The difference between a Roth IRA and a Traditional IRA is one of the most frequently explained concepts in personal finance. Contributions to a Traditional IRA may be tax-deductible, and withdrawals are taxed as ordinary income. Contributions to a Roth IRA are made with after-tax dollars, and qualified withdrawals are tax-free.

Most explanations stop there. And for people in the accumulation phase of their financial life, that's often enough to make a reasonable decision.

But in retirement, the question gets more nuanced. You're no longer asking which account to contribute to. You're asking which one to draw from, when, in what amount, and in what combination. Those decisions have meaningful implications for your tax bill, your Medicare premiums, the taxability of your Social Security benefit, and how long your money lasts.

This guide covers how to think about Roth vs. Traditional IRA withdrawals in retirement, the specific scenarios where each account type has the advantage, and how to coordinate them as part of a tax-smart retirement income strategy.

A Quick Recap of the Core Differences
Before getting into retirement-specific strategy, it helps to have the fundamentals clear.

Traditional IRA
Contributions may be tax-deductible depending on your income and whether you have access to a workplace retirement plan. Money grows tax-deferred. Every dollar you withdraw in retirement is taxed as ordinary income at your current rate. Traditional IRAs are subject to Required Minimum Distributions beginning at age 73 or 75, meaning the IRS will eventually require you to take withdrawals whether you need the income or not.

Roth IRA
Contributions are made with after-tax dollars and are never deductible. Money grows tax-free. Qualified withdrawals, those taken after age 59.5 and after the account has been open for at least five years, are completely tax-free. Roth IRAs have no Required Minimum Distributions during the owner's lifetime, making them one of the most flexible assets in a retirement income plan.

Traditional 401(k) and Roth 401(k)
The same basic distinction applies to workplace retirement accounts. Traditional 401(k) contributions are pre-tax and taxed on withdrawal. Roth 401(k) contributions are after-tax and withdrawn tax-free. Note that Roth 401(k)s were previously subject to RMDs, but the SECURE 2.0 Act eliminated that requirement starting in 2024, aligning them with Roth IRAs.

Why the Choice Matters More in Retirement Than It Did Before

During your working years, the Roth vs. Traditional question was primarily about whether you expected to be in a higher or lower tax bracket in retirement than you are today. If you expected to be in a lower bracket later, the Traditional IRA's upfront deduction was valuable. If you expected to be in a higher bracket, the Roth's tax-free growth was worth paying taxes now.

In retirement, the stakes change in several specific ways.

Your withdrawals affect your effective tax rate on other income.
Traditional IRA withdrawals count as ordinary income. That income affects how much of your Social Security benefit is taxable, whether you owe IRMAA Medicare surcharges, and what tax bracket you fall into for other income sources. In contrast, Roth IRA withdrawals don't count toward any of these calculations. The same dollar of income from a Roth creates significantly fewer secondary tax consequences than the same dollar from a Traditional IRA.

RMDs create mandatory income you may not need.
Once you reach RMD age, your Traditional IRA begins generating taxable income on a schedule the IRS controls, not you. Depending on your account balance, RMDs can push you into higher brackets, increase Social Security taxation, and trigger IRMAA surcharges. Because Roth IRAs have no RMDs, they give you the ability to manage your taxable income in retirement rather than having it determined for you.

California taxes all of it the same.
For Bay Area retirees, California treats both Traditional IRA withdrawals and long-term capital gains as ordinary income, with no preferential rate. This makes the federal tax distinction between Roth and Traditional withdrawals even more valuable in California, because the Roth's tax-free status extends to both federal and state taxes, while Traditional withdrawals face California's top marginal rate.

The difference compounds over a long retirement.
A 65-year-old retiree may have a 25 to 30 year retirement ahead of them. Small differences in annual tax efficiency compound significantly over that time horizon. The strategic use of Roth assets throughout a long retirement, in the right years and at the right amounts, can meaningfully affect total lifetime tax paid.

Three Scenarios Where Roth Withdrawals Have the Clear Advantage

Scenario 1: Years When Your Combined Income Would Otherwise Trigger IRMAA
IRMAA, the Income-Related Monthly Adjustment Amount, is a surcharge added to Medicare Part B and Part D premiums for higher-income beneficiaries. In 2025, the surcharges begin for individuals with modified adjusted gross income above $106,000 and for married couples above $212,000.

