The FEHB 5-Year Rule: How to Keep Your Health Insurance in Federal Retirement

Of all your federal retirement benefits, there's one that people assume is automatic. It isn't. And when it goes wrong, there is usually no do-over.

I'm talking about your health insurance. Keeping FEHB (or PSHB, if you're a postal employee) into retirement is one of the most valuable things you'll ever walk away with. The government keeps paying its share of your premium for the rest of your life. Your coverage follows you into your 70s, 80s, and beyond. Your spouse can stay covered too, if you set it up right.

But all of that hangs on one rule most people have never read: the 5-year rule. And with Open Season running from November 9 through December 14, 2026, this is exactly the right moment to make sure you're on the right side of it.

What the FEHB 5-Year Rule Actually Says

According to OPM, to carry your health coverage into retirement you generally need two things:

1. You must retire on an immediate annuity. That includes regular retirement, early-out retirement, disability retirement, and MRA+10.
2. You must have been continuously enrolled (or covered as a family member) in an FEHB plan for the 5 years of service immediately before your annuity starts. If you've had less than 5 years of opportunity, the test is the full period since your first chance to enroll.

That's it. Two sentences. And yet those two sentences decide whether you have subsidized health insurance for the next 30 years or whether you're shopping on the open market at 60 with no employer contribution.

Let me be direct: this is not a small number. The government's share of an FEHB premium is set by formula, generally around 72% of the program's weighted average premium, capped at 75% of any single plan's cost. Over a 25- or 30-year retirement, losing that contribution can easily add up to six figures in premiums you'd be paying on your own.

The Three Ways People Trip Over the 5-Year Rule

The system was not designed to explain itself. Nobody sends you a reminder five years out that says, “Hey, your health insurance in retirement depends on what you do right now.” So here's what catches people off guard.

1. Dropping FEHB to save money

Imagine a federal employee, we'll call him Marcus, whose spouse has great coverage through a private employer. Marcus cancels his FEHB in his early 50s to save on premiums. Smart, right? Then at 58 he decides to retire. He hasn't been continuously enrolled for the 5 years before retirement, so he can't take FEHB with him. And when his spouse retires and loses that private plan, the household has no federal coverage to fall back on.

Here's the nuance: being covered as a family member counts, but only when the person covering you is enrolled in FEHB. A spouse's private employer plan doesn't count toward your 5 years.

2. Assuming military health coverage counts on its own

OPM does let time under TRICARE count toward the 5 years, but only if you're covered under an FEHB enrollment when you retire. If you're a veteran using TRICARE as your primary coverage, that detail matters a lot. Get enrolled in FEHB before retirement, not after.

3. Leaving before you're eligible for an immediate annuity

If you separate before your Minimum Retirement Age and take a deferred retirement later, you generally cannot bring FEHB back. Same with a FEGLI policy. People leave for a private-sector job at 52 thinking they'll “pick it back up” when their pension starts. They can't. That's one of those rules that genuinely catches people off guard, and it shouldn't.

Postal Employees: What the PSHB Switch Means for You

Y'all went through a big change when the Postal Service Health Benefits Program replaced FEHB for most postal employees and annuitants starting with 2025. The good news: the move to PSHB didn't reset your clock. Your continuous enrollment history still matters, and the same core rule applies. You need continuous coverage for the 5 years before retirement (or since your first opportunity) to carry PSHB into retirement.

Where postal employees need to slow down is Medicare. For many PSHB enrollees, Medicare Part B enrollment is tied to keeping PSHB coverage once eligible. That's a separate decision from the 5-year rule, but it interacts with it, and it's worth confirming your specific situation with your plan and HR before you retire.

How to Use Open Season to Protect Your Federal Retirement Benefits

Open Season isn't just for comparing premiums. It's your annual chance to fix a coverage gap before it becomes permanent. Here's what I'd want you to check before December 14:

• Are you enrolled right now? If you're within roughly 5 years of retirement and not enrolled in FEHB or PSHB, Open Season is your window to start the clock.
• Is the right enrollment type in place? If you want your spouse covered in retirement, make sure you're in a Self Plus One or Self and Family enrollment, and plan to elect a survivor annuity so they can keep coverage if you pass first.
• Is your coverage under the right person? If you're covered as a family member under another federal employee's enrollment, understand what happens to your coverage if that person leaves federal service or you divorce.
• Does your plan still make sense for retirement? Premiums for 2027 went up. Compare plans with your retirement age, Medicare timing, and prescriptions in mind, not just this year's paycheck.

One Open Season choice made five years early can protect an entire retirement. One skipped can quietly undo it.

The Bigger Picture: Plan It Correctly

Health coverage is one of the five decisions every federal employee makes at retirement, along with your retirement date, survivor benefit, TSP withdrawal strategy, and FEGLI. Most people make them one at a time, with whatever HR handed them. But they're connected. Your survivor election affects your spouse's health coverage. Your retirement date affects your 5-year clock. Your health plan affects how you use Medicare.

Federal employees have earned one of the most powerful retirement packages in America. The biggest threat to collecting it isn't the government. It's not knowing how to maximize what you actually have. You are sitting on something valuable. Treat it that way.

So here's your reflection question: if you retired five years from today, would you be eligible to keep your health insurance, and would your spouse? If you can't answer that with total confidence, that's the conversation to have now, while you still have time to fix it.

Book a free strategy call at fedsecure.org and we'll walk through your 5-year rule, your survivor benefit, and how they fit together, so you make the right decisions at the right time.

Frequently Asked Questions

What is the FEHB 5-year rule?

The FEHB 5-year rule requires you to be continuously enrolled in FEHB, or covered as a family member under someone else's FEHB enrollment, for the 5 years of service immediately before your retirement annuity begins. You must also retire on an immediate annuity to keep coverage.

Does MRA+10 retirement let me keep FEHB?

Yes. MRA+10 is an immediate annuity, so you can keep FEHB if you meet the 5-year rule. If you postpone your MRA+10 annuity to reduce the age penalty, your coverage is suspended and can be reinstated when your annuity starts.

Does a spouse's private employer health plan count toward the 5-year rule?

No. Only coverage under an FEHB enrollment counts, either your own or as a family member on another FEHB enrollee's plan. Coverage under a non-federal employer plan does not count toward the 5 years.

Can I get FEHB back if I take a deferred retirement?

Generally, no. Employees who separate before they're eligible for an immediate annuity and later take a deferred annuity cannot reenroll in FEHB in retirement.

When is Open Season for 2027 health coverage?

The 2026 Federal Benefits Open Season runs from November 9 through December 14, 2026. Changes you make take effect for the 2027 plan year.