The Medicare Part B Premium Puzzle: Why You Pay What You Pay

You've probably heard a neighbor mention their Medicare Part B premium and wondered why their number sounds different from yours. It's not a mistake—Medicare Part B premiums aren't one-size-fits-all. While everyone receives the same coverage, what you pay depends on factors that might surprise you. Let's unravel this puzzle so you know exactly what you're paying for and why.

What Medicare Part B Actually Covers

Medicare Part B is your outpatient medical insurance, and it covers far more than most people realize. This includes doctor visits, preventive care like annual wellness exams and screenings, outpatient surgery, lab tests, X-rays, mental health services, and durable medical equipment such as wheelchairs and walkers.

Part B also covers many preventive services at no cost to you when provided by participating providers—including cardiovascular screenings, diabetes screenings, and various cancer screenings. Ambulance services, physical therapy, occupational therapy, and even some home health services fall under Part B coverage. For New Jersey residents managing chronic conditions, this coverage becomes invaluable for maintaining quality of life without repeated hospital stays.

One critical coverage area: Part B pays for medically necessary supplies and services both in medical facilities and, when appropriate, in your home. This is particularly important for seniors aging in place who need ongoing care but don't require hospitalization.

The Base Premium: Your Starting Point

Every year, Medicare announces a standard Part B premium that serves as the baseline. This amount is deducted from your Social Security check if you're receiving benefits, or you'll receive a bill if you're not yet collecting Social Security.

Most beneficiaries pay this standard premium amount. It covers approximately 25% of Part B costs, with Medicare's trust fund covering the remaining 75%. The premium typically increases annually to reflect rising healthcare costs, though the increase is often modest.

New Jersey residents should note that this premium is federal, not state-based, so you'll pay the same standard premium as beneficiaries in other states. However, what you ultimately pay might differ based on your income—which brings us to the adjustment that catches many people off guard.

IRMAA: The Income-Related Monthly Adjustment Amount

Here's where premiums get personal: if your modified adjusted gross income (MAGI) exceeds certain thresholds, you'll pay an Income-Related Monthly Adjustment Amount, or IRMAA, on top of the standard premium.

Social Security determines your IRMAA based on tax returns from two years prior. So your 2026 premium reflects your 2024 income. This delay trips up many retirees who had a one-time income spike—perhaps from selling a home, taking a large IRA distribution, or converting retirement accounts.

The IRMAA thresholds create tiers, with premiums increasing at each income level. Higher-income beneficiaries can pay significantly more than the standard premium. For married couples filing jointly, the income thresholds differ from those filing individually, so your filing status matters considerably.

If you've experienced a life-changing event—marriage, divorce, death of a spouse, work stoppage, or loss of income-producing property—you can appeal your IRMAA determination using Form SSA-44. Many New Jersey residents don't realize they have this recourse and pay higher premiums unnecessarily.

Understanding Your Part B Statement and Planning Ahead

Your Medicare Summary Notice shows what Part B covered and what you owe. Review these statements carefully, as billing errors do occur. You'll also receive annual notices about your premium amounts, typically arriving in late fall for the following year.

For planning purposes, remember that Part B includes an annual deductible before coverage begins, and most services require you to pay 20% coinsurance after the deductible is met. This is why many New Jersey residents pair Part B with either a Medigap policy or a Medicare Advantage plan—to help manage these out-of-pocket costs.

Get Personalized Guidance for Your Situation

Medicare Part B premiums and coverage can feel complicated, especially when IRMAA enters the picture. Your specific situation—income level, health needs, and retirement plans—all influence what you'll pay and how to optimize your coverage.

The licensed advisors at New Jersey Medicare Advisory help residents throughout the state understand their Part B costs and explore coverage options that make sense for their circumstances. Whether you're approaching Medicare eligibility or dealing with a premium surprise, we're here to help. Call us at 856-221-7051 for a no-cost consultation tailored to your needs.