Five Retirement Tax Explosions You Can Plan Around
For many retirees, taxes ultimately become one of the largest expenses they will pay throughout retirement. Unlike inflation or market volatility, taxes are largely predictable and are one of the few retirement expenses that can often be influenced through proactive planning. The challenge is that many retirees don't recognize the problem until several of these tax rules begin affecting them simultaneously.
I think of these as five retirement tax explosions. Individually they can be costly. Combined, they can significantly reduce retirement income, increase healthcare costs, and leave less wealth available for your family. Understanding these risks is the first step toward managing them.
Tax Explosion #1 – Required Minimum Distributions
For many successful retirees, Required Minimum Distributions (RMDs) become one of the largest ongoing tax burdens in retirement and requires significant attention.
Traditional retirement accounts allow you to postpone paying taxes while you're working. Eventually, however, those taxes come due. Under current law, most retirees must begin Required Minimum Distributions (RMDs) beginning at age 73, although this age varies depending on birth year.
For retirees who have accumulated significant tax-deferred savings, this can become one of the biggest "burns" in retirement. A household with $5 million or more in traditional retirement accounts may eventually be required to withdraw hundreds of thousands of dollars annually as IRS distribution percentages increase with age. Those withdrawals push retirees into higher tax brackets while also affecting other areas of their financial life.
The impact often extends beyond your lifetime. Under the SECURE Act of 2019, as modified by SECURE 2.0, non-spouse beneficiaries must distribute inherited retirement accounts within ten years. For children who are already in their peak earning years, those inherited dollars may be taxed at some of the highest marginal tax rates of their lives, sending a larger portion of your retirement savings to the government rather than your family.
The encouraging news is that this is one of the most planning-intensive opportunities in retirement. Identifying the issue early can create opportunities to gradually reduce future tax exposure through effective conversion and charitable giving strategies. For some families, proactive planning over many years may reduce lifetime taxes by hundreds of thousands of dollars while preserving more wealth for future generations.
Tax Explosion #2 – Social Security Taxation
One of the most common misunderstandings in retirement is how Social Security benefits are taxed.
Depending on your total income, Social Security can be either completely tax free or up to 85% of your Social Security benefits may become taxable. While this does not mean you lose 85% of your benefit, it does mean a significant portion may be included in your taxable income.
What surprises many retirees is that this taxability can increase quickly as they increase IRA withdrawals, or harvest capital gains as they all work together to determine how much of your Social Security becomes taxable. Increasing income from one source can unintentionally increase the taxes on your social security and it can feel like chasing a ball down a hill.
Thoughtful income planning can often reduce these unintended consequences, which is why withdrawal strategies are just as important as investment strategies once retirement begins.
Tax Explosion #3 – Medicare IRMAA
Most retirees understand that Medicare has premiums. Fewer realize those premiums increase as taxable income rises.
These income-related surcharges, known as IRMAA (Income-Related Monthly Adjustment Amount), can become a meaningful expense for higher-income retirees. Once you cross that line, you are stuck there for 2 years. Many retirees don't realize that a one-time Roth conversion, the sale of a business, or even a large capital gain can temporarily move them into a higher IRMAA tier.
For 2026, married couples filing jointly generally begin paying higher Medicare premiums once modified adjusted gross income exceeds approximately $222,000. For many, they will never hit the first surcharge. However, if there is a sudden inheritance that requires distributions, or income from Roth conversions, or the realization of capital gains, a retiree may move through multiple surcharge tiers before they know it. While the first Tier is generous in depth the successive tiers are very close together. By the second and third IRMAA brackets, a married couple may pay several thousand dollars more each year for the same Medicare coverage. At the highest income levels, combined Part B and Part D surcharges for both spouses can exceed $15,000 annually.
Perhaps the most frustrating aspect of IRMAA is that Medicare generally uses tax returns from two years earlier. A large Roth conversion, property sale, or unusually high-income year today may result in higher Medicare premiums well after the decision was made.
