A 0.12% Fund and a 0.68% Fund Walk Into Your 401k
A target-date fund (TDF) from Vanguard, Fidelity’s index series, or Schwab’s index series is a lazy win. It picks a stock and bond mix for you, shifts it toward bonds as you age, and rebalances it, all for 0.08% to 0.12% a year. For most tech workers with a 401k, that beats most portfolios you would build by hand and then forget to maintain.
The trap has three doors. First, the expensive active version of the same fund family, which has nearly the same name and costs 0.68% instead of 0.08% to 0.12%. Second, holding a TDF in a taxable brokerage account, where it generates tax bills you did not ask for. Third, holding a TDF next to other funds, which breaks the one thing it does. Walk through any of those doors and your lazy win turns into a slow leak.
What You Are Actually Buying
A TDF is a fund of funds. Pick the one with your retirement year in the name, say a 2055 fund, and it holds a handful of index funds (US stocks, international stocks, US bonds, international bonds) in a ratio that changes over time. That ratio schedule is the glide path.
Vanguard publishes its glide path in plain numbers. As of October 2026, its workplace site says the default path starts at 90% stocks at age 20, reaches 50% stocks at age 65, and lands at 30% stocks and 70% bonds at age 72. The fund page for the 2055 fund says the same thing in different words: it keeps adjusting for about seven years after the target date, then looks like the Target Retirement Income Fund.
That is a “through” glide path. It does not stop at your retirement year. It keeps getting more conservative for years afterward. A “to” glide path stops changing on the target date and holds a fixed mix from there. Which style is better is a real debate, but you only need to know which one you own. A through fund at 65 is still shedding stocks. A to fund at 65 has already landed.
Fidelity’s index series prospectus describes the through style too: the fund keeps adjusting until it reaches an allocation similar to the Freedom Index Retirement Fund. I am not going to quote you equity percentages for Fidelity or Schwab at the target year, because their prospectuses show the glide path as a chart and I would rather leave out a number than guess it. Open the prospectus, find the chart, and read the stock percentage at your target year and at the final landing point. That one number tells you more about your real risk than the name on the fund.
The Fee Math (Check It Yourself)
Here are the current expense ratios for 2055 funds, all pulled from fund company or SEC filings in October 2026:
| Fund | Ticker | Expense ratio |
|---|---|---|
| Vanguard Target Retirement 2055 | VFFVX | 0.08% |
| Fidelity Freedom Index 2055 (Investor) | FDEWX | 0.12% |
| Schwab Target 2055 Index | SWYJX | 0.08% net (0.13% before a fee waiver) |
| Fidelity Freedom 2055 (active) | FDEEX | 0.68% |
Morningstar’s 2026 Target-Date Fund Landscape puts the asset-weighted average expense ratio for target-date mutual funds at 0.27% at the end of 2025, down from 0.55% in 2015. So the average fund is not the cheap index series. The cheap index series is well below average, and the active ones sit well above it.
Now the dollars. Assume you contribute $30,000 a year (your own deferral plus a match, which is a normal tech-worker number) for 25 years, starting at zero, with a 7% gross return and contributions at the start of each year. Each year the balance is (balance + $30,000) x (1 + 0.07 minus the fee). Here is what I computed in Python:
| Expense ratio | Balance after 25 years |
|---|---|
| 0.00% (reference) | $2,030,294 |
| 0.08% (VFFVX) | $2,005,626 |
| 0.12% (FDEWX) | $1,993,417 |
| 0.68% (FDEEX) | $1,830,889 |
The gap between the Vanguard fund and the active Fidelity fund is $2,005,626 minus $1,830,889, or $174,737. You contributed $750,000 either way. The only difference is which fund name you picked on a dropdown menu. That is 8.7% of your final balance gone to fees.
Zoom in on a single year to see why it stings. At a $500,000 balance, 0.68% costs $3,400 a year and 0.08% costs $400. And the difference between the two cheap funds, 0.08% and 0.12%, is $12,209 over 25 years. Worth a glance, not worth switching brokerages over.
This assumes the active fund earns the same gross return as the index fund. An active manager can beat the index, but the fund starts each year 0.60 percentage points behind.
The Name-Alike Trap
Fidelity runs two target-date series with nearly identical names. “Fidelity Freedom 2055” (FDEEX) is the older, actively managed series. “Fidelity Freedom Index 2055” (FDEWX) holds index funds. Their prospectuses filed in May 2026 show 0.68% for the first and 0.12% for the Investor class of the second. Schwab does the same with a plain “Schwab Target 2055” series next to its index series. If you pick by the year and the family name alone, you can land on the expensive one.
There is no villain in this story, only a naming accident that costs you six figures. The fix takes thirty seconds: look for the word “Index” in the fund name, then confirm the expense ratio on the fund’s own page or in your plan’s fee disclosure.
Your 401k Menu Might Only Offer the Pricey One
Many 401k plans do not hold mutual funds at all. They hold collective investment trusts (CITs), which are pooled funds that are not registered with the SEC, so they usually have no public ticker and you cannot look them up on Yahoo Finance. The menu might say “BigRecordkeeper Target Date 2055 CIT” and give you nothing else.
You have a legal right to the real cost. Under the Department of Labor’s participant disclosure rule (29 CFR 2550.404a-5), the plan must give you a comparative chart that lists the total annual operating expenses of each investment option, expressed as a percentage and as a dollar amount per $1,000 invested. The plan has to deliver it before you can first direct your investments and at least once every 14 months after that. Search your email and your benefits portal for “404a-5” or “investment comparative chart.”
