TRICARE for Life and FEHB: the decision for military feds

1. Why this decision exists for some federal retirees

Most federal retirees don’t face the TRICARE for Life and FEHB choice. They have one retiree health system — FEHB — and the decisions in retirement are about which FEHB plan to carry and whether to add Medicare.

A specific subset has it differently. Federal civilian retirees who also retired from the uniformed services — typically 20 or more years of military service followed by additional federal civilian service — have access to two excellent retiree health systems simultaneously. They can keep FEHB. They can use TRICARE for Life. They can do both. And in the most-overlooked move, they can keep FEHB during their working federal years for the agency premium subsidy, then suspend it in retirement to use TRICARE for Life — saving thousands per year in FEHB premiums while preserving the right to come back.

This article is for that audience. If you’re a military retiree who’s also retiring (or already retired) from federal civilian service, the TRICARE for Life and FEHB decision is one of the most impactful financial choices in your retirement. Done thoughtfully, it can produce $8,000 to $12,000 in annual savings while keeping your safety net intact. Done carelessly — particularly if you cancel FEHB instead of suspending — it can close a door you spent decades earning.

2. What TRICARE for Life and FEHB each are

A quick refresher to ground the comparison, because these two programs work differently.

TRICARE for Life (TFL) is the Department of Defense’s wraparound health plan for military retirees who are Medicare-eligible (typically age 65 and older). TFL acts as secondary coverage to Medicare — Medicare pays first, TFL fills in most of the rest. TFL has no premium beyond the Medicare Part B premium you already pay. Enrollment is automatic once you have both Medicare Part A and Part B and TRICARE eligibility — no application required. It works in the U.S. and U.S. territories. Pharmacy is handled through the separate TRICARE Pharmacy Program (Express Scripts), not Medicare Part D.

FEHB (Federal Employees Health Benefits) is OPM’s health insurance program for federal employees and retirees. FEHB plans are private insurance products that OPM contracts with carriers (Blue Cross, GEHA, Aetna, Kaiser, etc.) to provide. Premiums in retirement are shared roughly 72/28 between the government and you, but the retiree share for 2026 is significant — and the 12.3% premium increase for 2026 follows a 13.5% increase the year before.

The key structural differences:

For most Medicare-eligible military retirees, TFL alone provides comprehensive coverage. The question is whether FEHB on top of it — paying full FEHB retiree premiums for a third layer of coverage — actually buys anything you need.

3. The mandatory step at 65 — Medicare Part B

The single most important rule for anyone considering TFL: you must enroll in Medicare Part B to keep TRICARE for Life.

If you’re a military retiree turning 65 and you don’t sign up for Medicare Part B during your initial enrollment period (the 7-month window around your 65th birthday), TFL coverage stops. There is no “TFL without Part B” option. Part B is the price of admission.

The Part B premium for 2026 — and the income-related surcharges (IRMAA) that can multiply it — are the real cost of TFL:

For a middle-income retired couple, Part B is roughly $4,870 per year ($202.90 × 2 × 12). For high-income retirees in the top IRMAA tier, the household Part B cost can exceed $16,500 a year — and that’s the only premium TFL requires.

The Initial Enrollment Period is non-negotiable. Missing it triggers a permanent late-enrollment penalty — 10% added to the Part B premium for each 12-month period you delayed without other “creditable” coverage. TRICARE is not considered creditable for Part B late-enrollment purposes (FEHB is, while you’re still working). Confirm with SSA that any delayed enrollment qualifies for the FEHB-active-employment exemption before relying on it. (See Medicare Part B at 65 for Federal Retirees for the full late-enrollment penalty mechanics.)

TRICARE for Life is “free” only after you’ve paid the Medicare Part B premium. For a couple in the standard income tier, that’s about $4,870 a year. For a high-IRMAA household, it can exceed $16,500. The premium is real — it’s just being paid to Medicare instead of FEHB.

