A 62-Year-Old Wants $3,900 a Month Tax-Free From a $900,000 401(k). Getting There Comes With a Tax Bill

A 62-year-old with $900,000 in her 401(k) knows the retirement she wants: $3,900 a month in tax-free Roth withdrawals starting at age 70. That comes to $46,800 a year. The problem is that every dollar in her account today is pretax. The tax-free income she is counting on does not exist yet.

Her situation is hypothetical, and the $3,900 is a retirement income goal with neither a fund nor annuity promising payment. Before she can collect tax-free income, she has to pay tax.

She Has to Build the Roth Before It Can Pay Her

Pretax 401(k) savings become Roth money through a conversion, and those are taxable. IRS Publication 17, the agency’s general guide to individual income tax, says converted amounts are included in gross income in the year of the conversion, even though the move counts as a rollover for Roth purposes. The Roth IRA section of the tax code backs that up and waives the 10% early-distribution tax on the converted money.

Roth IRA contributions have an annual cap, but conversions do not. She can convert inside her 401(k) if the plan allows it, or roll eligible money into a Roth IRA, directly or through a traditional IRA. Her ability to move money out of the 401(k) depends on the plan’s distribution rules. Either way, each conversion adds to her taxable income, making the amount a choice about how much tax she can absorb that year.

Between now and age 70, she has two separate bills to cover: what she lives on, and the tax on each conversion. If both come out of the 401(k), the money she pulls for living costs is taxable too, and it competes with her conversions for the same space on her tax return. If she uses part of her 401(k) savings to pay the conversion tax, less ends up in her Roth. Paying that tax from savings outside the 401(k) leaves more money growing in the Roth.

The tax hit goes beyond her bracket. Higher income can make more of her Social Security taxable once she claims. Medicare generally uses tax returns from two years earlier to calculate premium surcharges. A conversion at 63 could raise her Medicare costs at 65, while one at 62 generally would not affect her first year of coverage. Each year’s conversion should account for those costs.

Why Tax-Free Income Can Still Run Out

Her annual target equals 5.2% of her current balance. Conversion taxes and years of living costs can shrink that pool. If only $700,000 ends up in the Roth, the same $46,800 a year becomes 6.7% of the balance.

Either rate can fall short over a lifetime. Factors like investment returns, inflation and how long she lives will decide whether the withdrawals hold up. The Roth label determines who keeps each withdrawal. Her spending and her returns determine how long the money lasts.

One structural advantage helps later in retirement. According to the IRS, neither Roth IRAs nor Roth 401(k)s require withdrawals while the account holder is alive. Her traditional 401(k), by contrast, generally requires minimum distributions starting at age 75. In a weak market, she can reduce optional Roth withdrawals without a mandatory payout forcing her hand.

Start the Five-Year Clock This Year

By 70, she will be well past the age test. IRS Publication 590-B, the agency’s guide to IRA distributions, treats Roth IRA withdrawals as qualified on or after age 59 and a half, provided a five-year period has passed. That period starts with the first tax year a contribution was made to any Roth IRA set up for her. A first Roth IRA funded by a conversion at 62 would usually clear it well before 70.

Keep the clocks separate. Under the tax code’s rules for Roth 401(k) accounts, the five-year period for a designated Roth account runs from the first designated Roth contribution to that plan. If she converts inside the 401(k), that starts the plan’s clock. It does nothing for a Roth IRA she opens later.

Price the Conversions and the Withdrawals Together

1. Start the right Roth clock. If her 401(k) permits a rollover to a Roth IRA, even a small taxable transfer this year starts the Roth IRA’s five-year period. An in-plan Roth conversion starts the plan’s clock instead. If a rollover isn’t available, an eligible regular Roth IRA contribution can also start the IRA clock.
2. Map out conversions year by year. Size each one to the taxable income she can take on, and run it alongside her Social Security claiming age and Medicare enrollment so the follow-on costs are counted up front.
3. Base the target on the Roth she will actually have. If her projections point toward $700,000 rather than $900,000, decide now whether to accept the higher withdrawal rate, lower the $3,900 goal, or lean more on Social Security.

At 62, her real decision is how much tax she will pay over the next several years in exchange for tax-free control at 70. Depending on when she stops working, the years before required withdrawals begin at 75 could offer her best conversion window, and we sized up that opportunity in a free Roth guide. The sooner she puts a number on it, the more years she has to spread the cost.

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