Of all the investors who put their money exclusively in a single target-date fund in 2023, only 1% made any trades inside their accounts [1]. One percent. The other 99% did nothing. They didn't panic during the market dip. They didn't chase a hot sector. They didn't sell bonds to buy crypto.
For a product designed to be ignored, that's a perfect score.
30-Second Summary: A target-date fund is a single mutual fund that automatically adjusts your stock-bond mix as you age, shifting from aggressive to conservative as your retirement date approaches. They now hold over $3.5 trillion and account for 64% of all 401(k) contributions. For most retirement savers, they're the simplest, most effective option available.
How Target-Date Funds Work
You pick a fund based on the year you plan to retire. Planning to retire around 2055? Buy the 2055 fund. That's the only decision.
Inside the fund, a professional manager holds a diversified mix of stocks and bonds across multiple asset classes (U.S. stocks, international stocks, U.S. bonds, international bonds). The manager gradually shifts this mix over time, reducing stocks and increasing bonds as your target date approaches.
This shifting process is called the glide path. It's the fund's autopilot.
A 30-year-old investing in a 2060 fund might have 90% stocks today. By 2050, it's maybe 65% stocks. By 2060, around 50% stocks. The fund handles every rebalancing trade, every allocation shift, every buy and sell. You contribute money and forget about it.
Here's what the glide path looks like for two real investors at different life stages:
Alex, Age 30 (Vanguard Target Retirement 2060)
- Salary: $75,000
- Portfolio: $50,000
- Current allocation: ~90% stocks / ~10% bonds
- What this means: A 20% market drop costs Alex $9,000 on paper. But Alex has 30+ years to recover, and the heavy stock allocation maximizes growth potential during those decades.
Sam, Age 60 (Vanguard Target Retirement 2030)
- Salary: $110,000
- Portfolio: $500,000
- Current allocation: ~60% stocks / ~40% bonds
- What this means: The same 20% stock drop costs Sam $60,000 on his stock portion, or 12% of his total portfolio. Without the glide path (if Sam were still 90% stocks), that same crash would cost $90,000. The glide path preserved $30,000 in value, roughly a full year of Social Security benefits.
Over Sam's career, the fund executed roughly 30 automatic allocation shifts, each one reducing stock exposure by a small amount. No transaction costs. No emotional hesitation. No missed rebalances.
"To" vs. "Through" Glide Paths
Not all target-date funds hit the brakes at the same time.
"To" funds reach their most conservative allocation at the target date. If you buy a 2040 "To" fund, it's already at maximum conservatism by 2040 and stays there.
"Through" funds keep adjusting for years after the target date, gradually becoming more conservative into your 70s and beyond.
Vanguard, Fidelity, and most major providers use the "Through" approach [2]. The logic: a 65-year-old retiring today may live another 25 to 30 years. They still need growth. Shifting to 100% bonds at retirement creates a real risk of outliving your money.
This matters because a "To" fund might be 40% stocks at retirement while a "Through" fund might still be 50% to 55% stocks at the same moment. If you're worried about taking too much risk early in retirement, check which type your fund uses. It's in the fund's prospectus, or you can look it up on Morningstar.
What They Cost
Target-date fund fees have dropped dramatically.
The asset-weighted average expense ratio across all target-date funds is 0.36% [3]. But the range is wide.
| Provider | Example Fund | Expense Ratio | Annual Cost on $100,000 |
|---|
| Vanguard | Target Retirement 2050 (VFIFX) | 0.08% | $80 |
| Fidelity | Freedom Index 2050 (FIPFX) | 0.12% | $120 |
| T. Rowe Price | Retirement 2050 (TRRMX) | ~0.57% | $570 |
| Average active TDF | Various | ~0.64% | $640 |
The Vanguard fund costs $80 per year on $100,000. The average active fund costs $640. That $560 annual difference compounds to roughly $112,000 over 30 years on a $100,000 starting balance (assuming 7% growth).
Read that number again. A hundred and twelve thousand dollars. Gone. Not to market losses, but to fees. This is why checking the expense ratio of whatever target-date fund your 401(k) offers is one of the highest-value 5-minute tasks in all of personal finance.
If your 401(k) offers a low-cost index target-date fund (Vanguard, Fidelity Index, or Schwab Index), that's an easy choice. If the only option is an active fund charging 0.60%+, you might be better off building a three-fund portfolio yourself using the plan's cheapest index funds.
One industry shift worth noting: Collective Investment Trusts (CITs) overtook mutual funds in mid-2024, now holding 52% of total target-date assets [4]. CITs function almost identically to mutual funds but are available only in employer plans and typically charge lower fees. If your 401(k) recently swapped your target-date mutual fund for a CIT version, that's likely a good thing.
