The Traditional IRA, established by the Employee Retirement Income Security Act (ERISA) of 1974, allows workers to make tax-deductible contributions that grow tax-deferred until withdrawal in retirement. For 2025, the annual contribution limit is $7,000 ($8,000 for those age 50 and older). The key advantage is the upfront tax deduction: contributing $7,000 while in the 24% tax bracket saves $1,680 in federal taxes immediately. However, all withdrawals in retirement are taxed as ordinary income, and required minimum distributions (RMDs) must begin at age 73 under the SECURE 2.0 Act. The Traditional IRA is most beneficial for individuals who are currently in a higher tax bracket than they expect to be in retirement — the tax savings today outweigh the future tax liability on withdrawals. Full deductibility phases out for workers covered by an employer plan: in 2025, single filers begin losing the deduction at $79,000 MAGI and lose it entirely above $89,000. Early withdrawals before age 59½ incur a 10% penalty plus ordinary income tax, though exceptions exist for first-time home purchases (up to $10,000), qualified education expenses, and certain medical costs.
How Traditional IRA's tax deferral works
Traditional IRA is a tax timing strategy: you get a deduction when you contribute (based on your current marginal rate) and pay tax when you withdraw (based on your retirement marginal rate). The account grows tax-deferred in between — no taxes on dividends, interest, or capital gains as long as the money stays in the IRA. This is valuable because it lets more of your gross return compound, and because you control the timing of when the tax bill comes due. If you expect a lower tax rate in retirement, Traditional is mathematically better; if you expect a higher rate, Roth wins.
The apples-to-apples comparison
A fair Traditional vs Roth comparison requires comparing the same pre-tax income allocation. If you have $7,000 of pre-tax salary to save: with Traditional, all $7,000 goes into the account. With Roth at 22% marginal rate, only $5,460 goes in (you pay $1,540 in tax first). The Traditional account grows larger because it has more starting capital, but you owe taxes at the end. If your retirement tax rate equals your current rate, the two end up mathematically identical. If retirement rate is lower, Traditional wins; if higher, Roth wins. Many people split contributions for tax diversification.