Over the past two decades, almost every client I have worked with, first at TIAA and now at Tidewater, has carried a 403(b) rather than a 401(k). Professors, researchers, physicians, and hospital administrators all save for retirement through this plan, yet very few have had someone walk them through what actually makes it different from the 401(k) their friends in the private sector talk about. The differences are not just technical. They affect how much you can save, which investments are available to you, and how your retirement income ultimately comes together.
I want to walk through those differences here, plainly and without jargon, so that when you sit down to review your own plan, you know exactly what you are looking at.
How a 403(b) Plan Works
A 403(b) is a tax-deferred retirement plan offered by public schools, colleges and universities, hospitals, and certain nonprofit and religious organizations. Structurally, it works much like a 401(k): you defer a portion of your salary before taxes (or after taxes, if your plan offers a Roth option), that money is invested, and it grows tax-deferred until you withdraw it in retirement.
For 2026, employees can defer up to $24,500 of salary into a 403(b), the same base limit that applies to 401(k) plans. If you are age 50 or older, you can add a catch-up contribution of $8,000, bringing your total to $32,500. If you are between ages 60 and 63, that catch-up rises to $11,250, for a total of $35,750. These limits are indexed for inflation, so it is worth confirming them each year rather than assuming last year's number still applies.
Employer contributions vary considerably by institution. Some universities and hospitals match a percentage of your contribution dollar for dollar, others contribute a fixed percentage of salary regardless of what you defer, and some smaller nonprofits offer no match at all. I encourage every client to know precisely how their employer's match works, because it often shapes how much you should be contributing in the first place.
As for investment options, most 403(b) plans today offer a menu of mutual funds and, in many cases, annuity contracts through one or more approved vendors. That menu is usually narrower than what you would find in a typical 401(k), which brings me to the next point.
Key Differences From a 401(k)
The biggest structural difference between a 403(b) and a 401(k) is the vendor relationship. A 401(k) is almost always run through a single recordkeeper chosen by the employer. A 403(b), particularly at universities and hospitals, is often run through multiple approved vendors at once. Your employer might offer TIAA, Fidelity, and Vanguard side by side, and you choose which one (or which combination) holds your account. That structure can be an advantage, since it gives you more control over where your money sits, but it also means two colleagues at the same institution can end up with very different investment options, fees, and account features simply because they chose different vendors when they enrolled.
This vendor structure exists partly for historical reasons. Before 1974, 403(b) plans could only hold annuity contracts. It was not until later reforms that mutual fund custodial accounts became available alongside annuities, which is why many long-standing 403(b) plans, especially those run through TIAA, still carry a strong annuity component even today. If you have been contributing to the same plan for fifteen or twenty years, there is a reasonable chance that a meaningful portion of your balance sits in an annuity-based account you opened without much explanation of how it worked.
That is where TIAA's role becomes important. TIAA has long been the dominant 403(b) provider in higher education, medicine, and research, and many of you reading this have an account with them right now, often through products like TIAA Traditional or the CREF accounts. These accounts can offer real value, including guaranteed income features, but they also tend to come with different liquidity rules and transfer provisions than a typical mutual fund. Before you assume your TIAA balance behaves like the rest of your portfolio, it is worth having someone review the specific terms of your contract.
One more distinction worth knowing: many 403(b) plans sponsored by public schools, churches, and certain other organizations are exempt from ERISA, the federal law that governs most private retirement plans. That exemption can mean fewer required disclosures and fewer built-in fiduciary protections than you would have in a standard 401(k), which is one more reason it pays to understand your plan rather than assume it works just like your spouse's or your neighbor's.
A 403(b)-Specific Advantage: The 15-Year Catch-Up
Here is a provision unique to the 403(b) that I bring up with almost every long-tenured client: if you have at least fifteen years of service with the same qualifying employer, such as a public school system, hospital, or church-affiliated organization, your plan may allow you to defer an additional amount beyond the standard limit. This 15-year catch-up allows up to $3,000 in extra contributions per year, up to a lifetime cap of $15,000.
This is separate from the age-50 catch-up I mentioned earlier, and depending on your age and years of service, you may be able to use both provisions, though the IRS rules for combining them are specific and worth reviewing with your plan administrator before you assume you qualify. For someone who has spent fifteen or more years at the same university or hospital and is now in their final working decade, this can meaningfully accelerate retirement savings at exactly the point in a career when income, and the ability to save, tends to be highest.
