Key Takeaways:
- The two-year lookback means Medicare premiums are usually based on income from two years earlier, not what you earn this year.
- An income-related monthly adjustment amount (IRMAA) is Medicare’s income-based add-on, and it increases costs in tiers rather than marginally.
- Conversions should be coordinated with Social Security, gains, pensions, and future required distributions to avoid stacking issues.
Roth conversions are often discussed as a tax strategy, yet they can also affect what you pay for Medicare. When a conversion raises the income on your tax return, it can raise Medicare premiums later through your income-related monthly adjustment amount (IRMAA). That connection is easy to miss, especially when the conversion feels like “moving money” rather than creating new income.
For Albany, New York, retirees, the conversion decision also runs through the state tax layer. New York can adjust the cost of conversion, while IRMAA can alter the price of Medicare coverage in later years. A good approach brings those pieces into one view, so the conversion helps your plan instead of adding avoidable expenses.
How Roth Conversions Affect Medicare Premiums
A conversion is a taxable event, even if the money never touches your checking account. The dollars you move are treated as taxable income for the calendar year the conversion occurs, and that’s the number Medicare later references when it sets what you owe.
Medicare pricing has a base layer and then income-based add-ons for certain parts. Part B (e.g., doctor visits, outpatient care, durable medical equipment) and Part D (prescription drug coverage) can use reported income to add monthly surcharges on top of your plan’s premium.
This is where the “accounting vs. reality” gap shows up. A conversion can raise your reported income, which can raise your total Medicare costs, even when your spending stays flat. The key is that Medicare isn’t measuring whether you spent more; it’s reacting to what your return says you have coming in.
Understanding IRMAA and Why It Matters
Medicare has a standard pricing layer, then adds an extra charge for higher-income households. That extra charge is the income-related monthly adjustment amount (IRMAA), and it applies to Part B and Part D costs on top of what you’d otherwise pay.
The trigger is the modified adjusted gross income (MAGI) pulled from your federal tax return data. MAGI generally starts with adjusted gross income and then adds back items such as tax-exempt interest, which means your “headline” taxable number is not the only thing that can affect the result.
The key detail is that IRMAA moves in tiers rather than increasing gradually. Crossing a threshold can change your tier and increase what you pay for the full premium period tied to that determination, even if you only cleared the line by a small amount. Households with strong cash flow still care, since these recurring charges can stack onto baseline coverage and show up as IRMAA surcharges unless you plan around your full gross income picture.
Roth Conversions and IRMAA
A conversion can be the single biggest “income-looking” item on your return in a given year, which is why it’s so often the trigger for income-based Medicare pricing. If your baseline income is already near one of the IRMAA thresholds, a conversion can push you over the line quickly.
The tier design is what makes sizing matter. A large converted amount can move you through multiple tiers at once, which can turn “a little more income” into a noticeably higher premium. The impact also hits per covered person. Even if income comes from one tax return, a tier bump can apply to two spouses if both are on Medicare.
The toughest part is timing: people often learn about the surcharge after the conversion year is over. By then, the return is filed, and the decision is in the rearview mirror, which is why planning around IRMAA brackets is often about avoiding accidental jumps, not avoiding conversions.
The Two-Year Lookback Rule and Medicare Timing
Income-based Medicare pricing uses a two-year lookback. The modified adjusted gross income (MAGI) used to set the current year’s premiums typically comes from your tax return from two years earlier.
That lag is the root of many surprises. A high-income year can fade from memory, then Medicare pricing changes later, and you feel disconnected from your current reality. A conversion that felt “contained” to one tax season can land as a premium change two years later.
Early retirement years are the classic example. If you retire at 63, convert aggressively at 64, and enroll at 65, the pricing effect can show up right after you feel like the transition is complete. A calendar-first approach reduces those surprises.
New York State Taxes and Roth Conversions for Albany Retirees
Albany retirees often focus on federal tax first, then realize New York follows the same signal. The converted dollars moved into Roth are generally treated as income for the year of the transaction (for pre-tax amounts), so the conversion can raise both federal and New York taxable figures at the same time.That matters most when your household already has steady income sources, and the conversion is effectively “stacked” on top.
Stacking changes the marginal price of the decision. If the conversion pushes you into a higher tax bracket, the top portion of the conversion is effectively priced at higher tax rates, even if the early portion of the conversion is cheaper. Married filing rules influence where the bracket lines sit for your household, and a smaller-than-expected deduction can remove the cushion you were counting on when you picked your conversion number.
Federal ordinary-income rates run from 10% to 37%.1 New York State’s main personal income tax rates range from 4% to 10.9%.2 A conversion plan built for Albany usually treats those ranges as the baseline “cost of flexibility,” then uses targeted sizing to keep the conversion from being priced at the most expensive marginal layer unless there’s a clear payoff.
