Every dollar you put into an individual retirement account gets taxed exactly once. The entire Roth-versus-traditional question is about when: on the way in, or on the way out. That framing dissolves most of the mystique around what is otherwise a genuinely consequential piece of paperwork. What follows is the machinery of both account types, current limits included, presented as education rather than advice about which is right for any particular person.
The shared chassis
Both are individual retirement arrangements: accounts you open yourself at a bank or brokerage, independent of any employer. Both accept contributions only from earned income, and both shelter whatever happens inside the account, interest, dividends, and sales, from year-by-year taxation. For 2025, the combined contribution limit across all your IRAs is $7,000, plus a $1,000 catch-up for those 50 and older; the IRS raised the base limit to $7,500 for 2026. Contributions for a given tax year can be made until that year's April filing deadline, and current figures are always posted on the IRS's IRA limits page.
Inside either wrapper, the account holds whatever investments you choose from the institution's offerings, from insured certificates of deposit to the broad market funds described in our index fund explainer. The wrapper determines taxation; it does not determine what is inside.
Two lesser-known mechanics round out the shared rules. A non-working spouse can fund an IRA of either type based on the working spouse's earned income, provided the couple files jointly, so a single-earner household can double its annual IRA capacity. And lower-income savers may qualify for the Saver's Credit, a federal tax credit worth up to $1,000 per person for retirement contributions, layered on top of whichever account type receives the money; the eligibility thresholds are posted at irs.gov and change each year.
Traditional: deduct now, taxed later
A traditional IRA contribution may be deductible from this year's taxable income. The deferred tax comes due when money exits: withdrawals are taxed as ordinary income, and withdrawals before age 59½ generally add a 10% early distribution tax on top, with enumerated exceptions. Under current law, required minimum distributions force money out annually beginning at age 73, whether needed or not.
The deduction is the asterisk. It phases out at moderate incomes if you or your spouse is covered by a workplace retirement plan; for 2025, the phase-out for a covered single filer runs from $79,000 to $89,000 of modified adjusted gross income, and $126,000 to $146,000 for covered joint filers. Uncovered taxpayers with a covered spouse face a higher band, and taxpayers with no workplace plan at all deduct in full at any income. Nondeductible traditional contributions remain possible above the bands, with their own recordkeeping burden on Form 8606.
Roth: taxed now, clean later
Roth contributions are never deductible; you fund the account with money already taxed. The payoff sits at the far end: qualified withdrawals, generally after age 59½ and a five-year clock that starts with your first Roth contribution, are entirely tax-free, earnings included. The clock is measured in tax years and starts January 1 of the year of that first contribution, so it frequently runs shorter in practice than it sounds. Roth IRAs also carry no required minimum distributions during the owner's lifetime, so the balance can sit untouched indefinitely.
Two mechanical features distinguish the Roth beyond the headline. First, your direct contributions, though not the earnings on them, can be withdrawn at any time, at any age, without tax or penalty, because that money was taxed before it went in. Second, eligibility to contribute phases out with income: for 2025, from $150,000 to $165,000 of modified AGI for single filers and $236,000 to $246,000 for joint filers. Above the band, direct contributions are barred, though conversions from traditional accounts remain legal at any income, a mechanism with tax consequences beyond this article's scope. Details live in IRS Roth IRA guidance.
The comparison, condensed
| Traditional IRA | Roth IRA | |
|---|---|---|
| Tax on contribution | Often deductible, subject to phase-outs | Never deductible |
| Tax on qualified withdrawal | Ordinary income | None |
| Early withdrawal | Tax plus 10% additional tax, with exceptions | Contributions anytime; earnings restricted |
| Income limit to contribute | None (deduction may phase out) | Yes, phases out at higher incomes |
| RMDs for the owner | Begin at age 73 | None |
| 2025 limit | $7,000 combined across both types, $8,000 if 50+ | |
The arithmetic underneath the choice
Strip away the acronyms and one variable dominates: your marginal tax rate at contribution versus your rate at withdrawal. If the rates were identical at both ends, equal-sized pre-tax and after-tax contributions produce identical spending power; the commutative property of multiplication does the work. The accounts diverge when the rates diverge. A deduction taken against a high current rate, repaid at a lower future rate, favors the traditional structure; tax prepaid at a low current rate, escaping a higher future rate, favors the Roth. Which rates will actually apply to any given person involves career trajectory, future law, and state of residence, which is exactly why this is a mechanics lesson and not a recommendation. How marginal brackets themselves work, and why your "tax bracket" is not the rate you pay on every dollar, is covered in our piece on marginal tax rates.
The honest complication I always flag: nobody knows future tax law, their own future income, or future spending needs with certainty. Hedging by holding both account types over a career is a structure some savers use, and describing that fact is as far as an education article can responsibly go.
Recurring misconceptions, corrected
- "An IRA is an investment." It is a tax wrapper. An IRA holding cash and an IRA holding stock funds behave nothing alike; the label on the wrapper tells you only the tax treatment.
- "I have a 401(k), so IRAs are not for me." The accounts coexist; workplace coverage affects only the traditional deduction bands above. The workplace side has its own rules, mapped in our 401(k) guide.
- "Roth is always better." Roth prepays tax at your current marginal rate. Whether that trade wins depends on the rate comparison above, not on the account's popularity.
- "I earn too much for any IRA." The income phase-out applies to Roth contributions and to the traditional deduction, not to the traditional contribution itself.
- "I can borrow from my IRA." IRAs have no loan provision, unlike many 401(k) plans. Money out is a distribution, full stop.
Paperwork that outlives you
One unglamorous mechanic deserves its own paragraph: the beneficiary designation on the account overrides your will. IRAs pass by contract, directly to whoever is named on the form, and an ex-spouse or deceased parent left on a decades-old designation creates exactly the mess you imagine. Reviewing designations after every major life event is the cheapest estate planning that exists. Inherited IRAs follow their own distribution timetables, generally requiring most non-spouse beneficiaries to empty the account within ten years under current rules.
Next step: check two numbers against your own situation, your modified adjusted gross income relative to this year's phase-out bands, and whether a workplace plan covers you, then read the current-year limits directly at irs.gov, since every figure in this article carries a tax-year label for a reason. That verification habit, more than any account choice, is the transferable skill. Education only, as ever; the decision belongs to you and, if the sums are large, to a qualified tax professional who can see your whole return.