The Performance Track Record
Target-date funds have a solid track record, partly because they remove the biggest risk to your portfolio: you.
The 2025-vintage target-date funds (designed for people who recently retired) delivered an average annualized return of 7.3% over the 15-year cycle ending 2024 [5]. That's not spectacular, but it's a real return earned by real investors who actually stayed invested, which is the part that matters.
Remember the DALBAR data: the average equity investor earned 16.54% in 2024 while the S&P 500 returned 25.05% [6]. That 8.48% gap comes from behavioral errors. Target-date fund investors mostly avoided those errors because the product is designed to be boring. Only 1% traded. The other 99% captured essentially all of their fund's returns.
The boring-on-purpose design is the product's most underrated feature. The less you interact with your retirement investments, the better they tend to perform. It's counterintuitive, almost insulting to our sense of agency. But the data doesn't care about our feelings.
When Target-Date Funds Are the Wrong Choice
Target-date funds aren't perfect for everyone.
Taxable brokerage accounts: Target-date funds rebalance internally, which can trigger capital gains distributions you can't control. In a taxable account, this creates tax bills you didn't plan for. Use target-date funds in tax-advantaged accounts (401(k), IRA) and build your own asset allocation in taxable accounts.
People with strong opinions about their allocation: If you want 20% international stocks instead of the 40% your target-date fund holds, you can't customize it. The allocation is locked. If customization matters, build your own portfolio using index funds. For that approach, see our guide to building a portfolio from scratch.
Near-retirees with other income sources: If you have a pension, Social Security, or rental income, your overall allocation might be more conservative than you need. A target-date fund designed for your retirement year might hold too few stocks given your total financial picture.
Mixing target-date funds with other investments: Holding a target-date fund alongside individual stock picks or sector funds undermines the whole point. The fund is designed as a complete portfolio. Adding more stocks on the side skews your allocation without the fund knowing.
The "Pick a Later Date" Strategy
Some advisors suggest buying a fund dated 5 to 10 years after your actual retirement to maintain higher stock exposure [7]. A person retiring in 2035 would buy the 2045 fund.
This works if you have high risk tolerance and other income sources. But it also means accepting a larger drawdown if markets crash right before retirement. If your $500,000 portfolio drops 30% at age 64 instead of 20%, that's a fifty thousand dollar difference. For some people, the extra growth justifies the risk. For others, it doesn't. Know your risk tolerance before taking this approach.
What Happens After the Target Date
The fund doesn't liquidate. It doesn't close. It keeps going.
Most "Through" funds gradually merge into a "Retirement Income" fund over the decade following the target date. This income fund typically holds about 30% stocks and 70% bonds, providing modest growth and steady income for the rest of your life.
If you're already past your fund's target date and still holding it, you're fine. The fund is still being managed. The allocation just isn't shifting much anymore.
Your Next Move
- Check if your 401(k) offers a low-cost target-date fund. Look for expense ratios under 0.15%. Vanguard, Fidelity Index, and Schwab Index series all qualify.
- Pick the fund closest to your retirement year. If you plan to retire in 2053, the 2055 fund is your match. If you want slightly more aggressive, choose 2060. If more conservative, choose 2050.
- Invest 100% of your 401(k) in it. Don't mix it with other funds. The target-date fund is designed to be your entire portfolio in that account.
- Use a different strategy for taxable accounts. Build a separate allocation using individual ETFs to avoid uncontrolled tax events.
- Revisit every 5 years. Not to trade, but to confirm the fund still fits your updated timeline. Life changes (early retirement, late-career shift) might warrant switching to a different target year. Use our compound interest calculator to check whether you're on pace.
References
- Vanguard. (2024). How America Saves 2024. https://institutional.vanguard.com
- Fidelity. (2025). Understanding Target-Date Funds: "To" vs. "Through" Glide Paths. https://www.fidelity.com
- Bankrate / Morningstar. (2025). Target-Date Funds: Pros and Cons. https://www.bankrate.com
- Morningstar. (2025). Target-Date Funds Have Delivered for Investors. https://www.morningstar.com
- 401(k) Specialist / Morningstar. (2025). TDFs Top $4 Trillion Mark in 2024. https://www.401kspecialistmag.com
- DALBAR, Inc. (2025). Quantitative Analysis of Investor Behavior (QAIB) 2025. https://www.dalbar.com
- U.S. Securities and Exchange Commission. (2025). Target Date Funds – Investor Bulletin. Investor.gov. https://www.investor.gov
