A target-date fund is a single fund that holds a mix of stocks and bonds and shifts it toward bonds as a chosen retirement year approaches. For most workplace savers it’s already the plan: at year-end 2025, 84% of participants in Vanguard-run plans used target-date funds when they were offered, and 61% of all participants held just one. A fee-only financial advisor does a different job. They plan around everything the fund can’t see, such as your other accounts, a spouse, a pension, taxes and withdrawals, for a median $2,000 for a one-time plan or $4,500 a year ongoing. The fund is often enough while you’re saving. It stops being enough when you have to start making decisions.
The short version
| Target-date fund | Fee-only financial advisor | |
|---|---|---|
| What it manages | The stock and bond mix of the account it’s in | Your whole financial picture |
| What it knows about you | One number: your expected retirement year | Your accounts, income, family, taxes and goals |
| How it changes over time | On a fixed schedule, the glide path | When your life or the rules change |
| Taxes and withdrawals | Not part of the job | Central to the job |
| Cost | The fund’s expense ratio | A median $2,000 per plan, $300 an hour or $4,500 a year |
| Where to find it | Your 401(k) or any brokerage | Fee-only planners, many of whom work by video |
What a target-date fund does well
The Labor Department describes the design plainly: target-date funds “automatically rebalance to become more conservative as an employee gets closer to retirement.” The shift over time is called the glide path. Early on the fund is mostly stocks; near the target date it holds more bonds and cash.
That’s a good default, which is why so many plans use it as one. In Vanguard’s 2026 report, 98% of plans that chose a default investment picked a target-date fund. It also keeps people from fiddling: only 1% of participants holding a single target-date fund made a trade in 2025.
Participants in plans Vanguard administers, year-end 2025
Source: Vanguard, How America Saves 2026
What a target-date fund can’t know
The fund knows one thing about you: the year in its name. It’s built for a typical person retiring then. It doesn’t see:
- Your other accounts. A target-date 401(k) next to a stock-heavy IRA and a spouse’s plan adds up to a mix the fund never chose.
- A pension or guaranteed income, which can let some people hold more in stocks, not less. See pension planning.
- When you’ll actually retire, or whether you’ll spend most of your savings in the first years or spread it over thirty.
- Taxes. Which account to draw from first, whether a Roth conversion makes sense, and when required minimum distributions start.
- How much to save, and when to claim Social Security. The fund invests what you put in. It doesn’t tell you whether that’s enough.
Two funds with the same date aren’t the same fund, either. The Labor Department notes “considerable differences among TDFs offered by different providers, even among TDFs with the same target date,” including glide paths and fees. Some take a “to retirement” approach and reach their most conservative mix at the target date. Others go “through” it and keep reducing stocks for years after. If you plan to withdraw slowly over retirement, that difference matters.
What each costs
A target-date fund’s cost is its expense ratio, taken from the fund each year. Your plan has to show it to you: federal rules require a comparison chart of the plan’s investments, given before you first invest and at least once a year, showing each fund’s yearly expenses as a percentage and in dollars per $1,000 invested. The DOL warns that target-date fund costs “can vary significantly.”
Small differences add up. In the Labor Department’s example, $25,000 left for 35 years at a 7% return grows to $227,000 if fees take 0.5% a year and $163,000 if they take 1.5%, 28% less.
Advice is priced differently, and doesn’t grow with your balance unless you choose a percentage fee:
The review row is three hours at the median $300. One plan while you’re saving and another in the years before retirement is a sensible rhythm for many savers. See one-time plan costs and one-time vs ongoing planning.
When a target-date fund is enough
- You’re early and most of your money is in one workplace plan. The fund handles the mix, and your saving rate matters more than anything else.
- You don’t want to make investment choices, and you know you won’t touch it in a downturn.
- Your situation is close to typical. One job, one plan, no pension, no big decision coming.
When it’s worth adding an advisor
- Retirement is within ten years. The withdrawal plan, Social Security timing and taxes in the first years matter more than the glide path. See advisors for pre-retirees.
- Your money is spread out. Old 401(k)s, IRAs, a spouse’s plan, a taxable account.
- You have a pension, stock pay or a business. Each changes how much risk the rest of your money should take.
- You’re leaving a job. Whether to keep the plan, roll it to an IRA or move it to the new employer is a decision a fund can’t make. See rollovers, and our guide to workplace 401(k) advice vs an independent advisor.
You don’t have to give up the fund to get advice. A good fee-only planner may tell you to keep it, pick a different year to take more or less risk, or use it in one account and something else in another.
How to check your target-date fund
- Find the glide path. The prospectus or fund fact sheet shows the stock share now, at the target date and after. The DOL suggests checking “when the fund will reach its most conservative asset allocation and whether that will occur at or after the target date.”
- Look up the expense ratio in your plan’s annual fee disclosure chart, in percent and in dollars per $1,000.
- Check what else you hold. If the fund is one of several in your account, it’s no longer setting your mix on its own.
- Add up every account. Your overall stock share across all of them is the number that matters.
If those answers raise questions, an hour with a planner is the cheapest way to settle them. Our guides to hourly planner costs and DIY investing vs a financial advisor cover the options, and advisors for retirement covers what the income plan involves.