403(b) vs Roth IRA: The Order of Operations

The 403(b) and the Roth IRA are not competitors. They are two buckets with different plumbing. The 403(b) is the bucket your employer pours into alongside you; the Roth IRA is the bucket you control completely, including what it invests in and what it costs. The question is never "which one." It is "which dollar goes where first."

If your real question is how a 403(b) differs from a 401(k), that is its own page: 403(b) vs 401(k). If you are choosing between a Roth 403(b) and a Roth IRA, that comparison lives at Roth 401(k) vs Roth IRA and the logic carries over.

Here is the entire first decision in one number: 100%. A dollar-for-dollar match doubles your money the day it posts. A 50% match pays you 50% instantly. No fund on your 403(b) menu, however overpriced, charges enough to erase that. The fee arithmetic proving this is below, so this claim is earned, not just asserted.

A typical match formula looks like 100% of the first 3% of pay, or 50% of the first 6%. Leaving match on the table is a permanent pay cut you volunteered for.

With a Roth IRA, you pick the custodian and the funds, total-market index funds at near-zero cost are the common choice. Contributions come out tax-free and penalty-free anytime. Qualified growth comes out tax-free in retirement. And Roth IRAs have no lifetime required minimum distributions for the owner.

The catch for higher earners: direct Roth IRA contributions phase out with income. Single filers phase out between $153,000 and $168,000 of MAGI for 2026, and married filing jointly phases out between $242,000 and $252,000. Above the range, the answer is the backdoor Roth IRA, covered in our backdoor Roth guide, with the pro-rata rule as the thing to check before you start.

Many 403(b) plans now offer a Roth option inside the plan. That is a different comparison, a Roth account at work versus a Roth IRA on your own, and we cover it at Roth 401(k) vs Roth IRA. The analysis applies to Roth 403(b)s the same way.

403(b) plans grew up in a different regulatory neighborhood than 401(k)s. A lot of them, especially in K-12 schools and some hospital systems, are still stocked with annuity contracts carrying 1% to 2%-plus in annual costs and surrender charges if you leave early. An annuity inside a retirement account is paying for tax deferral you already had. Some 403(b) menus are excellent and index-cheap. Read your fee disclosure before you assume either.

Two honest conclusions follow, stated as rules:

1. Even a bad 403(b) is worth funding to the match. A 100% match is plus 100% on day one; a 1.5% annual fee costs 1.5% per year. The fee needs decades to eat what the match paid instantly, and you can often roll the balance to an IRA or a better plan after leaving the employer.
2. Beyond the match, the marginal dollar may belong in the Roth IRA first, precisely because you control the costs there. This is why the Roth IRA is step 2 in the order, and why step 3 (back to the 403(b)) carries the menu caveat.

Escape hatches worth checking without a deep dive: ask HR whether the plan has a low-cost custodial (mutual fund) option next to the annuity vendors, whether a 457(b) with a better menu exists alongside it, and what the surrender schedule is before moving existing money.

Take a hypothetical nurse practitioner, Dana, earning $130,000 at a hospital system. The 403(b) matches 100% of the first 3% of pay, and the fund menu is mostly annuity products averaging about 1.4% in annual costs, with one passable balanced fund. Dana can save $20,000 this year. Here is the dollar-by-dollar order, all figures hypothetical and illustrative, results vary:

Step 1, first $3,900: 3% of $130,000 into the 403(b). The employer adds $3,900. Dana turned $3,900 into $7,800 before the market did anything. Even at a 1.4% fee, the drag on that balance in year one is about $109. Paying $109 to collect $3,900 is not a close call.

Step 2, next $7,500: Roth IRA at a low-cost custodian in a total-market index fund. At $130,000 single, Dana is under the Roth IRA phase-out, which starts at $153,000 of MAGI for 2026. If she were inside the phase-out range instead, the contribution would be reduced and the backdoor Roth would clean up the rest (see our backdoor Roth guide).

Step 3, the remaining $8,600: the judgment call. Pre-tax 403(b) dollars save income tax now at Dana's marginal rate. Illustrative: at a 24% marginal rate, $8,600 deferred saves about $2,064 of current-year tax, but the money rides in a 1.4% wrapper until she changes jobs and can roll it out. Run the tenure question: if Dana expects to leave within a few years, the deferral plus a later rollover usually wins. If she is a career employee in a bad menu with no cheap option, a taxable brokerage account in index funds can be the honest competitor for dollars beyond the match and the Roth IRA.

This is the step where personal facts decide it: tenure, menu, bracket, and what's coming next year. It is a planning conversation, not a rule, and it is exactly what a retirement planning engagement is for.

Recap: $3,900 403(b) match + $7,500 Roth IRA + $8,600 remainder by menu quality = $20,000 deployed in the right order. Dana is a composite hypothetical; results vary.

Resident or fellow (roughly $60,000 to $75,000): usually well under the Roth IRA phase-out, so direct Roth IRA contributions work. A low current bracket also makes Roth-type dollars relatively attractive. If the hospital 403(b) has a Roth option, that decision lives at Roth 401(k) vs Roth IRA. The pre-tax versus Roth tradeoff itself is covered in depth at traditional vs Roth 401(k). Watch vesting if the program ends in two or three years.

New attending (income jumps to $300,000-plus): the direct Roth IRA door usually closes. The answer becomes the backdoor Roth IRA, and the pro-rata rule now matters, because old rollover IRAs can complicate the conversion math. The transition year, part resident income and part attending income, is exactly when people get the phase-out wrong. MAGI for the full year controls, not your salary on any single day.

Mid-career, multiple employers: a hospital 403(b) plus a side 1099 income source, moonlighting or locums, opens a solo 401(k) on the self-employment income. The shared limits between the two plans need care: a 403(b) is treated as participant-controlled for this purpose, so its contributions can share one combined annual-additions limit with a solo 401(k) the same person controls through their own business. In practice this often does not bind unless employer 403(b) contributions are large relative to the moonlighting income, but it is worth checking, not assuming away.

The resident-to-attending arc, and getting the Roth IRA and backdoor timing right around it, is exactly the kind of judgment call our CPA for physicians engagement handles.

This page is for hospital-employed physicians and nurses, university and K-12 staff, and nonprofit employees with a 403(b) and savings capacity beyond the match. It also fits residents and fellows setting the habit early, new attendings whose income just crossed the Roth IRA line, and household CFOs deciding allocation for a spouse's 403(b).

You do NOT need this page if your employer offers no match and you are not yet saving beyond an emergency fund. Get the cash cushion first, then come back. You can also skip it if your employer plan is a 401(k), not a 403(b): the parallel page is 401(k) vs Roth IRA, and the logic is nearly identical.

If you already max both accounts every year, this ordering question is solved for you. Your open questions are backdoor mechanics and what comes after both are full, which is a planning conversation, not something a page can answer for your specific numbers.