The 30-second refresher
- Traditional IRA: deduct contributions now, pay taxes when you withdraw. Best if your tax rate will be lower later.
- Roth IRA: pay taxes now, withdraw tax-free forever. Best if your tax rate will be higher later.
- 2026 limits: $7,500 (under 50) or $8,600 (50+) across both accounts combined, per the IRS.
The math that decides it
Take a 30-year-old earning $70,000 who invests the full $7,500 every year for 35 years at 8% average returns. That grows to roughly $1.43 million.
Scenario A: Traditional IRA
- Saves 22% on every contribution (their current marginal bracket)
- Tax savings per year: $7,500 × 22% = $1,650
- In retirement, withdrawals get taxed as income — likely at a lower rate if income drops
Scenario B: Roth IRA
- Pays the 22% tax now ($1,650/year in taxes on the contribution)
- The entire $1.43 million comes out tax-free at 59½
If both face the same tax rate now and later, it's a tie — commutative property of multiplication. The winner is decided by the rate gap.
Three real scenarios
1. The young professional (Roth usually wins)
Maya, 26, earns $55,000 as a single filer. After the $16,100 standard deduction, her taxable income is $38,900 — she's in the 12% bracket. Paying 12% now to never pay taxes on decades of growth is a steal. Her future self, likely earning more, will thank her.
2. The peak earner (Traditional usually wins)
David, 52, earns $180,000. He's deep in the 24%–32% zone. Deducting $7,500 saves him roughly $2,400 in taxes this year. In retirement, he'll likely withdraw at 12–22%. That rate gap is pure profit.
3. The high earner locked out (backdoor Roth)
Roth contributions phase out for singles earning $153,000–$168,000 and couples at $242,000–$252,000 in 2026. Above that, the move is the backdoor Roth: contribute to a traditional IRA (non-deductible), then convert to Roth. Same destination, extra paperwork.
The tiebreakers nobody mentions
- RMDs: Traditional IRAs force required minimum distributions at 75. Roth IRAs have none for the original owner — your money can compound untouched.
- Early access: Roth contributions (not earnings) can be withdrawn anytime, penalty-free. Traditional hits you with taxes plus a 10% penalty before 59½.
- Estate planning: Heirs get Roth money tax-free. Traditional IRAs hand them a tax bill.
- Tax diversification: Nobody knows future tax rates. Holding both types is a hedge — and most savers end up here.
The simple rule
| Your situation | Winner |
|---|---|
| Young, early career, lower bracket now | Roth |
| Peak earning years, high bracket now | Traditional |
| Income above Roth limits | Backdoor Roth |
| Can't decide | Split it — $3,750 each |
One more thing: this decision is per-dollar, not per-account. You can hold both, and the 2026 combined limit of $7,500 ($8,600 at 50+) applies across all your IRAs together.
FAQ
Q: What's the Roth IRA income limit for 2026?
A: Full contributions for singles under $153,000 MAGI, phasing out to $168,000. Married filing jointly: full under $242,000, phasing out to $252,000.
Q: Can I contribute to both a Roth and traditional IRA?
A: Yes, but the $7,500 combined limit applies across both. You can't do $7,500 in each.
Q: Is it too late to switch strategies?
A: Never. You can change your contribution type every year — even every paycheck for a 401(k). Past contributions stay where they are.
Q: What's the backdoor Roth IRA?
A: A legal two-step for high earners: make a non-deductible traditional IRA contribution, then convert it to a Roth. No income limit on conversions. Watch out for the pro-rata rule if you have existing pre-tax IRA balances.
Q: Does the 5-year rule matter?
A: For Roth earnings to be tax-free, the account must be open at least 5 years AND you must be 59½ (or meet an exception). Each conversion has its own 5-year clock.
Tool tie-in: Roth-vs-Traditional calculator — enter your current bracket and expected retirement bracket to see the winner in dollars.