Both a 401k and an IRA exist to help you build retirement savings with tax advantages — but they have different limits, rules, investment choices, and optimal uses. The question is not which is better in the abstract; it is which to fund in what order given your specific situation. Most people should use both. Here is how to decide.
What changed in 2026
- Contribution limits increased again. The IRS adjusts limits for inflation — for 2026, the 401k employee contribution limit is $23,500 (up from $23,000 in 2024), and the IRA limit holds at $7,000 with a $1,000 catch-up for 50+.
- Super catch-up provision took effect. SECURE 2.0 introduced an enhanced catch-up of $11,250 for 401k participants aged 60–63 in 2025, continuing into 2026.
- Roth 401k auto-enrollment expanded — more employers now offer Roth 401k and some plans auto-enroll at a Roth default. Know what your plan is doing by default.
- IRA income limits adjusted. Roth IRA phase-outs shifted upward; check the current limits before assuming you are above the income threshold.
Side-by-side comparison
| Feature |
401k |
Traditional IRA |
Roth IRA |
| 2026 contribution limit |
$23,500 ($34,750 age 60–63) |
$7,000 ($8,000 age 50+) |
$7,000 ($8,000 age 50+) |
| Employer match |
Yes |
No |
No |
| Tax on contributions |
Pre-tax (Traditional) or Roth |
Pre-tax (if deductible) |
Post-tax |
| Tax on withdrawals |
Ordinary income |
Ordinary income |
Tax-free |
| Investment options |
Plan-limited (typically 15–30 funds) |
Anything (stocks, ETFs, bonds) |
Anything |
| Early withdrawal penalty |
10% before 59½ |
10% before 59½ |
Contributions anytime; earnings 10% |
| RMDs |
Yes, starting age 73 |
Yes, starting age 73 |
No |
The order of operations
This is the framework most financial planners use and it holds in 2026:
- 401k up to the employer match. Free money. Capture 100% of it, always.
- HSA if you have a qualifying high-deductible health plan. Best tax treatment of any account — pre-tax in, tax-free growth, tax-free out for medical.
- Roth IRA to the max ($7,000). Tax-free growth for decades, no RMDs, Roth 401k conversion flexibility later.
- 401k to the annual limit ($23,500). Now you are getting the full space.
- Taxable brokerage. Only after tax-advantaged buckets are full.
Roth vs Traditional: the tax timing decision
| If you expect |
Choose |
| Higher tax rate now than in retirement |
Traditional — deduct now, pay later at lower rate |
| Higher tax rate in retirement than now |
Roth — pay now at lower rate, withdraw tax-free |
| Same rate now and later |
Roth — simplicity and no RMDs are worth a draw |
| Very high income (above Roth IRA limit) |
Backdoor Roth IRA or Traditional 401k |
Most younger workers in lower tax brackets benefit from Roth. High earners closer to retirement often benefit from Traditional. When genuinely uncertain, splitting between both is a practical hedge.
How to pick if you can only fund one
If budget forces a choice:
- Employer match exists? 401k to the match line, full stop.
- No employer match? IRA — more investment choices, often better fund options and lower expense ratios than a workplace plan.
- Income over Roth IRA limit? Traditional 401k or backdoor Roth IRA.
- Likely need funds before retirement? Roth IRA — contributions (not earnings) can be withdrawn penalty-free.
Common mistakes
Stopping at the match. The employer match is the floor, not the ceiling. After capturing it, the IRA and additional 401k space are both valuable.
Defaulting to whatever the 401k plan offers without checking fees. High-expense-ratio funds in a 401k can drag returns meaningfully over 30 years — know your fund options and their costs.
Ignoring the backdoor Roth. High earners above the Roth IRA income limit can still access Roth benefits via the backdoor Roth conversion — it requires a step but it is legal and widely used.
Treating an IRA as a bank account. Early withdrawal penalties and tax consequences are real — this money is for retirement.
Not contributing early in the year. Waiting until April to fund last year's IRA loses ~16 months of compounding for that contribution versus funding in January.
What to skip
- Cashing out a 401k when changing jobs. Roll it to an IRA or new employer plan — the tax and penalty hit is significant.
- "Set and forget" target-date funds without checking if the glide path matches your actual risk tolerance — they are good defaults, not perfect.
- Complex variable annuities inside an IRA. Layering insurance products inside a tax-advantaged account adds cost with minimal benefit.
FAQ
Can I contribute to both a 401k and an IRA in the same year?
Yes. They are separate accounts with separate limits. Most people with earned income can contribute to both.
What is the IRA income limit for 2026?
Roth IRA phase-out starts around $150,000 for single filers and ~$236,000 for married filing jointly (adjust for annual IRS inflation updates). Traditional IRA deductibility phases out if you have a workplace plan and exceed certain thresholds.
What if I leave my employer mid-year — do I lose the match?
Depends on the vesting schedule. Employer match may vest immediately, over 2 years, or on a 6-year graded schedule. Check your plan documents before leaving.
Can I have a Roth IRA and a Roth 401k?
Yes. They are different accounts. Roth 401k has no income limit; Roth IRA does. Both grow and withdraw tax-free.
Where to go next
See what is a 401k match in 2026, how to save for retirement self-employed in 2026, and how to catch up on retirement savings in 2026.