IRMAA is calculated based on your income from two years prior. And critically, Roth IRA withdrawals do not count toward MAGI for IRMAA purposes.

For a retiree whose income from Social Security, pensions, and Traditional IRA withdrawals is approaching an IRMAA threshold, replacing some of those Traditional IRA withdrawals with Roth withdrawals can keep total income below the threshold and avoid a significant premium surcharge. Depending on the IRMAA bracket involved, this can be worth several thousand dollars per year.

Scenario 2: Years When Additional Income Would Make More of Your Social Security Taxable
Up to 85% of your Social Security benefit can become taxable depending on your combined income, which the IRS defines as your adjusted gross income plus tax-exempt interest plus half of your Social Security benefit.

Because Roth IRA withdrawals don't count toward adjusted gross income, drawing from a Roth instead of a Traditional IRA in years where your combined income is approaching the Social Security taxation thresholds keeps more of your benefit out of the taxable category. For a retiree receiving $30,000 per year in Social Security benefits, the difference between 0% and 85% taxability is $25,500 of additional taxable income.

Scenario 3: High Income Years When You're Already in the Top Brackets
If a particular year includes unusually high income, such as a large capital gain, a business transaction, a Roth conversion, or RSU vesting in late retirement, drawing from your Roth IRA for living expenses during that year avoids stacking additional ordinary income on top of an already elevated tax bill. Roth withdrawals are invisible to the tax system in ways that Traditional IRA withdrawals simply aren't.

Three Scenarios Where Traditional IRA Withdrawals Have the Advantage

Scenario 1: Years When You Have Unusually Low Income
If a particular year has lower than normal taxable income, deliberately drawing from your Traditional IRA to fill lower tax brackets can be strategically valuable. Every dollar you withdraw at a lower rate is a dollar that won't be subject to RMDs at potentially higher rates in later years.

For example, if your taxable income in a given year leaves significant room before the top of the 12% federal bracket, withdrawing from your Traditional IRA up to that threshold converts tax-deferred dollars to after-tax dollars at a favorable rate. This is essentially a partial Roth conversion in reverse, accomplished through strategic withdrawal rather than formal conversion.

Scenario 2: When RMDs Are Required
Once you reach RMD age, you're required to take a minimum distribution from your Traditional IRA regardless of whether you need the income. In years when your RMD is required, it makes sense to use that withdrawal as part of your income strategy rather than drawing additional funds from Roth accounts unnecessarily. Let the RMD serve its purpose, and supplement with Roth funds only when doing so serves a specific tax purpose.

Scenario 3: When You Plan to Give Appreciated IRA Assets to Charity
Qualified Charitable Distributions allow individuals 70.5 and older to transfer up to $108,000 directly from a Traditional IRA to a qualified charity. The distribution counts toward your RMD but is excluded from your taxable income entirely. If charitable giving is part of your retirement plan, Traditional IRA assets can be given away tax-free through QCDs in a way that Roth assets cannot match.

The Power of Having Both: Strategic Combination Withdrawals
Most retirees don't face a binary choice between Roth and Traditional. They have both, which gives them the ability to manage their taxable income precisely each year.

In a given year, a retiree might take their required minimum distribution from their Traditional IRA, use that income to cover some essential expenses, and then supplement with Roth IRA withdrawals to cover the remainder of their expenses without pushing total income into a higher bracket or above an IRMAA threshold.

This kind of annual income optimization, sometimes called tax bracket management or bracket filling, is one of the most consistently valuable strategies in retirement planning. It requires looking at all income sources together, including Social Security, pensions, investment income, and distributions from both account types, and making intentional decisions about the mix each year.

The households that do this well consistently pay less in lifetime taxes than households with identical account balances that simply draw from accounts without a strategy.

Roth Conversions: Creating More Flexibility Before RetirementIf you're approaching retirement and most of your savings are in Traditional IRA or 401(k) accounts, Roth conversions can be a powerful way to create more of this flexibility before RMDs begin.

