401(k) vs Roth IRA in 2026: where should my money go first?

It is one of the most common money questions in America: I can save for retirement in my workplace 401(k) or in a Roth IRA — so where should the next dollar go? The good news is that the answer is mostly a sequence, not an agonizing choice. A handful of rules, applied in the right order, will get the vast majority of people to a sensible plan in about ten minutes.

Let's walk through it the way you'd actually decide: capture free money first, understand the tax trade-off, check the limits, then follow a clean priority order.

Step 1: always grab the employer match first

If your employer matches 401(k) contributions, that match is the single best deal in personal finance. A common formula is "100% of the first 4% you contribute." That means for every dollar you put in (up to 4% of pay), your employer drops in another dollar — an instant 100% return before the market does anything at all.

No Roth IRA, index fund or savings account can reliably beat a guaranteed, immediate doubling of your money. So the first rule is simple: contribute at least enough to your 401(k) to get the full match. Leaving match on the table is the most expensive mistake savers make.

Step 2: understand traditional vs Roth (the tax timing)

Both 401(k)s and IRAs come in two tax flavors. The difference is simply when you pay income tax.

Simplified overview. Rules on deductibility, required distributions and eligibility have exceptions — confirm specifics for your situation.

The mental model: traditional saves you tax today; Roth saves you tax tomorrow. If you expect to be in a higher tax bracket in retirement — common for younger savers early in their careers — Roth's tax-free growth is especially attractive. If you're a high earner now expecting a lower bracket later, the upfront traditional deduction can win.

You don't have to predict the future perfectly. Many people deliberately hold some of each — "tax diversification" — so they have flexibility to manage their taxable income in retirement.

Not sure which way to lean? Our Roth vs traditional calculator lets you plug in your bracket today, your expected bracket later, and your time horizon to see the difference in plain numbers.

Step 3: know the contribution limits (and verify them)

The 401(k) and the IRA have separate annual limits, which is why you can fund both in the same year. There are three numbers worth knowing:

• 401(k) employee deferral limit — the most you can contribute from your own salary, generally much higher than the IRA limit.
• IRA limit — the combined cap across all your traditional and Roth IRAs for the year.
• Catch-up contributions — an extra allowance once you reach age 50, on top of the standard limits.

Step 4: a simple decision order

Put it all together and a clean priority list emerges. For most people, in most years, money is best deployed roughly in this order:

• 1. 401(k) up to the full employer match. Free money — never skip it.
• 2. Pay down high-interest debt (credit cards). A guaranteed 20%+ "return" beats almost any investment.
• 3. Build a small emergency fund so you don't have to raid retirement accounts.
• 4. Max a Roth IRA (if eligible) for tax-free growth and unmatched flexibility.
• 5. Return to the 401(k) and increase contributions toward the annual limit.
• 6. Taxable brokerage for anything beyond that.

Why the Roth IRA jumps ahead of the rest of the 401(k)? Because an IRA you open yourself usually offers a far wider, cheaper menu of investments than a typical employer plan, and Roth contributions (not earnings) can generally be withdrawn without penalty — a quiet safety valve. If your 401(k) is excellent and low-cost, it's perfectly reasonable to keep filling it instead.

A quick note for Muslim savers

If you're contributing to a 401(k) or IRA and want it to be Sharia-compliant, the account type isn't the issue — what matters is what the money is invested in inside it. Many plans now offer screened or self-directed options. Our guide on whether your 401(k) is halal walks through how to check your fund choices and what to do if the default options aren't suitable.

Frequently asked questions