Because IRMAA is driven by taxable income rather than investment performance, careful tax planning can often reduce unnecessary healthcare costs over time.
Tax Explosion #4 – Capital Gains and Asset Location
Taxes don't only come from retirement accounts.
Many retirees spend years building equity in highly appreciated real estate or investment portfolios. Unfortunately, selling those assets without considering the tax consequences can create unexpected costs that ripple through the rest of a retirement plan by unintentionally increasing taxable income, trigger higher Medicare premiums, or affect the taxation of Social Security benefits.
Equally important is where investments are held. Different assets receive different tax treatment depending on whether they are held in taxable brokerage accounts, traditional retirement accounts, Roth accounts, or in appreciated real estate. Coordinating asset location with skilled withdrawal planning can improve tax efficiency over many years.
Managing taxes in retirement is rarely about one transaction. It is about understanding how each financial decision affects the next.
Tax Explosion #5 – The Widow's Tax Penalty
Few retirement tax issues have more of an emotional impact and receive less attention than what happens after the loss of a spouse.
During one of life's most difficult seasons, a surviving spouse often faces more than emotional loss. They may lose one Social Security benefit, move from the favorable Married Filing Jointly tax brackets to the narrower Single tax brackets, and lose a portion of the standard deduction. At the same time, Required Minimum Distributions and investment income may remain largely unchanged.
In many cases, household expenses don't decline much. The result is that many widows and widowers pay higher taxes while living on less income.
It is, in many ways, a financial burden that arrives when families are already carrying an emotional one.
Although no planning strategy can remove the pain of losing a spouse, thoughtful tax planning can help reduce one of the financial challenges that often follows. Gradually building tax-free sources of retirement income over many years may provide greater flexibility when one spouse is left to manage retirement alone.
The Common Thread
Each of these retirement tax explosions is significant on its own. Together, they create a much larger planning challenge because they compound.
A larger Required Minimum Distribution may increase the taxation of Social Security benefits. Higher taxable income can trigger Medicare IRMAA surcharges. The remaining tax-deferred assets may eventually create a larger burden for a surviving spouse or beneficiaries.
These are rarely isolated events. They are pieces of a much larger retirement income strategy. This is why comprehensive retirement planning isn't simply about reducing one tax. It's about understanding how every financial decision affects the rest of the retirement plan.
The encouraging news is that many of these challenges can be identified years before they become costly. While no two retirement plans are alike, proactive tax planning often creates opportunities to reduce lifetime taxes, improve retirement income flexibility, and preserve more wealth for the people and causes that matter most.
For many Retirees, working with a financial advisor is limited to just helping with investing their retirement accounts. Comprehensive financial planning integrates investment management, retirement income, tax planning, estate planning, healthcare planning, and risk management into one coordinated strategy designed to help families keep more of what they've spent a lifetime building.
Every retirement plan eventually encounters these tax challenges. The difference is whether they arrive as expected with a strategy already in place—or as costly surprises. Having a planner guide you in your options before these retirement tax explosions occur can make a meaningful difference in the amount of wealth you keep, the taxes you pay, and the legacy you leave behind.
Questions Worth Asking
- How much of my retirement savings is currently tax-deferred?
- Could future RMDs push me into a higher tax bracket?
- Am I likely to pay IRMAA surcharges?
- How would my spouse's taxes change if I passed away first?
- Have I coordinated my tax strategy with my estate plan?
References
- Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs).
- Internal Revenue Service. Publication 590-B: Distributions from Individual Retirement Arrangements (IRAs).
- Internal Revenue Service. Publication 915: Social Security and Equivalent Railroad Retirement Benefits.
- Internal Revenue Service. Topic No. 409 – Capital Gains and Losses.
- Centers for Medicare & Medicaid Services. Medicare Part B Premiums and Income-Related Monthly Adjustment Amount (IRMAA).
- Social Security Administration. Retirement Benefits.
- SECURE Act of 2019 created the 10-year distribution rule.
- SECURE 2.0 changed RMD ages and other retirement provisions.