Roth IRA vs 401(k): Which One Should You Fund First?

TL;DR — Roth IRA vs 401(k) isn't an either/or pick. The accounts do different jobs, and the order that wins for most people is: 401(k) up to the full employer match, then a Roth IRA up to its limit, then back into the 401(k). The match is a guaranteed instant return nothing else offers; the Roth adds tax-free growth and flexibility the 401(k) can't.

The fork shows up the moment you get serious about retirement: payroll needs a percentage, the broker needs a deposit. Direct answer: if your employer matches any part of your 401(k) contributions, put your first dollars there — at least enough to capture the full match — because a match is an instant 50–100% return before the market moves a single dollar. After the match, a Roth IRA usually beats more 401(k) for your next dollars. And whichever account you fund, the contribution has to actually leave your checking account every month — that's the budget's job, not the account's. Vault — a free budgeting app that shows your real monthly surplus without asking for a bank login — turns "save more for retirement" into a fixed line in the plan instead of a hope.

Vanguard's How America Saves 2025 report found the average 401(k) participant deferred 7.7% of pay in 2024 — an all-time high — and saved about 11.7% once employer matches were counted. Real progress, but still short of the 15%-of-income pace (match included) that most retirement milestones are built on. The accounts you choose matter; the monthly surplus that feeds them matters more.

Roth IRA vs 401(k): what's actually different?

A 401(k) is a retirement plan run through your employer and funded from payroll, while a Roth IRA is an individual account you open yourself and fund with after-tax money. The 401(k) trades a tax break today for taxes later; the Roth IRA pays taxes now so withdrawals in retirement are tax-free. That one difference drives most of the comparison:

Two rows in that table do most of the work. The employer match exists only in the 401(k) — it's the closest thing to free money in personal finance, and passing it up to fund an IRA first is the most common (and most expensive) ordering mistake. And the Roth IRA's flexibility is structural: since you already paid tax on every dollar that goes in, you can pull your contributions — not the earnings — back out anytime without tax or penalty, which lets the account double as a deep backup reserve.

Which should you prioritize: the 401(k) or the Roth IRA?

Contribute to the 401(k) up to the full employer match, send your next dollars to a Roth IRA, and return to the 401(k) only after the Roth is maxed. That order survives nearly every income and tax situation, because each step captures something the one before it can't: the match, then tax-free growth, then volume.

The full order:

1. 401(k) up to the full match. If your employer matches 50% of contributions up to 6% of pay, every dollar within that 6% earns an instant 50% return the day it lands. Nothing else in investing offers a guaranteed return like that. Contribute less and you're declining part of your own compensation.
2. Roth IRA up to the limit. $7,500 for 2026 ($8,600 if you're 50 or older). These dollars buy tax-free growth for decades, no required withdrawals, an unrestricted investment menu, and the right to reclaim your contributions if life goes sideways. Early-career savers get an extra edge: you lock in today's tax rate, likely the lowest you'll ever see.
3. Back to the 401(k). Only after the Roth is full does the 401(k) retake the lead — payroll convenience and pre-tax growth up to the $24,500 limit ($32,500 if you're 50+), with the pre-tax break softening the hit to take-home pay.
4. Then a taxable brokerage account. Past both limits, a plain brokerage account keeps compounding with no ceiling — less tax-advantaged, but unlimited.

Here's the order on a $75,000 salary with a 50%-match-on-6% plan:

When to bend the order

That sequence is the default, not a law:

• You're early in your career. A low bracket now makes Roth treatment unusually cheap — worth favoring even beyond the IRA if your plan offers a Roth 401(k).
• You're in your peak earning years. The pre-tax 401(k) deduction is worth the most when your bracket is highest; heavy earners often run the order match → max 401(k) → Roth IRA.
• Your income is above the Roth limits. The 2026 phase-out runs from $153,000 to $168,000 single and $242,000 to $252,000 married filing jointly. Above those lines the 401(k) doesn't care what you earn; some filers use a "backdoor" Roth conversion instead — worth a chat with a tax pro.
• Your employer offers no match. With nothing to capture, the Roth IRA's flexibility and menu usually make it the better first stop; the self-employed have their own accounts (SEP IRAs, Solo 401(k)s) with higher limits.

This is where the account choice hands off to the budget. A retirement contribution is a monthly bill you send to your future self, and bills you can see are bills that get paid. In Vault, retirement gets its own envelope sitting next to groceries and the emergency fund — funded on payday, before spending gets a vote, which is the core of paying yourself first. The reports view shows your true monthly surplus, so the contribution number comes from evidence instead of optimism — the same math behind how much to save each month — and because Vault syncs across devices, the plan you build at the kitchen table is the one you check after a raise.

How much can you contribute in 2026?

The IRS adjusts the limits most years. For 2026:

Every edge case lives on the IRS 401(k) contribution-limits page and its IRA pages. Two rules people trip on: the IRA limit covers your traditional and Roth IRAs combined — $7,500 is the total, not $7,500 each — and Roth IRA eligibility is income-tested, while 401(k) contributions never are.

Common mistakes to avoid

• Stopping at the match. The match is the floor, not the finish line. The benchmark is about 15% of income including the match; the average saver is nearer 11.7%.
• Funding the IRA before capturing the full match. A great Roth IRA growing at 8% a year loses to a matched 401(k) dollar earning an instant 50–100%. Order matters more than fund picking.
• Withdrawing Roth earnings early. Contributions come out free; earnings pulled out before age 59½ and before the five-year rule is met owe taxes and a 10% penalty. Know which dollars are which.
• Over-contributing past the income limits. Roth contributions above the phase-out owe a penalty for every year they sit there — fixable, but the clean move is correcting it before the tax deadline.
• Letting the rate go stale. A contribution set once and forgotten quietly loses ground to every raise. Bump it 1% a year, or let your plan's auto-escalation do it.

Frequently asked questions

Can I have a Roth IRA and a 401(k) at the same time?

Yes — they're independent accounts with independent limits. You can defer $24,500 into a 401(k) and still put $7,500 into a Roth IRA in the same year; many people do exactly that, in the match → Roth → 401(k) order.

Is a Roth IRA better than a 401(k)?

Neither is better across the board. The 401(k) wins on the employer match and higher limits; the Roth IRA wins on tax-free withdrawals, flexibility, investment choice, and no required distributions. Using both, in the right order, beats picking a favorite.

How much should I put in my 401(k) vs my Roth IRA?

At minimum, enough into the 401(k) to capture the full match. Then aim for a total pace of 12–15% of income across both accounts — for example, 6% to the match plus $500 a month into the Roth on a $75,000 salary.

Does a Roth IRA have required minimum distributions?

No. A Roth IRA never forces withdrawals in the owner's lifetime — the money can compound untouched and pass to your heirs. 401(k) balances must start being drawn down at 73 under current law.

What if I earn too much for a Roth IRA?

Contribute to the 401(k) regardless — it has no income cap — and look into the backdoor Roth: fund a traditional IRA, then convert it. It's legal and common, but the tax mechanics deserve a professional's eyes first.

The bottom line

Roth IRA vs 401(k) is a question of order, not allegiance: capture the match, fill the Roth, return to the 401(k), let a taxable account take the overflow. The accounts are destinations; the engine is the monthly surplus you send them — a budget question before an investing one.

See the surplus that funds your future — start your retirement envelope in Vault.