403(b) vs. Roth IRA: How to Choose (and Why Most Should Fund Both)

A 403(b) is a workplace retirement plan available to employees of public schools, §501(c)(3) nonprofits, hospitals, and churches under IRC §403(b). A Roth IRA is a personal retirement account anyone with earned income can open under IRC §408A. The 403(b) has a much higher annual cap ($24,500 in 2026 under IRC §402(g) vs. $7,500 for the Roth IRA), often comes with an employer match, and reduces your current taxable income (with pre-tax treatment) or grows tax-free (with Roth 403(b) treatment under IRC §402A). The Roth IRA offers complete investment freedom, no required minimum distributions during the owner’s lifetime (IRC §408A(c)(5)), tax-free qualified withdrawals, and pre-retirement contribution-withdrawal flexibility under IRC §408A(d)(4). Most savers should fund both, in this order: 403(b) up to the employer match → max the Roth IRA → back to the 403(b) up to the §402(g) limit.

The Bottom Line

The 403(b) and Roth IRA are complementary, not competitive. For most savers at qualifying employers, the right answer is to fund both. Use the 403(b) for the high contribution cap and the employer match (which is free money); use the Roth IRA for tax-free growth, investment freedom, and pre-retirement flexibility. The decision logic:

• Always capture the full employer match in the 403(b) first. A 100% match on the first 5% of salary is a guaranteed 100% return — nothing in the Roth IRA matches that.
• Usually max the Roth IRA next ($7,500 / $8,600). The Roth wrapper’s 30+ year tax-free compounding plus the investment freedom plus the pre-59½ contribution-withdrawal flexibility under IRC §408A(d)(4) usually beat additional 403(b) deferrals dollar-for-dollar.
• Then return to the 403(b) to push toward the §402(g) limit ($24,500 in 2026, plus catch-ups if eligible).
• Exception: if your 403(b) menu is annuity-only with high fees, skip step 3 (or minimize it) and route extra savings to a taxable brokerage instead. Fees compound just like returns.

Side-by-Side Comparison

Why You Should Match First, Always

Employer matching is the single most valuable feature of a 403(b) and it’s the reason "match first" is universal advice. Typical matches at qualifying employers:

• Public school districts: often no match, but some districts contribute a non-elective 3–7% of salary regardless of employee deferrals.
• Hospitals and large nonprofits: dollar-for-dollar match on first 3–5% of salary is common; some match 50% on 6%.
• Higher education (TIAA participating institutions): some institutions contribute 5–10% of salary non-electively plus a match on employee deferrals.
• Churches and small nonprofits: matches less common; check the plan summary.

A 5% match means $4,000/year free on an $80,000 salary — that’s more than half a year’s Roth IRA contribution at zero out-of-pocket cost. No investment in any tax-advantaged account anywhere can outperform the immediate 100% return of an employer match. Capture it before doing anything else.

When the Roth IRA Wins (After the Match)

Once you’ve captured the full employer match, the Roth IRA usually deserves the next dollar over additional 403(b) deferrals. Five reasons:

• Investment freedom. A 403(b) menu typically holds 10–30 annuity products or mutual funds — what the plan administrator chose. A Roth IRA at Fidelity, Schwab, or Vanguard gives you access to thousands of mutual funds and ETFs, individual stocks, bonds, and CDs. If your 403(b) lacks low-cost index options (some still don’t), the Roth IRA is your only path to a 0.03% expense ratio.
• Tax diversification. Pre-tax 403(b) money is taxed when withdrawn; Roth IRA money is tax-free. Holding both lets you manage tax bracket strategically in retirement — pulling pre-tax for the lower brackets and Roth for amounts that would push you into higher brackets, IRMAA tiers, or trigger the 85% Social Security taxation threshold.
• No RMDs. Pre-tax 403(b) balances require RMDs starting at age 73 (or 75 for those born 1960+, per SECURE 2.0 §107 as finalized in TD 10001). The Roth IRA has no lifetime RMD requirement under IRC §408A(c)(5). Money in the Roth wrapper can grow tax-free as long as you live.
• Pre-retirement flexibility. Roth IRA contributions can be withdrawn at any age tax- and penalty-free under the §408A(d)(4) ordering rules. 403(b) early withdrawals are largely restricted to hardship, separation from service after age 55, or attainment of 59½.
• Survives a job change. The 403(b) follows your employer; the Roth IRA follows you. Job changes, contract endings, and early retirements don’t affect the Roth IRA. The 403(b) may have a rollover decision to manage.

