The standard Medicare Part B premium rose to $185.00 per month in 2025, up about $10.30 from $174.70 in 2024.
That's a roughly 6% increase, and it hits every enrollee's Social Security check before they ever see the money.
Part B covers doctor visits, outpatient care, preventive services, and durable medical equipment.
Unlike Part A, which most people get free after paying Medicare taxes for at least 10 years, Part B always carries a premium.
And that premium is deducted straight from your monthly Social Security benefit if you're already collecting.
For someone on a fixed income of, say, $1,800 a month, that $185 is more than 10% of their check gone before groceries, rent, or prescriptions.
Add a Medicare Advantage or Medigap plan on top, and many seniors are looking at $300 to $400 in total monthly health costs.
Here's the part that surprises people: the $185 figure only applies to single filers earning $106,000 or less (or $212,000 for couples filing jointly).
Earn more, and you pay an income-related monthly adjustment amount, or IRMAA.
The top tier in 2025 is $628.90 per month for Part B alone.
IRMAA is based on your tax return from two years ago — so your 2025 premium is tied to your 2023 income.
That lag trips up retirees who sold a house, took a big withdrawal, or had a one-time bonus.
If your income dropped since then, you can file Form SSA-44 and request a reduction, but you have to ask.
There's a silver lining on the deductible side.
The 2025 Part B deductible is $257, up $17 from 2024.
Once you hit it, you typically pay 20% of covered services with no annual cap — which is exactly why most enrollees pair Part B with supplemental coverage.
If you're still working and covered by an employer plan, you may be able to delay Part B without penalty, but the rules depend on employer size.
Miss your enrollment window and you could face a permanent late-enrollment penalty of 10% for every 12 months you waited.
A few money-saving moves worth knowing: compare Medigap plans during open enrollment, check whether you qualify for a Medicare Savings Program (which can cover Part B premiums for low-income enrollees), and review your Part D drug plan every year since formularies shift.
Also, if you're newly eligible, sign up during your seven-month initial enrollment window to avoid penalties.
The bigger picture is that Part B premiums have more than doubled over the past 15 years, and they tend to rise faster than the annual Social Security cost-of-living adjustment.
In some years, the COLA barely covers the premium hike, leaving recipients with a nearly flat check. **Our take:** The Part B premium is one of those costs that quietly erodes retirement budgets, and most people don't shop around because it feels automatic.
If your income changed, appeal the IRMAA.
If you're healthy and disciplined, run the math on Medicare Advantage versus original Medicare plus Medigap.
Final Thoughts
A few hours of comparison can save real money every single month.