For years I assumed Roth conversions were a strategy for wealthy people trying to dodge future estate taxes — something for a different tax bracket than mine. Now that I’m actually retired and looking at my own accounts, I understand why that assumption was backwards. Roth conversions are arguably most valuable for exactly the situation a lot of new retirees find themselves in: a window of unusually *low* taxable income, sitting between a full-time paycheck and the start of Social Security and RMDs.
Here’s the mechanic in plain terms. A Roth conversion means moving money from a traditional IRA (or similar pre-tax account) into a Roth IRA. You pay ordinary income tax on the converted amount in the year you convert — there’s no way around that part — but once it’s in the Roth, it grows tax-free and can be withdrawn tax-free in retirement, with no RMDs during your lifetime. You’re essentially choosing to pay tax on the money now, at today’s rate, in exchange for never owing tax on it — or its future growth — again.
The reason this matters more in early retirement than while working is the size of the tax bill you’re choosing to trigger. Convert while you’re in the 32% bracket during your working years, and you’re paying a steep price to move that money. Convert during a year where your only income is modest and you haven’t started Social Security or RMDs yet, and you might be able to convert a meaningful chunk while staying in the 12% or 22% bracket instead — the exact same dollars, converted at a fraction of the tax cost, simply because of *when* you did it.
I’m currently in exactly that window. My paycheck stopped in August. My Social Security doesn’t start until October, and even once it does, it’s a fraction of what my full working income was. Between now and whenever RMDs or a larger income stream kick back in, I have several years where my taxable income is naturally lower than it’s been in decades — and lower than it’s likely to be again once RMDs start pushing money out of my accounts whether I want it or not.
A few things I’ve learned that aren’t obvious from a quick explanation:
The tax is due in the year of conversion, and it has to be paid from funds outside the IRA if you want the conversion to actually work in your favor — paying the tax out of the converted amount itself just shrinks how much actually lands in the Roth, and if you’re under 59½, that withheld portion can even trigger a separate early withdrawal penalty on top of the income tax.
Conversions are irreversible. The “recharacterization” option that used to let you undo a conversion was eliminated by the Tax Cuts and Jobs Act back in 2018. Once you convert, that decision is final for that tax year, which means getting the amount right matters more than it used to.
A five-year clock starts on each conversion for penalty-free withdrawal of the converted principal if you’re under 59½ (a separate five-year rule applies to earnings and to your very first Roth account generally). At my age this is less of a live concern, but it’s a real trap for anyone converting earlier in life and assuming Roth funds are always penalty-free to touch.
The strategy of doing this deliberately, year by year, in calculated amounts rather than all at once, is usually called a Roth conversion ladder — and that’s exactly what I’m building for myself, which I’ll walk through in the next post.
One complication I had to research before converting anything: the pro-rata rule, which applies if you have any after-tax (non-deductible) contributions mixed into a traditional IRA alongside pre-tax money. The IRS doesn’t let you cherry-pick the after-tax portion to convert tax-free while leaving the pre-tax portion behind — any conversion is treated as coming proportionally from both pre-tax and after-tax dollars across all your traditional IRAs combined, based on IRS Form 8606 tracking. If you’ve ever made a non-deductible IRA contribution, or rolled over an account with an after-tax component, this rule directly affects how much of a given conversion is actually taxable, and it’s a detail that’s easy to get wrong without pulling your actual Form 8606 history first.
I’m not a tax advisor. Roth conversion decisions depend heavily on your specific tax situation, and mistakes here are costly and irreversible — talk to a CPA before converting any meaningful amount.
Frequently Asked Questions
What is a Roth conversion?
It’s moving money from a traditional IRA into a Roth IRA, paying ordinary income tax on the converted amount now in exchange for tax-free growth and tax-free withdrawals later, with no lifetime RMDs.
Why convert to a Roth IRA in early retirement instead of while working?
Early retirement often creates a window of unusually low taxable income before Social Security and RMDs begin, letting you convert at a lower tax rate than you’d pay during working years or once RMDs push you into a higher bracket.
Can I undo a Roth conversion if I change my mind?
No — the option to reverse a conversion (recharacterization) was eliminated by the Tax Cuts and Jobs Act in 2018, so conversions are final for that tax year.
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