Does TRICARE for Life Cover Dependents and Spouses?

TRICARE for Life does cover dependents and spouses, but coverage is not automatic and not shared: each family member has to qualify on their own, and each one must be enrolled in Medicare Part A and Part B to activate the benefit. There is no separate TFL premium. The only recurring cost is the standard Medicare Part B premium, which is $202.90 per month in 2026 for most beneficiaries.¹

Which Family Members Qualify

Federal law sets out who counts as a dependent for military health benefits.² The categories that reach TFL are:

Current spouses of retired service members.
Surviving spouses who have not remarried.
Children under 21, including biological children, stepchildren, adopted children, and children placed in the sponsor’s legal custody by court order for at least 12 consecutive months.
Unmarried children under 23 enrolled full-time at an approved institution of higher learning, if the sponsor provides more than half of their financial support.
Adult children older than 23 who cannot support themselves because of a physical or mental condition that began while they were still an eligible dependent, if the sponsor provides more than half of their support.

Parents and parents-in-law are the notable exclusion. They can qualify as dependents for some other military purposes, but the statute governing TFL specifically leaves them out of this health benefit.³

Former Spouses

A former spouse can keep TRICARE, and eventually transition to TFL, only if the marriage and the sponsor’s service line up in specific ways.

The 20/20/20 Rule

Full TRICARE eligibility, including the later shift to TFL when the former spouse becomes Medicare-entitled, requires all three: the sponsor completed at least 20 years of creditable service, the marriage lasted at least 20 years, and all 20 years of marriage overlapped the 20 years of service. Coverage continues as long as the former spouse does not remarry and does not have employer-sponsored health coverage.⁴

The 20/20/15 Rule

If only 15 of the 20 years of marriage overlapped creditable service, coverage is temporary. For divorces finalized on or after September 29, 1988, TRICARE lasts one year from the date of divorce. Remarriage or enrollment in an employer plan ends eligibility.⁴

The Medicare Part A and Part B Requirement

This is the point where families most often lose coverage they thought was secure. Every dependent who wants TFL must be entitled to Medicare Part A and actively enrolled in Medicare Part B.³ Decline Part B, or let it lapse, and TFL disappears with it. Medicare pays first for most services and TFL wraps around it, so without Medicare there is nothing for TFL to complete.⁵

The rule applies to dependents under 65 too, if they qualify for Medicare through a disability or End-Stage Renal Disease. Active-duty family members approaching the sponsor’s retirement should enroll in Part B before retirement to avoid a gap. A Medicare Special Enrollment Period runs while the sponsor is on active duty and for the first eight months after retirement.⁶

Late Enrollment Penalty

Dependents who miss their Part B window pay a permanent surcharge: 10% added to the standard Part B premium for each full 12-month period the person could have enrolled but did not.⁷ Three years late means 30% more than $202.90 every month, for life.¹ Enrolling outside a Special Enrollment Period also means waiting: the General Enrollment Period runs January 1 through March 31, with coverage starting July 1, and TFL is unavailable in the meantime.

Part D Is Not Required

Dependents do not need a separate Medicare Part D drug plan. TRICARE counts as creditable prescription drug coverage, so there is generally no reason to add Part D and no late-enrollment penalty for adding it later.⁸

What a Covered Dependent Pays

TFL has no enrollment fee and no premium of its own. Each dependent pays their own Part B premium of $202.90 per month in 2026.¹

For services covered by both Medicare and TRICARE, which includes most doctor visits, hospital stays, and outpatient care, dependents typically pay nothing out of pocket. Medicare pays its approved amount, and TFL covers the Medicare deductibles and coinsurance. The 2026 Medicare deductibles TFL picks up are $1,736 per hospital benefit period for Part A and $283 annually for Part B.⁹

For services TRICARE covers but Medicare does not, standard TRICARE cost-sharing applies. The annual catastrophic cap, the most a family can pay out of pocket for TRICARE-covered services in a calendar year, is $3,000.⁹

If a dependent also carries other health insurance, such as an employer plan or a Medicare supplement, TFL still works but pays last, after the other insurance and Medicare have processed their portions.¹⁰

Children Who Age Out Before Medicare

A child loses standard TRICARE at 21, or at 23 if they are a full-time student. Between that cutoff and age 26, they can purchase TRICARE Young Adult (TYA) if they are unmarried, not eligible for their own employer plan, and not otherwise TRICARE-eligible.¹¹ The 2026 premiums are $794 per month for TYA Prime and $363 per month for TYA Select, paid entirely by the family with no government subsidy.¹²

TYA is a bridge, not a form of TFL. A young adult would only move to TFL if they later become Medicare-entitled, typically at 65 or earlier through a qualifying disability.

Getting a Dependent Into the System

Every dependent must be registered in the Defense Enrollment Eligibility Reporting System (DEERS) before using any TRICARE benefit, including TFL. Required documents depend on the relationship:

Spouse: marriage certificate, spouse’s birth certificate, Social Security card, and photo ID.
Child: birth certificate (or Consular Report of Birth Abroad for a child born overseas), Social Security card, and, for a stepchild, the marriage certificate linking the sponsor to the child’s parent.
Adopted child or ward: court order or placement letter from a recognized adoption agency, plus birth certificate and Social Security card.

All documents must be originals or certified copies.¹³ Registration is done on DD Form 1172-2 at a RAPIDS office.¹⁴

Life-Event Deadlines

New family members have to be added quickly. A child must be registered within 90 days of birth, adoption, or placement in the home if the family lives in the United States, or within 120 days overseas. After a marriage, plan changes must be made within 90 days.¹⁵ Missing the window can delay coverage or force a wait for the next open enrollment.

How TFL Turns On

There is no separate TFL application. Coverage activates automatically once DEERS reflects both Medicare Part A entitlement and Part B enrollment. The dependent visits a RAPIDS office for an updated ID card that shows the health benefit’s effective date.¹⁴ Matching the name on legal documents to Social Security Administration records avoids processing delays.

Overseas Care

Outside the United States, the payment order flips. Medicare does not cover services in foreign countries, so TRICARE becomes the primary payer overseas. The dependent must still maintain Part B enrollment to keep TFL eligible, even though Medicare itself pays nothing for that care.¹⁶ With TRICARE as primary, the dependent owes TRICARE’s annual deductible and cost-shares rather than paying nothing at the counter.

1
CMS. 2026 Medicare Parts A and B Premiums and Deductibles
2
Office of the Law Revision Counsel. 10 USC 1072 – Definitions
3
Office of the Law Revision Counsel. 10 USC 1086 – Contracts for Health Benefits for Certain Members, Former Members, and Their Dependents
4
TRICARE. Former Spouses
5
TRICARE. TRICARE For Life
6
TRICARE. Active Duty Family Members
7
Medicare.gov. Avoid Late Enrollment Penalties
8
TRICARE. Medicare-Eligible Beneficiaries
9
TRICARE. What Are My 2026 TRICARE For Life Costs?
10
TRICARE. Using Other Health Insurance
11
TRICARE. TRICARE Young Adult
12
TRICARE. How Much Does TRICARE Young Adult Cost?
13
TRICARE. Required Documents
14
Department of Defense Common Access Card. Getting Your ID Card
15
TRICARE. TRICARE Qualifying Life Events Fact Sheet
16
TRICARE. Using TRICARE For Life Overseas