What is a Traditional IRA? Deductions, limits, and when it beats a Roth

A Traditional IRA is an individual retirement account you open yourself at any brokerage — no employer required. You contribute money, it grows tax-deferred, and you pay ordinary income tax on withdrawals in retirement. The headline attraction is the upfront deduction: in many cases, contributing lowers this year's taxable income. But that deduction comes with strings most people don't know about, and whether a Traditional or a Roth is the better home for your dollars depends entirely on your tax rate now versus later.

The deduction and its phase-outs

Here's the rule almost everyone gets wrong: whether your Traditional IRA contribution is deductible depends on two things — whether you (or a spouse) are covered by a workplace retirement plan, and your income. If neither spouse has a 401(k) or similar at work, the contribution is fully deductible at any income. But if you're covered at work, the deduction phases out over an income band (the IRS updates the thresholds annually). Above the top of the band, you can still contribute — you just get no deduction, creating 'nondeductible' basis you must track on Form 8606.

Traditional vs. Roth, the short version

The core trade is simple: Traditional gives you a tax break now and taxes withdrawals later; Roth gives no break now but withdrawals are tax-free. Traditional tends to win when your current tax rate is higher than your expected retirement rate — classically, peak-earning years. Roth tends to win early in a career or in a temporarily low-income year. Because most people's withdrawals in retirement fill the low brackets first (the standard deduction and the 10-12% bands), a large Traditional balance often comes out at an effective rate below the rate you deducted at — which is the quiet case for Traditional that headline comparisons miss.

The rules that trip people up

• You need earned income (wages or self-employment) at least equal to your contribution — investment income doesn't count. A non-working spouse can use a spousal IRA if the couple files jointly.
• The limit is per person across all your IRAs combined — Traditional and Roth together, not per account.
• Withdraw earnings before 59½ and you generally owe income tax plus a 10% penalty, with a list of exceptions (first home, disability, certain medical and education costs).
• RMDs eventually force money out and onto your tax return — the price of decades of deferral, and the reason big Traditional balances need a withdrawal plan.
• A SEP or SIMPLE IRA balance counts as pre-tax IRA money for the pro-rata rule, which can complicate a future backdoor Roth.

The bottom line

A Traditional IRA is the deferral tool: deduct now if you qualify, grow tax-deferred, and pay tax on the way out. Its edge is a current deduction and the likelihood that retirement withdrawals fill the low brackets — its costs are RMDs and the phase-out rules that catch workplace-plan participants. Contribute if you have earned income, check whether you're actually eligible to deduct, keep Form 8606 for any nondeductible dollars, and choose Traditional over Roth mainly when today's tax rate clearly beats your expected rate in retirement. This isn't individualized tax advice; if your income sits in a phase-out band, a quick check with a CPA pays for itself.