The Best Retirement Tax Window May Come Before Social Security and RMDs
Some of the most valuable tax-planning years in retirement can arrive before Social Security and required minimum distributions begin. A couple who leaves work with substantial savings may suddenly move from peak earning years into a period with relatively little taxable income. That window can create opportunities to convert traditional retirement accounts to Roth accounts, realize capital gains strategically and reduce taxes that might otherwise arrive later.
The opportunity can be especially important for households with several million dollars spread across taxable investments, retirement accounts and real estate. Their problem is often not whether they have enough money to retire. It is deciding which assets to spend, which assets to convert and how much taxable income to intentionally create before future income becomes less controllable.
Low-Income Years Can Be More Valuable Than They Look
Imagine a retired couple with roughly $3 million in total assets and about $130,000 in annual spending. If pensions and other fixed income cover part of that budget, they may need around $80,000 a year from investments. On a $3 million portfolio, that represents a withdrawal rate of roughly 2.7%, leaving substantial flexibility in how those withdrawals are structured.
That flexibility matters because taxable income can look very different from cash flow. Spending $130,000 does not necessarily mean reporting $130,000 of ordinary taxable income. Some money may come from taxable-account principal, long-term capital gains, cash reserves or other sources that receive different tax treatment.
Those years can therefore become deliberate tax-planning years rather than simply years with unusually small tax bills. The objective is to use lower brackets while they are available instead of waiting until future distributions force income higher.
Roth Conversions Can Reduce Future RMDs
One of the most powerful tools is a Roth conversion. Money moves from a traditional IRA into a Roth IRA, creating taxable income in the year of conversion. The trade-off is that the converted money can then grow in the Roth, where qualified withdrawals are generally tax-free and the original owner is not subject to lifetime RMDs.
For 2026, married couples filing jointly remain in the 22% federal income-tax bracket until taxable income exceeds $211,400, when the 24% bracket begins. That can create substantial room for conversions when employment income has disappeared.
But automatically “filling the 22% bracket” is not always the right answer. A conversion can affect capital-gains taxation, Medicare premiums and other income-sensitive provisions. The correct conversion amount is the one that improves the household’s lifetime tax result, not simply the largest amount that fits below the next tax bracket.
Medicare Creates a Second Set of Thresholds
Tax brackets and Medicare thresholds are separate calculations. In 2026, Medicare’s first IRMAA surcharge begins above modified adjusted gross income of $109,000 for an individual or $218,000 for a married couple filing jointly. Higher income can increase both Part B and Part D costs.
That means a Roth conversion can remain inside the 22% tax bracket while still pushing income into a higher Medicare tier. Conversely, accepting a modest IRMAA surcharge may still be worthwhile if the conversion prevents much larger future RMDs.
The two-year Medicare lookback adds another wrinkle. Income generated this year generally affects Medicare premiums later, so retirees should evaluate the future surcharge alongside the immediate tax bill.
Avoiding IRMAA at all costs can be just as shortsighted as ignoring it. If paying several thousand dollars more in Medicare premiums allows a household to move a much larger amount into a Roth at an attractive tax rate, the long-term trade-off may still favor the conversion.
RMDs Eventually Reduce Your Control
The opportunity becomes more valuable because required minimum distributions eventually force taxable money out of retirement accounts. Under SECURE 2.0, the applicable RMD age is 73 for many current retirees, while people who reach the later statutory age under the newer rules may begin at 75.
Before RMDs begin, retirees generally decide how much to withdraw from traditional retirement accounts. Afterward, the government establishes a minimum amount based largely on the previous year-end balance and an IRS life-expectancy factor.
A large IRA can therefore become a tax-management problem even when the retiree does not need the distribution for spending. Those withdrawals can stack on top of Social Security, pensions and investment income, potentially pushing the household into higher tax and Medicare brackets.
Reducing the account gradually before RMD age can preserve more control later.
Social Security Timing Is Part of the Same Plan
Delaying Social Security can strengthen the tax-planning window because it leaves fewer income sources competing for lower brackets. For people born in 1960 or later, full retirement age is 67, and delaying until 70 increases the monthly retirement benefit to 124% of the full-retirement-age amount. Benefits stop increasing after age 70.
That does not make delaying universally best. Someone with health concerns, limited savings or a strong preference for earlier income could reasonably claim sooner. Married couples also need to consider survivor benefits rather than evaluating each spouse independently.