When the 403(b) Wins (After the Roth IRA Cap)

The 403(b)’s structural advantage is the contribution cap. Once you’ve maxed the Roth IRA, the 403(b) is the next natural destination for tax-advantaged dollars:

• Raw capacity. $24,500 vs. $7,500 means 3.3× more annual deferral capacity. Over a 30-year career, that’s the difference between a $1.5M and a $4.7M tax-advantaged balance at 7% real returns.
• Current-year deduction. Pre-tax 403(b) contributions reduce AGI dollar-for-dollar, lowering taxable income and (for some) avoiding higher tax brackets, AMT exposure, or NIIT thresholds.
• Age-50 + super catch-ups. The 403(b) age-50 catch-up is $8,000 (vs. $1,100 for Roth IRA), and the ages-60-63 super catch-up adds $11,250 more — totals not available in the Roth IRA structure.
• 15-year service catch-up. Unique to 403(b) plans. Adds up to $3,000/year ($15,000 lifetime) for employees of qualified orgs with 15+ years of service. Stacks with the age-50 catch-up.
• Automatic payroll discipline. Pre-tax deferrals come straight off the paycheck. No transfer to schedule, no behavioral leakage.

The 15-Year Service Catch-Up Most People Miss

Under IRC §402(g)(7), certain 403(b) participants can defer up to $3,000 more per year above the regular §402(g) limit. Eligibility:

• Must work for a "qualified organization" — defined as an educational organization, hospital, home health service agency, health and welfare service agency, church, or convention/association of churches.
• Must have at least 15 years of service with the same eligible employer (not aggregate across employers).
• Catch-up amount is the lesser of: (a) $3,000, (b) $15,000 minus prior 15-year catch-ups already claimed, or (c) $5,000 multiplied by years of service, minus all prior elective deferrals.
• Plan document must explicitly permit the 15-year catch-up. Not all 403(b) plans offer it.

This catch-up stacks with the regular age-50 catch-up (and the 60-63 super catch-up). A 50+ teacher at a public school with 20+ years of service whose plan offers the 15-year catch-up could potentially defer $24,500 + $8,000 + $3,000 = $35,500 in 2026. Add the ages-60-63 super catch-up and the ceiling rises further. Most participants never claim this catch-up because their plans don’t advertise it or HR isn’t trained on it — check your Summary Plan Description.

Investment Menu — The Annuity Trap

Not all 403(b) plans are created equal. The original 403(b) was an annuity-only vehicle — section 403(b)(1) of the Code authorized "annuity contracts" purchased by tax-exempt employers for their employees. Mutual fund custodial accounts were added in 1974 under §403(b)(7). Today most plans offer both, but some still don’t.

The risk: high-fee annuity contracts can eat the tax-deferral advantage. Common 403(b) annuity fee structures:

• Mortality & expense (M&E) charges: 1.0–1.5% per year (insurance company profit margin).
• Investment management fees: 0.5–1.0% per year on the underlying subaccounts.
• Surrender charges: 5–7% in the first year, declining over 7–10 years — meaning you can’t leave without penalty.
• 12b-1 marketing fees: 0.25% per year in some products.

Total drag can reach 2.0–3.0% per year. Over 30 years at 7% real, a 2% fee drag costs roughly 40% of the terminal balance. Contrast with a Vanguard or Fidelity Roth IRA holding a broad-market index fund at 0.03% expense ratio — the fee differential alone exceeds the Roth wrapper’s after-tax benefit for most savers.

How to check your plan: ask HR for the Summary Plan Description and a list of approved investment providers. If your only options are TIAA Traditional, MetLife, AXA / Equitable, VALIC / Corebridge, or similar legacy 403(b) vendors with annuity-only menus, prioritize the Roth IRA after the match. If your plan offers Fidelity, Vanguard, Schwab, or TIAA-CREF mutual funds under §403(b)(7) with low expense ratios, max the 403(b) freely.

Rollover Mechanics — 403(b) to Roth IRA

Under IRC §402(c)(8), 403(b) funds can be rolled to a Roth IRA. Two types:

• Roth 403(b) → Roth IRA: direct, tax-free rollover. No income recognized. The Roth 403(b) is treated like a Roth account for rollover purposes under IRC §402A.
• Pre-tax 403(b) → Roth IRA: Roth conversion. The entire pre-tax balance is added to that year’s AGI as ordinary income. No 10% §72(t) early-withdrawal penalty applies to a direct conversion — the tax is owed but no penalty.

Most rollovers happen at separation from service (job change, retirement, layoff) or after age 59½ (if the plan permits in-service distributions). Mechanics:

• Direct trustee-to-trustee transfer: the 403(b) custodian sends funds directly to your Roth IRA custodian. No 60-day clock, no 20% withholding. Always preferred.
• Indirect rollover: you receive a check, then have 60 days to deposit at the Roth IRA. The 403(b) custodian withholds 20% under IRC §3405(c); you must make up that 20% from other funds to complete a full rollover.

