🎯 In 30 seconds: A target-date fund is a whole portfolio in one fund, named for roughly the year you expect to retire. It starts mostly in stocks and moves toward bonds over time along a schedule called a glide path. Two funds with the same year can hold very different mixes, so the name alone tells you less than you think. Check the glide path, the fee and whether it goes to or through the target year.
How the glide path works
The fund’s manager sets a schedule for how much it holds in stocks at each point. Far from the date it is mostly stocks; it shifts toward bonds and cash as the date gets close. You do nothing: the fund rebalances and changes the mix itself.
Here is a made-up glide path to show the shape. Real funds publish their own in the prospectus, and they differ.
| Years until the target date | Stocks (example) | Bonds and cash (example) |
|---|---|---|
| 40 | 90% | 10% |
| 20 | 80% | 20% |
| 10 | 65% | 35% |
| 0 (the target year) | 50% | 50% |
| 7 years after | 30% | 70% |
“To” versus “through”
This is the difference people most often miss, and both the SEC and FINRA point to it.
- A “to” fund hits its most cautious mix in the target year and holds it from then on.
- A “through” fund keeps shifting after the date, and may not reach its most conservative mix until many years into retirement.
In practice a “to” fund is usually more conservative near the date, and a “through” fund keeps more in stocks for longer, which can mean a larger drop if markets fall around the time you retire. Neither is right for everyone. The question is when you will start taking money out and how fast. Look for the stock percentage at the target date in the fund’s prospectus or fact sheet.
Picking the year
Funds usually come in five-year steps. Most people choose the one closest to the year they expect to start withdrawing.
| Born in | 1998 |
| Plans to retire at about | 65, so around 2063 |
| Closest funds | 2060 or 2065 |
| Wants a bit more caution | Picks the earlier year (2060) |
| Comfortable with more swings | Picks the later year (2065) |
Choosing a year other than your own is a legitimate way to set your risk level. Just know that is what you are doing.
Fees: the part that varies most
Most target-date funds are funds of funds: they hold other funds inside. The prospectus fee table shows the total yearly cost, including the funds it holds, as one expense ratio. Costs differ a lot between families, from a few hundredths of a percent for index-based versions to well over half a percent for some actively managed ones.
Worked example with example fees. Jess puts $6,000 a year into a target-date fund for 30 years, and the funds’ investments earn 6% a year before fees.
| Yearly fee | Return after fee | Balance after 30 years |
|---|---|---|
| 0.10% | 5.90% | About $466,000 |
| 0.60% | 5.40% | About $427,000 |
Half a percentage point a year costs Jess about $39,000 over a career, and the two funds may hold almost the same things.
Common mistakes
- Holding two or three target-date funds. It does not diversify; it just blends glide paths.
- Adding a target-date fund to other stock and bond funds by accident, which changes the overall mix.
- Assuming the date is a promise. Reaching the year does not mean you have saved enough, and the fund can still lose money near or after that date.
- Holding one in a taxable account without noticing that its bond income is taxed each year. In tax-advantaged accounts this does not matter. See How investments are taxed.
- Ignoring what happens at the date. Some funds merge into a retirement-income fund when they hit their year. Check the new fund’s prospectus if yours does.
Checklist before you choose one
- Find the stock percentage now, at the target date and at the end of the glide path.
- Check whether it is a “to” or “through” design.
- Write down the total expense ratio and compare it with one or two alternatives.
- Make sure it is the only stock and bond fund in that account, or that you meant to combine it.
- Look at its worst calendar year in the fact sheet and ask whether you could sit through it.
- What is a glide path? Answer: The schedule the fund follows to shift from mostly stocks to more bonds over time.
- How does a “through” fund differ from a “to” fund? Answer: It keeps changing its mix after the target date instead of stopping at it.
- In Jess’s example, roughly what does a 0.50 point higher fee cost over 30 years? Answer: About $39,000.
- Someone born in 1998 wants a bit more caution. Which fund year might they choose? Answer: The earlier one, 2060 rather than 2065.