Do Medicare Premiums Increase

Yes — Medicare Premiums Increase, and the Mechanism Is More Complex Than Most Retirees Realize

Medicare premiums increase virtually every year — Part B premiums have risen in the vast majority of years since the program’s inception, and the combination of baseline premium increases and income-based surcharges can produce a retirement healthcare cost that grows significantly faster than general inflation for many beneficiaries. For the majority of Medicare enrollees who pay only the standard premium, the annual increase is a predictable and manageable cost of retirement planning. For the roughly 8 percent of Medicare enrollees who pay income-related premium surcharges — the Income-Related Monthly Adjustment Amount, universally referred to as IRMAA — the premium trajectory is significantly more complex and can produce abrupt cost increases when income crosses specific thresholds without warning. Understanding both the baseline premium increase mechanism and the IRMAA surcharge structure is essential for any retirement income plan that accounts for healthcare costs accurately — and most do not. At Diversified Insurance Brokers, Jason Stolz, CLTC, CRPC, DIA, CAA and Medicare specialist Tonia Pettitt, CMIP©, work with clients to project Medicare premium costs across the full retirement horizon, incorporate IRMAA thresholds into retirement income planning, and identify the income management strategies that can reduce or eliminate IRMAA surcharges that would otherwise add thousands of dollars annually to Medicare costs.

Why Medicare Part B Premiums Increase Each Year

Medicare Part B premiums are adjusted annually by the Centers for Medicare and Medicaid Services, which publishes updated premium amounts each November for the following calendar year. The statutory formula for Part B premium determination is designed to cover a defined percentage of the program’s projected per-capita expenditures — as healthcare costs, utilization rates, and drug costs increase, the premium that covers the required percentage of those expenditures increases proportionally. The primary drivers CMS cites for Part B premium increases year over year are projected price changes for covered services and assumed utilization increases consistent with historical trends — meaning the premium incorporates not just what healthcare costs today but what CMS projects it will cost during the upcoming coverage year. Part B drug costs — specifically drugs administered in clinical settings such as cancer infusions and biologics — are a particularly significant and volatile component because their pricing can produce large year-over-year swings in the projected cost base that feeds the premium calculation. One specific statutory protection limits how much Part B premiums can increase for existing enrollees who receive Social Security: the hold-harmless provision prevents Part B premium increases from reducing a Social Security beneficiary’s net monthly check, meaning that if the Social Security cost-of-living adjustment is insufficient to cover the full premium increase, the increase for that enrollee is limited to the dollar amount of their COLA. How Medicare works across its four parts — A, B, C, and D — establishes the premium and cost-sharing structure that the annual increase dynamic affects differently for each part. Enrolling in Medicare at 65 and the premium obligations that begin with enrollment is the practical starting point for understanding what Medicare costs in retirement — projecting how those costs will grow over a retirement that may span 25 or 30 years is a planning exercise that dramatically affects how much retirement income needs to be reserved for healthcare.

IRMAA — The Income-Based Medicare Surcharge That Surprises Most Retirees

The Income-Related Monthly Adjustment Amount is the most consequential and most commonly misunderstood dimension of Medicare premium increases for retirement planners. IRMAA is a surcharge added to the standard Part B and Part D premiums for Medicare beneficiaries whose modified adjusted gross income exceeds defined thresholds — and it operates as a cliff surcharge rather than a graduated phaseout, meaning that crossing a threshold by a single dollar triggers the full surcharge for the entire tier. IRMAA thresholds are set annually by CMS and adjust for inflation — current thresholds and surcharge amounts are always confirmed at medicare.gov, as they update each year. These thresholds are based on the beneficiary’s income from two years prior — the IRMAA determination in any given coverage year uses the tax return filed two years earlier, because it is the most recent complete tax year available to the Social Security Administration when IRMAA determinations are made each fall. What IRMAA is and how it is calculated is the technical foundation for any Medicare premium planning strategy — because the two-year lookback creates a specific planning window during which income management decisions made today affect Medicare premium costs two years in the future.

