Roth vs Traditional IRA: which one (or both) makes sense for you?

The 90-second version

A Traditional IRA gives you a tax break today. You contribute pre-tax dollars (within IRS limits and phase-outs), the money grows tax-deferred, and you pay ordinary income tax when you pull it out in retirement.

A Roth IRA flips the timing. You contribute after-tax dollars — no current deduction — but qualified withdrawals in retirement come out completely tax-free, including all the growth.

The single biggest variable in choosing between them is this: do you expect your marginal tax rate to be higher or lower in retirement than it is today?

If you think your rate will be lower in retirement, Traditional usually wins. If you think it will be higher — or if you simply want to hedge against an uncertain future tax code — Roth (or a mix of both) usually wins. Most affluent households end up wanting both buckets, and the more interesting decisions are about how much to put where, and whether to convert.

The rest of this piece walks through the mechanics, the decision framework, and the strategic moves that get overlooked.

Traditional IRA — the mechanics

The deduction. Traditional IRA contributions are an above-the-line deduction, meaning they reduce your Adjusted Gross Income directly — you don’t have to itemize to get the benefit. There is a catch: if you (or your spouse) are covered by a workplace retirement plan, the deduction phases out at certain income levels. Above the upper end of the phase-out, the deduction disappears entirely, though you can still make a non-deductible contribution. The exact phase-out ranges change annually — confirm current figures with the IRS.

Tax treatment of growth. Inside the account, dividends, interest, and capital gains are not taxed. This is the “tax-deferred” part. You are not forced to think about turnover, harvesting, or 1099s on holdings inside the IRA.

Required Minimum Distributions (RMDs). Once you reach the current RMD age — 73 under SECURE 2.0, with the age scheduled to shift again in the coming years — the IRS requires you to start withdrawing a calculated minimum each year, whether you need the money or not. The amount is based on your account balance and an IRS life-expectancy factor. The point is to stop you from sheltering money tax-deferred indefinitely.

Withdrawal taxation. Money coming out of a Traditional IRA in retirement is taxed as ordinary income, the same as wages. Not capital-gains rates — ordinary rates. This matters because long-term appreciation that would have been taxed at 15% or 20% in a brokerage account is taxed at your full marginal bracket coming out of an IRA.

Early withdrawal penalty. If you pull money out before age 59½, you generally owe a 10% penalty on top of the ordinary income tax. There are exceptions — first-time home purchase (up to a limit), qualified higher education expenses, certain medical expenses, disability, and a handful of others — but the default assumption should be that early withdrawals are expensive.

Roth IRA — the mechanics

Funded with after-tax dollars. No current deduction. You’re paying tax on the income now and putting what’s left into the Roth.

Tax-free qualified withdrawals. Withdrawals are completely tax-free — including all the growth — as long as two conditions are met: you are at least 59½, and the account has been open for at least five years (the “5-year rule”). The 5-year clock starts on January 1 of the year of your first contribution to any Roth IRA, so opening one early — even with a small contribution — is a quietly valuable move.

Contributions can come out anytime. Your contributions (not earnings) can be withdrawn at any age, for any reason, with no tax and no penalty. This makes a Roth surprisingly flexible if you ever need access. Earnings are a different story and are subject to the 5-year rule and 59½ test.

No RMDs during the original owner’s life. Unlike a Traditional IRA, a Roth has no RMDs while you’re alive. You can let it compound, untouched, for decades. For affluent households who don’t need the money for spending, this is one of the most powerful estate-planning features in the tax code.

Income limits. The ability to contribute directly to a Roth phases out above certain income levels, which differ for single and joint filers. Above the upper end, you cannot contribute directly at all. The phase-out ranges are inflation-adjusted each year — check current IRS figures.

The “Backdoor Roth.” High earners who are phased out of direct Roth contributions can often still get money into a Roth through a two-step process: make a non-deductible contribution to a Traditional IRA, then convert that Traditional IRA to a Roth. There is no income limit on conversions, which is what makes it work.

The pitfall is the pro-rata rule. The IRS does not let you cherry-pick which dollars convert. If you have any pre-tax money in any Traditional, SEP, or SIMPLE IRA in your name, the conversion is treated as a proportional mix of pre-tax and after-tax dollars across all of them. The result is an unexpected tax bill. Backdoor Roths work cleanly when you have no other pre-tax IRA balances; they get messy fast when you do. This is one of the most common areas where DIY backfires.

The decision framework

When Traditional usually wins:

  • You’re in a high marginal bracket today and reasonably expect to be in a lower one in retirement.
  • You value the current-year deduction — for example, to drop yourself below an income threshold for another tax benefit.
  • You’re in your peak earning years and your retirement spending will be materially lower than your current income.

