Pick a Roth IRA if you expect a higher tax rate in retirement than you pay today, and a traditional IRA if you expect a lower one. If the two rates match, the math comes out the same. That is the whole test, and the rest of this guide shows why it works and which rules can make the choice for you.
This is educational content, not financial advice. Tax rules depend on your situation. For a decision with large amounts, talk to a tax professional.
The 2026 limits
These figures come from the IRS announcement for 2026.
| Rule | 2026 amount |
|---|---|
| Contribution limit, all your IRAs combined | $7,500 |
| Extra catch-up at age 50 or older | $1,100 |
| Roth phase-out, single or head of household | $153,000 to $168,000 |
| Roth phase-out, married filing jointly | $242,000 to $252,000 |
| Traditional deduction phase-out, single, covered by a workplace plan | $81,000 to $91,000 |
| Traditional deduction phase-out, married, contributor covered by a workplace plan | $129,000 to $149,000 |
The limit is shared. You can split your money between both types, but the total cannot pass $7,500, or $8,600 with the catch-up.
The difference in one sentence
With a traditional IRA, you may get a deduction now and pay income tax when you withdraw. With a Roth IRA, you pay tax now and qualified withdrawals come out tax-free.
The math: $5,000 of income, 30 years
Suppose you set aside $5,000 of pre-tax income, you are in the 22% bracket today, and the money grows 6% a year for 30 years. The 6% is only an assumption for this example, not a promise of any return.
- Roth: you pay $1,100 in tax first, so $3,900 goes in. It grows to about $22,399, and you keep all of it.
- Traditional: the full $5,000 goes in and grows to about $28,717. Then you pay tax on the withdrawal.
| Your tax rate at withdrawal | Traditional, after tax | Roth | Winner |
|---|---|---|---|
| 12% | $25,271 | $22,399 | Traditional |
| 22% | $22,399 | $22,399 | Tie |
| 32% | $19,528 | $22,399 | Roth |
The account type does not create the win. The gap between today’s rate and your future rate does. That also means no one can give you a certain answer, because no one knows future tax rates or your future income.
Rules that can decide it for you
Your income is above the Roth range
Inside the phase-out range, your allowed Roth contribution shrinks. Above it, you cannot contribute directly. Note that the limit looks at your modified adjusted gross income, not your salary.
You have a workplace plan and a higher income
You can still contribute to a traditional IRA, but your deduction may shrink or disappear. A traditional contribution with no deduction loses the main benefit. In that case, a Roth is usually easier if you qualify. If you do make nondeductible contributions, you need to track them on your tax return.
You have no earned income
Generally, you need taxable compensation to contribute. Check the IRS contribution rules if your situation is unusual, such as a spousal IRA.
Differences beyond the tax rate
| Traditional IRA | Roth IRA | |
|---|---|---|
| Tax break | Now, if you qualify | Later, on qualified withdrawals |
| Required withdrawals | Yes, starting at the required age | None during the original owner’s life |
| Early access | Withdrawals are generally taxed, and a 10% penalty often applies before 59½ | Contributions can generally come out anytime; earnings have stricter rules |
| Best fit | Higher earners today expecting less income later | Early-career savers expecting higher income later |
The Roth’s access to contributions is useful, but it should not replace an emergency fund. Keep that in high-yield savings so a surprise bill does not raid your retirement.
Who should lean which way
- Lean Roth: you are early in your career, in a lower bracket than you expect later, or you value tax-free income and no required withdrawals.
- Lean traditional: you are in a high bracket now, you qualify for the full deduction, and you expect lower income in retirement.
- Split it: you truly have no idea. Holding both gives you options later, when you can choose which account to draw from in a given year.
- Skip the IRA for now: you have an employer match you are not getting in full, or high-interest card debt. A match is hard to beat, and a card at over 20% is a guaranteed cost. See our balance transfer math.
Don’t miss the deadline
For most people, you can make 2026 contributions until the federal tax filing deadline in April 2027, but check the IRS date for your situation. Opening the account is not enough, either: the money has to be invested inside it, or it may sit in cash. If you want that handled for you, read our guide to robo-advisors.
Our take
If you are under 35 and not yet in a high bracket, we would start with the Roth. Your income is more likely to rise than fall, and tax-free money gives you flexibility later. If you are in your peak earning years with a full deduction available, the traditional IRA’s tax break today is hard to pass up. And if you cannot decide, split it and start. Contributing is what matters most, so don’t let the label delay it.