By Marc Gilman
Questions? Call (800) 927-9326 or email
Key Takeaways
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A target-date fund automatically shifts from riskier to more conservative investments as a chosen date — usually retirement — approaches. It’s built to be a set-it-and-forget-it option inside a 401(k) or IRA.
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The fund’s name tells you its target year, and most providers offer them in 5-year intervals. Two funds with very different target dates from the same provider often hold nearly identical underlying assets, just in very different proportions.
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These funds cost more than a plain index fund. Because a target-date fund is a “fund of funds,” you pay both the target-date fund’s own fee and the expense ratios of everything it holds underneath.
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A target-date fund is an investment, not an annuity. There’s no guarantee of a specific income or return — it’s still subject to market risk and can underperform.
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Not all same-year funds are the same fund. A 2045 target-date fund from one provider might lean toward domestic stocks and investment-grade bonds, while another provider’s 2045 fund leans international with higher-yield debt. The date matching doesn’t mean the holdings match.
How a Target-Date Fund Actually Works
A target-date fund is designed around a single specific goal — typically your retirement year — and automatically adjusts its mix of investments over time to match how much risk makes sense at each stage. Early on, it leans into higher-growth, higher-risk assets like domestic and global stocks. As the target date gets closer, the fund’s managers gradually shift more of the portfolio into conservative fixed-income holdings like bonds and cash equivalents.
This shift follows what’s called a glide path — the planned trajectory from aggressive to conservative allocation over the life of the fund. Managers typically review and rebalance the portfolio at least annually to stay on that path.
“Through” Funds vs. “To” Funds
What happens once you actually hit the target date depends on which type of fund you’re holding:
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“Through” funds keep adjusting toward even more conservative holdings for years after the target date passes, on the assumption you’ll keep drawing down the fund well into retirement.
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“To” funds stop adjusting once the target date arrives — the allocation at that point is the allocation that stays, indefinitely.
Neither structure is inherently better, but it’s worth knowing which one you actually hold, since it affects how your portfolio behaves for years after your official target date.
What a Target-Date Fund Gets Right
The core appeal is real: a target-date fund lets you put your long-term retirement investing on autopilot. Choose the fund closest to your expected retirement year, and the age-appropriate asset allocation adjusts itself — no annual rebalancing decisions required on your part. For many people, a single target-date fund can reasonably serve as their entire long-term retirement holding, without needing to layer on additional funds to diversify.
What a Target-Date Fund Gets Wrong for Some People
The same autopilot feature that makes these funds convenient is also their biggest limitation. The fund’s glide path is built around one assumption — that you’ll retire on roughly the date in the fund’s name — and it has no way to adjust if your actual plans change. If you end up retiring significantly earlier, or decide to keep working well past your original target, the fund’s risk level may no longer match your real timeline.
It’s also worth being clear about what a target-date fund is not: it’s an investment portfolio, not a guarantee. Unlike an annuity, there’s no promised income stream and no protection against a market downturn — the fund is still fully exposed to investment risk at every stage, even as it becomes more conservative.
The Fee Question Worth Checking
Because a target-date fund is technically a “fund of funds” — a mutual fund that holds other mutual funds or ETFs — you’re generally paying two layers of cost: the target-date fund’s own management fee, plus the expense ratios of everything it holds underneath. If a fund is stacked with actively managed underlying holdings, that double layer can add up meaningfully over decades of investing.
The good news is that this has been improving. Many of today’s target-date index funds now carry expense ratios of 0.10% or lower — genuinely low-cost, especially compared to older or more actively managed target-date products. It’s worth checking a specific fund’s actual expense ratio rather than assuming all target-date funds are priced the same.
Same Target Year, Different Fund
Two 2045 funds from two different companies are not the same investment just because they share a name. One might weight heavily toward domestic stocks and investment-grade bonds; another might lean international with lower-grade, higher-yield debt. As a real example, Vanguard’s Target Retirement 2065 Fund holds roughly 90% stocks and 10% bonds, while its 2025 Fund — much closer to its target date — holds a nearly even 52%/47% split between stocks and bonds, despite both funds carrying an identical 0.08% expense ratio. The date on the label tells you the timeline; it doesn’t tell you the actual holdings. Checking a fund’s specific asset composition against your own comfort with risk is a step worth taking rather than skipping.
What If Your Retirement Year Doesn’t Match?
Most target-date funds are offered in 5-year increments — 2030, 2035, 2040, and so on. If your expected retirement year falls in between, there’s no strict rule: you can round to the nearest fund (choosing the earlier one for a bit less risk, or the later one for a bit more growth potential), or split your allocation between the two surrounding funds to land somewhere in between.
Questions Worth Asking
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Do you know whether your 401(k)’s target-date fund is a “through” fund or a “to” fund, and how that affects your allocation after retirement?
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Have you actually checked the fund’s specific expense ratio and underlying holdings, rather than assuming it matches similarly named funds elsewhere?
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Does the fund’s target year still match your realistic retirement timeline, or has your plan shifted since you first selected it?
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If you’re using a target-date fund as your only long-term retirement holding, are you comfortable with that concentration, or would some diversification alongside it make sense for your situation?
What To Do Next
If you want help reviewing your 401(k) or IRA’s target-date fund lineup — checking fees, actual holdings, and whether the glide path still matches your real retirement timeline — let’s go through it together.
Questions? Call (800) 927-9326 or email
Prefer we reach out to you instead? Complete our Permission to Contact form and a licensed Gilman Agency agent will follow up.
Sources: Investopedia, “Target-Date Funds Explained: Risk Management and Real-Life Examples” by Troy Segal (updated July 2026); Vanguard, fund fact sheets for Target Retirement 2065 Fund (VLXVX) and Target Retirement 2025 Fund (VTTVX), data as of May 31, 2024.
This article is for general educational purposes and reflects information available as of the publication date. Fund fees, asset allocations, and available target-date years vary by provider and change over time — always review a fund’s current prospectus and confirm details directly with your plan provider before investing. This is not a recommendation regarding any specific fund, and is not tax, legal, or investment advice. Consult a licensed advisor for guidance specific to your situation.
