Medicare's annual open enrollment window just closed, and many retirees are opening their first 2026 Social Security statements to a rude surprise: a bigger chunk of their monthly check is vanishing before it ever hits the bank.
The standard Part B premium for 2026 rose to $202.90 per month, up from $185.00 in 2025—a roughly 9.7% increase that amounts to about $215 more per year for the average enrollee.
For couples both on Medicare, that's closer to $430 in additional annual costs, before a single doctor visit or prescription is factored in.
The math gets worse when you stack it against the Social Security cost-of-living adjustment.
The 2026 COLA came in at 2.8%, which means for many retirees, the premium hike eats up a significant slice of their raise.
Someone receiving $1,900 a month in benefits sees about $53 more from the COLA, but pays $17.90 more just for Part B—before Medicare Part D premiums, Medicare Advantage changes, or supplemental plan increases.
The income-related monthly adjustment amount, or IRMAA, kicks in once modified adjusted gross income tops $106,000 for individuals or $212,000 for couples filing jointly.
Those brackets mean some retirees are paying north of $600 a month for Part B alone.
And because IRMAA is based on tax returns from two years prior, a one-time Roth conversion, home sale, or big capital gain can trigger a surcharge that lingers for a full year.
Here's the part that catches people off guard: if you're collecting Social Security, you don't get a bill for Part B.
The premium is automatically deducted from your monthly payment, so the increase shows up as a smaller deposit rather than a separate charge.
Retirees who haven't started Social Security yet get a quarterly bill instead, and missing it can mean losing coverage.
There are a few legitimate ways to push back.
If your income dropped because of a qualifying life-changing event—retirement, divorce, death of a spouse, or loss of a pension—you can file Form SSA-44 to request a reduction in your IRMAA.
The Social Security Administration reviews these case by case, and the documentation requirements are strict.
It's also worth checking whether a Medicare Advantage plan or a different Medigap policy makes more sense for your situation.
Advantage plans often bundle Part D and sometimes offer extra benefits like dental or vision, but they come with network restrictions and prior authorization requirements that can trip people up.
Medigap, by contrast, tends to cost more monthly but leaves fewer surprises at the doctor's office.
One more thing to watch: the Part B deductible for 2026 is $283, up $26 from last year.
That's the amount you pay out of pocket before Medicare starts covering its share of most outpatient services.
If you're still working and covered by an employer plan, you may be able to delay Part B enrollment without penalty—but the rules are specific, and getting them wrong can mean paying a permanent late-enrollment surcharge of 10% for every 12 months you should have been enrolled.
The takeaway here is simple: don't assume the deduction on your check is correct, and don't assume you can't do anything about it.
Review your notice each fall, check whether your income qualifies you for an IRMAA reduction, and compare your plan options before auto-renewing.
Final Thoughts
A few phone calls and one form can be worth hundreds of dollars a year—money that matters more than ever for retirees on fixed incomes.