The pro-rata rule under IRC §408(d)(2) does NOT apply to workplace-plan rollovers — the conversion is straightforward, not subject to the basis-blending mess that affects IRA-to-Roth conversions when pre-tax IRA balances exist. Strategic conversions in low-income years (sabbatical, early retirement before Social Security, etc.) can dramatically reduce lifetime tax. See 401(k) to Roth IRA Rollover for the parallel workflow on 401(k) accounts — the mechanics are nearly identical.

The Standard Funding Sequence

For a worker at a qualifying employer with both a 403(b) match and access to Roth IRA contributions:

1. 403(b) up to the full employer match. If the match is 100% on the first 5%, contribute 5% of salary. Free money compounds — do this even if money is tight.
2. Roth IRA: max the annual cap. $7,500 in 2026 ($8,600 if 50+). Spread monthly (~$625/month) or in one lump sum at any point during the year (deadline: April 15 of the following year).
3. HSA if eligible. If you have an HSA-compatible health plan, max the HSA next ($4,400 self-only / $8,750 family in 2026). Triple-tax-advantaged: deductible going in, tax-free growth, tax-free for qualified medical.
4. Back to 403(b) up to the §402(g) limit. $24,500 in 2026 (plus catch-ups). Pre-tax or Roth 403(b) depending on tax-bracket strategy.
5. Taxable brokerage for additional savings. See Roth IRA vs. Brokerage Account for the asset-placement framework — tax-inefficient assets in the Roth wrapper, tax-efficient assets in the brokerage.

For high earners above the Roth IRA MAGI phase-out (MAGI > $168K single / $252K MFJ in 2026), substitute the backdoor Roth IRA for step 2. The 403(b) and Roth 403(b) have no MAGI phase-out.

Worked Example: Maria, Age 35, $80K Salary at a Hospital

Maria is 35, earns $80,000 as a hospital RN, files single, and saves 15% of gross income ($12,000/year). Her hospital offers a dollar-for-dollar 403(b) match on the first 5% of salary ($4,000/year free) plus a low-cost Fidelity 403(b)(7) menu. Her sequence:

• 403(b) at 5% of salary: $4,000/year out-of-pocket + $4,000 match = $8,000/year going in. Pre-tax (saves $880 at 22% marginal). Effective out-of-pocket: ~$3,120.
• Roth IRA: $7,500/year. Post-tax (no current deduction). After-tax cost: $7,500.
• 403(b) back to it: remaining $1,380 of her $12,000 budget routes here. Pre-tax (saves $304). Effective out-of-pocket: $1,076.

Over 30 years at 7% real returns:

• 403(b) (pre-tax, $9,380/year inflow $8,000 + $1,380): grows to ~$885K; taxed at withdrawal (assume 22% effective) ≈ $690K after-tax.
• Roth IRA ($7,500/year): grows to ~$708K, all tax-free.
• Total after-tax retirement balance: ~$1.4M.

If Maria instead funded only the 403(b) (skipping the Roth IRA): all $16,880/year flows pre-tax. Grows to ~$1.59M, taxed at 22% effective = ~$1.24M after-tax. The Roth IRA inclusion delivers approximately $160K more after-tax wealth over 30 years — pure tax diversification value.

Maria also gets the §408A(d)(4) contribution-withdrawal flexibility on the Roth IRA principal: she could pull her $225K in contributions at any age without tax or penalty, while her 403(b) money is fully locked until 59½ (with limited exceptions). See Growth Projection to model your own numbers.

Common Mistakes to Avoid

• Skipping the employer match to fund the Roth IRA first. The 100% match is a guaranteed return that compounds tax-deferred. Always capture it before any Roth IRA contribution — the math is not close.
• Maxing a high-fee 403(b) annuity menu. If your 403(b) options are all 1.5%+ annuity contracts with surrender charges, fund only up to the match and route excess to a Roth IRA + taxable brokerage instead. Run the math on your specific menu — fees can fully erase the tax-deferral benefit.
• Forgetting about the 15-year service catch-up. Eligible employees at qualified orgs with 15+ years of service can add $3,000/year ($15,000 lifetime) — many never claim it because HR isn’t trained on it. Check your Summary Plan Description.
• Assuming the 403(b) and Roth IRA limits are connected. They aren’t. The §402(g) limit governs the 403(b); the IRC §408A limit governs the Roth IRA. Both run independently. You can max both.
• Rolling a 403(b) to a Roth IRA in a high-income year. The pre-tax portion of the conversion is fully taxable. Conversions in retirement years (before Social Security and RMDs) are usually far more tax-efficient than conversions while still working.
• Ignoring Roth 403(b) when the plan offers it. Roth 403(b) under IRC §402A combines the high-contribution-limit advantage of the 403(b) with the tax-free withdrawal advantage of the Roth IRA. For workers in lower marginal brackets early in their career, Roth treatment within the 403(b) usually beats pre-tax treatment.