A fully managed portfolio that adjusts automatically as you age
A target date fund is a single mutual fund that automatically adjusts its mix of stocks and bonds based on your expected retirement year. If you plan to retire around 2055, you'd buy a "2055 Target Date Fund" and the fund does the rest.
These funds start aggressive (heavy on stocks) when retirement is far away and gradually shift to conservative (more bonds) as the target date approaches. This automatic adjustment is called a "glide path."
When you buy a target date fund, you're buying a "fund of funds" — it holds several underlying index funds covering U.S. stocks, international stocks, and bonds. The fund manager automatically rebalances and shifts the allocation over time.
For example, a 2060 fund today might be 90% stocks and 10% bonds. By 2040, it might be 70/30. By 2060, it could be 50/50 or even more conservative.
True "set it and forget it" investing — zero maintenance required
Vanguard target date funds have expense ratios of 0.08–0.15%
Available in most 401(k) plans and IRAs
Automatic rebalancing and glide path adjustment
Target date funds were created to solve a real problem: most people don't want to manage their own investments, and those who try often make costly mistakes like panic selling or never rebalancing.
Since the Pension Protection Act of 2006 made them the default investment in many 401(k) plans, target date funds have become the most popular retirement investment vehicle in America. They now hold trillions of dollars in assets.
If your 401(k) offers a low-cost target date fund (like Vanguard's), it's often the single best choice for retirement savings. Don't overthink it.
Zero maintenance required after initial purchase
Automatic rebalancing and glide path
Built-in diversification across stocks and bonds
Prevents common behavioral mistakes
Available in most retirement plans
Slightly higher fees than DIY three-fund portfolio
One-size-fits-all — doesn't account for individual circumstances
You can't customize the allocation
Some providers charge high fees (check the expense ratio)
May be too conservative or aggressive for your specific situation
Target date funds are ideal for investors who want a simple, hands-off approach to retirement investing.
Hands-off investors: If you don't want to think about investing at all, this is your fund.
401(k) participants: Often the best option available in employer-sponsored retirement plans.
Beginners: No knowledge of asset allocation required — just pick your retirement year.
Estimate your retirement year: Choose the year closest to when you expect to retire (e.g., 2055, 2060).
Check your plan options: If using a 401(k), look for the lowest-cost target date fund series available (Vanguard, Fidelity, or Schwab).
Invest your entire contribution: Put 100% of your retirement contributions into the single target date fund.
Check annually: Verify the fund is still appropriate. If you change your retirement timeline, switch to a different target year.