FEHB Premium Conversion: 5 Critical Facts to Avoid Costly Tax Gaps
The short answer: FEHB premium conversion lets active federal employees pay health premiums with pre-tax dollars. OPM states the tax break is available only to current employees, so it stops at retirement. The premium does not change, but the money paying it becomes taxable income.
What are the key takeaways?
- OPM states the Section 125 tax advantages “are only available to current employees,” so FEHB premium conversion ends at retirement (OPM BAL 00-204).
- The government share does not change — 72% of the weighted average or 75% of a plan’s premium, whichever is less, for “most employees and annuitants” (OPM FEHB Handbook).
- 2026 biweekly weighted average premiums are $451.05 Self Only, $987.73 Self Plus One, and $1,080.60 Self and Family (OPM).
- Retiree premiums paid after-tax may qualify as medical expenses above the 7.5% AGI floor, while premium conversion amounts do not (IRS Topic No. 502).
- Retired public safety officers may exclude up to $3,000 of health premiums paid from an eligible retirement plan (IRS Publication 575).
What is FEHB premium conversion?
Premium conversion is a tax arrangement, not a health plan. OPM describes it as “a ‘pre-tax’ arrangement” and notes that “premium conversion plans are governed by Section 125 of the Internal Revenue Code.”
The effect on a paycheck is quiet but real. Your share of the FEHB premium comes out before taxes are calculated. OPM states: “This means that you save on Federal income tax and FICA taxes (Social Security and Medicare taxes). In most cases, you’ll also save on State income tax and local income tax.”
Two precision points belong here. OPM identifies New Jersey and Puerto Rico as exceptions on the state side. And OPM frames the Social Security tax exclusion as applying to FERS employees, which matters because CSRS employees pay no OASDI tax at all.
Most employees never chose it. OPM states that eligible FEHB enrollees “automatically receive premium conversion tax benefits, unless they waive participation.” OPM adds that “the payroll office will sign you up for Premium Conversion automatically. You don’t need to fill out a form.”
Does FEHB premium conversion continue into retirement?
No. OPM’s answer is unusually direct. OPM was asked whether the pre-tax benefit reaches retirees, survivors and former spouses. “No,” OPM wrote. The reason followed: under section 125, the “tax advantages of a premium conversion plan are only available to current employees.”
OPM’s FEHB Handbook says the same from the other direction. Annuitants and compensationers whose premiums come out of annuities “are not eligible to participate in premium conversion.”
So the reason is statutory rather than administrative. Section 125 cafeteria plans reach current employees. An annuity is not a salary.
Nothing about the coverage changes. The plan, the network and the deductible all continue. Only the tax treatment of your payment shifts.
Why does the same plan cost more after you retire?
Start with what stays fixed. OPM applies the same government share to retirees as to employees. OPM sets the government share by a two-part test. The share is the lesser of two amounts, “for most employees and annuitants.” One is 72 percent of the program-wide weighted average of premiums. The other is 75 percent of the premium for the plan an enrollee selects.
So the premium itself does not jump at retirement. Our post on what federal retirees pay for FEHB covers that arithmetic.
What changes is the tax base. As an employee, your share left your pay before tax was calculated. As an annuitant, it comes out of income you have already been taxed on. OPM describes the mechanism when a working employee waives premium conversion. “You pay tax on the salary received — the amount before the health insurance premium is withheld.” OPM finishes the thought: “Thus, you pay tax on a larger amount of income.”
OPM does not publish a side-by-side comparison of employee and retiree cost, so treat the conclusion as arithmetic rather than an OPM statement. The premium is identical. The after-tax cost of paying it is not.
For 2026, OPM’s rate page lists the biweekly program-wide weighted average premium. It is $451.05 for Self Only, $987.73 for Self Plus One, and $1,080.60 for Self and Family. The biweekly maximum government contribution is $324.76, $711.17 and $778.03 respectively.
How does premium conversion limit your enrollment changes?
Section 125 comes with strings, and they apply while you are working. OPM states that “the opportunity to reduce or cancel your enrollment may be limited by the Internal Revenue Code.” Dropping coverage or moving to Self Only outside Open Season requires a qualifying life event.
Waiving restores that freedom. OPM notes that employees who waive “retain the flexibility, without giving any reason whatsoever.” They may drop FEHB coverage, or move from self and family to self only, at any time.