The Cliff Effect — How One Dollar Over a Threshold Changes Annual Medicare Costs

The cliff structure of IRMAA surcharges creates planning stakes that are unusually high relative to the dollar amounts involved. A single dollar of additional modified adjusted gross income that crosses an IRMAA bracket boundary triggers a full tier increase in both Part B and Part D premiums that can exceed $1,000 per year for an individual beneficiary — and for a married couple where both spouses are enrolled in Medicare, the same dollar of excess income can increase combined annual premium costs by more than $2,000. This cliff dynamic makes the IRMAA threshold itself a more consequential planning variable than the marginal income tax rate for many retirees — the effective marginal cost of the dollar that crosses an IRMAA threshold includes not just the income tax owed on that dollar but the full annual premium increase that dollar triggers. IRMAA planning strategies specifically address how to manage modified adjusted gross income below threshold boundaries — through Roth conversion planning, retirement account withdrawal sequencing, capital gain realization timing, charitable giving structures, and income deferral approaches — to prevent the cliff effect from producing avoidable premium surcharges. How modified adjusted gross income affects both Social Security taxation and Medicare costs simultaneously is the integration point where Social Security income planning and Medicare premium management become a single coordinated optimization problem rather than two separate planning exercises. The MAGI definition for IRMAA purposes includes a specific add-back that frequently surprises retirees: tax-exempt interest from municipal bonds is added back to adjusted gross income when calculating MAGI for IRMAA purposes. A retiree who holds significant municipal bond investments may find that their MAGI for IRMAA is substantially higher than their taxable income — and their Medicare premium significantly higher than the standard rate — despite having structured income to minimize taxable income specifically to avoid the surcharge.

IRMAA thresholds and surcharge amounts update annually each November. Confirm current-year figures at medicare.gov before any planning decision.

The table illustrates the tier structure of IRMAA surcharges — each bracket producing a distinct premium level that applies to all beneficiaries within that income range regardless of where in the range their income falls. Crossing from one tier to the next by a single dollar of MAGI triggers the full premium difference between tiers. The full MAGI calculation for Medicare purposes — including the municipal bond interest add-back — is the technical foundation for understanding why IRMAA affects some retirees who had not expected to pay surcharges based on taxable income alone. Since 2007, approximately 8 percent of Medicare Part B beneficiaries have paid income-related adjustment amounts — a share that grows as the retired population’s investment income and retirement account distributions push more beneficiaries above the standard threshold each year.

Medicare Part A, Part C, and Part D Premium Trends

Part A — the hospital insurance component of Medicare — is premium-free for beneficiaries who have accumulated at least 40 quarters of Medicare-covered employment, which includes the vast majority of retirees. Beneficiaries with 30 to 39 quarters pay a reduced monthly premium, and those with fewer than 30 quarters pay the full premium, which CMS adjusts upward most years consistent with the same cost drivers that affect Part B. Part A cost-sharing — deductibles and daily coinsurance amounts for extended inpatient hospital stays — also increases annually. Medicare Advantage plans have their own premium structures set by the private insurance companies that administer them, and these premiums vary significantly by plan, geography, and the specific benefits included. Some Medicare Advantage plans offer zero-dollar premiums — while the Part B premium is still owed separately — while others charge additional monthly amounts that change at each plan’s annual renewal. Beneficiaries must review their plan’s Annual Notice of Change each fall to understand what premium and cost-sharing changes are taking effect for the following year. The best-rated Medicare Advantage companies are identified through a combination of plan star ratings, premium levels, network coverage, and benefit structure — and annual plan comparison at open enrollment is the mechanism through which beneficiaries can manage Medicare Advantage premium costs by switching to more competitive plans. Part D prescription drug coverage premiums are set by the private plan and vary by the specific plan elected — these premiums also increase annually and are subject to the same IRMAA surcharge tiers as Part B for higher-income beneficiaries. Finding the best Medicare rates across all plan types requires annual comparison shopping because the premium landscape changes each year. An independent Medicare broker who represents multiple carriers can compare the full plan landscape rather than recommending only a single carrier’s offerings. Hospital indemnity insurance for Medicare Advantage members addresses the cost-sharing gap that Medicare Advantage plans create through deductibles and coinsurance for hospital stays — a supplemental coverage layer that manages out-of-pocket cost risk within a Medicare Advantage structure.

