Compare spendable cash from taxable, traditional and Roth accounts. Review the whole tax year and remaining resources before choosing a withdrawal sequence.

August 24, 2026 · Financial Forte Staff

Historical article: prepared retrospectively using information available as of August 24, 2026.

Two retirement accounts with the same balance can provide different amounts to spend after taxes. A taxable investment account, a traditional IRA and a Roth IRA each have their own rules. Having money across different tax treatments can create choices, but it does not make one account universally superior or remove the need to plan withdrawals.

Think of tax diversification as flexibility over which dollars to use and when. The useful question is how a proposed withdrawal affects the household's total tax picture, spending needs and remaining resources. An account label by itself cannot answer that question.

Know what part of the withdrawal is income

A traditional IRA distribution is generally taxable except to the extent applicable basis rules exclude part of it. Nondeductible contributions require careful records and allocation across the relevant IRA balances; you cannot necessarily select only the after-tax dollars from one IRA and ignore the rest.[1]

In a taxable investment account, selling an asset generally creates a gain or loss based on proceeds and adjusted basis. The entire sale amount is not automatically taxable income. Holding period, other gains and losses, income level and the type of investment can affect the tax treatment.[2]

A qualified Roth IRA distribution is federally tax-free. Qualification involves the applicable five-year requirement and an eligible condition, such as attaining age 59½. Nonqualified distributions have ordering and potential additional-tax rules, and conversions introduce further considerations. “Roth” should not be treated as permission to ignore age, timing or the history of the account.[1]

Compare spendable amounts under stated assumptions

Martin is a hypothetical retiree comparing $20,000 withdrawals from three sources. To isolate the mechanics, assume every dollar of the traditional IRA withdrawal is taxable at a simplified 20% federal rate. Assume a taxable-account sale has $16,000 of basis and $4,000 of long-term gain taxed at 15%. Assume the Roth distribution is qualified.

The $20,000 traditional IRA withdrawal produces $4,000 of assumed federal tax and $16,000 to spend. The $20,000 taxable sale produces $600 of assumed tax on the $4,000 gain, leaving $19,400. The $20,000 qualified Roth distribution leaves $20,000 after federal income tax in this simplified comparison.

Those figures are not a calculation of Martin's actual tax return. They exclude state taxes, deductions, benefit interactions and any additional taxes. The 20% assumption is a teaching rate, not a federal tax bracket recommendation. Actual taxes may change across portions of a withdrawal and depend on the rest of the household's income.

Suppose Martin instead wants $20,000 to spend and chooses a mix under the same assumptions. A $12,500 traditional IRA withdrawal would produce $2,500 of assumed tax and $10,000 to spend. Adding a $10,000 qualified Roth withdrawal would reach the $20,000 spending goal, using $22,500 of total account withdrawals ($12,500 plus $10,000).

That combination uses less Roth money than taking the entire spending amount from Roth, but more total assets than a $20,000 qualified Roth withdrawal. It also creates taxable income. Whether that is worthwhile depends on current and future circumstances, not just the fact that the arithmetic works.

Evaluate the whole year's income

A withdrawal decision can interact with Social Security taxation, deductions and later Medicare premiums. A dollar of additional taxable income does not always have an isolated effect equal to one marginal bracket. Review the combined projection before deciding that an apparently low-tax withdrawal has no other consequences.[3]

For example, the temporary federal senior deduction available under the 2025 law has income-based limits and specific eligibility requirements. It does not make Social Security universally tax-free, and it does not reduce every income measure used elsewhere. A plan should identify the relevant income definition rather than assume all deductions lower Medicare's income calculation.[4]

Required minimum distributions can also constrain the sequence. An amount that must be distributed cannot simply be skipped because the household prefers to spend Roth assets that year. Confirm which accounts have a requirement, the applicable calculation and the deadline. A required distribution is not itself eligible for rollover into another retirement account.[1]

Look ahead as well. Preserving tax-deferred assets today may lead to larger taxable distributions later, while using Roth assets now reduces the tax-free resources available for future needs or beneficiaries. Future tax law and personal circumstances are uncertain, so compare scenarios rather than assuming one rate path is guaranteed.

Choose a sequence that fits the purpose

The best source for an emergency repair may differ from the best source for routine retirement income or a large planned gift. Near-term liquidity, investment allocation and transaction costs belong alongside taxes. Avoid realizing an unwanted investment loss or disrupting the portfolio solely to follow a rigid account-order rule.

If a Roth conversion is being considered, separate that decision from the withdrawal needed for spending. A conversion can create current taxable income and may require cash to pay the resulting tax. Compare the amount converted, the funding source for taxes and the time available to benefit from the change. It is not a free transfer between account labels.[5]

Reconcile the records with account statements and prior tax filings. Keep records of taxable-account basis, nondeductible IRA contributions and Roth history. Incomplete records can make a theoretically flexible plan harder to execute correctly. Coordinate proposed transactions with the adviser and tax preparer before the year is nearly over, with time to revise withholding or estimated payments if needed.

For the next planned withdrawal, ask for a comparison of at least two available sources showing gross proceeds, estimated tax, spendable cash and the effect on the remaining accounts. That turns tax diversification into an actual decision and helps the household use its flexibility deliberately.

Related reading

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Educational information, not personalized investment, tax, legal or benefits advice. Examples use hypothetical assumptions. Verify current rules and your circumstances before acting.

Sources

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