Best Retirement Accounts in the US (2026): 401(k), IRA and Roth, in Order
Choosing the best retirement account is less about picking a provider and more about using the accounts in the right order. This guide covers the 2026 401(k) and IRA contribution limits, the Roth vs Traditional decision, and the one move that beats every other optimization.
The 2026 Contribution Limits
The IRS raised the limits for 2026. The numbers that matter:
- 401(k), 403(b), most 457 plans and the TSP: $24,500 (up from $23,500).
- 401(k) catch-up (age 50+): an extra $8,000 — and $11,250 for ages 60-63.
- IRA (Traditional or Roth): $7,500, plus a $1,100 catch-up at 50+.
- Roth IRA income phase-out: $153,000-$168,000 (single) and $242,000-$252,000 (married filing jointly).
New for 2026: if your prior-year wages with that employer exceeded $150,000, your catch-up contributions must be made on a Roth basis. Confirm current figures at the IRS.
The Order That Actually Matters
Most people overthink which fund to buy and underthink the order of accounts. A widely used priority:
- 1. 401(k) up to the full employer match. This is an immediate, guaranteed return on your money — nothing else in investing comes close.
- 2. Pay off high-interest debt. A 22% credit card beats any expected market return.
- 3. Max the IRA (Roth or Traditional, see below).
- 4. Go back and max the 401(k).
- 5. Taxable brokerage for anything beyond that.
If you leave the match on the table, no amount of fund selection makes up for it. Project the long-run result in our retirement calculator.
Roth vs Traditional: the Real Question
The choice comes down to one question: will your tax rate be higher now or in retirement?
Traditional gives you the deduction today and taxes withdrawals later — better if you are in a high bracket now and expect a lower one in retirement. Roth uses after-tax dollars and grows completely tax-free, withdrawals included — better if you are early in your career, in a lower bracket, or expect higher taxes later.
Roth also has practical advantages: contributions (not earnings) can be withdrawn at any time without penalty, and there are no required minimum distributions on a Roth IRA. Many people hold both to hedge the tax question.
Fees Matter More Than Fund Picking
Inside the account, what you hold matters — but the expense ratio matters more than most stock picks. The difference between a 0.03% index fund and a 1% actively managed fund can consume a large share of your lifetime returns.
Old 401(k)s from previous jobs are a common leak: they often sit in expensive default funds. Rolling them into an IRA usually gives you cheaper options and one place to manage. Run the fee impact in our compound interest calculator and read about the impact of fees.
How Much Do You Actually Need?
A common starting point is the 4% rule: multiply your expected annual retirement spending by about 25 to get a target portfolio. Spending $60,000 a year suggests roughly $1.5 million. It is a rule of thumb, not a guarantee — it assumes a diversified portfolio and a roughly 30-year horizon.
Another useful benchmark is your savings rate: the share of income you invest drives your timeline far more than your returns do. Test both in our FIRE calculator and see how the numbers move.
The Mistake That Beats Every Optimization
You can pick the perfect account and still fall short through the core mistake: starting late and contributing too little. Time is the one input you cannot buy back. Contributing from 25 versus 40 is not a small difference — it is often the difference between comfortable and cutting it close, because the early dollars compound the longest.
Also avoid cashing out a 401(k) when changing jobs: you pay tax plus a penalty and erase years of compounding. This article is educational content, not personalized financial or tax advice — verify current limits and rules with the IRS and a qualified professional. See the SEC's Investor.gov for neutral basics.