Medicare Supplement Premium Increases — Medigap and the Long-Term Cost Picture

Medicare Supplement plans — widely called Medigap plans — charge their own premiums in addition to the Part B premium, covering most or all of the cost-sharing gaps that Original Medicare leaves for the beneficiary: Part A and Part B deductibles, coinsurance, and in some cases excess charges. Medigap premiums increase over time through two distinct mechanisms. The first is general rate increases reflecting higher healthcare costs, insurer claims experience, and the premium adjustment practices of the specific carrier. The second — and more significant for long-term cost management — is age-rating, where premiums increase as the beneficiary ages under attained-age-rated policies, which comprise the majority of Medigap plans sold. Under attained-age rating, the Medigap premium paid at 65 is the lowest that beneficiary will ever pay on that plan — premiums increase annually as the beneficiary ages, producing a cost trajectory that rises persistently throughout retirement. The best Medicare supplement plans for seniors are evaluated not just on current premium but on the carrier’s historical rate increase patterns, the plan’s coverage comprehensiveness, and the geographic stability of the carrier’s pricing — because a Medigap plan with the lowest initial premium but a history of aggressive rate increases may cost significantly more over a 20-year retirement than a competitor with a slightly higher initial premium and more modest annual adjustments. The total lifetime cost of Medicare coverage — including the base Part B premium, Medigap premium, Part D premium, and any IRMAA surcharges — is a meaningful financial projection that comprehensive retirement income planning should incorporate and that most retirement planning exercises underestimate by projecting only current-year costs rather than modeling the full trajectory of increasing premiums across the retirement horizon. The Medicare calculator available through Diversified Insurance Brokers provides a starting point for projecting Medicare coverage costs based on current plan options.

Integrating Medicare Premium Increases Into Retirement Income Planning

The retirement income plan that accurately accounts for Medicare premium increases is fundamentally different from one that projects a static healthcare cost — the difference compounds significantly over a 20 to 30-year retirement. A beneficiary who projects current Medicare costs forward without growth assumptions may find that their retirement income plan, which appeared adequate at 65, creates increasing pressure on discretionary spending as Medicare premiums consume a growing share of fixed income sources over time. Part B premiums have historically increased at an average rate that exceeds general consumer price inflation over most multi-decade periods, making a healthcare cost inflation assumption meaningfully higher than general inflation appropriate for long-term retirement modeling. The integration challenge is that Medicare premium increases interact with virtually every other retirement income planning decision in ways that require coordinated analysis rather than isolated healthcare cost projection.

Social Security, IRMAA, and the Unified MAGI Problem

Social Security claiming age affects the MAGI calculation through the timing and amount of Social Security income entering the tax return; retirement account withdrawal sequencing determines what income appears in the lookback years that determine IRMAA; Roth conversion strategies conducted in lower-income years can reduce future MAGI below IRMAA thresholds in exchange for paying taxes now at lower rates; and annuity income structures affect MAGI depending on the type of annuity and the tax treatment of its distributions. Strategies to reduce the tax burden on Social Security income overlap directly with IRMAA management — because the combined income that determines the taxable percentage of Social Security is the same MAGI measure that determines IRMAA tier placement, making Social Security tax minimization and IRMAA avoidance the same planning problem approached from different angles. Whether Social Security is taxable and at what income level is the first question in this integrated analysis — with up to 85 percent of Social Security benefits subject to federal income tax for beneficiaries above the combined income thresholds, the interaction between Social Security income, other retirement income, and MAGI creates a compounding tax and premium management challenge. Strategies to minimize Social Security taxes — including timing of retirement account withdrawals, use of Roth accounts, and charitable giving through qualified charitable distributions — are also the strategies that most directly affect MAGI and therefore IRMAA tier placement, making them core tools in the integrated planning framework. When to start taking Social Security benefits is a Medicare premium planning decision as much as a longevity planning decision — because the year Social Security begins is the year it enters MAGI, and the claiming age that maximizes lifetime Social Security income may or may not minimize lifetime IRMAA surcharges, requiring both optimization problems to be solved together. Maximizing Social Security benefits through optimal claiming strategy while simultaneously managing MAGI below IRMAA thresholds is the integrated challenge that frequently requires coordinating multiple income sources in ways that single-variable optimization cannot produce.

