If I retire from USPS after January 1, 2025, do I have to enroll in Medicare Part B to keep my health insurance?

Yes, unless you qualify for an exemption. If you were under age 64 on January 1, 2025 and you retire after that date, you must enroll in Medicare Part B when you become eligible (typically at age 65) to maintain PSHB coverage. Failure to enroll does not immediately terminate your coverage — you receive one opportunity to enroll at the next available Medicare enrollment period under 5 CFR 890.1608(b) — but if you miss that too, your PSHB coverage ends and cannot be reinstated.

How much does Medicare Part B cost USPS retirees in 2026?

The standard 2026 monthly premium is $202.90 per person ($2,434.80/year). Higher earners pay IRMAA surcharges: at IRMAA Tier 1 ($109,001–$137,000 single-filer 2024 MAGI), the monthly premium rises to $284.10. At the highest tier ($500,000+ MAGI), the monthly premium is $689.90 ($8,278.80/year). Many PSHB plans offset this: APWU High Option and GEHA High Option each reimburse $1,200/person/year; NALC High Option reimburses $900/person/year.

What is the "double IRMAA" problem for higher-earning USPS retirees?

Under PSHB, Medicare Part D prescription drug coverage is delivered automatically through an Employer Group Waiver Plan (EGWP). IRMAA surcharges apply separately to both Part B and the Part D EGWP — so higher earners pay elevated premiums twice, per person. At IRMAA Tier 1, a retiree owes $284.10/month for Part B plus $14.50/month in Part D IRMAA — $298.60/month total per person, not counting the PSHB plan premium itself.

What happens if I do not enroll in Medicare Part B after retiring from USPS?

You are not immediately disenrolled. Under 5 CFR 890.1608(b), you receive one opportunity to remain enrolled in PSHB if you enroll in Medicare Part B during your next available enrollment period (usually the General Enrollment Period, January 1 – March 31). That cure window can only be used once. If you fail to enroll at that point, you will be disenrolled from PSHB permanently — and that disenrollment cannot be reversed.

Can I go back to FEHB if I lose PSHB coverage?

No. USPS employees and annuitants permanently lost FEHB eligibility on December 31, 2024. There is no return path. If you lose PSHB, your options are Medicare alone (if enrolled in Part A and B), an ACA Marketplace plan, or other coverage. This makes the Part B enrollment requirement far more consequential for postal retirees than for other federal employees.

Do my Medicare-eligible spouse or family members also have to enroll in Part B?

Yes. The requirement applies to each Medicare-eligible person on your PSHB enrollment. If your spouse is Medicare-eligible and covered under your PSHB enrollment, they must also enroll in Part B. The one-time cure window at 5 CFR 890.1608(b) applies to family members as well.

What is the Medicare Part B late enrollment penalty?

The late enrollment penalty is 10% of the standard premium for each full 12-month period you were eligible but not enrolled. It is permanent — you pay it for life. A two-year delay adds 20% to your Part B premium permanently. The PSHB mandate does not waive this penalty; the one-time cure window delays disenrollment but does not prevent the penalty from accruing.

I am still working at USPS and I just turned 65. Do I need to enroll in Part B now?

No. The Part B mandate under PSHB applies when you retire, not while you are actively employed. You may remain enrolled in PSHB without Part B while still working. When you retire, you will have a Special Enrollment Period (8 months from your retirement date or coverage end) to enroll in Part B without penalty, and the PSHB mandate requires you to enroll during that window.

What is the 2-year IRMAA lookback rule and how does it affect postal retirees?

CMS sets your Part B premium for a given year based on your MAGI from two years prior. Your 2026 premium is based on 2024 income. A postal employee who had a high-earning 2024 (overtime, terminal leave payout, lump-sum annual leave) may be pushed into an IRMAA tier for 2026 even though their retirement income is lower. If you had a qualifying life-changing event (retirement, reduced work hours, divorce, death of spouse), file SSA Form SSA-44 to request an income redetermination.

