Retirement Tax Planning Guide: Save More

Retirement tax planning in 2026 focuses on managing multiple income streams to minimize your lifetime tax burden. By strategically ordering withdrawals from taxable, tax-deferred, and Roth accounts, you can stay in lower tax brackets. Key actions include converting traditional IRA funds to Roth during low-income years and utilizing qualified charitable distributions to satisfy required minimum distributions without increasing taxable income.

Why does your tax landscape change in retirement?

Many retirees assume that taxes disappear when they stop working, but in fact, the complexity often increases. During your working years, your employer handled withholding, and your income source was singular. In retirement, your income typically comes from Social Security benefits, pension payments, IRA and 401(k) withdrawals, and investment income. Each source has a different tax treatment, and their interaction can push you into higher marginal tax brackets or trigger Medicare surcharges.

The goal is not just to pay taxes, but to manage your effective tax rate. According to Fidelity research, families should plan for savings and pensions to replace about 45% of pre-retirement income, with the remainder covered by Social Security. To achieve this tax efficiency, you must treat your financial plan as a dynamic entity that requires annual review, not a one-time setup.

What is the difference between marginal and effective tax rates?

Understanding this distinction is the first step in optimization. Your marginal rate is the tax applied to your next dollar of income. Your effective rate is the average tax paid on all your income. Strategic planning often involves keeping your marginal rate low by controlling how much you withdraw in a given year, while also monitoring your effective rate to ensure you are not paying more than necessary across your portfolio.

How should you order your withdrawals to save money?

The sequence of withdrawals significantly impacts your total tax bill. A common mistake is to withdraw everything from one account type, potentially triggering high capital gains taxes or pushing you into a higher bracket. Instead, consider a bucket approach or proportional withdrawal strategy.

• Taxable Accounts First: Withdraw from taxable brokerage accounts to take advantage of lower long-term capital gains rates. In 2026, the 0% capital gains rate applies to specific income thresholds; for single filers, total realized gains must generally stay below $51,850 to avoid this tax, assuming other income is minimal.
• Tax-Deferred Accounts Second: Traditional IRA and 401(k) withdrawals are taxed as ordinary income. Draw from these in years when your other income is low to utilize lower tax brackets.
• Roth Accounts Last: Roth withdrawals are tax-free. Save these for years when your income is high or for estate planning purposes, as they do not trigger RMDs during your lifetime.

Fidelity recommends performing a cash flow analysis to estimate annual income. In low-income years, it is often tax-efficient to withdraw more from tax-deferred accounts. In high-income years, lean on tax-exempt sources like Roth IRAs to avoid spiking your tax liability.

When is the best time to perform a Roth conversion?

Roth conversions allow you to move money from a traditional IRA to a Roth IRA, paying taxes now on the converted amount. This is most effective during "notch years"—periods of low income such as early retirement or between jobs. By converting funds while your income is low, you lock in tax-free growth and reduce the amount of taxable income you face later when Required Minimum Distributions (RMDs) begin.

How do Required Minimum Distributions (RMDs) affect your taxes?

For individuals born in 1960 or later, the IRS requires RMDs to begin by age 75. These distributions are taxed as ordinary income and can increase your provisional income, potentially making more of your Social Security benefits taxable. To mitigate this, consider the following strategies:

• Qualified Charitable Distributions (QCDs): If you do not need the RMD income, you can donate it directly to a charity. This satisfies the RMD requirement and excludes the amount from your taxable income. The 2026 limit for tax-exempt QCDs is $111,000 for an individual.
• Pre-RMD Conversions: Convert a portion of your traditional IRA to Roth before you reach age 75. This reduces the size of the taxable balance that will generate RMDs in the future.

How does IRMAA impact your Medicare premiums?

Income-Related Monthly Adjustment Amounts (IRMAA) are surcharges on Medicare Part B and Part D premiums based on your modified adjusted gross income (MAGI). If your investments generate high income or you take large withdrawals in a single year, you may face higher premiums. Planning your withdrawal amounts to stay below IRMAA thresholds can result in significant savings on health care costs in 2026.

What checklist should you follow for annual tax planning?

Do not wait until tax season to assess your strategy. Following this checklist ensures you remain compliant and optimized throughout the year:

• Assess Current Income: List all income sources including Social Security, pensions, and investment dividends to determine your provisional income level.
• Review Account Balances: Compare your traditional, Roth, and taxable account values to identify opportunities for tax-loss harvesting.
• Evaluate Conversion Opportunities: Determine if converting a small portion of your traditional IRA to Roth would keep you within a lower tax bracket.
• Plan for RMDs: Calculate your RMD for the year and decide whether to take it as a lump sum or installments to manage income smoothing.
• Coordinate with Social Security: Check if delaying your Social Security claim or coordinating your withdrawal timing would reduce the taxable portion of your benefits.

Frequently Asked Questions

Are Roth IRA withdrawals taxable in retirement?

Generally, no. Qualified Roth IRA withdrawals are tax-free after you have held the account for five years and you are at least 59½ years old or have been taking RMDs. This makes Roth accounts a powerful tool for tax diversification in your later years.

Can I avoid paying taxes on my RMD?

Yes, if you donate your RMD to a qualified charity as a Qualified Charitable Distribution. The amount is not included in your taxable income, and it counts toward your RMD requirement. This is an effective way to support charitable goals while reducing your tax liability.

How much of my Social Security is taxable?

It depends on your provisional income. For a single filer in 2026, up to 50% of benefits may be taxable if provisional income is between $25,000 and $34,000, and up to 85% if it exceeds $34,000. Marital filing status has different thresholds, so coordinating your withdrawals can help keep your provisional income below these limits.

Should I withdraw from my 401(k) or IRA first?

It depends on your specific tax bracket and state of residence. Generally, it is beneficial to use the account with the highest tax efficiency for your current income level. In many cases, withdrawing from a taxable account first to use capital gains rates is more efficient than withdrawing from a traditional IRA, which is taxed at ordinary income rates.