4. Cost comparison — the dollars side by side

The dollars are where the TFL-vs-FEHB decision tilts decisively for most dual-status retirees. Run the comparison on representative numbers for a retired couple in 2026:

Three observations from the comparison:

The “suspended FEHB, use TFL” strategy saves about $9,600 a year for a typical retired couple. That’s not a one-time savings — it’s recurring. Over a 20-year retirement, the cumulative difference exceeds $200,000 in saved premiums, before factoring in FEHB’s own annual increases. The 12-13% premium increases of recent years magnify the gap further.

Stacking all three (FEHB + Medicare + TFL) is rarely worth it. The third layer of coverage usually duplicates what Medicare + TFL already covers. The added FEHB premium of $800/month buys very limited incremental benefit — generally just a slightly broader provider network and pharmacy access through FEHB instead of Express Scripts. For most retirees, the value doesn’t justify the cost.

“FEHB only” is the worst combination for a military retiree. It pays the full FEHB premium while ignoring TFL entirely. Anyone eligible for TFL who keeps FEHB without enrolling in Part B is paying for both systems and using only one. The combination only makes sense if you’ve explicitly decided against Part B (rare, and triggers TFL termination).

5. Coordination of benefits — who pays first

When you hold multiple types of coverage, the order of payment matters. Understanding the coordination rules helps explain why “stacking” coverage often doesn’t deliver the value its premiums would suggest.

The general rules:

Active federal employee with TRICARE eligibility:

• FEHB pays first
• TRICARE pays second
• This is the only time TRICARE pays second by rule

Retired federal employee with TRICARE for Life (age 65+):

• Medicare pays first
• TFL pays second
• FEHB (if you keep it) pays third — with very limited residual responsibility, since Medicare + TFL typically pick up nearly everything

Retired federal employee with TFL, FEHB suspended:

• Medicare pays first
• TFL pays second
• No third payer — you’re done

The coordination flow for a retired dual-status retiree:

The flow shows why FEHB as third payer rarely earns its premium. Medicare + TFL together cover so much of the cost that FEHB’s residual role is small — yet you’re still paying full FEHB premiums for it. This is why suspending FEHB is the math-driven choice for most dual-status retirees.

6. The strategic move — keep FEHB while working, suspend in retirement

The single most important strategic move for a dual-status federal employee approaching retirement: keep FEHB during your final federal working years, then suspend it after you separate.

Why this works:

Active employees cannot suspend FEHB. This is a firm OPM rule. While you’re still working, you can either be enrolled in FEHB or not enrolled in FEHB. You cannot pause it. That means you can’t “use TRICARE for free during your federal career and pick up FEHB at retirement.” You have to be enrolled at retirement to keep the right to use FEHB later.

The 5-year rule applies. To carry FEHB into retirement at all, you generally need 5 continuous years of FEHB coverage immediately before retirement (or for the full period you’ve been eligible, if less than 5). Time covered under TRICARE counts toward the 5 years as long as you were enrolled in FEHB at the moment of retirement. (See the FEHB 5-year rule for the full mechanics.)

FEHB premiums are subsidized while you work. During your federal career, the government pays roughly 72% of your FEHB premium. That subsidy continues into retirement, but a year of FEHB during your career typically costs you only $1,500-$2,500 in retiree-share premiums — modest insurance for preserving the right to suspend-and-return later.

Suspension at retirement captures the premium savings. Once you’re retired and TFL is active, you submit Form RI 79-9 to suspend FEHB. From that moment, you pay $0 in FEHB premiums while still holding the right to return to FEHB during any future Open Season — or immediately if you involuntarily lose TFL coverage.

