403(b) Plan: How the Teacher and Nonprofit Retirement Account Works

A 403(b) is a workplace retirement plan for employees of public schools, colleges, and 501(c)(3) tax-exempt organisations such as hospitals, charities, and some religious bodies. It works much like a 401(k): you contribute from your salary, the money grows tax-deferred (or tax-free in a Roth version), and you draw it in retirement. The differences are in the details, and those details are where teachers and nonprofit staff most often lose money without realising it. This guide explains how a 403(b) works, the contribution rules including a catch-up almost unique to these plans, the fee trap that has historically dogged the product, how withdrawals are taxed, and how it compares with the other workplace plans. Any dollar limits are set by the IRS and change each year, so I keep them general here and point you to current figures; treat everything as education, not personal financial advice.

The plan is sometimes still called a tax-sheltered annuity, or TSA, a name that hints at its history: 403(b)s originally held only annuity contracts, and even now the investment menu often leans heavily on insurance products. Understanding that history is the key to using one well.

Who Can Use a 403(b) and How It Works

Eligibility is defined by employer type, not by job. If you work for a public education institution or a 501(c)(3) nonprofit, you may have access to a 403(b); if your employer is a for-profit company, you will have a 401(k) or something else instead. The core mechanics are familiar:

• You elect to defer part of your pay into the plan, and that amount is deducted from your paycheck before (or, for Roth, after) tax.
• The money is invested in the options the plan offers and grows without annual tax on the gains.
• You draw it in retirement, at which point it is taxed according to whether the contributions were pre-tax or Roth.

Contributions go into one of two vehicles: an annuity contract from an insurance company, or a custodial account holding mutual funds. That either/or is a defining feature of the 403(b), and it explains a lot about the fees, which I return to below. Many employers also contribute, through a match or a fixed contribution, though nonprofit and school budgets mean employer money is sometimes more modest than in the corporate 401(k) world.

Where a 403(b) sits among your options is worth mapping early; the overview in tax-advantaged retirement accounts puts it alongside IRAs, 401(k)s, and the rest.

Contribution Rules and the 15-Year Catch-Up

A 403(b) uses the same basic elective-deferral limit as a 401(k), set by the IRS and adjusted most years for inflation. On top of the standard limit, participants who reach age 50 can make an additional age-based catch-up contribution, and under the SECURE 2.0 Act, those in a narrow older age band (currently ages 60 to 63) can make an even larger "super catch-up." Because these dollar figures change annually, check the current IRS numbers rather than relying on any amount you read in an article.

The feature that sets the 403(b) apart is the 15-years-of-service catch-up. Certain qualified employers, including schools, hospitals, and health and welfare organisations, may let an employee with at least 15 years of service with that same employer contribute an extra amount above the normal limit, subject to a lifetime cap and an annual cap. It is genuinely unusual, and it can matter a great deal to a long-tenured teacher or nurse approaching retirement. The rules for calculating it are technical, the service must be with the same qualifying employer, and it is one of the more commonly miscalculated items on IRS 403(b) compliance guidance, so it is worth confirming the exact figure with your plan administrator.

When someone qualifies for both the 15-year catch-up and an age-based catch-up in the same year, contributions are generally applied to the 15-year catch-up first. Many plans also offer a Roth 403(b) option, letting you contribute after-tax money for tax-free qualified withdrawals later, which is the mirror image of the pre-tax choice and often the more valuable one for younger contributors.

The Fee Trap Worth Knowing About

Here is the part most 403(b) coverage understates. Because these plans grew up around annuity products sold to individual teachers, the investment menu in many school 403(b)s has historically been dominated by high-cost annuity contracts, sometimes carrying layered charges: the underlying investment fee, an insurance or mortality-and-expense charge, administrative fees, and surrender charges that penalise you for moving your money for a period of years.

The effect compounds. A difference of one or two percentage points in annual costs, sustained over a working career, can quietly consume a large share of what you would otherwise have accumulated. This is not a reason to avoid the plan, especially where an employer match is on offer, but it is a strong reason to look hard at the specific contracts your plan lists and to favour low-cost custodial (mutual fund) options where they are available. If your plan offers both an annuity and a mutual-fund custodial account, the choice between them is one of the most consequential decisions you will make inside the plan. Surrender charges in particular deserve scrutiny before you sign, because they can trap your money even after you have decided to move it.

