If you have spent decades building wealth in tax-deferred accounts, retirement brings a shift most people underestimate: the government starts collecting. IRAs, 401(k)s, and pensions that grew tax-free for 30 years become fully taxable income the moment you withdraw. The rules governing when, how much, and at what rate you pay are where the hazards live.
Here are five tax hazards that catch high-net-worth retirees off guard and what you can do about each.
The Widow Penalty
When a spouse dies, the surviving spouse loses the married filing jointly (MFJ) tax brackets and files as single. The brackets roughly cut in half, but the income often does not.
The surviving spouse typically inherits the deceased spouse's IRA, keeps the larger of the two Social Security benefits (as a survivor benefit), and retains income from any joint investments. The result: nearly the same income taxed at significantly higher rates.
For 2026, the 24% bracket for MFJ filers covers taxable income up to $203,501. For a single filer, the 24% bracket ends at $101,751. A surviving spouse with $300,000 in retirement income who was comfortably in the 24% bracket as MFJ may now be in the 32% or 35% bracket as a single filer.
The widow penalty also triggers Medicare IRMAA surcharges. IRMAA uses modified adjusted gross income from two years prior. A surviving spouse who was below the IRMAA threshold as MFJ ($218,000 for 2026) may exceed the single-filer threshold ($109,000 for 2026) with the same income, adding hundreds of dollars per month in Medicare Part B and Part D premiums.
Planning strategies include accelerating Roth conversions while both spouses are alive, repositioning assets to reduce taxable income after the first death, and ensuring the estate plan accounts for the tax bracket shift. For a deeper look at the financial considerations after losing a spouse, see our guide on financial planning after the death of a spouse.
Required Minimum Distributions
Required minimum distributions begin at age $73, raw (rising to $75, raw in 2033 under SECURE 2.0). The IRS calculates your RMD by dividing your December 31 account balance by a life expectancy factor from the Uniform Lifetime Table. At age $73, raw, the factor is approximately 26.5, producing an RMD of roughly 3.8% of the account value. By age 85, the factor drops to approximately 16.0, forcing out about 6.3%.
The penalty for missing an RMD is $25, pct of the amount not withdrawn (reduced to $10, pct if corrected within two years). These are steep penalties that compound the tax hit.
For retirees with large traditional IRAs, RMDs create a floor of taxable income that rises every year. Combined with Social Security benefits and any pension income, RMDs can push you into higher brackets, trigger IRMAA surcharges, and increase the taxable portion of Social Security from 50% to 85%.
The most effective mitigation is Roth conversion strategies executed in the years between retirement and the start of RMDs. Converting traditional IRA funds to a Roth in lower-income years locks in a lower tax rate and eliminates future RMDs on those dollars. The optimal annual conversion amount depends on your current bracket, projected future income, and how much room exists before triggering IRMAA or other thresholds.
For a comprehensive framework on which accounts to draw from and when, see our guide on retirement distribution planning.
The Inherited IRA Squeeze
The SECURE Act (2019) eliminated the stretch IRA for most non-spouse beneficiaries. Your children who inherit your traditional IRA must now withdraw the entire balance within 10 years of your death. If they are in their peak earning years (ages 45-55), adding a large IRA distribution on top of their own income can push them into the highest brackets.
The IRS clarified in final regulations (2024) that beneficiaries who inherited from someone already taking RMDs must take annual distributions within the 10-year window, not just empty the account by year 10. This accelerates the tax hit further.
Exceptions exist for eligible designated beneficiaries: surviving spouses, minor children (until majority), disabled or chronically ill individuals, and beneficiaries not more than 10 years younger than the deceased. These beneficiaries can still stretch distributions over their life expectancy. For families with a disabled beneficiary, this exception is a significant planning tool.
The planning response: Roth conversions while you are alive shift the tax burden from your heirs to you at (ideally) a lower rate. Inherited Roth IRAs still must be distributed within 10 years, but the distributions are tax-free.
Estate Tax Exposure
The federal estate tax exemption for 2026 is $15,000,000 per individual ($30,000,000 for married couples). The One Big Beautiful Bill Act (July 2025) made this elevated exemption permanent, removing the uncertainty around a potential reversion to approximately $7 million that had driven estate planning urgency for years.
For most retirees, the permanent $15 million exemption means federal estate taxes are not a concern. But do not ignore estate planning as a result. State estate taxes apply in 12 states plus DC, many with exemptions far below the federal level (as low as $1 million in Oregon and Massachusetts). And the permanent exemption can change with future legislation.
More practically, the structure of your estate plan determines how efficiently assets transfer and how much your heirs pay in income taxes. An IRA left to a trust with poorly drafted distribution provisions can produce worse tax outcomes than a direct beneficiary designation. Portability elections, beneficiary designations, trust structures, and the interplay between estate and income taxes all require coordination.
For families with special circumstances, including a child with a disability or complex trust structures, the planning is more involved but also more consequential. See our guide on estate planning fundamentals.
Medicare IRMAA Surcharges
Income-Related Monthly Adjustment Amounts (IRMAA) are surcharges on Medicare Part B and Part D premiums for higher-income beneficiaries. IRMAA uses your modified adjusted gross income from two years prior (so your 2024 income determines your 2026 IRMAA).
For 2026, the first IRMAA threshold is $109,000 for single filers and $218,000 for MFJ. Above those levels, surcharges apply in tiers. At the highest tier (single income above $500,000 or MFJ above $750,000), the Part B premium roughly triples.
The hazard is that IRMAA creates effective marginal tax rates that are invisible if you are only looking at income tax brackets. A Roth conversion, capital gain realization, or large RMD that pushes you just above an IRMAA threshold adds $1,000-$5,000+ in annual Medicare premiums per person on top of the income tax.
Effective IRMAA management requires modeling your projected income two years forward and timing discretionary income events (Roth conversions, asset sales, Roth backdoor contributions) to stay below thresholds where possible. Life-changing events (retirement, death of a spouse, divorce) can trigger an IRMAA appeal using Form SSA-44 to use current-year income instead of the two-year lookback.
Connecting the Hazards
These five hazards do not operate independently. An RMD that pushes you into a higher bracket also triggers IRMAA. The widow penalty amplifies both. A large inherited IRA compounds your children's own RMD and IRMAA exposure decades later. Estate planning that ignores the income tax consequences of inherited IRAs misses the point.
The common thread is that tax-deferred accounts, which served you well during accumulation, create compounding tax obligations during distribution. The planning window between retirement and the start of RMDs (and Social Security) is the highest-leverage period to reposition.
For help evaluating how these hazards intersect in your situation, start a conversation with us.
