Roth IRA vs. 401(k): Which Should You Max First?

§ 01 — THE QUICK ANSWER The Default Priority Order

For most middle-income earners (combined household income roughly $60,000-$200,000), the priority sequence for retirement contributions is:

1. 401(k) up to the employer match. Whatever percentage your employer matches, contribute at least that much. Common matches are 50% of the first 6%, or 100% of the first 3-4%. Failing to capture the match is leaving free money on the table — typically $2,000-$6,000/year for the average worker.
2. Roth IRA to the annual limit. $7,000/year ($8,000 if you're 50 or older) in 2026. This is space that disappears if you don't use it — you cannot make up unused Roth IRA contribution room in later years.
3. HSA to the annual limit (if you have a high-deductible health plan). $4,300/year for individuals or $8,550 for families in 2026. Triple tax advantage: deductible going in, tax-free growth, and tax-free withdrawals for medical expenses.
4. Back to 401(k) up to the limit. $23,000/year in 2026 ($30,500 if 50+). Now you're filling the rest of the 401(k) beyond what you contributed for the match.
5. Taxable brokerage account. Once tax-advantaged accounts are full, taxable investing is the next stop.

This sequence is the default because it captures every dollar of free money first, then prioritizes accounts where contribution room is irreplaceable, then fills accounts where you can always contribute more later. The logic is robust across most income levels and tax situations.

§ 02 — WHY THE MATCH COMES FIRST Why the Match Comes First Always

Employer matching contributions are the highest-return investment available to ordinary workers. A 100% match is an instant 100% return on the matched contribution — before any market gains. Even a 50% match (50¢ for every $1 you contribute up to the limit) provides a 50% instant return.

For perspective: the stock market has historically returned about 10% per year nominally, or 7% after inflation. A 401(k) match is a 50-100% return in the moment you contribute. There is no other instrument available to a typical worker that produces returns of this magnitude with zero risk and zero waiting period.

The most common reason workers fail to capture their full match is that they don't contribute enough to qualify. If your employer matches 100% of the first 4% you contribute, but you're only contributing 2%, you're leaving 2% of your salary on the table — every paycheck, forever, until you fix it.

Capture the full match before any other retirement contribution. There is no scenario where this is wrong.

§ 03 — WHY ROTH COMES NEXT Why Roth IRA Usually Comes Next

After capturing the match, the next priority is the Roth IRA. Three reasons:

1. The contribution room is irreplaceable

Each year you don't use your Roth IRA contribution room, it disappears. You cannot contribute extra in a later year to make up for missed years. A 30-year-old who skips Roth contributions for 5 years to "catch up later" has permanently lost roughly $35,000 of contribution opportunity, plus 30 years of compound growth on those contributions — a six-figure loss in retirement value.

2. Tax-free growth is a long-term advantage

Roth contributions go in after-tax, but every dollar of growth from that point is tax-free at withdrawal. Traditional 401(k) contributions go in pre-tax, but the entire withdrawal — original contribution plus all growth — is taxed as ordinary income. Over 30+ years, the tax-free growth on a Roth dramatically outpaces the upfront tax deduction on a Traditional account, especially if you expect to be in a similar or higher tax bracket in retirement.

3. Roth contributions can be withdrawn anytime

Original contributions to a Roth IRA (not earnings) can be withdrawn at any time, tax-free and penalty-free, for any reason. This makes the Roth uniquely flexible — it functions as both retirement savings and a backup emergency fund. No other tax-advantaged account offers this.

The exception: if you're in a very high tax bracket today (32% federal or higher) and confident you'll be in a lower bracket in retirement, the math may favor Traditional contributions instead. More on this below.

§ 04 — WHEN ORDER CHANGES When the Order Should Change

The default sequence works for most people but isn't universal. Three situations where it shifts:

If your employer doesn't match

Without a match, the 401(k) loses its instant-return advantage. Many financial planners recommend Roth IRA first, then 401(k). The 401(k) often has worse fund options than a self-directed Roth IRA, so getting the Roth filled first ensures your highest-quality account is fully utilized.

If you're a very high earner

Above $161,000 single / $240,000 married, you can't directly contribute to a Roth IRA. Two paths: use the backdoor Roth strategy (contribute to Traditional IRA, immediately convert to Roth) or skip Roth IRA contributions and prioritize Traditional 401(k), then taxable brokerage. The backdoor Roth is mechanically simple but requires care if you have any existing Traditional IRA balances (look up the pro-rata rule).