How 403(b) Withdrawals Are Taxed

Tax treatment follows the type of contribution. Pre-tax (traditional) 403(b) contributions reduce your taxable income in the year you make them, grow tax-deferred, and are taxed as ordinary income when withdrawn. Roth 403(b) contributions are made with after-tax money, so qualified withdrawals in retirement, including the growth, come out tax-free.

A few rules apply across the board. Withdrawals before age 59½ are generally subject to an additional 10 percent federal penalty on top of ordinary tax, unless an exception applies. One useful exception is the "rule of 55," which can waive the penalty if you separate from the employer sponsoring the plan in or after the year you turn 55; the mechanics and traps are covered in the rule of 55. Traditional 403(b) balances are also subject to required minimum distributions once you reach the applicable age, explained in required minimum distribution age. Note that SECURE 2.0 removed lifetime RMDs from Roth accounts inside workplace plans, so a Roth 403(b) is no longer forced to distribute during your lifetime. Tax rules change and depend on your circumstances, so confirm the current position with the IRS or a tax professional.

403(b) vs 401(k) and 457(b)

On the surface a 403(b) and a 401(k) are close cousins, sharing the same core deferral limit, the same age-50 catch-up, Roth options, and employer contributions. The practical differences are what to weigh:

• Investment menu. 401(k)s typically offer mutual funds; 403(b)s historically leaned on annuities, which is where the fee concern comes from.
• The 15-year catch-up. Available only in 403(b)s, and only for qualifying employers and long-tenured staff.
• ERISA coverage. Governmental and many church 403(b)s are exempt from ERISA, while corporate 401(k)s are generally covered; ERISA status affects certain protections and employer duties.

If your employer also offers a governmental 457(b) plan, as many public school systems and hospitals do, you may be able to contribute to both in the same year, each under its own separate limit, which is a powerful way to shelter more income. The 457(b) has its own standout feature, no 10 percent early-withdrawal penalty after you separate from service, covered in the 457 plan. Comparing the full menu of workplace options is the subject of best retirement plans.

What to Do When You Leave

When you change jobs or retire, a 403(b) does not have to stay put. You can generally leave it with the former employer's plan, roll it into a new employer's plan if that plan accepts rollovers, or roll it into an IRA, which often widens your investment choices and can lower costs. A direct rollover, moving the money custodian to custodian, avoids mandatory withholding and the risk of a missed deadline; the process and the pitfalls are the same ones set out in the 401(k) rollover guide, which applies equally to 403(b) money. Watch for surrender charges on annuity contracts before initiating a transfer, because they can make an otherwise sensible rollover expensive if you move too soon.

This article is educational and not personal financial advice. Contribution limits, catch-up amounts, penalty exceptions, and tax rules are set by the IRS and change each year, and the investment options and fees in a 403(b) vary widely by employer and provider. Confirm the current figures and your plan's specific terms before acting.

403(b) Plan: Frequently Asked Questions

What is the difference between a 403(b) and a 401(k)?

They are structurally very similar, with the same core contribution limit, age-50 catch-up, Roth options, and the ability to receive employer contributions. The main differences are that 403(b)s are limited to public schools and 501(c)(3) nonprofits, historically offered annuity-heavy investment menus that can carry higher fees, allow a special 15-year-of-service catch-up, and are often exempt from ERISA when sponsored by a government or church.

What is the 403(b) 15-year catch-up?

It is an extra contribution above the normal limit that certain qualified employers, such as schools and hospitals, may allow for employees with at least 15 years of service with that same employer. It is subject to a lifetime cap and specific calculation rules and is applied before age-based catch-up amounts. The math is technical, so confirm your eligible amount with your plan administrator.

Are 403(b) withdrawals taxed?

Traditional 403(b) withdrawals are taxed as ordinary income, and withdrawals before age 59½ may face an extra 10 percent federal penalty unless an exception applies. Qualified Roth 403(b) withdrawals are tax-free. Traditional balances are subject to required minimum distributions at the applicable age; Roth workplace accounts no longer have lifetime RMDs under SECURE 2.0. Confirm current rules with the IRS.

Can I have both a 403(b) and a 457(b)?

Often, yes. If your employer offers both a 403(b) and a governmental 457(b), you can generally contribute to each up to its own separate limit in the same year, which lets you shelter substantially more income than either plan alone. The two plans have different early-withdrawal rules, so it is worth understanding both before deciding how to split your contributions.