Tax-Efficient Retirement Strategy

Almost every retirement plan comes down to three kinds of accounts, each taxed differently. Understanding the three buckets is the foundation for everything else, because the whole game is deciding which bucket to spend from and when.

• Taxable. A regular brokerage account. You already paid tax on the money going in. Dividends and realized capital gains are taxed each year, but long-term gains get preferential rates (0, 15, or 20 percent) and you control the timing of when you sell.
• Tax-deferred. Traditional IRAs and 401(k)s. Contributions were usually pre-tax, the money grows tax-deferred, and every dollar you withdraw is taxed as ordinary income. These accounts carry required minimum distributions later.
• Tax-free (Roth). Roth IRAs and Roth 401(k)s. You funded them with after-tax dollars, and qualified withdrawals, including all the growth, come out tax-free. For how a Roth works, see Roth IRA explained, and for the choice between pre-tax and Roth, see Roth IRA vs 401(k).

Having money spread across all three buckets is often called tax diversification, because it gives you levers to pull each year rather than being forced to realize a large taxable withdrawal at a bad time.

A widely cited default is to spend accounts in this sequence: taxable first, then tax-deferred, then Roth last. The logic is that Roth money grows tax-free, so you want it compounding as long as possible, while taxable accounts are already taxed on their earnings each year and are the natural first source. Draining the taxable account first also lets more of your gains qualify for lower long-term capital-gains rates.

The nuance is that a strict order is rarely optimal. A few reasons people deviate:

• Filling low brackets. In early retirement your income may be low, leaving room in the lower tax brackets. Taking some tax-deferred money (or converting it) in those years can be cheaper than being forced to take large taxable RMDs later.
• Capital-gains management. If your taxable income is low enough, some long-term capital gains can be taxed at 0 percent. Realizing gains deliberately in those years can be worth more than leaving the taxable account untouched.
• Blending sources. Many retirees pull a little from more than one bucket each year to smooth their taxable income, rather than fully emptying one before touching the next.
• Leaving Roth to heirs. Roth accounts pass to heirs tax-free, so estate goals can affect the order too.

In other words, the taxable-then-tax-deferred-then-Roth sequence is a reasonable starting frame, not a prescription. The right mix is a tax calculation specific to you.

Tax-deferred accounts cannot grow untaxed forever. Required minimum distributions force you to start withdrawing a minimum amount each year, and those withdrawals are taxed as ordinary income. Under the SECURE 2.0 law, RMDs now begin at age 73, and the starting age rises to 75 in 2033.

• What has RMDs. Traditional IRAs, 401(k)s, 403(b)s, and similar pre-tax accounts. The amount is based on your account balance and an IRS life-expectancy factor.
• What does not. Roth IRAs have no RMDs during the original owner's lifetime, and since 2024 Roth 401(k)s no longer have lifetime RMDs either. This is one reason Roth balances are often spent last.
• The penalty. Missing an RMD used to cost 50 percent of the shortfall. SECURE 2.0 cut that to 25 percent, or 10 percent if you correct it promptly.
• Qualified charitable distributions. From age 70 and a half, you can send IRA money directly to charity as a QCD that counts toward your RMD but is excluded from taxable income.

The reason RMDs matter for planning is that a large tax-deferred balance can produce big forced withdrawals in your 70s, potentially pushing you into a higher bracket, raising the taxable portion of Social Security, and triggering Medicare IRMAA surcharges. Managing that risk is why the years before RMDs begin are so valuable. For a deeper walkthrough, see what is an RMD.

The gap between when you stop working and when Social Security and RMDs arrive is often the lowest-income stretch of your life. That is precisely when a Roth conversion can be most valuable. A conversion moves money from a tax-deferred account into a Roth, you pay ordinary income tax on the converted amount now, and it then grows and is withdrawn tax-free.

The strategy in retirement is usually to convert just enough each year to fill up a lower tax bracket without spilling into the next one. Done across several of these low-income years, conversions can:

• Move money to the tax-free bucket while your rate is low.
• Shrink the tax-deferred balance, which lowers future RMDs and the forced income they create.
• Reduce the taxable portion of future Social Security and the risk of IRMAA surcharges later.

The trade-offs are real: a conversion is permanent, it adds to this year's income, and a large one can raise Medicare premiums two years later. It is a tax decision, not just an investing one, so the amount is worth planning carefully. Our Roth IRA conversion guide covers the mechanics, the pro-rata rule, and the 5-year rule in detail.

Asset location is a quieter lever than withdrawal order, but it compounds over decades. It is the practice of placing each investment in the account where it is taxed most gently. It is different from asset allocation, which is your overall mix of stocks and bonds; location is about where those holdings sit.

• Tax-inefficient assets in sheltered accounts. Bonds and bond funds, high-yield dividend funds, and REITs throw off ordinary income every year. Holding them inside a tax-deferred or Roth account avoids that annual tax drag.
• Tax-efficient assets in taxable accounts. Broad stock index funds and ETFs are naturally tax-efficient (low turnover, mostly long-term gains you control), so they fit well in a taxable brokerage account.
• Highest-growth assets in the Roth. Because Roth growth is never taxed, some people place their highest-expected-growth holdings there so the tax-free bucket does the most compounding.

Asset location is a general framework, not a rule, and it interacts with your bracket, your account sizes, and your goals. For the broader principles behind it, including tax-loss harvesting and holding periods, see tax-efficient investing. If part of your plan is generating income, our guide to the best ETFs for retirement income walks through the fund types and where they tend to be held.

Deciding which account to draw from, whether to convert, and how to manage RMDs are tax decisions made with a professional and executed at your broker or IRA custodian. Walnut does not do that and does not give tax advice. Where Walnut is useful is the investing side: you can connect any major US broker and see how the holdings inside your retirement and taxable accounts are doing, chat through Claude, ChatGPT, or built-in AI to talk through asset location or how a basket is allocated, build thematic baskets, and place trades you approve yourself. Access is read-only by default until you choose to trade. Walnut is not an investment adviser or a tax adviser and does not tell you what to buy, which account to spend from, or whether to convert.