The play in chronological order:

1. Final working year: Make sure you’re enrolled in FEHB. If you’d dropped FEHB earlier in your career, enroll during the most recent Open Season before retirement.
2. At retirement: Confirm your retirement application carries FEHB into retirement (Section on SF-3107). You’re now a retired FEHB enrollee.
3. Within weeks of retirement: Submit Form RI 79-9 to OPM Retirement Services along with documentation of your TFL eligibility (Uniformed Services ID, Medicare A+B card showing enrollment). Suspension takes effect at the end of the day before TFL becomes your primary coverage.
4. Going forward: Use TFL for all healthcare. Pay only Part B premiums. Watch the FEHB premium savings stack up year after year.
5. If TFL ever becomes unworkable (move overseas, lose Medicare for some reason, network problems): resume FEHB at the next Open Season or immediately upon involuntary loss.

This sequence is what’s sometimes called the “ace in the hole” arrangement — TFL provides the day-to-day coverage at $0 premium, FEHB sits quietly in suspended state as the safety net.

7. The suspension mechanics

The actual paperwork to suspend FEHB is straightforward, but the details matter.

Form RI 79-9 — titled Health Benefits Cancellation/Suspension Confirmation — is the official OPM form. It’s a two-page document available from OPM Retirement Services. Call 1-888-767-6738 to request a copy, or download it from opm.gov. Check Box D for TFL/TRICARE/Peace Corps/CHAMPVA suspension.

Documentation required:

• A copy of your Uniformed Services ID card
• A copy of your Medicare card showing enrollment in both Part A and Part B (Part B is required for TFL)
• Your CSA claim number (assigned at retirement)
• Your signature

Where to send it:

Timing:

• Submit when you’re ready to suspend, not before. The suspension takes effect the end of the day before your new coverage starts.
• If TFL is already active and you submit RI 79-9, suspension is typically effective at the end of the day before OPM processes the form.
• Process typically takes 2-4 weeks for OPM to confirm.

What you keep:

• The right to return to FEHB at any future Open Season
• The right to return immediately if you involuntarily lose TFL coverage (TRICARE termination, move to area without coverage, etc.)
• Your underlying federal retirement and other benefits — suspension affects FEHB only

What you don’t keep while suspended:

• FEHB premium charges (the whole point)
• FEHB drug coverage
• FEHB medical network access
• Any FEHB-specific benefits like dental discount programs (if your FEHB plan included them)

8. When keeping FEHB over TFL makes sense

The default answer for most dual-status retirees is “suspend FEHB, use TFL.” But there are specific situations where keeping FEHB — even paying the full retiree premium — is the right call.

You live or travel overseas part of the year. Medicare doesn’t cover care outside the U.S. or U.S. territories. TFL is reduced to a smaller backup role overseas (TFL pays first overseas, but you pay up front and file claims for reimbursement). An FEHB plan with international coverage can be meaningfully better for retirees who split time abroad.

Your healthcare needs require providers outside the TRICARE network. Specialty providers, particular hospitals, or specific physicians who don’t take Medicare can sometimes be accessed through an FEHB plan but not through TFL. If you have a specific provider relationship that matters and TFL doesn’t reach them, FEHB may justify its cost.

You’re not Medicare-eligible. TFL requires Medicare A+B. If you’re under 65 and not yet on Medicare, you’re using a different TRICARE plan (TRICARE Prime, Select, etc.) — TFL doesn’t apply. Younger retirees should run a separate comparison; suspension can still work, but the math differs.

Your spouse needs FEHB-specific benefits. Family coverage scenarios get complicated. If your spouse isn’t TRICARE-eligible, or has specific FEHB-network needs, keeping FEHB for family coverage while you personally rely on TFL may be the path. This requires careful tier and enrollment management.

You value redundant coverage and can afford it. Some retirees prefer the belt-and-suspenders comfort of all three layers (FEHB + Medicare + TFL) even when the math doesn’t justify the third layer’s premium. That’s a personal choice. The premium is real, but if peace of mind matters more than the savings, both paths are valid.

For most other dual-status retirees, the math favors suspension. The savings are substantial, the safety net stays intact, and the right to return is preserved through any future change in circumstances. For the broader healthcare-decision framework, see Medicare Open Season Decisions for Federal Retirees.