Read the number like this: if the chart says $6.80 per $1,000, that is 0.68%. If it says $0.80, that is 0.08%. If your plan menu offers only a TDF at 0.60% or more, you have two options. Compare it against the other funds on the menu, since a plain S&P 500 index fund at 0.02% plus a bond index fund may beat it. And write to the plan sponsor. Plan committees change fund lineups when employees ask, and “our TDF costs about eight times what the Vanguard version costs” is the kind of line that gets a committee meeting scheduled.
The Taxable Account Problem
Put a TDF in a 401k, IRA, or Roth IRA and the internal trading does not matter, because nothing is taxed inside the account, and qualified Roth withdrawals are never taxed. Put the same fund in a regular brokerage account and you have signed up for two tax leaks.
The first is bond interest. A bond fund pays out interest that is taxed as ordinary income each year, even if you reinvest it. A fund within ten years of its target date holds a large bond slice. As a made-up illustration, say $200,000 sits in a fund that is 40% bonds yielding 4%. That is $3,200 of interest a year. At a 24% federal bracket, you owe $768 a year before state tax, on a fund you thought was “set and forget.”
The second is capital gains distributions. Funds that sell holdings must pass the gains to shareholders, and shareholders in taxable accounts owe tax on them. Vanguard produced a famous example. On December 11, 2020, it lowered the minimum investment for its Institutional Target Retirement Funds from $100 million to $5 million. Many retirement plans moved from the Investor shares to the cheaper Institutional shares, and the Investor funds had to sell appreciated holdings to pay them out. Investors who stayed in taxable accounts got historically large capital gains distributions.
The SEC found that the Investor funds’ 2020 and 2021 prospectuses did not disclose that risk. In January 2025, Vanguard agreed to pay $106.41 million, which included a $13.5 million civil penalty. The SEC announced that $92.91 million of that was relief ordered by parallel settlements with the New York Attorney General, the Connecticut Department of Banking, and the New Jersey Attorney General. Vanguard neither admitted nor denied the findings. If you only hold index TDFs in tax-advantaged accounts, none of this touched you. If you held one in a taxable account that year, it did.
The rule is simple. TDFs belong in tax-advantaged accounts. In a taxable account, use a total-market stock index fund or ETF and add bonds only if you need them.
Do Not Mix a TDF With Other Funds
A TDF is a complete portfolio. You are paying the fund to own the allocation decision. Add a second fund and you take over the allocation, without telling the fund.
Example. You hold a 2055 fund at roughly 90% stocks. You also pick up a $20,000 S&P 500 fund and a $10,000 growth fund in the same 401k, because your coworker said so. Your real stock allocation is now above 90%, your US-to-international split is skewed, and the glide path can no longer fix it, because it only manages its own balance. Ten years later, the TDF has 80% stocks, but your combined portfolio is still near 90% because your side funds never shifted.
Pick one of two routes. Hold one TDF and nothing else, or skip the TDF and build the allocation yourself. Do not hold both.
When the DIY Three-Fund Portfolio Wins (and When It Does Not)
The three-fund portfolio is a US total stock fund, an international total stock fund, and a US bond fund. Vanguard’s current expense ratios, as of October 2026 on its fund pages: Total Stock Market (VTSAX) 0.04%, Total International (VTIAX) 0.09%, and Total Bond Market (VBTLX) 0.04%.
At a 90% stock, 10% bond mix split 54% US, 36% international, 10% bonds, the blended cost is 0.54 x 0.04% + 0.36 x 0.09% + 0.10 x 0.04%, which is about 0.058%. Compare that with 0.08% for the TDF. On a $500,000 balance, that is a difference of about $110 a year. An hour or two of rebalancing each year, plus the cost of skipping it after a bad year, can easily outweigh $110.
DIY wins in three cases. Your plan does not offer a cheap TDF at all. You want a different stock-to-bond ratio than any vintage offers. Or you want to hold your bonds in a different account than your stocks, which a single TDF cannot do. DIY loses when the cost gap is a few hundred dollars, you rebalance late or never, or you would sell in a panic. A TDF takes the rebalancing decision away from you, which is the point.
Pick a Different Vintage on Purpose
Your fund does not have to match your actual retirement year. Each vintage sits one step along the same glide path. Choose a vintage later than your retirement year and you hold more stocks. Choose an earlier one and you hold more bonds.
Say you plan to retire in 2055 but can tolerate big swings and have other income. A 2060 fund shifts you toward stocks. If a 30% drop would make you sell, a 2050 fund is the better pick. The point is that you choose one vintage on purpose and then stay in it. Do not hop between vintages after a bad quarter.
Common Questions
Should I hold a target-date fund in a Roth IRA?
Yes, a target-date fund works well in a Roth IRA. A Roth IRA has no yearly tax on dividends, interest, or capital gains distributions, so the fund’s internal trading costs you nothing in taxes. Check that you picked the index series, with an expense ratio near 0.08% to 0.12%, not the active one.
Is a target-date fund better than a three-fund portfolio?
For most 401k savers, a target-date fund is better, because the cost gap is small and the fund rebalances for you. A three-fund portfolio on Vanguard funds blends to about 0.06% against 0.08% for the TDF, about $110 a year on $500,000. Choose DIY only if you will actually rebalance.
What is the difference between Fidelity Freedom and Fidelity Freedom Index?
Fidelity Freedom funds are actively managed and cost 0.68% for the 2055 fund (FDEEX), while Fidelity Freedom Index funds track indexes and cost 0.12% for the 2055 Investor class (FDEWX). Both carry the Freedom name. The gap between those two funds is about $162,500 over 25 years at $30,000 a year and a 7% gross return.
Can I find out what my 401k target-date fund really costs?
Yes. Your plan must give you a comparative chart under Department of Labor rule 29 CFR 2550.404a-5, showing each investment’s total annual operating expenses as a percentage and per $1,000 invested. Look for the “investment comparative chart” in your benefits portal or your annual plan notice, or ask HR for it.