A Roth conversion moves money from a Traditional IRA into a Roth IRA. You pay ordinary income tax on the converted amount in the year of conversion. In exchange, that money grows and is withdrawn tax-free going forward, and it's no longer subject to RMDs.

The ideal window for Roth conversions is often the period between retirement and RMD age. During these years, your earned income has stopped but RMDs haven't begun, creating a window where your taxable income may be temporarily lower than it was during your working years and lower than it will be once RMDs kick in. Converting in this window allows you to pay taxes at a potentially more favorable rate and reduce the future RMD burden.

Roth conversions require careful planning. Each conversion increases your taxable income in the year it occurs, which can affect IRMAA, Social Security taxation, and your overall tax bracket. The right amount to convert in any given year requires modeling the full income picture, not just the conversion itself.

What Silicon Valley Retirees Should Know Specifically
For Bay Area retirees, a few factors make the Roth vs. Traditional question especially consequential.

High income during working years often means large tax-deferred balances. Decades of high earnings and maxed retirement account contributions mean many Silicon Valley retirees arrive at retirement with substantial Traditional IRA and 401(k) balances. Large tax-deferred balances mean large future RMDs, which can create significant tax complications beginning at age 73 or 75 if not addressed in advance.

Equity compensation can create years of elevated income. For retirees who receive RSU vesting events, stock option exercises, or other equity compensation events in early retirement, those high-income years are precisely when Roth withdrawals for living expenses provide the most value, avoiding additional ordinary income on top of an already elevated base.

California's treatment of all income as ordinary makes Roth assets more valuable. The federal advantage of Roth withdrawals is magnified in California because the state provides no preferential rate for any form of retirement income. Every dollar you can receive tax-free rather than as ordinary income avoids both federal and California income tax simultaneously.

IRMAA thresholds are reached more easily at Bay Area income levels. The income thresholds that trigger IRMAA Medicare surcharges are not adjusted for regional cost of living. A retiree in San Jose with the same income as a retiree in a lower-cost state faces identical IRMAA exposure. For many Bay Area retirees, managing income to stay below IRMAA thresholds through strategic Roth withdrawals is a meaningful annual planning exercise.

A Practical Framework for Deciding Each Year
Rather than a blanket rule about which account to use, the most effective approach is to make the decision intentionally each year based on your projected income picture.

Start by projecting your baseline taxable income for the year. Include Social Security, pension income, required minimum distributions if applicable, and any other predictable income sources.

Then identify where that income lands relative to key thresholds. What federal tax bracket are you in? Are you approaching an IRMAA threshold? Are you near the Social Security combined income thresholds?

From there, make intentional decisions about supplemental withdrawals. If you need additional income beyond your baseline sources, consider whether drawing from Traditional IRA pushes you into a higher bracket or above a key threshold. If so, Roth withdrawals may be the better choice for that incremental income, even if Traditional IRA withdrawals would otherwise be the default.

This annual review is not complicated, but it does require looking at the full income picture simultaneously rather than drawing from accounts in isolation.

Working With a Financial Advisor on IRA Withdrawal Strategy in San Jose
Roth vs. Traditional IRA strategy in retirement is one of the most consistently valuable planning conversations we have with clients. It doesn't require large changes to your investment strategy. It requires intentional, coordinated decisions about which accounts to use each year and why.

At True North Advisors, we help individuals and families throughout San Jose, Sunnyvale, Cupertino, Mountain View, Palo Alto, Santa Clara, Los Gatos, and Saratoga build retirement income strategies that coordinate Roth and Traditional IRA withdrawals as part of a comprehensive approach to tax-efficient retirement income planning.

We work in close coordination with your CPA to ensure that income planning and tax planning are aligned.

Ready to build a more tax-efficient retirement income strategy? Schedule a Free Consultation or call us at (408) 573.1822.

Frequently Asked Questions

Should I withdraw from my Roth IRA or Traditional IRA first in retirement? There is no universal answer. The most tax-efficient approach for most retirees is to draw from Traditional IRA accounts strategically to fill lower tax brackets while preserving Roth assets for years when additional income would push you into a higher bracket, trigger IRMAA surcharges, or increase the taxability of your Social Security benefit. The right sequence depends on your specific income sources, account balances, and tax picture each year.

