Why Maxing Your 401k Before Your IRA Might Be Costing You Money

The default advice on contribution order goes like this: first, contribute to your 401k up to the employer match. Then max your IRA. Then go back and max your 401k. The reasoning is sound — the match is free money, IRA fund options are usually better than 401k menus, and only then does the 401k get the rest.

But a lot of people skip step two. They either forget about the IRA or assume that maxing the 401k first is the simpler and roughly equivalent choice. For some people that is fine. For others it is a meaningful mistake.

The gap between the two strategies is not about tax treatment in isolation — it is about investment quality, flexibility, and what your specific 401k plan actually offers. Here is how to think through it.

Why the Match Always Comes First

This part is not debatable. If your employer matches 4% of your salary and you contribute 4%, you just earned a 100% instant return on that portion of your money. No investment in existence offers that. Contributing less than the full match is leaving compensation on the table.

The match is not a retirement account optimization question — it is a salary negotiation question. You already earned it. You just have to collect it.

Everything after this point assumes you are already contributing enough to capture the full match. If you are not, stop here and fix that first.

The Case for Funding the IRA Before Going Further in the 401k

Once you have the match, the question is whether the next dollar goes into the 401k or the IRA. The standard answer — IRA next — rests on a few real advantages.

Investment selection. Most 401k plans offer a limited menu of funds, often with higher expense ratios than what you can access in an IRA at Fidelity, Vanguard, or Schwab. Even a 0.30% difference in annual fees compounds significantly over 20 or 30 years. On a $200,000 balance, 0.30% extra in fees costs roughly $60,000 over 30 years at 7% return. That is not a rounding error.

Roth availability. Most people under 50 with moderate incomes are eligible to contribute to a Roth IRA. A Roth IRA grows tax-free and withdrawals in retirement are tax-free. Many 401k plans do not offer a Roth option, or if they do, it is not always the right choice given plan fees. The Roth IRA is one of the most tax-efficient accounts available to individual investors, and you only get $7,000 per year to use it. The full Roth vs traditional breakdown is in Roth vs traditional IRA and 401k.

Flexibility. IRA contributions (not earnings) can be withdrawn penalty-free at any time. This gives you a layer of accessible savings if something goes wrong before retirement. 401k early withdrawals come with a 10% penalty plus ordinary income tax. The IRA offers optionality the 401k does not.

When Maxing the 401k First Actually Makes Sense

The IRA-first logic is not universal. There are real situations where going back to the 401k before funding the IRA is the right call.

Your 401k plan is genuinely good. Some employer plans — particularly at large companies — offer institutional share classes with expense ratios below 0.05%. If your 401k has index funds cheaper than anything in your IRA, the fee argument flips. A high-quality low-cost 401k is better than a mediocre IRA.

You are in a high tax bracket now and expect lower income in retirement. Traditional 401k contributions reduce your taxable income today. If you are in the 32% or 37% bracket, every dollar of traditional 401k contribution saves you $0.32 to $0.37 in taxes right now. The deduction is worth more at higher incomes, which can outweigh IRA advantages.

You earn too much for a Roth IRA. In 2026, Roth IRA eligibility phases out for single filers above $150,000 and married filers above $236,000. If you are above those thresholds, the Roth IRA comparison becomes moot — you are looking at a traditional IRA, where the deductibility depends on whether you have a workplace plan. At higher incomes with a workplace plan, the traditional IRA deduction phases out too, leaving you with a non-deductible IRA. At that point the 401k is often the better vehicle.

You need the higher contribution limit. The 401k limit in 2026 is $24,500 ($32,500 with catch-up at 50). The IRA limit is $7,000. If you are trying to save aggressively, the 401k has nearly four times the capacity. For high earners focused on maximizing tax-advantaged space, the IRA alone is not enough.

The Match Percentage Changes the Whole Calculation

Here is something most contribution order discussions gloss over: the size and structure of the match affects how much the IRA-first strategy actually matters.

If your employer matches 3% of salary, capturing the match requires a 3% contribution. After that, you have the full IRA contribution room — $7,000 — before going back to the 401k. The gap between the match capture point and the IRA max is where the IRA-first logic applies.

If your employer matches dollar-for-dollar up to 6%, you are already contributing 6% of salary just to get the match. On a $100,000 salary, that is $6,000 of your own contributions. You still have $1,000 in annual 401k headroom before hitting the IRA contribution territory, but the match itself was already doing a lot of the work.

The point is not to calculate this precisely in your head — it is to recognize that "should I fund the IRA before going further in the 401k" has a different answer depending on your match structure, your plan quality, your tax bracket, and your income. Generic advice skips all of that. One account often left out of this conversation entirely is the HSA — which has a case for coming before the IRA for people on eligible health plans. The HSA as a stealth IRA covers why it deserves a spot in the priority order.

The Roth vs Traditional Decision Adds Another Layer

The IRA-first argument is strongest when you are comparing a Roth IRA against a traditional 401k. That comparison involves different tax timing: the Roth IRA gives you tax-free growth and withdrawals, while the traditional 401k gives you a tax deduction now but taxable withdrawals later.

For someone in their 20s or 30s in a moderate tax bracket who expects to be in a similar or higher bracket in retirement, the Roth IRA often wins on flexibility and long-run tax efficiency even if the 401k plan fees are somewhat higher.

For someone in their 50s in a high bracket who expects significantly lower income in retirement, the traditional 401k deduction may be worth more than the Roth's future tax-free treatment.

Most people do not need to get this perfectly right. But understanding that contribution order, tax treatment, and plan quality are all connected — rather than treating "max the 401k first" as a universal rule — will lead to better decisions over a 30-year savings horizon.

A Practical Order to Follow

For most people in a moderate tax bracket with a typical employer plan, this sequence makes sense:

First, contribute to your 401k up to the full employer match. Do not leave this on the table under any circumstances.

Second, max your IRA — Roth if you are eligible, traditional if you are not. The $7,000 annual limit is small relative to what you can eventually save, but it represents years of tax-advantaged Roth space you cannot recover if you skip it.

Third, go back and contribute more to your 401k, up to the annual limit. At this point you have covered the match and used the IRA — additional 401k contributions are still tax-advantaged and meaningful, just with the limitations of your plan's fund menu.

Fourth, if you have maxed both and still have money to invest, a taxable brokerage account gives you flexibility and no contribution limits, at the cost of annual taxes on dividends and capital gains.

How Much Does Contribution Order Actually Matter?

For most people contributing reasonable amounts at moderate incomes, the difference between IRA-first and 401k-first is real but not enormous over a 30-year horizon. The bigger variables are how much you save in total, when you start, and your return rate.

Where contribution order does matter meaningfully is in plans with high fees. A 401k with a 0.80% expense ratio on its fund options versus an IRA with a 0.04% index fund is a 0.76% annual drag on that portion of your savings. On $100,000, that is $760 per year in extra fees. On $400,000 it is over $3,000 per year. That compounds, and it adds up to real money over a career.

The practical move is to check your 401k's actual fund options and expense ratios, compare them to what is available in an IRA, and make the decision based on your specific plan rather than on generic advice. That takes about 15 minutes and the answer will be clear.

You can model both scenarios — IRA-first versus 401k-first — at NumberToRetire.com by adjusting the contribution inputs for each account and comparing the projected balances. The per-account return rate override lets you enter different assumed returns to reflect the fee difference between your specific plan and an IRA, which gives you a more accurate projection than assuming both earn the same return.