But for a household with significant liquid assets and little immediate need for Social Security, delaying can create two potential advantages. It may increase guaranteed lifetime income later while leaving several additional years available for Roth conversions and capital-gains planning.
The claiming strategy should therefore be coordinated with taxes rather than decided in isolation.
Taxable Investments Can Fund the Bridge
Households with substantial non-retirement assets have another advantage: liquidity. Taxable investment accounts can help pay living expenses without automatically creating the same amount of ordinary income as a traditional IRA withdrawal.
Selling appreciated investments may generate long-term capital gains, while selling positions at a loss can potentially offset gains elsewhere. A diversified taxable portfolio creates more opportunities to choose which assets to sell rather than being forced to liquidate one large holding.
That is one reason holding an entire taxable portfolio in a single investment can reduce tax flexibility. Broad diversification may still exist inside one ETF, but if the ETF itself has a gain, there may be no separate losing positions available for tax-loss harvesting.
Tax management should not drive the investment strategy, but good portfolio construction can provide more options when large gains need to be realized.
Real Estate Adds Another Layer
Real estate can create particularly large tax decisions because selling appreciated property may generate capital gains and potential depreciation recapture. A couple expecting a six-figure tax bill from selling rental property may understandably look for ways to defer or reduce it.
Strategies such as a 1031 exchange can defer qualifying real-estate gains when the requirements are satisfied, but complexity should not become the goal. If the household no longer wants to own rental property, exchanging into another property solely to avoid tax can preserve a management burden that no longer fits the retirement plan.
Sometimes paying the tax and simplifying the balance sheet is the better decision. The appropriate comparison is between the tax cost today and the financial, estate and lifestyle consequences of continuing to hold the property.
That becomes especially relevant for retirees planning to downsize, move to another state or reduce the amount of real estate they manage.
The Widow’s Tax Problem Makes Early Planning More Valuable
Tax planning also needs to look beyond both spouses’ lifetimes together. When one spouse dies, the survivor may eventually move from married-filing-jointly brackets to much narrower single-filer brackets while inheriting much of the same investment and retirement wealth.
That can make future RMDs more painful. The surviving spouse may receive only one Social Security benefit but continue taking distributions from large retirement accounts while facing lower tax and Medicare thresholds.
Roth conversions completed while both spouses are alive can help reduce that exposure. Paying tax while married and using wider joint brackets may leave the survivor with more tax-free assets later.
This is one reason retirement tax planning should extend 20 or 30 years rather than optimizing only the couple’s current return.
Down Markets Can Create Conversion Opportunities
Market declines can also create opportunities. If a traditional IRA falls from $1 million to $800,000 during a bear market, converting a fixed percentage of the account means paying tax on temporarily depressed values.
If the investments eventually recover inside the Roth, that rebound occurs in the tax-free account rather than the traditional IRA. That can make down years attractive times to revisit a conversion schedule.
The strategy still depends on available tax brackets and cash to pay the resulting tax. Selling additional IRA assets simply to cover the conversion tax can reduce some of the benefit, particularly for younger retirees facing penalties or other constraints.
This is why flexibility matters more than committing to exactly the same conversion amount every year.
The Goal Is Not the Lowest Tax Bill This Year
The central mistake in retirement tax planning is trying to minimize every individual year’s tax bill. A retiree may proudly pay almost nothing at 62 while allowing a multimillion-dollar IRA to continue growing toward much larger RMDs later.
Paying more tax voluntarily during low-income years can produce a better lifetime result. That may mean Roth conversions, realizing gains or deliberately filling portions of a tax bracket that would otherwise go unused.
It can also mean accepting an occasional Medicare surcharge when the larger strategy justifies it.
The goal is not zero taxes. It is controlling when income appears and using the most favorable years available.
Retirement Creates a Window That Eventually Closes
A household with significant taxable assets, retirement accounts and real estate may have tremendous flexibility immediately after leaving work. Social Security has not started, RMDs have not arrived and wages may have disappeared.
Those are the control years.
They provide an opportunity to simplify assets, reduce future IRA balances, coordinate capital gains and decide how much taxable income to intentionally recognize. Once Social Security and mandatory distributions begin, much of that flexibility can shrink.
Retirees who wait until RMDs become a problem may still have options, but fewer of them. Those who plan earlier can choose which taxes to pay now in an effort to prevent larger tax bills later.
That is the bigger lesson behind Roth conversions and retirement-income planning: sometimes the best tax strategy is not avoiding income. It is choosing the right years to create it.
