You picked the fund and skipped the mix. The search bar hands you a ticker - one stock, one sector, one story - and it never asks the question that decides the rest: how many index funds should I have. The answer is three, one per asset class, and this page builds the 3-fund portfolio the dated way: the 2026 fact sheet for each fund, the allocation rows by age, and the 30-year cost of the whole mix, counted.
What three funds cover
One US total-market fund holds the entire US stock market - large, mid, small and micro caps - in a single ticker. One total-international fund holds the rest of the world’s stocks, outside the US. One total-bond fund holds the US taxable investment-grade bond market. Together, the three cover the whole investable universe - US stocks, non-US stocks, US bonds - with no sector, no name, no manager in the middle. A fourth fund does not add coverage; it adds overlap. That is what a 3-fund portfolio is: a total-market allocation, built from three index funds. The build below is dated, and it is costed.
The dated 2026 picks
Here is the table, fund by fund, from the 2026 documents. Each fund fills one slot in the mix, and the fee is the number that compounds - the same number the site counted fund by fund in the index fund vs ETF wrapper comparison, here as an input to the allocation, not the subject of it.
| Slot | Fund (2026) | 2026 fee | Minimum | What it covers | Source, dated |
|---|---|---|---|---|---|
| US stocks | Vanguard Total Stock Market Index Fund Admiral (VTSAX), since 1992 | 0.04% | $3,000 | The entire US stock market | Fund data, September 25, 2026 close |
| International stocks | Vanguard Total International Stock ETF (VXUS), since 2011 | 0.05% | $0 | The stock market outside the US | Fund data, September 28, 2026 |
| Bonds | Vanguard Total Bond Market ETF (BND), since 2007 | 0.03% | $0 | The US taxable investment-grade bond market | Vanguard fact sheet, June 30, 2026 |
Read the dates first, because the date is what makes the table re-datable. The VTSAX 0.04% is the 2026 fund-data figure, the same one the site counted in the wrapper comparison, and the $3,000 gate belongs to the mutual fund wrapper - the only gate in the table. The VXUS and the BND are ETFs: the entry is one share, fractional, no minimum, the $0 entry the wrapper article counted. The BND’s 0.03% comes from its own fact sheet of June 30, 2026: $159.8 billion under the ETF, 14,173 bonds, 5.8 years of average duration. The VXUS’s 0.05% is its September 28, 2026 fund-data figure, $165 billion of assets, and the fund’s own description says it covers 99 percent of global market capitalization outside the US. The funds fill the slots. The percentage, next, is the decision.
The mix, by age
The worksheet holds the international slot at 10 percent of the portfolio across all three rows, on purpose. The one variable in each row is the stock/bond split, and that is the decision a beginner actually makes; the regional choice stays out of the count, so the percentage can be set without a second argument.
| Age | US stocks (VTSAX) | International (VXUS) | Bonds (BND) | Stock/bond |
|---|---|---|---|---|
| 30 | 80% | 10% | 10% | 90/10 |
| 50 | 60% | 10% | 30% | 70/30 |
| 65 | 40% | 10% | 50% | 50/50 |
Each row carries a dated reason, not the reflex that older means more bonds.
- Age 30 - 90/10. The portfolio is thirty years from its first withdrawal, and the 30-year test window of the 1994 study starts at retirement, not at 30 (the 4% rule, stress-tested). At 30, the 10% bond slot is for volatility tolerance, not for spending: there is nothing to spend yet.
- Age 50 - 70/30. The withdrawal window is now in range. The 30% bond slot is sized against the worst thirty-year window in the 1926-2014 rolling data, the 3.5 percent edge the site runs (the calculator behind the retirement number), so the first decades of withdrawals do not depend on the equity leg through that window.
- Age 65 - 50/50. The 2024 life table puts 19.7 years past age 65, to 84.7, and 43.8 percent of Americans past 85 (the retirement number). The plan must outlive the test window - that is why the site carries the 3 percent edge at all - and the 50% bond slot is what carries the first decades of it.
What the mix costs, counted over 30 years
Same dated set the site runs on: $10,000, invested once, no contributions added, thirty years. Growth is 6 percent real, the long-run US equity record since 1926, as the center case, and 3 percent real as the planning floor. The fee is deducted from growth every year, because that is how a fee works. The portfolio’s fee is the mix-weighted average of the three slots, and the table counts it.
| Age (slot mix) | Mix-weighted fee | $10,000 after 30 years, 6% real | 30-year fee cost, 6% real | $10,000 after 30 years, 3% real | 30-year fee cost, 3% real |
|---|---|---|---|---|---|
| 30 (80/10/10) | 0.040% | $56,788 | $647 | $23,991 | $281 |
| 50 (60/10/30) | 0.038% | $56,820 | $614 | $24,005 | $267 |
| 65 (40/10/50) | 0.036% | $56,853 | $582 | $24,019 | $253 |
For the baseline, the same $10,000 at a zero-fee mix reaches $57,435 at 6 percent real and $24,273 at 3 percent - the same baseline the wrapper article counted. The fee cost is the gap.
Three things to read from the table. The mix costs less than any single slot on its own, because the 0.03% bond slot is what pulls the weighted number down - and the older the mix, the cheaper it is: 0.040% at 30, 0.036% at 65. At 30, the mix lands exactly on the US slot’s own 0.04%: the international slot’s extra basis point is cancelled by the bond slot’s discount, and that is the arithmetic of the percentages, not a rounding coincidence to smooth over. On a fixed $10,000 the count is small, the same limit the wrapper article names; it scales dollar for dollar with the account, and the $10,000 count is the floor of the cost, not its shape.
What breaks the mix: the one story
Three funds do not remove concentration. They remove it across asset classes, and the tilt inside a fund stays.
The US slot is an index, and the index has a tilt: the S&P 500, the index the US slot’s largest holdings are built on, carried information technology at 32.9 percent of the fund, per the fund’s May 2026 fact sheet, in the wrapper article’s dated table. A 30 percent fall in that one sector, inside the 80 percent US slot of the age-30 mix, is 24 points off the whole portfolio: 80 percent times 30 percent, counted, not felt. The one story - the sector, the name, the ticker the search bar pushes - takes the whole portfolio down when it sits inside a fund, because no mix percentage reaches in there. The stocks are the noise; the mix is the control over the stock/bond split, and inside the fund the index decides.
What breaks the mix: the fee
The fee is the other way the mix breaks, and it is the one that counts clean. If one slot in the age-30 mix is an actively managed fund at 1.0 percent - a stated planning assumption, the same device the site uses for its 3 percent growth floor - the mix-weighted fee moves from 0.040% to 0.135%, and the 30-year cost on the fixed $10,000 moves from $647 to $2,154 at 6 percent real, from $281 to $936 at the floor. All three slots active at 1.0 percent: $14,215 at 6 percent real, $6,159 at the floor, on the same $10,000. The index does the work. The manager sets the price. The wrapper article is the same count at the wrapper layer; this one is the mix layer.
The rebalance
The mix is a setting, not a one-time act. The market moves, and the 90/10 mix drifts with it - a long equity run pushes the stock share up and the bond share down, and the drift is silent: no statement flags it. The worksheet keeps the mix with one rule, the same at every age: check the split once a year, and bring any leg back when it has moved more than 5 points from the row above.
Set the mix, then rebalance to keep it.
You picked the stock and skipped the mix. Three funds, a percentage by age, the count over thirty years, and the rebalance that keeps it - that is the control.