Jay Sharifi
October 20, 2025

If you’ve ever watched your investment portfolio dip during a volatile market, you know how frustrating those losses can feel. Watching hard-earned savings fluctuate can create anxiety, especially when you rely on those investments for retirement income. But what if those losses could actually work to your advantage?

Tax-loss harvesting is a strategy designed to help reduce taxes, optimize investment performance, and build a more tax-efficient retirement income strategy. By using market losses strategically, you can offset taxable gains, manage income from taxable brokerage accounts, and coordinate withdrawals from IRAs, 401(k)s, and Social Security. When applied thoughtfully, tax-loss harvesting becomes a cornerstone of smart retirement tax planning.

What Is Tax-Loss Harvesting?

Tax-loss harvesting is the process of selling investments that have declined in value to “harvest” a loss. These realized losses can then be used to offset capital gains from other investments. If losses exceed gains, up to $3,000 per year can be used to offset ordinary income, with any remaining losses carried forward in future years.

By leveraging this strategy, retirees can reduce taxable income and smooth out the timing of taxes over multiple years. This approach is particularly valuable for those managing taxable retirement income, as it can help minimize the amount of taxes you pay on your retirement income, manage Medicare IRMAA thresholds, and maximize after-tax returns.

Think of it as turning market volatility into an opportunity by using losses to create long-term advantages in your retirement investment strategy.

What Is IRMAA?

IRMAA (Income-Related Monthly Adjustment Amount) is an additional surcharge applied to Medicare Part B and Part D premiums for retirees with higher incomes. Medicare bases IRMAA on your modified adjusted gross income (MAGI) from your tax return two years prior.

Crossing certain income thresholds—even by a small amount—can increase your monthly Medicare premiums. Because tax-loss harvesting can reduce taxable income, it may help retirees stay below these IRMAA thresholds, preventing unnecessary premium increases and improving overall retirement cash flow.

Why Tax-Loss Harvesting Matters

in Retirement

For retirees, tax-loss harvesting is more than a year-end tactic. It can play a vital role in protecting income, reducing taxes, and improving long-term financial outcomes. Here’s why it’s essential:

1. Offset Capital Gains

Selling investments at a loss can counterbalance gains from other assets, reducing your taxable income. For example, if you sell shares of a stock that appreciated by $10,000, harvesting losses elsewhere can help offset the gain, lowering your retirement income tax bill and potentially keeping you below key IRMAA brackets that determine Medicare premium costs.

2. Rebalance Without Extra Taxes

Portfolio rebalancing is key to maintaining an appropriate level of risk. Tax-loss harvesting allows you to sell winners and purchase underweighted assets without triggering significant taxes. This creates a smoother, more tax-efficient retirement income strategy while keeping your portfolio aligned with your goals.

3. Coordinate With Roth IRA Conversions

Harvesting losses can reduce your taxable income, making it possible to convert more funds into a Roth IRA at a lower tax rate. This strategy can help create future tax-free income and can also help you avoid crossing into a higher IRMAA tier during Medicare premium calculations.

4. Enhance Long-Term Tax Efficiency

Consistent tax-loss harvesting helps smooth taxable income, reduce exposure to higher tax brackets, and integrate with broader tax-efficient withdrawal strategies. This long-term approach ensures retirees keep more of their hard-earned money working for them and may help avoid unnecessary Medicare premium surcharges tied to IRMAA thresholds.

When Tax-Loss Harvesting Makes Sense

Tax-loss harvesting isn’t limited to volatile markets, it can be applied any time you have investments with unrealized losses. It is especially useful when:

  1. You have large capital gains from selling appreciated assets.
  2. You want to rebalance your portfolio while reducing taxes.
  3. You’re in a higher tax bracket and looking to minimize taxes in retirement.
  4. You are managing taxes across taxable, tax-deferred, and tax-free accounts.

While most effective in taxable brokerage accounts, the benefits can ripple across your entire retirement income plan, influencing how and when you withdraw from IRAs, 401(k)s, and Social Security.

Avoiding the Wash-Sale Rule

A critical component of tax-loss harvesting is understanding the wash-sale rule. The IRS prevents you from claiming a loss if you repurchase the same, or substantially identical, investment within 30 days before or after the sale.

To navigate this, investors often reinvest proceeds into similar but not identical funds or ETFs. This maintains market exposure while realizing the tax benefits. Planning these transactions carefully ensures compliance and preserves your long-term investment strategy.

Combining Tax-Loss Harvesting

With Other Strategies

Tax-loss harvesting is most powerful when integrated with other tax-efficient retirement strategies such as:

  • Roth IRA conversions: Lower taxable income from harvested losses allows for larger, lower-tax-rate conversions.
  • Social Security tax planning: Coordinating withdrawals with taxable income can reduce Social Security taxation.
  • IRMAA management: Keeping your modified adjusted gross income (MAGI) below key Medicare thresholds can reduce or eliminate income-related premium surcharges.
  • Tax-efficient withdrawal strategies: Prioritizing withdrawals from taxable, tax-deferred, and tax-free accounts can maximize after-tax income.
  • Charitable giving and gifting: Harvested losses can be used strategically to support charitable contributions while reducing taxable income.

A coordinated approach can significantly improve retirement outcomes by reducing taxes, preserving wealth, minimizing IRMAA exposure, and providing more flexibility in retirement.

Partnering With a Financial Advisor

or Tax Professional

Tax-loss harvesting interacts with multiple elements of retirement planning, so working with a financial advisor is essential. They can help:

  • Ensure transactions comply with IRS rules.
  • Identify replacement investments that maintain portfolio strategy.
  • Integrate harvesting with Roth IRA conversions, Social Security planning, IRMAA management, and tax-efficient withdrawals.
  • Integrate harvesting with Roth IRA conversions, Social Security planning, and tax-efficient withdrawals.
  • Monitor tax implications year over year to maximize long-term benefits.

A financial advisor helps retirees navigate complex decisions and implement a tax-efficient retirement income plan that aligns with their goals.

Next Steps

Legacy Wealth Management, based in Manassas, Virginia, specializes in retirement income planning, tax-efficient strategies, and tax-loss harvesting for clients who are retired or about to retire. As fiduciaries, our financial advisors provide objective guidance specifically tailored for your best interest. Our mission is to help clients design a tax-efficient retirement income plan that maximizes income, lowers your taxes, manages IRMAA exposure, and protects your income for the long term.

Schedule your complimentary consultation by visiting www.lwealthmanagement.com/contact or call (877) 650-4738 to learn how tax-loss harvesting and strategic tax planning can work for your retirement goals.

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