403(b) vs 457(b): Tax Differences Explained

The 403(b) vs 457(b) tax differences are rooted in who uses them: 403(b) plans cover employees of non-profits and schools, while 457(b) plans serve state and local government workers. The plans diverge sharply on early-withdrawal penalties, contribution limits, and when distributions must begin—understanding those gaps matters if you’re juggling both or deciding between employer options.

Who gets what and why

403(b) plans (also called tax-sheltered annuities or TSAs) were designed for employees of tax-exempt organizations—universities, hospitals, religious institutions, and public school teachers. Contributions reduce your taxable income for the year, and the balance grows tax-deferred. Money withdrawn in retirement is taxed as ordinary income.

457(b) plans are exclusive to government employers: state agencies, city governments, counties, and certain other public entities. The tax deferral works the same way, but the plan structure and rules differ significantly. A key distinction is that 457(b) is technically an “unfunded” plan, meaning the deferred money isn’t set aside in a trust but remains the employer’s general asset—a feature that affects loan availability and some distribution options.

Contribution limits and double-dipping

Both plans have the same nominal annual contribution limit: $23,500 in 2024 (adjusted for inflation annually). But here’s the critical difference: the limits are separate. If you work for a non-profit and a government entity simultaneously, or switch between them, you can contribute to both plans in the same year, up to the limit for each. This is a rare advantage—most retirement plans (like a 401(k) and IRA) have combined aggregate limits.

Catch-up contributions work the same way: at age 50, you can add an extra $7,500 to either or both plans. Government workers also have access to a special “government non-periodic deferral” option that lets them catch up further if they’ve been underfunded in prior years, subject to strict rules.

Early withdrawal: penalty or not

The 10% early-withdrawal penalty that applies to most retirement accounts has a notable exception for 457(b) plans—there is no penalty at all. However, that doesn’t mean the money is tax-free. Withdrawals from a 457(b) before age 59½ are taxed as ordinary income just like any retirement distribution, but you dodge the 10% penalty.

403(b) plans follow the standard rule: withdraw before age 59½ and pay a 10% penalty plus regular income tax on the withdrawal (unless an exception applies, such as separation from service, hardship, or long-term disability).

This distinction makes 457(b) plans subtly more flexible for workers who need to access savings before traditional retirement age, though the tax bill remains the same.

Distribution timing and required minimum distributions

403(b) plans require distributions to begin no later than April 1 following the year you turn 73 (under the SECURE 2.0 Act). Required minimum distributions (RMDs) are calculated using IRS life-expectancy tables and the December 31 balance of the prior year. If you’re still working for the employer, some plans allow you to defer distributions (the “still-working exception”), though this doesn’t apply to 5% or more owners.

457(b) plans have a different trigger: distributions must generally begin no later than the April 1 following either age 72 or your retirement date, whichever is later. This means if you keep working past age 72, you might defer RMDs longer than you could in a 403(b). RMD calculations are identical—based on life expectancy and prior-year balance.

The key upside of the 457(b) rule is the potential to work longer and keep the money growing tax-deferred. The downside is tracking a different required age and deadline.

Loans and in-service withdrawals

403(b) plans typically allow loans to participants. You can borrow up to 50% of your balance (or $50,000, whichever is less) and repay over five years. The loan interest goes back into your account. This flexibility is widely available.

457(b) plans technically allow loans under some designs, but the rules are stricter and vary by employer. More importantly, any withdrawal from a 457(b) before age 59½ is taxed immediately—even if it’s framed as a loan or hardship withdrawal. Some 457(b) plans don’t offer loans at all, instead allowing “in-service withdrawals” that trigger a full taxable event.

Roth and tax diversification

Both plans now support Roth deferrals, meaning you can contribute after-tax income and let it grow tax-free, withdrawing gains tax-free in retirement (after a five-year holding period and age 59½ or qualifying event). This is valuable if you expect to be in a higher tax bracket later, but not every plan offers the Roth option. Check with your employer.

If both your 403(b) and 457(b) allow Roth deferrals, you can split contributions between traditional and Roth in each plan, building useful tax diversification.

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