IRA: The Retirement Account That Doesn't Depend on Your Employer
Not everyone has access to a 401(k), and even those who do often benefit from a second tax-advantaged bucket alongside it. An individual retirement account exists precisely for that gap, but the choice between its Traditional and Roth versions is really a bet on your own future tax rate, one that many people make without ever framing it that way.
The core principle
An individual retirement account (IRA) is a tax-advantaged US retirement account that you open and control directly through a brokerage, independent of any employer. Unlike a 401(k), which exists only if your employer sponsors one, an IRA is available to nearly anyone with earned income, subject to contribution and, for some features, income limits. The two dominant versions work on opposite tax timing.
A Traditional IRA may allow a full or partial deduction of your contribution against this year's taxable income, depending on your income and whether you or a spouse are also covered by a workplace plan; the account then grows tax deferred, and withdrawals in retirement are taxed as ordinary income. A Roth IRA is funded with money you have already paid tax on, offering no deduction today, but the account then grows completely tax free, and qualified withdrawals in retirement, generally after age 59 and a half and once the account has been open at least 5 years, owe no tax at all, on either the contributions or the decades of accumulated growth.
The choice between them reduces, mathematically, to a comparison of your marginal tax rate today versus your expected marginal tax rate in retirement. If those two rates were identical, the two account types would produce mathematically identical after-tax outcomes; the entire practical difference in outcome comes from a mismatch between the rate you pay now and the rate you expect to pay later.
How the math works
Example 1: contributing at the same tax rate in both periods. Suppose a saver in the 24% marginal bracket contributes $7,000 to a Traditional IRA, saving $7,000 x 0.24 = $1,680 in taxes this year. If that $7,000 grows to $50,000 over several decades and the saver withdraws it in retirement still in the 24% bracket, the tax owed on withdrawal is $50,000 x 0.24 = $12,000, leaving $50,000 − $12,000 = $38,000 after tax. Now compare a Roth contribution: the saver contributes the after-tax equivalent, which required earning $7,000 / (1 − 0.24) = $9,211 pre-tax to have $7,000 left after paying the 24% tax today. If that same $7,000 grows to $50,000 tax free and is withdrawn with no further tax, the saver keeps the full $50,000. Adjusting for the fact that the Roth contribution required $9,211 of pre-tax income versus $7,000 for the deductible Traditional contribution, and growing that extra $2,211 of foregone contribution room at the same rate, the two paths land at effectively the same after-tax wealth, confirming that equal tax rates produce equal outcomes.
Example 2: a realistic scenario where the rates differ. Consider a saver early in a career in the 12% bracket who expects to retire in the 22% bracket due to career earnings growth and pension income. Contributing $7,000 to a Roth IRA now costs the saver a tax bill on that income at only 12%, versus deferring the tax to retirement where it would be taxed at 22%. If that $7,000 grows to $60,000, the Roth path delivers the full $60,000 tax free, while a Traditional contribution of the same $7,000 growing to the same $60,000 would owe $60,000 x 0.22 = $13,200 in tax upon withdrawal, leaving only $60,000 − $13,200 = $46,800 after tax. In this case, choosing Roth over Traditional was worth roughly $60,000 − $46,800 = $13,200 in this single contribution alone, purely from paying tax at the lower rate available today rather than the higher rate expected later.
How it shows up in real portfolios
New workers and residents in low-earning training years commonly favor Roth IRAs, since their current tax rate is often the lowest it will ever be relative to their eventual career earnings, making tax-free growth on decades of future compounding especially valuable. As income rises later in a career, the calculus can shift, and additional retirement savings often moves toward Traditional accounts or workplace plans where the current-year deduction carries more weight against a high marginal rate.
High earners frequently discover they are ineligible to contribute directly to a Roth IRA at all, since Roth eligibility phases out above certain modified adjusted gross income thresholds; this is where the backdoor Roth IRA maneuver, contributing to a nondeductible Traditional IRA and then converting it to Roth, becomes relevant, though it works cleanly only when the saver has no other pre-tax IRA balances, due to the pro-rata rule governing conversions.
A relevant scenario for a high-earning professional: an attorney earning $340,000 a year is well above the Roth IRA direct contribution income limit and cannot deduct a Traditional IRA contribution either, since income that high also phases out the deduction when a workplace plan is available. Rather than skipping IRA savings entirely, this attorney contributes $7,000 to a nondeductible Traditional IRA and converts it to Roth shortly afterward, capturing the account's future tax-free growth despite an income level that would otherwise lock out a Roth IRA entirely, provided no other pre-tax IRA balances complicate the conversion's tax treatment.
Self-employed individuals and small business owners without access to a workplace plan often lean on an IRA as their primary retirement account structure, sometimes alongside a SEP IRA or Solo 401(k) that permits far higher contribution limits tied to business income. A freelance consultant with variable year-to-year earnings can use a standard IRA every year regardless of income level, while layering a SEP IRA on top only in stronger income years, giving the flexibility that a single fixed-contribution employer plan would not provide. This layered approach is one reason the IRA remains relevant even for savers who also have access to other, larger retirement vehicles.
Inherited IRAs add another layer of complexity worth understanding well before it becomes personally relevant. Since a change in federal law took effect in the early 2020s, most non-spouse beneficiaries who inherit an IRA are now required to empty the account within 10 years of the original owner's death, rather than stretching withdrawals across their own lifetime as older rules once permitted. For a beneficiary who inherits a large Traditional IRA balance during their own peak earning years, that compressed withdrawal window can push a meaningful amount of taxable income into some of their highest-tax-rate years, making the timing of withdrawals within that 10-year window a genuine planning decision rather than an afterthought.
Actionable breakdown
- Open either a Traditional or Roth IRA at essentially any major brokerage, generally at no cost.
- Choose Roth if you expect a higher tax rate in retirement than today.
- Choose Traditional if you expect a lower tax rate in retirement than today.
- Check the current annual contribution limit before funding the account.
- Confirm whether income limits restrict a direct Roth contribution or a Traditional deduction.
- Actually invest the contributed cash; an unfunded IRA earns nothing sitting idle.
- Consider a backdoor Roth if income exceeds the direct contribution limits.
Common pitfalls
- Contributing cash to an IRA but never investing it, leaving the money sitting in a settlement fund earning little to nothing for months or years.
- Missing the contribution deadline, which typically extends until the tax filing deadline of the following year, a window many savers do not realize they still have.
- Assuming high income locks you out of the Roth ecosystem entirely, when a backdoor Roth conversion remains available for most high earners without existing pre-tax IRA balances.
- Ignoring the pro-rata rule when attempting a backdoor Roth while still holding other pre-tax Traditional, SEP, or SIMPLE IRA balances, which can create an unexpectedly large and partly taxable conversion.
Related concepts
For the high-income workaround, see backdoor Roth IRA and pro-rata rule. For the withdrawal-side counterpart, see required minimum distribution (RMD). For the tracking mechanism behind nondeductible contributions, see nondeductible IRA contribution. For fuller context, see the guides on retirement accounts, the backdoor Roth, and tax efficiency.
The bottom line
An IRA is one of the simplest, most portable tax shelters available to nearly any earner, and the Traditional versus Roth decision comes down to a single honest bet on whether your tax rate will be higher or lower when the money finally comes out.