Roth vs Traditional IRA: Which Should You Fund in 2026?
The core difference
A traditional IRA gives you a tax deduction today and taxes the money on the way out. A Roth IRA gives you no deduction today but the money comes out tax-free later, including all the investment growth. Everything else about IRAs — the $7,500 contribution limit for 2026, the investments allowed inside them, the 10% early-withdrawal penalty, the required minimum distribution rules — is mostly identical between the two. The choice is essentially a single question: do you expect to be in a higher or lower marginal tax bracket in retirement than you are today?
If you expect to be in a higher bracket later (early-career professional, expecting big income growth, or you think federal rates will rise), the Roth wins — you pay tax now at today’s lower rate and never pay it again. If you expect to be in a lower bracket later (peak earners now, modest retirement spending plans, or planning to retire to a no-income-tax state), the traditional wins — you save tax at today’s high marginal rate and pay it later at a lower rate.
But that’s the simplified version. The real decision involves contribution limits, income-based eligibility, the Saver’s Credit, conversion rules, and how IRAs interact with employer 401(k) plans. We’ll walk through each.
2026 contribution limits
Both account types share a single combined limit. You can split contributions between them however you like; you just can’t exceed the total.
| Age | Annual limit | Total with catch-up |
|---|---|---|
| Under 50 | $7,500 | — |
| 50 and over | $7,500 base + $1,100 catch-up | $8,600 |
The limit applies to all your IRAs combined — you can’t contribute $7,500 to a Roth IRA and another $7,500 to a Traditional IRA. The combined contribution is the cap.
Contributions can be made for the 2026 tax year right up to the federal income tax filing deadline in April 2027. This trailing window is useful for last-minute year-end planning — you can wait until you know your tax bracket before deciding how much (and to which type) to contribute.
Income limits for Roth contributions
Roth IRA eligibility phases out at higher incomes. For 2026:
| Filing status | Full Roth contribution if MAGI is | Partial contribution | No Roth contribution |
|---|---|---|---|
| Single | Up to ~$155,000 | $155,000 – $170,000 | Above $170,000 |
| Married filing jointly | Up to ~$240,000 | $240,000 – $250,000 | Above $250,000 |
(The IRS publishes exact phase-out figures each year; check the most recent IRS guidance for 2026 exact numbers — the bands move with inflation.)
Above the upper phase-out, direct Roth contributions are not permitted. High earners often use the backdoor Roth IRA instead: contribute (non-deductibly) to a traditional IRA, then immediately convert to a Roth. The conversion is generally tax-free if you have no other pre-tax IRA balances, courtesy of the “pro-rata rule”. If you do have pre-tax IRA balances, the pro-rata rule taxes part of the conversion proportionally, which can make the backdoor strategy less attractive.
Deduction limits for Traditional contributions
Traditional IRA contributions are deductible only under certain conditions. If neither you nor your spouse is covered by a workplace retirement plan, the full contribution is deductible regardless of income. If you are covered, the deduction phases out at higher incomes:
| Filing status (covered by workplace plan) | Full deduction if MAGI is | Phase-out |
|---|---|---|
| Single | Up to ~$80,000 | $80,000 – $90,000 |
| Married filing jointly | Up to ~$130,000 | $130,000 – $150,000 |
Above the phase-out, you can still contribute to a traditional IRA but the contribution is non-deductible — you don’t get a current-year tax break, but the money still grows tax-deferred until withdrawal. Non-deductible traditional contributions are tracked on Form 8606 so you don’t pay tax twice on the basis when you eventually withdraw.
For most high-earning households with workplace plans, the practical choice narrows to: Roth IRA (if income allows), backdoor Roth (if it doesn’t), or non-deductible traditional (rarely the best option unless you’re using it as a stepping-stone to a Roth conversion).
The break-even math
The classic example. Assume you’re a single filer at 22% marginal rate today, expect to be at 22% in retirement, and invest $7,500 for 30 years at 7% annual return.
- Roth path: contribute $7,500 after-tax (so cost $7,500 from a $7,500 after-tax bucket; or equivalently $9,615 of pre-tax wages). Grows to $57,100 by year 30. Withdraw $57,100 tax-free.
- Traditional path: contribute $7,500 pre-tax. You save $1,650 in tax today, so the equivalent after-tax cost is $5,850. Grows to $57,100 by year 30. Withdraw $57,100 and pay 22% tax → keep $44,538. Plus the $1,650 of upfront tax savings, invested for 30 years at 7% in a taxable account at perhaps 15% effective drag → grows to roughly $9,800. Combined: $44,538 + $9,800 = $54,338.
Same starting bracket → Roth wins by about $2,800, mostly because of the tax drag on the taxable side of the traditional path. If the retirement bracket drops to 12%, the traditional path wins. If it rises to 32%, the Roth wins decisively.
Use the IRA comparison calculator to model your specific bracket assumptions, time horizon and return expectation.
When the Traditional clearly wins
- You’re in your peak earning years at the 32%+ marginal rate, and you’re confident retirement spending will put you in the 22% bracket or lower.
