At 55, this decision carries real weight. You’ve got roughly a decade of peak earning years ahead — maybe more — and the choice between a Roth IRA and a Traditional IRA will echo through your taxes for the next 30 years. Most people pick wrong. Not because they don’t care, but because they’re asking the wrong question.
Wrong question: "Which one saves me more on taxes this year?"
Right question: "Which one leaves me with more after-tax money across my entire retirement?"
Those have different answers. At 55 in the 22 percent bracket, the Roth IRA almost always wins. Here’s why — with actual math.
The Joe L. Take
I spent 30 years at the National Weather Service, and the one thing that career teaches you about risk is that people dramatically underestimate how much things change over a 20- to 30-year horizon. At 40, I thought my retirement would look financially similar to my working years — similar spending, similar tax picture. I was wrong. By 55, I had a much clearer view of what retirement income actually looks like. The required minimum distribution problem was one thing nobody warned me about early enough. If you’re in the 22 percent bracket now and have a growing traditional account balance, you need to think seriously about where those mandatory withdrawals will push you in your 70s.
What the 22 Percent Bracket Actually Means
For a single filer, the 22 percent federal bracket covers a wide range of middle-class income — roughly from the upper-$40,000s to around $100,000 in taxable income, though these thresholds adjust annually and you should verify current figures at irs.gov. For married filing jointly, the range is approximately double. If you’re solidly mid-bracket — not at the very bottom edge — you’re paying 22 cents in federal tax on every additional dollar of income.
A Traditional IRA gives you a deduction now. That deduction is worth 22 cents per dollar at your bracket. You pay no tax on the contribution, the money grows, and you pay ordinary income tax on every dollar you withdraw in retirement.
A Roth IRA gives you no deduction now. You pay 22 cents per dollar today. The money grows tax-free, and you pay nothing on qualified withdrawals in retirement.
On paper these seem equivalent — 22 percent now versus 22 percent later. But they’re not, for three reasons that matter a lot specifically at 55.
Reason One: Required Minimum Distributions
Traditional IRAs carry mandatory withdrawals starting at age 73. The IRS calculates what you must take out each year based on your account balance and life expectancy tables. You don’t decide. You don’t postpone. You take what the formula says you take, and you pay income tax on it.
Here’s the trap: if you’ve been a disciplined saver and have $400,000 or $600,000 in a Traditional IRA, those RMDs can push you into the 24 percent or even 32 percent bracket during your 70s — especially combined with Social Security income and any pension payments. You paid 22 percent to defer taxes. Now you’re paying 24 or 32 percent to take the money out. That’s the wrong direction.
Roth IRAs have no required minimum distributions. Zero. The money can sit and compound indefinitely without the government forcing withdrawals. If you have $450,000 in a traditional IRA, the math on what those mandatory withdrawals look like at 73 is sobering — Roth sidesteps this problem entirely.
Reason Two: The 22 Percent Bracket Is Historically Low
Tax rates have been much higher in American history. The top marginal rate hit 50 percent in the early 1980s, and 70 percent before that. Nobody expects those extremes again soon, but the tax rates established by the 2017 Tax Cuts and Jobs Act were designed with an expiration — the current structure was set to sunset after a certain period, and Congress has to act to extend them. Betting that your tax rate stays low for the next 20 to 30 years is a bet on government policy. That’s a bet I wouldn’t make with retirement savings.
Paying 22 percent now to lock in tax-free growth is a real hedge against rate uncertainty. It’s not guaranteed to pay off. But it’s a meaningful risk management move, especially over a 30-year horizon.
Reason Three: The IRMAA Trap — Medicare’s Hidden Tax on Traditional IRA Holders
This one surprises people. Medicare Part B and Part D premiums use a surcharge system called IRMAA (Income-Related Monthly Adjustment Amount). If your Modified Adjusted Gross Income exceeds certain thresholds in a given year, your Medicare premiums jump — and Traditional IRA withdrawals count toward that MAGI. So does Social Security income, pension income, and interest from savings.
A retiree at 74 with $500,000 in a Traditional IRA taking required minimum distributions can end up with inflated Medicare premiums on top of ordinary income tax on those withdrawals. The IRMAA trap and the two-year lookback rule catch a lot of retirees completely off guard — they never thought about Medicare cost implications when choosing Traditional at 55. Roth IRA withdrawals don’t count toward MAGI for IRMAA purposes. They’re invisible to Medicare’s income calculation. That invisibility is worth real money each month in retirement.