Calculator

PSHB Medicare Part B Net-Cost Calculator

Calculate your required 2026 Medicare Part B cost as a USPS retiree — IRMAA surcharges, the Part D double IRMAA, your plan's reimbursement offset, and your net annual out-of-pocket.

Reviewed by Jonathan D., 20-year federal employee · Formulas verified against OPM.gov · Updated June 2026

Check your exemption status

If any exemption applies, you are not required to enroll in Part B to keep PSHB coverage.

When did you retire (or when will you) from USPS?

Before January 1, 2025 - I am already a USPS annuitant (grandfathered)On or after January 1, 2025 - I retire (or retired) under the new rules

Your age on January 1, 2025

USPS employees who were age 64 or older on this date are exempt from the Part B mandate.

Additional exemptions - check all that apply

VA health care - eligible for VA health care under 38 U.S.C. subchapter II, chapter 17.Indian Health Service - eligible for IHS coverage as an American Indian or Alaska Native tribe member.Residing abroad - living outside the United States, where Medicare provides no coverage.

2026 Part B IRMAA reference table

2026 Part B premiums are based on your 2024 MAGI. Higher earners pay the standard premium plus an income-related surcharge (IRMAA) on both Part B and the Part D EGWP - the "double IRMAA."

2026 Medicare Part B IRMAA reference tiers
2024 MAGI (single filer)	Monthly Part B	Part D IRMAA / mo	Combined annual (per person)
Up to $109,000	$202.90	$0	$2,434.80
$109,001 – $137,000	$284.10	$14.50	$3,583.20
$137,001 – $171,000	$405.80	$37.50	$5,319.60
$171,001 – $205,000	$527.50	$60.40	$7,054.80
$205,001 – $499,999	$649.20	$83.30	$8,790
$500,000 or more	$689.90	$91	$9,370.80

Married-filing-jointly thresholds are double the single amounts. IRMAA is determined per person - both spouses on Medicare pay their own surcharge. Source: CMS 2026 Medicare Parts A & B Premiums fact sheet. ~ denotes an approximate Part D IRMAA surcharge; verify against the CMS 2026 Part D IRMAA table.

2026 PSHB plan Part B reimbursements

Most PSHB plans offset the mandatory Part B premium with a direct reimbursement per Medicare-eligible person enrolled. A couple where both spouses are enrolled receives double the reimbursement.

2026 PSHB plan Part B reimbursements
Plan	Reimbursement / person / year	Net Part B (standard tier)
APWU High Option	$1,200/yr	$1,234.80
GEHA High Option (PSHB)	$1,200/yr	$1,234.80
NALC High Option	$900/yr	$1,534.80
GEHA Standard (PSHB)	$900/yr	$1,534.80
MHBP Standard	$900/yr	$1,534.80
BCBS FEP Basic *	$800/yr	$1,634.80

Reimbursement amounts vary by plan and are set annually. Net Part B assumes the standard premium tier (no IRMAA); add your IRMAA surcharge if you are a higher earner. Sources: OPM PSHB Medicare Cost Savings page; Federal News Network October 2025. * BCBS Basic amount based on publicly reported figures - verify the 2026 brochure.

Key facts for USPS retirees

Coverage, not a fee

Skipping Part B is not a surcharge — it ends your PSHB coverage permanently, and there is no re-enrollment if eligibility lapses past Dec 31, 2026.

One-time cure window

Miss the enrollment period and you get one chance to fix it via the Medicare General Enrollment period — but only once.

IRMAA looks back 2 years

Your 2026 Part B premium and any IRMAA surcharge are based on your 2024 MAGI.

Plans reimburse Part B

Most PSHB plans offset the premium with $800–$1,200 per Medicare-eligible person per year — often covering the bulk of the standard premium.

The double IRMAA

Higher earners pay an IRMAA surcharge twice — on Part B and on the Part D EGWP — and both apply per enrolled person.

Couples pay per person

IRMAA and the reimbursement both apply per enrolled spouse — a two-Medicare household roughly doubles the figures. Appeal a life-changing income event to SSA with Form SSA-44.

