If you’re contributing to a 403(b) retirement plan, you’ve likely come across two common investment choices: annuities and mutual funds. While both are designed to help you save for retirement, they differ significantly in structure, fees, risk, returns, and long-term flexibility.
This article compares 403(b) annuities vs. mutual funds in detail—complete with real-world examples, expert insights, performance statistics, and tax implications—so you can make an informed decision about where to invest your retirement savings.
What Is a 403(b) Plan?
A 403(b) is a tax-advantaged retirement plan for employees of public schools, certain nonprofits, and some churches. It's similar to a 401(k) but tailored to the nonprofit and public sector. Contributions are made pre-tax, grow tax-deferred, and are taxed as ordinary income upon withdrawal.
There are generally two types of investments allowed in 403(b) plans:
Annuities (specifically tax-sheltered annuities or TSAs)
Mutual funds (usually through custodial accounts)
403(b) Annuities Explained
A 403(b) annuity is a contract with an insurance company that allows your investment to grow tax-deferred and eventually provide income in retirement, either through lump-sum withdrawals or guaranteed lifetime payments.
Types of 403(b) Annuities
Fixed Annuities: Provide a guaranteed interest rate.
Variable Annuities: Allow you to invest in sub-accounts (like mutual funds), with potential for higher returns—but also higher risk.
Indexed Annuities: Tie your returns to a market index (e.g., S&P 500), usually with capped gains and minimum guarantees.
Pros of 403(b) Annuities
Guaranteed Income: Some contracts offer lifetime income options.
Principal Protection: Fixed annuities protect your initial investment.
Tax Deferral: Gains aren't taxed until withdrawal.
Rider Options: Add-ons like death benefits or inflation protection (for a fee).
Cons of 403(b) Annuities
High Fees: Mortality and expense (M&E) charges can range from 1.25% to 2% annually.
Surrender Charges: Withdrawing early may cost 5% to 7% in penalties.
Lower Transparency: It's often difficult to assess the performance of sub-accounts.
Sales Commissions: Many annuities are sold by commissioned agents, creating conflicts of interest.
Mutual Funds in a 403(b) Plan
Mutual funds in a 403(b) are generally offered through custodial accounts like Fidelity, Vanguard, or TIAA. They include a mix of stocks, bonds, and money market instruments, managed either actively or passively.
Common Mutual Fund Types in 403(b) Plans
Target-date funds: Automatically adjust risk over time (e.g., Vanguard Target Retirement 2055 Fund).
Index funds: Low-cost funds that track an index like the S&P 500 (e.g., Fidelity 500 Index Fund).
Bond funds: Provide income with lower volatility (e.g., TIAA-CREF Bond Index Institutional).
Pros of Mutual Funds
Lower Fees: Index funds often charge as little as 0.02%–0.10% annually.
Higher Growth Potential: Historically, diversified mutual funds have returned 6%–10% annually over the long term.
No Surrender Charges: Greater liquidity compared to annuities.
Transparency: Easy to track holdings, fees, and performance.
Cons of Mutual Funds
Market Risk: No guaranteed returns.
No Lifetime Income Guarantee: Unlike annuities, mutual funds don’t offer guaranteed payouts.
Investor Discipline Required: May require more involvement and knowledge to rebalance.
Fee Comparison: Annuity vs. Mutual Funds
| Feature | Annuity (Variable) | Mutual Fund (Index Fund) |
|---|---|---|
| Annual Fees | 1.5%–3% | 0.03%–1.0% |
| Surrender Charges | 5%–7% (up to 10 years) | None |
| Sales Commissions | 3%–5% (often hidden) | None (no-load funds) |
| Transparency | Low | High |
Source: FINRA, Vanguard, Morningstar (2024)
Real-World Example
Let’s compare two hypothetical investors each contributing $6,000/year for 30 years with an average annual return of 7% for mutual funds and 5% for annuities (after fees):
403(b) Annuity:
Total Contributions: $180,000
Future Value @ 5%: ~$377,000
403(b) Mutual Fund:
Total Contributions: $180,000
Future Value @ 7%: ~$567,000
Difference: Over $190,000 in favor of the mutual fund, largely due to lower fees and higher expected returns.
Expert Tips on Choosing Between the Two
1. Look at Fees First
High annual fees in annuities can severely limit growth. Morningstar reports that reducing investment fees by 1% can increase your retirement savings by 20% over 30 years.
2. Consider Lifetime Income Needs
If you're worried about outliving your money, a lifetime income rider in an annuity could be valuable—just ensure the costs don’t outweigh the benefits.
3. Know Your Plan Options
Many 403(b) providers still push high-fee annuities, especially in public school systems. Ask your employer if you can choose a low-fee mutual fund provider like Vanguard, Fidelity, or TIAA.
4. Don’t Be Swayed by Salespeople
Unlike mutual funds, annuities are often sold by commissioned reps. This can create bias. Always ask: “Is this a fiduciary recommendation?”
What Do the Experts Say?
U.S. Government Accountability Office (GAO) found that 403(b) participants in annuity-heavy plans may pay up to 10x more in fees than those with mutual fund options【GAO, 2019】.
Morningstar warns against variable annuities inside retirement accounts, noting that “they offer no additional tax benefit, but do introduce high costs.”
Fiduciary financial advisors often recommend low-cost index funds unless annuities serve a specific purpose (like income guarantees or longevity risk hedging).
Tax Implications
403(b) mutual funds and annuities both grow tax-deferred.
Withdrawals are taxed as ordinary income, regardless of the type.
No step-up in basis for heirs—unlike taxable accounts.
RMDs begin at age 73 unless the account holder is still employed.
When a 403(b) Annuity Might Make Sense
You’re risk-averse and want a guaranteed income stream.
You’re within 10 years of retirement and prioritizing stability over growth.
Your 403(b) plan only offers annuities (though this is becoming rarer).
When Mutual Funds Are the Better Choice
You want lower fees and higher long-term growth potential.
You’re comfortable managing asset allocation or using target-date funds.
You want full liquidity and flexibility in retirement.
Final Verdict: Which Should You Choose?
| Goal | Best Option |
|---|---|
| Maximize long-term growth | Mutual Funds |
| Lowest fees | Mutual Funds |
| Guaranteed income | 403(b) Annuity |
| Simplicity & transparency | Mutual Funds |
| Risk protection | Fixed Annuity (maybe) |
Conclusion
While 403(b) annuities offer income guarantees and principal protection, they come with high fees, less flexibility, and often poor transparency. On the other hand, mutual funds offer superior growth potential, lower costs, and greater flexibility, making them the preferred option for most long-term retirement investors.
Unless you have a strong reason to prioritize guaranteed income or are limited by your employer’s plan, mutual funds are typically the better investment choice inside a 403(b).