When Roth usually wins:

  • You’re early-career or in a low-income year and your bracket today is unusually low.
  • You expect higher tax rates in retirement, either because you’ll have substantial taxable income (pensions, rental income, business sale proceeds, large RMDs) or because you think federal tax rates will rise.
  • You want to leave money to heirs as efficiently as possible — a Roth passes without income tax to the beneficiary and, under current rules, can continue to grow tax-free for up to a decade after.
  • You want tax diversification and the optionality of a tax-free withdrawal source in retirement.

When both make sense: Most affluent households benefit from having money in both buckets. Tax diversification gives you control in retirement: in a high-income year, pull from the Roth; in a low-income year, pull from the Traditional and fill up the lower brackets. It also hedges against future tax-rate changes — nobody knows what brackets will look like in 20 years, and having both buckets means you don’t have to.

Roth conversions — the strategic move retirees should know

A Roth conversion is when you move money from a Traditional IRA into a Roth IRA. You pay ordinary income tax on the converted amount in the year you convert, and from that point forward the money grows tax-free with no future RMDs.

The strategic question is when to convert. The best windows are typically:

  • Early retirement, before Social Security and RMDs kick in. Many retirees have a several-year stretch where earned income has stopped but Social Security and RMDs haven’t started. Taxable income is low, lower brackets are wide open, and conversions can be done at much lower rates than the household will face later.
  • A low-income year. A layoff, a sabbatical, a year between jobs, or a year with large business losses creates a temporary drop in your bracket. Converting in that window is high-leverage.
  • A market drawdown. Converting when account values are temporarily depressed lets you move the same shares into a Roth at a lower tax cost, then have the recovery happen tax-free.

The trade-off is real: you’re prepaying tax. You’re betting that the elimination of future RMDs and the tax-free growth on everything that follows will be worth more than the cash you’re handing the IRS today. For most retirees with a long horizon and a Traditional IRA that will eventually be subject to RMDs, that math works — but it has to be run with your specific numbers.

The “conversion ladder” is the technique used by early retirees who need access to retirement money before 59½. Each year, you convert a chunk from Traditional to Roth and pay the tax. Five years after each conversion, that converted amount can be withdrawn from the Roth without penalty (the conversion has its own 5-year clock, separate from the contribution 5-year clock). Stagger the conversions and you create a rolling stream of penalty-free access.

Common mistakes

Forgetting the 5-year rule. People assume that hitting 59½ is enough. It’s not — the account itself has to be at least five years old. And conversions each have their own 5-year clock for penalty-free access of the converted amount before 59½.

Triggering the pro-rata rule on a backdoor Roth. If you have any pre-tax balance in a Traditional, SEP, or SIMPLE IRA at the end of the year you do a backdoor conversion, the IRS will tax a proportional slice of it. Some people clean this up by rolling pre-tax IRA balances into a workplace 401(k) first. This needs to be planned, not improvised.

Missing an RMD on a Traditional IRA. The penalty for missing or under-distributing an RMD used to be 50% of the shortfall — genuinely brutal. SECURE 2.0 reduced it (currently 25%, dropping to 10% if corrected promptly), but it is still a meaningful penalty for what is typically just an oversight. Set up automatic RMDs.

Naming the estate as beneficiary instead of a person or trust. This is one of the costliest paperwork mistakes in personal finance. Naming the estate (or leaving the beneficiary line blank) typically forces faster distribution, eliminates the “stretch” potential, and pulls the IRA through probate. A named individual or properly drafted trust beneficiary preserves the tax-deferred (or tax-free, in the Roth case) compounding for years longer.

Not coordinating spouse contributions. A non-working or lower-earning spouse can usually still fund an IRA via a spousal contribution if the household has earned income. Many couples leave this on the table.

Treating the IRA as set-and-forget. A Roth-vs-Traditional decision made in your 30s may be wrong by your 50s. Bracket changes, business sales, inheritances, divorce, retirement timing, and tax-law changes all shift the optimal answer. The accounts should be revisited every few years and around major life events.

Closing

Whether to contribute to Traditional, Roth, or both depends on your current bracket, expected future bracket, and how the rest of your portfolio is structured. If you’d like a clear-eyed look at what makes sense for your specific situation, schedule a complimentary 30-minute conversation with Tim Travis.

This is general educational content and is not personalized investment, tax, or legal advice. IRA contribution limits, income phase-outs, RMD ages, and tax rates change over time — confirm current figures with the IRS or a qualified tax professional before acting. T&T Capital Management is an SEC-registered investment adviser. Registration with the SEC does not imply a certain level of skill or training.