Coordinating Your 403(b) With a Pension or Defined Benefit Plan
For many of my clients in academia, the 403(b) is not the whole retirement picture. It is one piece alongside a pension or defined benefit plan, and how those two pieces fit together matters a great deal.
If your institution offers a traditional pension, your 403(b) is generally supplemental. The pension provides a baseline of guaranteed income, and the 403(b) exists to fill whatever gap remains between that baseline and the retirement lifestyle you actually want. If your institution instead offers a defined contribution plan as your primary retirement vehicle, with no pension at all, then your 403(b) often becomes one of the main engines of your retirement income, alongside Social Security and any personal savings.
Either way, the right approach starts with a gap analysis: projecting your expected pension or defined contribution income, your Social Security benefit, and your other resources, then comparing that total to what you actually expect to spend in retirement. That comparison tells you how hard your 403(b) needs to work, and it often reshapes decisions about contribution rates, investment risk, and even when it makes sense to begin drawing on each source of income.
The Connecticut Landscape: Yale, UConn, Quinnipiac, and Beyond
Because I work with educators and physicians across Connecticut, I want to speak directly to a few of the institutions I see most often, recognizing that every employer's plan is structured a little differently.
Yale University: Yale's retirement program is recordkept primarily through TIAA and includes more than one plan, including a matching retirement plan and a separate voluntary tax-deferred 403(b) savings plan. Which plan applies to you often depends on your job category, so it is worth confirming exactly which Yale plan, or plans, you are enrolled in before assuming you understand your match and your investment menu.
University of Connecticut: As a state employee, your core retirement plan is typically either a traditional pension through the State Employees Retirement System (or Teachers' Retirement System, for those who qualify) or the Alternate Retirement Program, a defined contribution plan. On top of that core plan, UConn faculty and staff have access to supplemental 403(b) and 457 plans for additional voluntary savings. Knowing which core plan you are in changes how much weight your supplemental 403(b) needs to carry.
Quinnipiac University and other private CT institutions: Most private colleges and universities in Connecticut do not offer a traditional pension. For employees at these institutions, the 403(b) is usually the primary retirement vehicle, often with an employer match and a choice between one or more approved vendors.
The common thread across all of these is that no two Connecticut institutions structure their retirement benefits identically. I would rather a client come to me and say "I am not sure which plan I am actually in" than assume their plan works exactly like a colleague's at a different school.
Common Mistakes I See
Not reviewing the investment options within the plan. Many people enroll once, accept the default fund, and never look again. A default target-date or lifecycle fund is a reasonable starting point, but it is rarely the optimal choice for your specific situation years later.
Ignoring available vendor options. If your plan offers a choice between providers, take the time to understand how their fees, fund menus, and account features differ. Defaulting to whichever vendor your colleague mentioned is not the same as choosing the right one for you.
Failing to name, or update, a beneficiary. This is the simplest item on this list and the one I see overlooked most often. A beneficiary designation that has not been updated since you were single, or before you had children, can undo years of careful planning in a single oversight. Take ten minutes to confirm it is current.
Let's Review Your Plan Together
If you have spent your career in higher education, medicine, or research, your retirement plan deserves the same level of attention you have given everything else in your career. I would welcome the opportunity to sit down, review your 403(b) alongside any pension or other retirement benefits you have, and help you understand exactly where you stand.
You can reach my office in New Haven directly, or schedule a consultation through the Tidewater Wealth Management website. I look forward to the conversation.
About the Author
David Wheatley, CLU® ChFC®, is a Senior Partner and financial advisor at Tidewater Wealth Management in New Haven, Connecticut. He specializes in retirement planning for higher education professionals and physicians, with over 20 years of experience in tax-efficient income distribution and estate strategies.
Advisory services offered through NewEdge Advisors, LLC, a registered investment adviser.
Compliance note: 2026 contribution limits and IRS provisions referenced above (deferral limits, catch-up amounts, 15-year service catch-up) should be confirmed against current IRS guidance at time of publication. Plan-specific details for Yale, UConn, and Quinnipiac should be verified against each institution's current summary plan description before this article goes live.