how-to
Why Medicare Premiums Change Every Year
Table of Contents
- Why Medicare Premiums Change Every Year
- Medicare Part B Standard Premiums and Deductibles
- How Income Affects Medicare Costs Through IRMAA
- Medicare Part D Premiums and Prescription Drug Costs
- Medicare Advantage Premium Changes Year to Year
- Understanding Your Medicare Annual Notice of Change
- How to Appeal Medicare IRMAA Decisions
- What to Do When Your Premium Increases
- Step 1: Compare this year's notice to last year's
- Step 2: Separate the Medicare premium from the Social Security withholding
- Step 3: Verify the IRMAA calculation against the correct tax year
- Step 4: Check whether the change is plan-specific
- Step 5: Decide whether to switch, appeal, or accept
- Step 6: Get help if the cause is still unclear
- Frequently Asked Questions
Last Updated: October 20, 2026
Why Medicare Premiums Change Every Year
Your Medicare premium changes every year, most commonly due to an annual adjustment by the Centers for Medicare & Medicaid Services (CMS), but income changes, plan switches, and coverage updates also affect what you pay.
Understanding why your costs shift helps you plan better and catch errors on your Medicare notices.
Medicare adjusts premiums, deductibles, and out-of-pocket limits every year. Your personal situation matters too: a bump in retirement income, a plan switch, or a change in prescription drugs can all trigger a higher bill.
Medicare Part B Standard Premiums and Deductibles
Medicare Part B covers doctor visits and outpatient services. The standard premium increases most years, and the amount depends on your income level.
For 2026, CMS sets the standard Part B premium each fall, and it applies to most beneficiaries. If you have higher income, you pay a surcharge on top called the Income-Related Monthly Adjustment Amount, or IRMAA (2026 Medicare Parts A & B Premiums and Deductibles).
The Part B deductible also changes annually. You must meet it before Medicare pays its share of doctor and outpatient bills; after that, you typically pay 20% coinsurance for most services.
Your Part B premium is withheld from your Social Security check each month, separate from any IRMAA surcharge you might owe.
How Income Affects Medicare Costs Through IRMAA
If your income is above a certain threshold, Medicare charges you more through the Income-Related Monthly Adjustment Amount. It applies to Part B premiums, Part D premiums, and Medicare Advantage plans. IRMAA brackets change every year, with thresholds and surcharge amounts updated annually by CMS. Higher income means a higher surcharge, which can double or triple your standard premium.
Understanding the Two-Year Income Lookback
Medicare uses a two-year lookback to calculate IRMAA, so your 2026 Medicare premiums are based on your 2024 income tax return.
To challenge an IRMAA calculation, file an appeal with Social Security, showing proof of the income change and why your current income is lower. Social Security reviews it and may adjust your premiums for the rest of the year.
Medicare Part D Premiums and Prescription Drug Costs
Part D covers prescription drugs. Your Part D premium depends on your plan and income level.
Each year, insurers submit new premiums to CMS. Some plans go up, some go down, drug costs change, and so do the drugs each plan covers.
If your plan's premium jumps too high, you can switch during the Annual Enrollment Period, which runs from October 15 to December 7 each year, and pick a plan that fits your budget.
Part D also has an annual deductible that can change year to year.
Medicare Advantage Premium Changes Year to Year
Medicare Advantage (Part C) plans are offered by private insurers and bundle Parts A, B, and D into one plan.
Many Medicare Advantage plans have zero premium, but some charge a monthly premium on top of Part B.
Coverage also shifts: copayments and coinsurance can increase, and your network and formulary may change.
That's why it's critical to review your Medicare Advantage plan each year during Annual Enrollment.
Income-related surcharges apply to Medicare Advantage premiums too.
Understanding Your Medicare Annual Notice of Change
Read it carefully: a drug you take may no longer be covered, your doctor may have left the network, or your out-of-pocket costs may jump.
If you don't like the changes, the Annual Enrollment Period runs October 15 to December 7, letting you switch to a different Medicare Advantage plan or add or drop Part D coverage.
Keep your notice for reference if you have questions later or need to appeal a coverage decision.
How to Appeal Medicare IRMAA Decisions
If you believe your IRMAA surcharge is wrong, you can ask Social Security to reconsider it. Often called an IRMAA appeal, the formal mechanism is a request for a new initial determination based on more recent income, and Social Security, not Medicare, handles it.
When you can request a reconsideration
You generally cannot appeal simply because you dislike the surcharge. You need a qualifying life-changing event that reduced your income, plus evidence that your current income is lower than the income Medicare used. Social Security recognizes specific events, including:
- Retirement or reduced work hours
- Loss of a spouse
- Marriage
If your income dropped for a reason not on this list, ask Social Security about other options.
What evidence to gather
Prepare a complete packet before you file to reduce back-and-forth and speed the decision:
- Form SSA-44, the Medicare Income-Related Monthly Adjustment Amount Life-Changing Event form Social Security uses to request a new determination.
- Proof of the life-changing event, retirement letter, death certificate, divorce decree, or similar documentation.
- Estimated current-year income, pay stubs, a signed statement of expected income, or a current tax return if filed.
Keep copies of everything you send. Social Security does not always return originals.
Timing and what happens while you wait
File as soon as the event occurs and you have the evidence, you do not have to wait for the next Annual Enrollment Period. If approved, Social Security recalculates your IRMAA; the new amount generally takes effect the month after the decision, and overpaid surcharges are typically refunded. While the request is pending, you still owe the original surcharge; continue paying it to avoid a gap in coverage or a billing problem.