When Traditional Makes More Sense at 55
There are scenarios where Traditional IRA is the right call. It’s not always Roth.
If you genuinely expect your income to drop substantially in retirement — say, you’re currently earning $90,000 and you expect to live primarily on Social Security paying around $2,200 per month, with limited savings — you might land in the 12 percent bracket in retirement. Paying 22 percent now to take withdrawals at 12 percent later is a bad trade. Traditional wins in that scenario, clearly.
If you already have a large Traditional IRA balance and plan to execute Roth conversions in the years between retirement and age 73, a Traditional IRA contribution now matters less — your conversion strategy already handles the tax diversification work.
But for most 55-year-olds who’ve been consistent savers, who have a meaningful pre-tax 401k balance growing in the background, and who expect retirement income in the same ballpark as current income? The RMD math alone tips the scales toward Roth.
The 10-Year Window: Why 55 Is Actually a Smart Age to Prioritize Roth
Here’s an underappreciated point. You have roughly 10 full years of catch-up eligible contributions ahead before you hit 65 and the Medicare years begin. That’s a meaningful runway.
At 55 and older, the IRA contribution limit includes a catch-up provision — a base contribution plus an additional catch-up amount, for a total that’s higher than what younger investors can put in. Check irs.gov for the current limits, which adjust for inflation. Over 10 years at the full catch-up amount, you’re adding tens of thousands of after-tax dollars to a tax-free account — with decades of compound growth on top.
That Roth IRA balance at 65, 70, or 75 is a flexibility lever. Need to stay under the IRMAA income threshold? Draw from Roth. Want to reduce the portion of Social Security that gets taxed? Draw from Roth. Need to keep your bracket controlled while taking a pension? Draw from Roth. It’s financial optionality. Traditional IRA doesn’t give you that.
What If You Earn Too Much to Contribute Directly to a Roth IRA?
There’s an income limit on direct Roth IRA contributions. Above a certain MAGI threshold, the contribution phases out and eventually becomes zero. The cutoffs adjust annually, so verify current figures at irs.gov — but if your income is solidly in the six figures as a single filer, you may be above the direct contribution limit.
In that case, the backdoor Roth IRA is the solution. Contribute to a Traditional IRA (as a non-deductible contribution), then convert it to Roth. This works cleanly if you have no other pre-tax Traditional IRA money. If you do have an existing Traditional IRA balance, the pro-rata rule kicks in and can create an unexpected tax bill on the conversion. If you have an existing $80,000 Traditional IRA, the pro-rata calculation on a backdoor Roth conversion is exactly the kind of thing people don’t anticipate — worth running the numbers before you execute.
What About the Roth 401k at Work?
Many employers now offer a Roth option inside the 401k. The logic is the same as the IRA question — Roth 401k contributions grow tax-free and have no RMDs after you roll them to a Roth IRA at retirement. If you have the option, splitting 401k contributions between traditional (at least enough to capture the full employer match, which always goes in pre-tax) and Roth is a reasonable tax-diversification approach. The IRA and 401k limits are separate — you can contribute to a Roth IRA on top of a Roth 401k.
The Bottom Line
Most 55-year-olds in the 22 percent bracket are better served by a Roth IRA. Not because paying taxes today feels good, but because:
- Traditional IRAs force RMDs at 73 that can push pre-tax balances into higher brackets at exactly the wrong time
- Roth withdrawals are invisible to Medicare’s IRMAA calculation, which keeps premiums lower
- You have a full decade of catch-up eligible contributions ahead
- The 22 percent bracket is historically low and could rise
- A Roth balance gives you income control in retirement that a Traditional balance doesn’t
The exception: if you’re certain retirement income will be substantially lower than today’s income, Traditional might win. But that certainty is hard to have at 55.
Start here: open a Roth IRA at Fidelity or Vanguard if you don’t already have one. Both have no account minimums and solid low-cost index fund options. The prior-year contribution deadline is April 15 of the following year — don’t leave a year’s worth of Roth contributions on the table.
For a clear, jargon-free breakdown of how Roth versus Traditional plays out across different retirement income scenarios, Rob Berger’s Retire Before Mom and Dad is worth the read. The Bogleheads’ Guide to Retirement Planning handles IRA tax strategy in depth, including conversion planning and account sequencing. And for the long view on keeping costs and taxes low across decades, John Bogle’s The Little Book of Common Sense Investing remains the clearest case for why compound growth is most powerful when the IRS can’t reach it.