Target Date Fund
Quick Definition
A target date fund is a diversified mutual fund that automatically adjusts its asset allocation over time, starting with a high percentage of stocks for growth and gradually shifting toward bonds and cash for stability as the target retirement year approaches. You pick the fund closest to your expected retirement year (such as Target Retirement 2055) and the fund manager handles everything else.
What It Means
Target date funds solve the biggest problem in retirement investing: most people do not know how to build and maintain an appropriate portfolio, and even those who do often neglect to rebalance. A target date fund does both automatically. You choose a fund with a year matching when you expect to retire, and the fund gradually becomes more conservative as that year approaches. This gradual shift is called the glide path.
The target date fund market reached $4.8 trillion in assets by the end of 2025, growing 20.3 percent over the prior year, according to Morningstar's 2026 Target-Date Fund report. The industry has grown 11.9 percent annualized over the past decade. Vanguard leads the market with $1.8 trillion, or 37 percent of all target date assets. Five firms control 80 percent of the market: Vanguard, Fidelity, Capital Group, State Street, and BlackRock.
These funds dominate 401(k) plans because of the Pension Protection Act of 2006, which created the Qualified Default Investment Alternative (QDIA) designation. If a 401(k) participant does not choose their investments, the plan can default them into a target date fund and satisfy fiduciary obligations. According to the Investment Company Institute, $3.3 trillion of the $9.9 trillion in 401(k) assets at the end of Q1 2026 was held in equity funds, and target date funds (classified as hybrid funds) held $1.6 trillion in 401(k) plans.
Collective investment trusts (CITs) have overtaken mutual funds as the dominant vehicle for target date strategies, representing 54 percent of total target date assets at the end of 2025, up from 52 percent the prior year. CITs are only available in employer-sponsored retirement plans and typically have lower costs than mutual funds because they are not subject to the same regulatory requirements.
How It Works
The Glide Path
The glide path is the schedule by which the fund shifts from stocks to bonds over time. It is the defining feature of a target date fund. A typical glide path for a fund targeting retirement in 2055 (about 30 years away) looks like this:
| Years to Retirement | Stock Allocation | Bond Allocation | Cash Allocation |
|---|---|---|---|
| 40 | 93% | 7% | 0% |
| 30 | 90% | 10% | 0% |
| 20 | 75% | 23% | 2% |
| 10 | 60% | 35% | 5% |
| 5 | 50% | 42% | 8% |
| At retirement | 40% | 50% | 10% |
| 15 years after | 30% | 60% | 10% |
The median equity exposure for investors 45 years from retirement was 93 percent at the end of 2025, according to Morningstar, up from 89 percent a decade earlier. Fund managers have become more aggressive in the early saving years because the long-term return advantage of stocks over bonds is well documented. A portfolio that is 90 percent stocks has historically returned about 9 to 10 percent annually, while a 50 percent stock portfolio has returned about 7 to 8 percent.
To vs. Through Glide Paths
There are two philosophies for glide path design:
- To retirement (to glide path): The fund reaches its most conservative allocation at the target date. After that, the allocation stays fixed. This assumes you withdraw your money at retirement and invest it elsewhere.
- Through retirement (through glide path): The fund continues to become more conservative for 10 to 15 years after the target date. This assumes you stay invested in the fund during retirement and withdraw gradually. Most major fund families use a through glide path because most retirees do not withdraw everything at once.
What Is Inside the Fund
A target date fund is a fund of funds. It holds a mix of underlying stock and bond funds managed by the same company. A Vanguard Target Retirement 2055 fund, for example, holds:
- Vanguard Total Stock Market Index Fund (US stocks)
- Vanguard Total International Stock Index Fund (international stocks)
- Vanguard Total Bond Market II Index Fund (US bonds)
- Vanguard Total International Bond Index Fund (international bonds)
The fund automatically rebalances these underlying holdings to maintain the target allocation. When stocks outperform bonds, the fund sells some stocks and buys bonds to return to the target mix. This rebalancing happens continuously, which is something most individual investors fail to do on their own.
Cost Considerations
Target date fund expenses vary widely. The expense ratio includes the cost of the target date fund wrapper plus the weighted average cost of the underlying funds. Vanguard's target date funds have expense ratios around 0.08 percent, among the lowest in the industry. Some actively managed target date funds charge 0.50 percent or more. Over 30 years, that difference is enormous:
| Expense Ratio | $10,000 Initial, 7% Return, 30 Years | Lost to Fees |
|---|---|---|
| 0.08% | $75,500 | $2,100 |
| 0.30% | $70,800 | $6,800 |
| 0.50% | $66,800 | $10,800 |
| 0.75% | $62,200 | $15,400 |
A 0.50 percent expense ratio costs you about $10,800 more than a 0.08 percent ratio over 30 years on a $10,000 initial investment. On a $100,000 investment, that is $108,000 lost to fees. Always check the expense ratio before choosing a target date fund. Read our guide on what is an expense ratio for more details.
Real-World Examples
Example 1: The Default 401(k) Investor
Alex is 30 years old and enrolls in his company's 401(k) plan. He does not want to research investments, so he accepts the default option: a target date fund for 2061 (his approximate retirement year). The fund starts at 90 percent stocks and 10 percent bonds. Alex contributes $500 per month. Over 35 years at 7 percent average return:
| Age | Fund Allocation | Balance |
|---|---|---|
| 30 | 90% stocks / 10% bonds | $0 |
| 40 | 85% stocks / 15% bonds | $86,000 |
| 50 | 70% stocks / 28% bonds / 2% cash | $245,000 |
| 60 | 50% stocks / 42% bonds / 8% cash | $610,000 |
| 65 | 40% stocks / 50% bonds / 10% cash | $815,000 |
Alex never had to make a single investment decision. The fund handled allocation, rebalancing, and risk reduction automatically. His final balance of $815,000 could provide about $32,600 per year at a 4 percent withdrawal rate.