Annuity Income Structures and Their MAGI Impact

How Social Security and annuities work together in a retirement income plan is directly relevant to IRMAA — because the annuity’s income tax treatment affects MAGI, and choosing between qualified and non-qualified annuity income, between systematic withdrawals and annuitization, and between different income activation timelines produces different MAGI levels in the lookback windows that determine IRMAA. Non-qualified long-term care annuities serve a dual planning purpose in the Medicare context: the tax treatment of non-qualified annuity income — taxing only the gain above cost basis rather than the full distribution — may produce lower MAGI than qualified account withdrawals of the same gross dollar amount, making non-qualified annuity income structurally more favorable for IRMAA management in some planning scenarios. Annuities with long-term care benefits address the coverage gap that Medicare specifically does not fill — long-term custodial care — while also providing a tax-efficient income stream whose treatment may be favorable for MAGI management. Fixed annuities with long-term care benefits combine principal protection and guaranteed crediting with built-in long-term care coverage — addressing both the healthcare cost gap and the income need within a single contract. Long-term care insurance with shared spousal benefits addresses the extended care coverage need that Medicare does not fund — protecting retirement assets from custodial care costs that represent the largest uninsured financial risk for most retirees.

Retirement Account Distributions, Required Minimum Distributions, and IRMAA

How retirement account distributions are taxed — and specifically how traditional IRA and 401k distributions increase MAGI dollar-for-dollar — is the core tax planning variable in IRMAA management, because required minimum distributions from traditional accounts are mandatory and non-negotiable after a defined age, potentially pushing beneficiaries into IRMAA tiers they could otherwise avoid through earlier Roth conversion or structured withdrawal planning. Annuity income as a structured monthly retirement income source is part of the retirement income architecture that determines MAGI in every retirement year — and the specific tax treatment of each income source’s distributions is a planning input that affects both income tax liability and IRMAA tier placement simultaneously. The best annuity for guaranteed income in a specific planning situation is identified in part by how its income tax treatment interacts with the beneficiary’s total retirement income picture and IRMAA management objectives. Lifetime income annuities that produce guaranteed monthly income for life are retirement income planning tools whose MAGI impact — qualified versus non-qualified, annuitization versus GLWB withdrawals — is a Medicare premium planning variable worth incorporating into the income structure decision. How annuities compare to 401k plans for retirement income production includes the MAGI and IRMAA dimension — qualified 401k distributions are fully included in MAGI, while non-qualified annuity distributions tax only the earnings portion above cost basis, creating a structural MAGI difference between income sources of the same gross dollar amount. Life insurance in retirement for Medicare beneficiaries addresses the survivor income dimension — ensuring that a surviving spouse’s future income, following the first death, is structured in a way that manages IRMAA tier placement going forward. The Social Security filing checklist is a practical planning tool that intersects with Medicare premium planning — because the claiming decision determines not just lifetime Social Security income but the MAGI trajectory in the years following the claim. Deemed filing rules for Social Security affect income timing — when both a retirement benefit and a spousal benefit are filed simultaneously, the aggregate Social Security income entering MAGI in the claim year affects subsequent IRMAA determinations. Annuity strategies for early retirees specifically address the pre-Medicare income management challenge — structuring income during the years before Medicare eligibility in ways that both fund retirement living expenses and position the MAGI calculation favorably for the IRMAA determination in the first Medicare years. Whether working past 65 affects Social Security benefits is also a Medicare premium planning question — earned income from continued work increases MAGI and may push the beneficiary into higher IRMAA tiers even if other retirement income sources fall below the threshold. Annuity planning in the 40s and 50s establishes the income and tax structure that will determine MAGI in retirement decades later — the choice between qualified and non-qualified annuity premium funding, between income rider and SPIA income structures, and between immediate and deferred income activation all affect the MAGI calculation when IRMAA thresholds become relevant. The annuity rescue plan process reviews existing annuity positions to identify whether repositioning — including 1035 exchanges to more tax-efficient income structures — can improve the MAGI and IRMAA impact of the annuity income within the broader retirement income plan. Whether Social Security benefits are being fully optimized requires comparing the after-IRMAA Social Security increase against any additional premium cost triggered — net benefit optimization rather than gross benefit optimization. Social Security income limits for beneficiaries who are still working interact with both the earnings test before full retirement age and the MAGI calculation that determines IRMAA — producing a multi-variable planning situation where work income, Social Security income, investment income, and retirement account distributions all feed into a single MAGI figure. Delayed retirement credits that increase Social Security between full retirement age and 70 also increase the Social Security component of MAGI — a consideration in the IRMAA management analysis when delayed Social Security income would push the beneficiary into a higher tier. The Medicare resource library at Diversified Insurance Brokers provides ongoing educational content covering Medicare plan changes, premium updates, and IRMAA developments as CMS releases them each year — because the annual nature of Medicare premium adjustments makes ongoing education a continuous planning resource rather than a one-time reference.