OPM offers its own view on the trade: “This flexibility is generally of little or no value compared to the tax savings of premium conversion.”
Note the boundary. The restriction targets cancelling or decreasing coverage. Open Season changes remain available either way, and our post on the Self Plus One versus Self and Family decision covers the tier question.
Does premium conversion reduce your Social Security benefit?
Slightly, and OPM says so without hedging. OPM states that “premium conversion may slightly reduce the Social Security benefit you will receive upon retirement.”
The mechanism follows from the tax break. OPM explains: “Paying your premiums with pre-tax money reduces your earnings reported to the Social Security Administration. When you begin to collect Social Security… you may receive a slightly lower Social Security benefit.”
OPM’s own assessment sits alongside it: “For most people, the benefit of having more take-home pay far outweighs the slightly lower Social Security retirement benefit.” The point applies to employees paying Social Security taxes, which excludes CSRS and CSRS-Offset employees.
Can retirees deduct FEHB premiums instead?
Possibly, and the reason is the end of premium conversion itself. IRS Topic No. 502 allows a deduction for medical expenses above a floor. The threshold is 7.5% of adjusted gross income for the year. The IRS lists “amounts paid for insurance premiums to cover medical care” as qualifying.
The IRS also names what does not qualify. Non-deductible items include “employer-sponsored premiums paid under a premium conversion plan, cafeteria plan, or any other medical and dental expenses paid by the plan.” An employee using premium conversion has already received the tax benefit, so no deduction follows. A retiree paying after-tax has not.
Two conditions apply. The deduction requires itemizing, and only the amount above the 7.5% floor counts. Our overview of federal retirement tax planning covers where itemizing tends to matter.
Are there other pre-tax routes for retirees?
Two narrow ones appear in IRS materials.
An HSA can cover some premiums after 65. IRS Publication 969 lists premiums an HSA may pay. One entry covers “Medicare and other health care coverage if you were 65 or older.” The IRS excludes Medigap and other Medicare supplemental policies. Long-term care insurance and continuation coverage also appear on that list. Our post on the HSA triple tax advantage covers the account mechanics.
Retired public safety officers have a separate exclusion. IRS Publication 575 states: “You can exclude from income the smaller of the amount of the insurance premiums or $3,000.” The IRS limits it to an “eligible retired public safety officer.” That covers a law enforcement officer, firefighter, chaplain, or rescue squad or ambulance crew member. The officer must have retired because of disability or at normal retirement age. The distribution must also come from the plan of the employer they retired from. The IRS also blocks double-dipping: “The amount excluded from your income can’t be used to claim a medical expense deduction.”
No OPM page addresses applying that exclusion to a CSRS or FERS annuity, so the federal application is not something OPM documents.
What about reemployed annuitants?
They can participate, which is the exception that proves the rule. OPM draws the line at employment status. Reemployed annuitants “in positions that normally convey FEHB eligibility may participate in premium conversion.”
The enrollment has to move. OPM adds a condition: “the individual must be enrolled as an employee.” Participation “ends on the last day of his/her last pay period as an employee.”
What else do federal employees ask about FEHB premium conversion?
Will my FEHB premium go up when I retire?
The premium and the government share stay the same. What changes is that you pay your share with after-tax dollars.
Can I keep premium conversion by delaying my retirement date?
Premium conversion follows employment, so it continues only while you are an employee. It ends with your final pay period.
Should I waive premium conversion before I retire?
OPM’s published view is that the flexibility gained is “generally of little or no value compared to the tax savings.” The waiver decision affects your working years rather than your retirement.
Does this affect the FEHB five-year rule?
No. Premium conversion is a tax arrangement and does not touch eligibility to carry FEHB into retirement. Our post on the FEHB five-year rule covers that requirement.
Do survivors get premium conversion?
OPM’s BAL 00-204 answer covers “retirees, survivors, and former spouses who are receiving civil service benefits” together, and the answer is no.
Does state tax always drop for employees?
OPM states that “taxes in 49 states and most localities will be reduced,” and names New Jersey and Puerto Rico as exceptions.
Want to see the full retirement cost picture?
Health premiums are one of the few costs that rise in real terms at retirement without the sticker price moving. Fed Pilot runs free federal retirement workshops that walk through health coverage, annuity income and taxes together.
Register for a free Fed Pilot workshop and bring your current FEHB plan details.
