401k vs Roth IRA: Complete 2026 Comparison
Option A
401(k)
Option B
Roth IRA
Both a 401(k) and a Roth IRA are powerful retirement savings vehicles — but they serve different purposes and come with different rules. Many people can and should use both. The strategic question is which to prioritize when you have limited dollars to invest.
The answer depends on your income, tax bracket, employer match availability, time horizon, and expectations about future tax rates.
Head-to-Head Comparison
| Feature | 401(k) | Roth IRA |
|---|---|---|
| 2026 Contribution Limit | $23,500 ($31,000 age 50+) | $7,000 ($8,000 age 50+) |
| Tax on Contributions | Pre-tax (reduces current income) | After-tax (no deduction) |
| Tax on Withdrawals | Taxed as ordinary income | Tax-free (qualified distributions) |
| Employer Match | Yes — up to 6% is common | No employer match |
| Income Limits | None | Phases out at $150K–$165K (single) |
| Required Minimum Distributions | Yes, starting at age 73 | None during lifetime |
| Early Withdrawal Penalty | 10% before age 59.5 | 10% on earnings only (not contributions) |
| Investment Options | Limited to plan menu | Unlimited — any brokerage |
| Best For | High earners, employer match | Tax-free growth, flexible access |
The Optimal Priority Order
1. Contribute enough to 401k to capture the full employer match — this is a 50–100% instant return and should never be skipped.
2. Max out your Roth IRA (if income eligible) — $7,000 of after-tax money grows completely tax-free forever.
3. Return to the 401k and max out the remaining contribution room ($23,500 – what you already contributed for the match).
4. If you have additional savings capacity, consider taxable brokerage accounts or HSA (if eligible).
Backdoor Roth for High Earners
If your income exceeds the Roth IRA limits, you can use the "Backdoor Roth" strategy: make a non-deductible Traditional IRA contribution, then immediately convert it to a Roth IRA. This is legal and commonly used by high earners. Caution: the pro-rata rule applies if you have other pre-tax IRA balances.
The Verdict
Winner: Both — use them together strategically
Always capture the employer 401k match first. Then max the Roth IRA for tax-free growth and flexibility. Then return to the 401k. If income exceeds Roth limits, use the Backdoor Roth or Roth 401k option.
- Employer match makes the 401k unbeatable for matched dollars
- Roth IRA wins for tax-free growth, no RMDs, and estate planning
- The Roth 401k option (offered by many plans) provides Roth tax treatment with 401k limits
- Expected future tax rates should inform which pre-tax vs Roth split is optimal