Do Roth IRA withdrawals count toward Social Security taxation? No. Roth IRA withdrawals are not included in the combined income calculation that determines how much of your Social Security benefit is taxable. This makes Roth withdrawals particularly valuable in years when your other income is approaching the combined income thresholds.

Do Roth IRA withdrawals affect Medicare premiums? No. Roth IRA withdrawals are not included in modified adjusted gross income for IRMAA purposes. Drawing from a Roth instead of a Traditional IRA can help keep your income below IRMAA thresholds and avoid Medicare premium surcharges.

Is it better to do Roth conversions before or after retirement? Both have merit depending on the situation. The years between retirement and RMD age often represent an ideal conversion window because income is temporarily lower than during working years and lower than it will be once RMDs begin. Conversions during this window allow you to pay tax at a potentially lower rate and reduce future RMD obligations.

Are Roth IRAs taxed in California? Qualified Roth IRA withdrawals are not subject to California income tax. California conforms to the federal treatment of Roth IRA withdrawals, meaning tax-free at the federal level also means tax-free at the state level. This makes Roth assets particularly valuable for California retirees given the state's high ordinary income tax rates.

What happens to a Roth IRA when I die? Roth IRAs can be passed to beneficiaries, who generally must withdraw the funds within 10 years under the SECURE 2.0 Act rules for non-spouse beneficiaries. Importantly, withdrawals by beneficiaries from an inherited Roth IRA are also tax-free, making Roth accounts highly efficient for legacy planning.

What is the five-year rule for Roth IRA withdrawals? To take qualified tax-free withdrawals from a Roth IRA, the account must have been open for at least five years and you must be at least 59.5 years old. If you open a new Roth IRA through a conversion later in life, a separate five-year clock applies to that converted amount for purposes of avoiding the 10% early withdrawal penalty, though the tax-free nature of qualified withdrawals is unaffected after age 59.5.

This content is for educational purposes only and does not constitute tax or legal advice. Tax rules are subject to change. Please consult a qualified tax professional regarding your individual situation.

Sources:

IRMAA Thresholds (2025)
Centers for Medicare and Medicaid Services. "2025 Medicare Parts B and D IRMAA Amounts." cms.gov.
Kiplinger. "Medicare Premiums 2025: IRMAA Brackets and Surcharges for Parts B and D." kiplinger.com.

Social Security Taxation Thresholds
Internal Revenue Service. "Are My Social Security or Railroad Retirement Tier I Benefits Taxable?" irs.gov/pub/irs-pdf/p915.pdf.
Kiplinger. "How to Calculate Taxes on Social Security Benefits in 2025." kiplinger.com.

Qualified Charitable Distributions (2025 limit)
IRA Help / Ed Slott. "New Reporting for 2025 QCDs." irahelp.com.
Mission Wealth. "What are Qualified Charitable Distributions?" missionwealth.com.
Note: The 2025 limit is $108,000, up from $105,000 in 2024. The document should be updated accordingly.

California Income Tax Rates
California Franchise Tax Board. "2025 California Tax Rate Schedules." ftb.ca.gov.
TaxAct. "California Income Tax Rates 2025." blog.taxact.com.
Note: The 13.3% top marginal rate applies to income tax. For wage earners, an additional SDI payroll tax applies, bringing the effective top rate to 14.4% on wages. For retirement income such as IRA withdrawals, the 13.3% income tax rate is the applicable figure.

Roth 401(k) RMD Elimination
SECURE 2.0 Act of 2022, Section 325. Effective January 1, 2024.
IRS Notice 2024-2. Guidance on SECURE 2.0 provisions.

ISO Holding Period Requirements
Internal Revenue Code Section 422. "Incentive Stock Options."
IRS Publication 525. "Taxable and Nontaxable Income."

Social Security Combined Income Formula
Internal Revenue Code Section 86.
IRS Publication 915. "Social Security and Equivalent Railroad Retirement Benefits."

Roth IRA Five-Year Rule
Internal Revenue Code Section 408A.
IRS Publication 590-B. "Distributions from Individual Retirement Arrangements (IRAs)."

SECURE 2.0 Act: Inherited IRA Ten-Year Rule
SECURE Act of 2019, Section 401.
IRS Proposed Regulations on Required Minimum Distributions (February 2022).