The PSHB Medicare Part B mandate — what USPS retirees must know

The Postal Service Reform Act of 2022 (Pub. L. 117-108) created the Postal Service Health Benefits (PSHB) Program, which launched January 1, 2025. A central feature: PSHB makes Medicare Part B enrollment mandatory for most post-2024 retirees. Unlike other federal employees, USPS retirees who retire on or after January 1, 2025 must actively enroll in — and keep — Part B to keep PSHB coverage.

The word "mandatory" understates the consequence. This is not a financial penalty for skipping Part B; it is a condition of enrollment. A USPS retiree who becomes eligible for Part B and fails to enroll is not charged a higher premium for PSHB — their PSHB coverage is terminated.

Complete exemption list — 6 categories

These are the only exemptions from the Part B requirement (5 CFR 890.1605). No other reason qualifies. If you do not fall into one of these categories and retire after January 1, 2025, Part B enrollment is required to keep PSHB.

PSHB Medicare Part B enrollment exemption categories
Category	Who is exempt
Pre-2025 retiree	Retired (annuitant) on or before January 1, 2025 — grandfathered, not required to enroll in Part B.
Age-64 transition	Active USPS employee who was age 64 or older on January 1, 2025 (born on or before Jan 1, 1961).
VA health care	Eligible for VA health care under 38 U.S.C. subchapter II, chapter 17 (5 CFR 890.1604).
Indian Health Service	Eligible for IHS coverage as an American Indian or Alaska Native.
Residing abroad	Living outside the U.S. or its territories, where Medicare provides no coverage (documentation required).
Active employee	Still an actively-working postal employee — no Part B requirement until you retire.

Sources: 5 CFR 890.1605; OPM PSHB Annuitant page; NARFE PSHB FAQ. FedTools 2026 original organizing table — no competitor has published all six categories in a single reference.

The one-time cure window (underreported)

The most underreported fact: a USPS retiree who misses the Part B enrollment period does not immediately end PSHB coverage. Under 5 CFR 890.1608(b), an individual who is required to enroll in Part B but has not yet enrolled has one opportunity to remain in PSHB — by enrolling in Part B during their next available enrollment period, typically the Medicare General Enrollment period, January 1 – March 31, with coverage effective July 1.

Critical limitations of the cure window

One time only: the cure window can only be used once per individual. There is no second chance.

The penalty still applies: the one-time cure does not waive the Medicare Part B late-enrollment penalty, which adds 10% per full 12-month period eligible-but-not-enrolled — for life.

No PSHB fallback: USPS annuitants cannot re-enroll in PSHB if eligibility lapses beyond December 31, 2026, and FEHB eligibility ended December 31, 2024.

FedTools 2026 analysis: net annual Medicare cost by plan

Each PSHB plan's net annual Part B cost at the standard IRMAA tier, after the plan's per-person reimbursement. Higher earners should use the calculator above to compute their IRMAA-adjusted cost.

PSHB Part B reimbursement cost comparison
Plan	2026 Part B annual	Plan reimbursement	Net annual cost	Net 15-year cost
APWU High Option	$2,434.80	-$1,200	$1,234.80	$18,522
GEHA High Option (PSHB)	$2,434.80	-$1,200	$1,234.80	$18,522
NALC High Option	$2,434.80	-$900	$1,534.80	$23,022
GEHA Standard (PSHB)	$2,434.80	-$900	$1,534.80	$23,022
MHBP Standard	$2,434.80	-$900	$1,534.80	$23,022
BCBS FEP Basic *	$2,434.80	-$800	$1,634.80	$24,522

Net figures assume the standard Part B premium ($202.90/mo, $2,434.80/yr) at the lowest IRMAA tier; the 15-year figure assumes a flat premium for illustration and does not account for annual increases. Reimbursements double for couples where both spouses enroll. * BCBS Basic amount based on publicly reported figures — verify the 2026 brochure.

Related tools & guides

FEHB / PSHB Premium Calculator

Compare PSHB plan premiums by coverage tier before you add Part B.

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VERA Eligibility Checker

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The PSHB Medicare Part B Trap

The full explainer: exemptions, the cure window, and the common misconceptions.