Coordinating Roth Conversions With Other Income Sources
Conversions rarely happen in a vacuum, and Albany retirees often have multiple income levers moving at once. Medicare pricing and taxes respond to your total picture, so the key is coordinating what gets “turned on” in a given year. A conversion can be a useful lever, yet it behaves differently depending on where your cash flow is coming from. A good approach starts with mapping what will hit your return and when, then checking how the parts interact with Social Security and portfolio income:
Social Security benefits and provisional income
Conversions can increase the income that drives how much of your benefit becomes taxable, even if your spending stays the same. That can lead to a double effect: more taxable income from the conversion itself and more benefit dollars pulled into taxation. This is one reason conversion sizing often gets more delicate after you start claiming.
Capital gains and portfolio income
Investment activity can amplify the impact of a conversion, especially in years when you harvest gains or rebalance heavily. A conversion layered on top of gains can push your totals into ranges you didn’t expect. Interest matters too, including tax-exempt interest that may not be taxable but can still affect income-based calculations.
Required distributions and pension income
Fixed income sources reduce flexibility once they begin, which is why retirees often try to front-load conversions before the “floor” rises. Future required minimum distributions (RMDs) from pre-tax accounts can also narrow your choices later, even if you feel flexible today. Pensions are a common variable for many NY households, and a pension start date can quietly reset what a “safe” conversion looks like.
Income stacking across the tax return
The order in which your income fills the return changes what each extra conversion dollar “costs.” Wages, pensions, RMDs, interest, and realized gains can fill lower brackets first, which means the conversion dollars you add later may land in a higher marginal layer (and can also change what deductions/credits you actually keep). Modeling the stack lets you choose conversion sizes that fit the year’s real capacity instead of guessing from last year’s totals.
Strategies to Reduce IRMAA Exposure When Using Roth Conversions
Conversions can be valuable, and the way you schedule them often decides whether the extra costs feel manageable or frustrating. The practical approach is to treat IRMAA like a set of guardrails and size conversions with those guardrails in mind, rather than waiting for a notice later. This is where the right strategies can reduce surprise costs without giving up long-term flexibility:
Spreading conversions over multiple years
A single large conversion can move you through multiple tiers at once, which is why pacing tends to produce cleaner outcomes. Spreading conversions gives you more control over landing near, rather than beyond, IRMAA income thresholds.
Using pre-Medicare years intentionally
Years before Medicare starts can be used for heavier conversion work, since you’re not simultaneously trying to stay inside Medicare tier lines. The decision becomes a pure tax-and-cash-flow tradeoff, and that can be easier to control than converting after enrollment.
Aligning conversions with lower-income windows
Retirement gaps, delayed Social Security claiming, or a year between a job ending and a pension starting can create a rare low-income window. These windows are often where you can convert meaningfully without falling off an IRMAA cliff, since less “baseline income” is already occupying your tier capacity.
Monitoring thresholds proactively rather than reactively
Track projected MAGI as the year unfolds, including gains, interest, and anything that changes your total. Proactive tracking lets you adjust conversion size late in the year and quantify the true IRMAA impact of each additional dollar converted.
Roth Conversions and IRMAA: When Paying More May Still Be the Right Tradeoff
A higher Medicare bill doesn’t automatically mean you made a bad move. The decision is whether the near-term premium increase is the price of reducing a bigger long-term constraint, like future forced distributions or loss of tax flexibility. Conversions can shift income from “forced later” to “chosen now,” and Medicare tier pricing becomes one component of the conversion’s marginal cost. They may be worth a higher cost in some instances:
Avoiding IRMAA entirely can backfire
Dodging tier lines at all costs can keep too much money in pre-tax accounts, which can grow into a forced-distribution problem later. That can push future taxable income higher for longer, creating a larger and more persistent tax drag than a short-term IRMAA hit would have been.
Higher premiums now may support flexibility later
Paying more now can help build a Roth account large enough to fund irregular spending without adding taxable income later. That flexibility can be valuable in years when you want to manage brackets tightly, control surtax exposure, or keep Medicare tiers stable.
Earlier conversions can help with survivor and longevity planning
When one spouse dies, the survivor often moves into a less favorable filing status and can face higher effective rates on the same income. Conversions while both spouses are alive can reduce future forced distributions and protect retirement savings by giving the survivor a larger pool of tax-free funding options.
Please Note: A clean decision weighs the all-in marginal cost (federal, New York, and Medicare costs) against what you gain in long-term control. Strong retirement planning and financialplanning treat health care and ongoing expenses as core constraints, then decide how much conversion “cost” you’re willing to pay now to buy more control over your money later.
Common Roth Conversion and Medicare Planning Mistakes
Most conversion mistakes are really forecasting mistakes. People model one year, then real life changes the inputs (portfolio gains show up, deductions differ, income timing shifts), and the plan doesn’t adapt. Medicare pricing adds another layer, so the cost of being “slightly wrong” can be higher than expected. These are pitfalls many retirees hit:
Treating Roth conversions as a one-year tax move
One-year thinking often leads to oversized conversions that ignore second-order effects like lost deductions/credits and tier-based Medicare pricing. A multi-year sequence can convert the same total amount with less collateral cost, even if the yearly conversions are smaller.
