of active-duty members, retirees, Medal of Honor recipients, and veterans rated 100% disabled by the VA qualify as a matter of course. Former spouses, college-age children, incapacitated adult children, legal wards, and parents can also qualify, but each of those categories has its own test to meet.
The Sponsor Has to Qualify First
No family member gets a dependent ID card unless the service member or veteran connecting them to the military falls into an eligible sponsor category. Those categories are:
- Active-duty members of the Army, Navy, Air Force, Marine Corps, Space Force, or Coast Guard.
- Reserve and National Guard members called to active duty for more than 30 days.
- Retired service members receiving or entitled to retired pay.
- Medal of Honor recipients.
- Veterans rated 100% disabled by the VA.
Surviving dependents of deceased active-duty members, retirees, Medal of Honor recipients, and certain deceased Reserve or National Guard members may also qualify for ID cards in their own right.1Military OneSource. How to Get or Renew a Military ID Card for Spouses, Dependents, Veterans and Retirees A veteran with a lower disability rating, or one who separated without retirement, cannot sponsor family members for a dependent ID card.
Current Spouses
A current legal spouse of an eligible sponsor qualifies for a dependent ID card on the strength of the marriage certificate alone. Common-law marriage counts if the state where it was formed recognizes it, but you’ll need either a state-issued common-law marriage certificate or a written statement from a Staff Judge Advocate confirming the marriage.2CAC.mil. DoD Identity and Eligibility Documentation Requirements
Former Spouses: The 20/20/20 and 20/20/15 Rules
Divorce normally ends a spouse’s eligibility. Two exceptions preserve some or all of the benefits, and both hinge on how long the marriage and the sponsor’s service overlapped.
20/20/20
An unremarried former spouse keeps full benefits for life if all three of the following are true:
- The marriage lasted at least 20 years.
- The sponsor served at least 20 years of creditable military service.
- Those 20 years of marriage and 20 years of service overlapped completely.
A former spouse meeting all three conditions keeps commissary, exchange, MWR, and TRICARE eligibility indefinitely, as long as they do not remarry.3TRICARE. Former Spouses Remarriage at any point permanently terminates these benefits.4U.S. Coast Guard Pay and Personnel Center. Former Spouse ID Card and Medical Information
20/20/15
If the marriage and service still each lasted 20 years but the overlap was only 15 to 19 years, the former spouse qualifies for one year of TRICARE coverage from the date of divorce. After that year expires, they have 60 days to elect transitional coverage at their own cost through the Continued Health Care Benefit Program.4U.S. Coast Guard Pay and Personnel Center. Former Spouse ID Card and Medical Information Remarriage ends this benefit too.
A former spouse who does not meet either rule loses dependent eligibility on the date of divorce.
Children Under 21
Federal law defines a dependent child as one who has not yet turned 21.5LII / Legal Information Institute. 10 USC 1072 – Definition of Dependent Biological children, adopted children, and stepchildren all qualify. A stepchild needs the sponsor’s marriage certificate to the biological parent in addition to the usual birth certificate and Social Security card.6TRICARE. Required Documents No financial-dependency test applies at this age.
Full-Time Students Ages 21 to 23
A child between 21 and 23 can keep the dependent ID card by meeting three conditions:
- Enrolled full-time at an accredited college or university pursuing an associate degree or higher.
- Unmarried.
- Dependent on the sponsor for more than 50% of their financial support.
The card expires at the child’s 23rd birthday or graduation, whichever comes first.7TRICARE. Children Turning 21 A letter from the registrar’s office confirming full-time enrollment is what actually extends the card past the 21st birthday.
Incapacitated Adult Children
An unmarried child over 21 who cannot support themselves because of a mental or physical condition can remain on the sponsor’s ID card indefinitely. The condition must have begun before age 21, or before age 23 if the child was a full-time student at that time. The sponsor must provide more than 50% of the child’s financial support and prove that dependency through DFAS.8Defense Finance and Accounting Service. Secondary Dependency – Incapacitated Child (21 Years of Age or Over) DFAS requires periodic redetermination to confirm the sponsor still provides majority support, so this is not a one-time approval.
Legal Wards
A child placed in a sponsor’s legal custody by a U.S. court for at least 12 consecutive months can qualify as a dependent. The ward must live with the sponsor (unless separated by military service or institutional care), depend on the sponsor for more than 50% of their support, and not already be a dependent of another service member.9eCFR. 32 CFR Part 161 – Identification (ID) Cards for Members of the Uniformed Services, Their Dependents, and Other Eligible Individuals Enrollment requires a DFAS letter of approval, the court custody order, a birth certificate, and a Social Security card.6TRICARE. Required Documents
Parents, Parents-in-Law, and Stepparents
Parents, parents-in-law, and stepparents can qualify, but the bar is higher than for spouses or children. The sponsor must provide more than 50% of the parent’s financial support, and the parent must live in the sponsor’s household.9eCFR. 32 CFR Part 161 – Identification (ID) Cards for Members of the Uniformed Services, Their Dependents, and Other Eligible Individuals These individuals are classified as “secondary dependents,” and a financial verification must be completed before they can be registered in DEERS.10Defense Finance and Accounting Service. Secondary Dependency – General Information
If the sponsor doesn’t claim the parent on a tax return, the Worksheet for Determining Financial Support (part of DD Form 137) is used to document that the sponsor covers more than half the parent’s expenses. One branch-specific catch: DFAS only processes secondary dependency determinations for Army and Navy sponsors. Air Force, Space Force, Marine Corps, Coast Guard, NOAA Corps, and Public Health Service sponsors handle this through their own branch.11Defense Finance and Accounting Service. Secondary Dependency – Parent(s)
When a Child Ages Out: TRICARE Young Adult
A child who ages out at 21, or at 23 as a former student, is no longer eligible for a dependent ID card, but they aren’t shut out of TRICARE. TRICARE Young Adult is a premium-based plan available to unmarried adult children between 21 and 26 who aren’t eligible for employer-sponsored coverage.12TRICARE. TRICARE Young Adult It’s a separate purchase, not an extension of the dependent card, and it isn’t cheap. For 2026, monthly premiums are $794 for TYA Prime and $363 for TYA Select.13Health.mil. TRICARE 2026 Costs Briefing
Events That End Eligibility
Eligibility can disappear overnight, and the sponsor is on the hook for updating DEERS when it does. Common triggers:
- Divorce. A former spouse who doesn’t meet 20/20/20 or 20/20/15 loses eligibility on the date of divorce. The sponsor and eligible children have 90 days after a divorce or annulment to change their TRICARE health plan. If an ineligible former spouse keeps using TRICARE, the program can recoup the cost of care.14TRICARE. Getting a Divorce or Annulment
- Remarriage of a former spouse. Permanently ends both 20/20/20 and 20/20/15 benefits, even if the later marriage also ends.
- A child turning 21. Eligibility ends unless the full-time-student or incapacitated-child rules apply.
- Marriage of a dependent child. The student and incapacitated-child extensions both require the child to be unmarried.
- Death of the sponsor or dependent. Survivor eligibility is its own determination and doesn’t happen automatically.
Report changes to DEERS as soon as they happen. Waiting doesn’t preserve benefits; it just builds up a bill for services the family member wasn’t entitled to receive.