Roth IRA Conversions

Do They Make Sense? The Answer May Surprise You

Converting a traditional tax-deferred IRA to a Roth IRA is simple in concept: once converted, the money grows tax-free and comes out tax-free. Income taxes are due on all of the money in the IRA at the time of conversion. If you convert before age 59½, the usual 10% early-withdrawal penalty is waived, so long as you wait 5 years before taking money out of the new Roth IRA and are over 59½ when you do.

Should you convert? It depends on more variables than you'd expect — which is why I use proprietary software to run the actual numbers for your specific situation rather than rely on a rule of thumb. As a general statement, though: if you'll be in the same or a lower tax bracket in retirement, converting to a Roth IRA is unlikely to make economic sense.

The Variable That Matters More Than Your Tax Bracket

A key factor is where the money to pay the conversion tax comes from. If you plan to pay that tax bill out of the IRA itself, conversion makes far less sense — you're shrinking the very balance that was supposed to grow tax-free, on top of paying tax on money you never actually got to keep. If you can pay the tax from other, non-IRA funds (so the full converted balance stays invested and growing tax-free), the math looks considerably better.

The other major factor is direction: if your income tax bracket is likely to be higher in retirement than it is today, the case for converting now gets stronger. The earlier in life you convert, the more years that money has to compound tax-free — which is why younger clients converting ahead of an expected future bracket increase tend to see the largest relative benefit.

Situations Where Conversion Tends to Make More Sense

While every case runs through the actual numbers rather than a checklist, a few patterns come up often enough to be worth mentioning:

• A lower-income year — a gap between jobs, a year of reduced business income, or the early years of retirement before Social Security and pension income begin — can put you in a temporarily lower bracket, making that year a better window to convert a portion of your IRA.
• Expecting future tax rates to rise, either because your own income is likely to grow or because you expect broader tax law changes.
• Wanting to reduce future Required Minimum Distributions, which can otherwise push you into a higher bracket later or trigger IRMAA surcharges on Medicare premiums — see the Medicare page for how those two issues connect.
• Leaving a more tax-efficient inheritance to heirs, since Roth funds generally pass to beneficiaries without the income tax burden a traditional IRA carries.

Situations Where It Often Doesn't

Conversion tends to make less sense when you expect a flat or lower tax bracket in retirement, when the conversion tax would have to come out of the IRA itself, or when you're close enough to needing the money that there isn't enough time left for tax-free growth to make up for the tax bill paid today. None of these rule conversion out automatically — they're simply the factors that shift the math, which is why running your specific numbers matters more than following a general rule.

Partial Conversions — Not All or Nothing

Converting doesn't have to mean moving the entire IRA balance at once. A partial conversion — converting just enough each year to "fill up" your current tax bracket without pushing into the next one — is a common strategy, particularly for people converting over several years during a lower-income stretch like early retirement. This lets you capture the benefit of converting at a lower rate without taking on a single large tax bill in one year.

How Conversions Interact With Medicare and Social Security

A Roth conversion doesn't just affect this year's tax bill — it can ripple into other parts of your financial picture that aren't always top of mind. Converting a large amount in a single year increases your reported income for that year, which can push you into higher Medicare IRMAA surcharge brackets roughly two years later, and can also affect how much of your Social Security benefit is taxable in that same year. None of that makes conversion wrong — it just means the "right" amount to convert in any given year is rarely just a tax bracket question in isolation. See the Medicare page for more on how IRMAA works.

What I Actually Need From You to Run the Numbers

A meaningful Roth conversion analysis needs more than a guess at your tax bracket. I typically need your current IRA and Roth balances, your other income sources in retirement (Social Security, pensions, required distributions from other accounts), your state of residence (state tax treatment varies), and a sense of your expected retirement timeline. With that, the software can model out multiple conversion scenarios — converting nothing, converting everything at once, converting a fixed amount over several years — and show the actual projected outcome of each, rather than relying on a generic rule of thumb.

Summary

Converting a traditional IRA to a Roth sounds appealing at a glance — pay taxes now so the money can grow for years tax-free and come out tax-free in retirement. But once you factor in all the relevant variables, converting will often make little economic sense unless you expect to be in a higher (or much higher) tax bracket in retirement, or can pay the conversion tax from money outside the IRA. I use proprietary conversion software so I can tell you, in a matter of minutes, whether converting makes sense for your specific numbers — and if it does, whether a full or partial conversion is the better fit.

Frequently Asked Questions