Example 2: Comparing Two Target Date Funds
Not all target date funds are the same. Here is a comparison of two 2055 target date funds from different providers:
| Feature | Fund A (Passive) | Fund B (Active) |
|---|---|---|
| Expense ratio | 0.12% | 0.55% |
| Stock allocation at start | 90% | 85% |
| Stock allocation at retirement | 40% | 50% |
| Glide path type | Through | Through |
| Underlying funds | Index funds | Active + index |
| 10-year annualized return | 9.2% | 8.6% |
Fund A outperformed Fund B by 0.6 percent annually over 10 years, largely due to lower fees. Over 30 years, that 0.6 percent difference compounds to roughly $130,000 more on a $500 monthly contribution. Read our guide on target date funds explained for a deeper comparison.
Example 3: The DIY Alternative
Some investors prefer to build their own portfolio instead of using a target date fund. A common alternative is the three-fund portfolio:
| Component | Fund | Allocation (age 30) | Allocation (age 60) |
|---|---|---|---|
| US stocks | Total Stock Market Index | 60% | 35% |
| International stocks | Total International Index | 25% | 15% |
| Bonds | Total Bond Market Index | 15% | 50% |
This approach requires manual rebalancing once or twice per year but typically costs less than 0.10 percent in expense ratios. The tradeoff is that you must manage it yourself. Read our guide on the three-fund portfolio for implementation details.
Key Points to Remember
- Target date funds automatically shift from stocks to bonds as you approach retirement. You pick the year and the fund handles the rest.
- The target date fund market held $4.8 trillion at the end of 2025, with Vanguard controlling 37 percent of assets.
- Glide paths have become more equity-heavy over the past decade. The median equity allocation 45 years from retirement is now 93 percent, up from 89 percent.
- Most target date funds use a "through" glide path, continuing to de-risk for 10 to 15 years after the target date.
- Expense ratios range from 0.08 percent to over 0.75 percent. Over 30 years, the difference can cost you more than $100,000 on a large balance.
- Target date funds are the default investment in most 401(k) plans due to QDIA rules from the Pension Protection Act of 2006.
- Collective investment trusts now hold 54 percent of target date assets, surpassing mutual funds.
Common Mistakes to Avoid
- Picking the wrong target date: If you plan to retire at 60, do not pick a 2065 fund just because you are young. Choose the fund that matches your expected retirement year so the glide path aligns with your timeline.
- Owning multiple target date funds: Some investors own a target date fund alongside other stock and bond funds, which defeats the purpose. A target date fund is designed to be your entire portfolio. If you add other funds, you are changing the allocation the fund was designed to maintain.
- Ignoring the expense ratio: A 0.55 percent expense ratio costs about $108,000 more than 0.08 percent over 30 years on a $100,000 investment. Always compare costs. The SEC requires funds to disclose expense ratios in their prospectuses.
- Assuming all target date funds are the same: Glide paths, stock allocations, and underlying investments vary significantly between providers. A 2055 fund from Vanguard may have 90 percent stocks while a 2055 fund from another provider has 80 percent. Compare before choosing.
- Not understanding the through glide path: Your fund does not stop adjusting at the target date. It continues to become more conservative for years after. If you want a different allocation in retirement, you may need to switch funds.
- Holding the fund in a taxable account without understanding tax efficiency: Target date funds rebalance internally, which can generate capital gains distributions in taxable accounts. They are best held in tax-advantaged accounts like 401(k)s and IRAs.
Related Concepts
Target date funds are a tool for retirement planning that automates asset allocation and rebalancing. They are the default investment in most 401(k) plans and are available as either mutual funds or collective investment trusts. They compete with ETFs and DIY portfolios like the three-fund approach. The expense ratio is the key cost metric to compare. Target date funds are particularly useful for investors who want a hands-off approach to retirement planning. Use our 401(k) calculator and investment return calculator to project your savings growth. Read our guides on target date funds explained, ETF vs mutual fund, what is asset allocation, how to rebalance your portfolio, and the three-fund portfolio.
Frequently Asked Questions
Q: Are target date funds guaranteed to grow my money? A: No. Target date funds invest in stocks and bonds, which fluctuate in value. A target date fund can lose money, especially in the early years when the stock allocation is high. The fund reduces risk as the target date approaches, but it never eliminates market risk entirely.
Q: Should I use a target date fund or build my own portfolio? A: If you want simplicity and do not want to manage your investments, a target date fund is an excellent choice. If you want lower costs and more control over your allocation, a DIY three-fund portfolio may be better. The performance difference is usually small, but the cost difference can be significant over decades. Read our guide on ETF vs mutual fund for more on fund selection.
Q: What happens to my target date fund after the target date? A: If your fund uses a through glide path (most do), it continues to become more conservative for 10 to 15 years after the target date, eventually reaching a stable retirement allocation of around 30 percent stocks. You can keep holding it during retirement or switch to a different investment.
Q: Can I buy a target date fund outside of a 401(k)? A: Yes. Target date mutual funds are available through most brokerages in IRAs and taxable accounts. CITs are only available in employer-sponsored plans. If buying in a taxable account, be aware that rebalancing can generate capital gains distributions.
Q: How do I compare target date funds from different providers? A: Compare three things: expense ratio, glide path (stock allocation at different points), and performance. The SEC's investor guidance on mutual funds provides a framework for evaluating fund costs and performance. Morningstar also publishes detailed target date fund ratings and comparisons.
