Should I Roth Convert Before RMDs?

Why would anyone volunteer to pay tax sooner than the law requires? Because the alternative is letting the IRS decide the timing for you, at a rate you don’t control, in years you can’t pick. That’s the trade a Roth conversion makes: pay tax now on your terms, or pay it later on theirs.

The window nobody tells you about

There’s a quiet stretch in a lot of retirements that I think of as the most valuable tax real estate you’ll ever own. You’ve stopped working, so the paychecks are gone. You haven’t started Social Security yet, or you’re taking only a little. And required minimum distributions, the slice of your tax-deferred accounts the IRS forces you to withdraw, don’t begin until 73 or 75 depending on your birth year.

For maybe five to ten years, your taxable income can sit unusually low. That’s the window. You can pull money out of a traditional IRA, pay tax on it at today’s modest rates, and move it into a Roth where it grows tax-free and never gets an RMD as long as you live. Most people spend that decade doing nothing, proud of their low tax bill, never realizing they’re sitting on a discount with an expiration date.

What you’re really defusing

A big traditional IRA is a tax bomb with a timer. It compounds untaxed for decades, and the day RMDs start, the IRS begins collecting. The balance keeps growing, the withdrawal factor shrinks every year, and the forced income climbs right when you least want it.

That’s the second-order hit people miss. A fat RMD doesn’t just get taxed. It stacks on top of your Social Security and can shove more of that benefit into taxable territory, and it can trip IRMAA, the income-based surcharge that raises your Medicare premiums two years later. One forced withdrawal, three separate bills. Converting earlier shrinks the balance that gets divided later, which shrinks every one of those downstream hits. The smart play is filling up the lower brackets on purpose, which is the whole art of bracket management.

Where the brakes go on

I’m absolute that the window is real and humble about how hard you should push through it, because conversions have their own traps.

The big one is IRMAA. Convert too much in a year and you can spike your income enough to raise your Medicare premiums, so the move is to convert right up to a line, not over it. Watch the cliffs. Mind the pro-rata rule if you’ve got after-tax money mixed into your IRAs, because you can’t just cherry-pick the untaxed dollars. And the case weakens if you’re charitably inclined, since money headed to charity through a Qualified Charitable Distribution leaves your IRA tax-free anyway. No point converting and taxing dollars you were going to give away.

My take

If you’ve got a seven-figure traditional IRA and a low-income decade in front of you, doing nothing is itself a decision, and usually the expensive one. The RMD is one of the few tax bills that tells you it’s coming years ahead. The conversion window is your chance to answer before it does.

Fill the brackets you’d waste otherwise. Don’t let the IRS pick the year, the rate, and the size of the bill while you sit on the cheapest tax decade of your life.