If the request is denied
If Social Security denies the request, you have appeal rights. The denial notice will explain the next level of review and the deadline, typically 60 days from the date of the notice. You can request a reconsideration, and if needed, a hearing before an administrative law judge.
The key is to match the evidence to the event and to the income figure Social Security is using.
What to Do When Your Premium Increases
When you see a higher premium, don't panic. The fastest way to resolve it is to figure out which charge actually changed before you call anyone. Use this diagnostic checklist to isolate the cause.
Step 1: Compare this year's notice to last year's
Pull out your Annual Notice of Change (ANOC) and Medicare Summary Notice, and place them side by side with last year's versions. Look for three separate lines:
- Part B standard premium, the base amount set by CMS each fall.
- Part B IRMAA surcharge, an income-related add-on, if any.
- Part D or Medicare Advantage premium, the amount charged by your specific plan.
If only the Part B standard premium moved, the cause is the annual federal rate update. If the IRMAA line appeared or grew, the cause is income. If the plan premium line changed, the cause is plan-specific.
Step 2: Separate the Medicare premium from the Social Security withholding
A smaller Social Security check does not always mean your Medicare premium went up. Two other things can shrink your net benefit:
- The hold-harmless provision. If you are enrolled in both Medicare Part B and Social Security and your Part B premium would otherwise consume most of your COLA, the hold-harmless rule can limit how much your Part B premium rises so your net Social Security benefit does not decrease. This protection generally does not apply to people who pay IRMAA or who are new to Medicare.
- Changes in federal tax withholding or other deductions. A change in your voluntary withholding election can reduce your check without any Medicare change at all.
Compare the gross benefit, the Part B deduction, the IRMAA line (if itemized), and any tax withholding line. If the gross benefit and Part B deduction are unchanged but your check is smaller, the cause is likely withholding.
Step 3: Verify the IRMAA calculation against the correct tax year
If an IRMAA surcharge appeared, confirm which tax year Social Security used. Medicare generally uses a two-year lookback, so a 2026 surcharge is normally based on your 2024 return. Check the income figure on your notice against the adjusted gross income plus tax-exempt interest on that return. If it matches, the surcharge is likely correct and the remedy is a reconsideration based on a life-changing event.
Step 4: Check whether the change is plan-specific
If your Part B line is stable but your total premium rose, the change is probably in your Part D or Medicare Advantage plan. Common causes include:
- A new formulary that moved one of your drugs to a higher tier.
- A premium increase filed by the insurer for the new plan year.
- A network change that affects which providers are in-network.
Your ANOC should list these changes. If it does not, call the plan directly and ask for the specific line item that changed.
Step 5: Decide whether to switch, appeal, or accept
Once you know the cause, the remedy follows:
- Federal rate update only: No action needed beyond budgeting. You can still compare plans during the Annual Enrollment Period (October 15 to December 7) to see whether a different plan lowers your total cost.
- Plan-specific increase: Compare plans during Annual Enrollment. A plan that fit last year may no longer be the lowest-cost option.
- IRMAA surcharge based on older income: File a reconsideration with Social Security if a qualifying life-changing event applies.
Step 6: Get help if the cause is still unclear
If you have compared notices, separated the withholding lines, and checked the tax year and still cannot identify the cause, ask for help. A licensed Medicare agent or your State Health Insurance Assistance Program (SHIP) can review your notices. Bring your ANOC, Medicare Summary Notice, Social Security benefit statement, and the tax return Medicare used, with those four documents, most increases can be traced in a single conversation.
A premium increase is frustrating, but it is almost always traceable. Identifying which part changed, and why, tells you whether to switch plans, appeal an IRMAA decision, or adjust your budget.
Frequently Asked Questions
Do Medicare premiums change each year?
Yes. Medicare premiums typically change annually due to federal rate adjustments, changes in your income, and modifications to plan benefits. Part B premiums and deductibles adjust each January based on cost-of-living factors. If your income has increased, you may also face higher premiums through IRMAA surcharges. Even if your circumstances haven't changed, your plan's premium may increase if you're enrolled in Medicare Advantage or Part D coverage.
Can my income affect my Medicare premiums?
Yes. If your modified adjusted gross income (MAGI) exceeds certain thresholds, you pay higher premiums through an Income-Related Monthly Adjustment Amount (IRMAA). Medicare uses your tax return from two years prior to calculate this surcharge. For example, 2026 IRMAA is based on your 2024 income. If you experience a qualifying life event such as retirement, job loss, or divorce that reduces your income, you can request an IRMAA appeal to potentially lower your surcharges.
What is the Medicare annual notice of change, and why should I review it?
Your Medicare annual notice of change is a document sent by your plan each fall that outlines premium increases, deductible changes, and coverage modifications for the upcoming year. Reviewing it helps you understand exactly why your costs are rising and whether your current plan still meets your needs. If your plan's changes don't work for you, this notice signals the start of the Annual Enrollment Period when you can switch to a different Medicare Advantage or Part D plan.
How can I appeal an IRMAA decision if I believe it's incorrect?
You can appeal an IRMAA surcharge by filing a reconsideration request with Social Security. You have 60 days from the date on your notice to appeal. If your income has dropped due to a qualifying event (retirement, job loss, death of spouse), submit documentation such as your recent tax return or a letter from your employer. Social Security will review your case and may reduce or eliminate your IRMAA surcharge if your current income is lower than the amount used to calculate it.
