Roth IRA vs 401(k): Where Should Your Money Go First?
Both accounts let your investments grow tax-advantaged. The difference is when you pay taxes — and that determines which is better for you.
The Key Difference: When You Pay Tax
Traditional 401(k) / Traditional IRA:
- Contribute pre-tax → pay income tax when you withdraw in retirement
- Better if you're in a higher tax bracket now than you'll be in retirement
Roth IRA / Roth 401(k):
- Contribute after-tax → everything grows and withdraws tax-free
- Better if you're in a lower tax bracket now than you'll be in retirement
2026 Contribution Limits
| Account | 2026 Limit | Catch-Up (50+) |
|---|---|---|
| 401(k) (traditional or Roth) | $23,500 | +$7,500 = $31,000 |
| IRA (traditional or Roth) | $7,000 | +$1,000 = $8,000 |
| Total (if both available) | $30,500 | $39,000 |
Roth IRA Income Limits (2026)
| Filing Status | Full Contribution | Phase-Out | Ineligible |
|---|---|---|---|
| Single | Under $150,000 | $150,000–$165,000 | Over $165,000 |
| Married Filing Jointly | Under $236,000 | $236,000–$246,000 | Over $246,000 |
If you exceed the Roth income limit, you can still use the Backdoor Roth IRA strategy (contribute to a non-deductible traditional IRA, then convert to Roth).
The Optimal Contribution Order
This order maximizes every dollar:
1. 401(k) up to employer match This is the highest guaranteed return available to most people. If your employer matches 50% of contributions up to 6% of salary, and you earn $70,000, that's $2,100 in free money per year. Never leave it on the table.
2. Roth IRA (max it out: $7,000) After capturing the match, the Roth IRA is typically the best next move for most workers under ~$150,000 income. Tax-free growth for 30+ years is enormously valuable.
3. 401(k) beyond the match Fill up the remaining 401(k) space ($23,500 − employer match contributions). Still tax-advantaged, even without the free money boost.
4. HSA (if eligible) Often overlooked, but the HSA has a triple tax advantage unmatched by any other account.
5. Taxable brokerage No tax advantages, but no limits either. Use index funds and hold long-term for tax efficiency.
Should You Choose Traditional or Roth?
The mathematically correct answer depends on whether your tax rate is higher now or in retirement. Since no one knows future tax rates with certainty, diversification across both is often wise.
Lean Roth if:
- You're early in your career (lower income now, likely higher later)
- You expect tax rates to rise in the future
- You want flexibility (Roth contributions can be withdrawn anytime without penalty)
- You have no other source of tax-free income in retirement
Lean Traditional if:
- You're in a high tax bracket now (32%+)
- You expect significantly lower income in retirement
- You need the current tax deduction to make retirement saving feasible
- You live in a high-tax state and expect to retire in a low-tax state
The answer for most people in the 22–24% bracket: Do both. Traditional 401(k) to lower current-year taxes + Roth IRA for tax-free retirement income.
The Power of Tax-Free Roth Growth
Roth growth is tax-free forever. This becomes more valuable over longer time periods.
Example: $7,000 invested at age 25 in a Roth IRA at 9% annual return:
- Age 40: ~$25,500 — entirely tax-free
- Age 55: ~$88,000 — entirely tax-free
- Age 65: ~$208,000 — entirely tax-free
In a traditional IRA/401(k), that $208,000 would be fully taxable on withdrawal.
If you're in the 22% bracket in retirement, the Roth advantage on this single $7,000 contribution is: $208,000 × 22% = $45,760 in tax savings
This is why Roth accounts are considered so valuable — especially when started young.
Roth 401(k): Best of Both Worlds?
Many employers now offer a Roth 401(k) — the higher contribution limits of a 401(k) ($23,500) with the tax-free withdrawal benefit of a Roth IRA.
The Roth 401(k) has no income limits — high earners who don't qualify for a Roth IRA can use the Roth 401(k) directly.
Downside: Roth 401(k) requires minimum distributions (RMDs) starting at age 73 (can be solved by rolling over to a Roth IRA before then).
401(k) Withdrawal Rules
Traditional 401(k):
- Withdrawals before 59½: 10% penalty + income tax
- After 59½: income tax only (no penalty)
- Required minimum distributions start at age 73
Roth 401(k):
- Qualified withdrawals (age 59½+, account 5+ years): completely tax-free
- Contributions (not earnings) can sometimes be withdrawn early
72(t) / SEPP Rule: Allows penalty-free early withdrawals from retirement accounts using a fixed schedule calculated by IRS formulas. Useful for early retirees.
Roth IRA Withdrawal Rules (More Flexible)
The Roth IRA has the most flexible withdrawal rules of any retirement account:
- Contributions (the money you put in) can be withdrawn at any time, for any reason, tax and penalty-free
- Earnings are tax and penalty-free after age 59½ AND the account has been open for 5+ years
This makes the Roth IRA function as an emergency fund of last resort — you'd prefer not to touch it, but you can if absolutely necessary.
Frequently Asked Questions
I'm self-employed — what are my options? The Solo 401(k) is the most powerful tool for self-employed individuals. You can contribute as both "employee" (up to $23,500) and "employer" (up to 25% of net self-employment income), for a total of up to $70,000 in 2026. It also has a Roth option.
Can I have both a 401(k) and a Roth IRA? Yes, and you should if you can. They have separate limits. Contributing to a 401(k) doesn't reduce your Roth IRA eligibility (only income limits apply to the Roth IRA).
What if I change jobs — what happens to my 401(k)? You can leave it at the old employer (if balance > $5,000), roll it over to your new employer's 401(k), or roll it to an IRA. Rolling to an IRA gives you more investment choices and consolidates accounts.
I'm 40 with very little saved — is it too late? Not at all. Catch-up contributions start at 50 ($7,500 extra in 401(k)). Maxing out a 401(k) from age 40–65 at 9% return: ~$2.1M. The best time to start was 20 years ago; the second best time is today.