Ignoring Medicare implications until enrollment
Waiting until Medicare starts can eliminate the best conversion years, especially if pensions or RMDs begin around the same time. Late planning can force you to choose between skipping conversions or accepting higher Medicare surcharges with less ability to control the trigger.
Focusing on tax brackets instead of IRMAA tiers
A bracket-based plan might aim to “fill” a bracket, yet an IRMAA tier jump can change the marginal cost of the last dollars converted. Tier modeling is required when Medicare is part of the picture.
Overlooking the New York state tax impact
State tax changes the marginal price of conversion dollars, which can change which years are worth using. A state-aware plan may shift conversions earlier, later, or smaller than a federal-only plan would.
Failing to reassess annually
A static plan can’t respond to changing income, gains, or deductions. That’s the path to accidental Medicare premium surcharges and loss of control over income in retirement, especially when your retirement account mix is meant to give you flexibility.
Roth Conversions and IRMAA FAQs
1) How long does IRMAA apply after a Roth conversion?
IRMAA is usually set using your tax return from the past two years, so the premium change tends to show up later rather than in the same year you convert. If the conversion creates a one-time income spike and your later returns drop back down, the higher amount typically lasts only until a lower-income year becomes the one used for the lookback.
2) Can IRMAA be reduced if income drops later?
A lower-income year can lead to lower IRMAA in future years once it becomes the lookback year.Faster relief can be possible after certain life-changing events. Social Security’s guidance points to requesting a reduction and using Form SSA-44.3
3) Do Roth conversions affect Medicare Advantage plans?
Medicare Advantage doesn’t remove Part B-based income adjustments, and Part D-related adjustments can still apply if drug coverage is included.Those income-based surcharges are tied to your tax return, not the plan brand.
4) Is IRMAA calculated separately for married couples?
Filing status affects which income thresholds apply, and then the resulting adjustment is charged to each covered individual. Two spouses on Medicare can each owe an income-based add-on.
5) What is the IRMAA “cliff,” and how is tier modeling different from tax bracket modeling?
IRMAA uses tiers, so crossing a threshold doesn’t mean “the dollars above the line pay more.” It means your lookback income places you into a new tier, and the monthly add-on you pay is the tier’s amount, even if you only cleared the cutoff by a small margin.
Tax brackets are marginal and layered. Moving into a higher bracket does not re-tax your earlier dollars at the higher rate; only the slice above the bracket boundary is taxed higher. Tier modeling is step-based; bracket modeling is per-slice.
6) How should Albany retirees think about New York state taxes when deciding conversion size?
Model the marginal cost as “federal + New York + Medicare tier risk,” not just federal. New York’s brackets range from 4% to 10.9%, and federal ordinary-income brackets run from 10% through 37%. A well-built retirement strategy uses targeted tax strategies to pick a conversion size that fits your bracket and tier capacity instead of guessing.
How We Help Albany Retirees Coordinate Roth Conversions With Medicare Planning
Conversions can be a powerful lever, and they can also create unintended costs when timing and sizing aren’t coordinated. A clear plan ties your conversion schedule to Medicare’s pricing framework and New York’s tax costs, so you can make decisions with fewer surprises and more control.
Our financial advisory team can support you with multi-year modeling that includes Medicare tier sensitivity, proactive monitoring as income changes, and practical guardrails around conversion sizing. The goal is to give you clearer choices, like what happens if you convert more this year, what happens if you spread it out, and how each path affects flexibility and long-term outcomes.
Don’t wait to understand how a Roth conversion may or may not fit your situation. If you’d like help turning these ideas into a working plan tailored to your situation, schedule a complimentary consultation with our team.
Important Disclosures:
Content in this material is for educational and general information only and not intended to provide specific advice or recommendations for any individual.
This information is not intended to be a substitute for specific individualized tax advice. We suggest that you discuss your specific tax issues with a qualified tax advisor.
All information is believed to be from reliable sources; however, LPL Financial makes no representation as to its completeness or accuracy.
Resources:
- https://taxfoundation.org/data/all/federal/2026-tax-brackets/
- https://www.tax.ny.gov/forms/html-instructions/2025/it/it201i-2025.htm
- https://www.ssa.gov/medicare/lower-irmaa
John Gigliello, CFP®
John Gigliello, CFP®, is a fee-based fiduciary financial planner in Albany, NY, serving individuals age 50+ with comprehensive planning and investment management, centered around proactive and advanced tax planning. John earned a Certificate in Financial Planning from Boston University and, more recently, successfully completed the rigorous CFP® Certification examination to become a CERTIFIED FINANCIAL PLANNER™. John earned the Accredited Investment Fiduciary® Designation from the Center for Fiduciary Studies®, the standards-setting body for Fi360. The AIF® designation signifies specialized knowledge of fiduciary responsibility and the ability to implement policies and procedures that meet a defined standard of care. John currently serves on the Albany County Investment Advisory Board, having been appointed by a unanimous vote of the County Legislature in January 2019. In this position, John advises the county on a strategy for making the best use of money available for investment.