- You have a defined exit plan to a low- or no-income-tax state in retirement (Florida, Texas, no state tax; Tennessee, Washington also no income tax).
- You’re filling out tax-deferred space to bring AGI under a critical threshold — for example, dropping below the income limit for Roth IRA contributions, the ACA premium subsidy cliff, or the IRMAA Medicare surcharge brackets.
- You expect to claim the Qualified Charitable Distribution rule in retirement, donating IRA funds directly to charity tax-free after age 70½.
When the Roth clearly wins
- You’re early-career at a low marginal rate (10% or 12%) with expected income growth.
- You expect higher future federal tax rates — a defensible view given long-run fiscal pressures.
- You want maximum tax-free retirement income flexibility — Roth withdrawals don’t add to AGI, so they don’t push up Medicare premiums, don’t trigger Social Security taxation, and don’t affect ACA subsidies.
- You want to leave a tax-free inheritance — Roths inherited by non-spouse beneficiaries must be drained within 10 years but the withdrawals are tax-free to the beneficiary.
- You’re in a low-tax year (sabbatical, business loss, between jobs) and can fund a Roth at a rate well below your normal marginal bracket.
The Saver’s Credit — the underused boost
The Saver’s Credit is a federal tax credit (not just a deduction) for retirement contributions made by lower- and middle-income filers. For 2026 it’s worth up to 50% of the first $2,000 contributed ($4,000 MFJ), depending on AGI. A single filer with AGI under ~$22,750 gets the full 50% credit on the first $2,000 of IRA or 401(k) contribution — a $1,000 reduction in their federal tax bill.
The credit phases out completely at AGIs around $39,500 single / $79,000 MFJ. It’s frequently missed by qualifying filers because the phase-out is gradual and the form (Form 8880) isn’t widely promoted. Worth checking every year if your AGI is under those thresholds.
A common hybrid: 401(k) for now, Roth IRA on top
A typical mid-career strategy stacks both vehicles:
- Contribute to the employer 401(k) up to the match — the match is free money and beats any IRA decision.
- Contribute to a Roth IRA up to $7,500 for tax diversification.
- Continue contributing to the 401(k) — Roth 401(k) sub-account if available, or traditional 401(k) for the deduction — up to the $24,500 limit.
This stack gives you a mix of pre-tax and tax-free retirement assets, so you have flexibility in retirement to draw from whichever bucket minimises that year’s tax bill. The optimal pre-tax/Roth ratio depends on your bracket history and your forecast of retirement spending; “all-traditional” or “all-Roth” extremes are rarely optimal.
Required minimum distributions and early withdrawal
Traditional IRAs are subject to RMDs from age 75 (raised from 73 by SECURE 2.0; the previous age 73 still applies to certain filers based on date of birth). Roth IRAs have no RMDs for the original owner — you can leave the money to compound for life if you don’t need it. Inherited Roth IRAs are subject to a 10-year withdrawal rule for non-spouse beneficiaries.
Early withdrawals (before 59½) are subject to a 10% penalty on top of the tax owed. Roth IRA contributions (the amount you put in, not the growth) can be withdrawn at any time, tax-free and penalty-free — this is one of the Roth’s underrated features. Conversions have their own 5-year clock.
Frequently asked questions
Can I have both a 401(k) and an IRA? Yes. The contribution limits are separate. A 50-year-old can contribute up to $32,000 to a 401(k) ($24,500 base + $7,500 catch-up) and $8,600 to an IRA ($7,500 + $1,100 catch-up) in the same year, for $40,600 total of tax-advantaged retirement saving.
Can my spouse contribute to an IRA even if they don’t work? Yes — a “spousal IRA” lets a working spouse contribute on behalf of a non-working spouse up to the same $7,500 limit, as long as the household’s earned income covers both contributions. The non-working spouse must be eligible on the standard Roth income rules.
What’s a backdoor Roth IRA and is it still legal? It’s the workaround for high earners: contribute non-deductibly to a Traditional IRA, then immediately convert to a Roth. Still legal as of 2026. The pro-rata rule complicates it for filers with existing pre-tax IRA balances; a clean backdoor Roth requires either no other pre-tax IRA balance or rolling those balances into a 401(k) first.
Should I convert my Traditional IRA to Roth? Roth conversions are subject to tax in the year of conversion at your ordinary income rate. They make sense in low-income years (a sabbatical, business loss, early retirement before pension or Social Security begins), or when you have an unusually low marginal rate compared to your expected retirement bracket. Don’t convert into the 32%+ bracket unless you have a clear arithmetic reason.
How does the IRA work with state tax? IRA deductions and withdrawals follow state tax law separately. Most states follow the federal treatment, but states like Pennsylvania exempt IRA contributions and withdrawals entirely under different rules. Check your state’s specific treatment for any large IRA decision.
Authoritative sources: IRS Roth IRA rules, IRS Traditional IRA rules, IRS Retirement Topics — IRA Contribution Limits.