For very high earners (32%+ federal bracket), Traditional 401(k) contributions provide a more valuable upfront tax deduction than Roth. Maxing Traditional first, then doing backdoor Roth as a secondary priority, often produces better lifetime tax outcomes.

If you have an HSA available

The HSA's triple-tax-advantaged status (deductible going in, growth tax-free, withdrawals tax-free for medical) makes it arguably the best retirement account available — particularly for healthy people who can pay current medical expenses out of pocket and let the HSA grow untouched. Some planners argue HSA should rank above Roth IRA in the priority order. The case is strong if you have low current healthcare needs and a long horizon.

If you have unusually high current tax burden

State income tax matters too. A worker in California or New York at the top combined federal+state bracket faces close to 50% marginal rates. Traditional 401(k) deductions provide a 50¢-on-the-dollar discount. The Roth case weakens significantly at these levels.

§ 05 — THE TAX MATH The Tax Math, Honestly

The Roth-vs-Traditional debate has been argued for thirty years because the math depends on assumptions about future tax rates, which nobody can predict reliably. Here's the actual framework.

If your marginal tax rate today equals your marginal tax rate in retirement, Roth and Traditional produce mathematically identical outcomes. The Roth pays tax now on a smaller amount; the Traditional pays tax later on a larger (compounded) amount. The same percentage of either becomes spendable money in retirement.

If your tax rate today is lower than in retirement, Roth wins. You pay the lower rate now and avoid the higher rate later.

If your tax rate today is higher than in retirement, Traditional wins. You skip the higher rate now and pay the lower rate later.

So which is more likely? For most earners, the answer is "your tax rate will probably be similar or higher in retirement," for several reasons:

• Current tax rates are historically low. The 2017 Tax Cuts and Jobs Act lowered most federal rates. They're scheduled to revert to higher 2017 levels at the end of 2025 unless Congress extends them. Future rates may well be higher than today.
• Standard deduction may shrink. The 2017 law also doubled the standard deduction. If that reverts, more income becomes taxable.
• Required Minimum Distributions force taxable withdrawals. Traditional accounts force withdrawals starting at age 73. These can push retirees into higher brackets even when their actual spending is modest.
• Social Security taxation. Higher Traditional withdrawals increase the percentage of Social Security that's federally taxable, creating a hidden bracket.
• Medicare premiums. Higher taxable income raises Medicare Part B and D premiums through IRMAA surcharges. Roth withdrawals don't count toward IRMAA.

For a typical middle-income earner today, Roth is the safer bet on the margin. For very high earners (32%+ marginal bracket), Traditional usually still wins on pure math, but both should be used in combination.

§ 06 — COMMON MISTAKES Common Mistakes in Account Prioritization

• Maxing 401(k) before Roth IRA. Common mistake driven by the convenience of payroll deduction. Worker contributes $23,000 to 401(k), feels good about maxing it, never opens a Roth IRA. Has now permanently lost that year's $7,000 of Roth contribution room.
• Not capturing the full match. Most often happens when workers contribute a flat dollar amount (e.g., $200/paycheck) instead of a percentage of salary. After raises, the dollar amount falls below the match threshold without the worker noticing.
• Skipping the HSA when eligible. Many workers with high-deductible health plans ignore the HSA option entirely or use it only as a current-year medical spending account. The investment-and-grow strategy can produce $200K-$500K of tax-free retirement medical funds over a career.
• Avoiding the backdoor Roth. High earners who could use the backdoor Roth often don't because they think it's complicated. It's a 10-minute process at major brokerages once a year. The lifetime tax savings are substantial.
• Investing the 401(k) too conservatively. Many workers default into "target date" funds with high expense ratios or stable-value funds with low returns. Spending an hour reviewing your 401(k) options and choosing low-cost index funds is one of the highest-return uses of time available in personal finance.

§ 07 — BOTTOM LINE The Bottom Line

For most middle-income earners, the order is: 401(k) up to the match, then Roth IRA to the limit, then HSA to the limit (if eligible), then back to 401(k) to the full limit, then taxable. This sequence captures every dollar of free money, fills the most flexible and irreplaceable accounts first, and leaves the most flexible-but-replaceable accounts for last.

For very high earners, Traditional 401(k) contributions deserve more weight because of the immediate tax deduction. The backdoor Roth strategy maintains access to Roth space despite income limits.

Whatever order you use, the most important variable is the total savings rate. Optimizing the order of $5,000/year of contributions matters less than increasing the total to $15,000/year. Get the priority right, then put attention on the bigger lever — how much you're saving overall.