DESK / BOGLEHEAD 3-FUND
2026 edition
PORTFOLIO ARCHETYPE
The Boglehead three-fund portfolio in two wrapper versions
John Bogle's signature portfolio is total US market + total international + total bond, in market-cap-weighted ratios. The wrapper choice (ETF or mutual fund) does not change the underlying holdings or expected returns. It changes the contribution mechanics and the tax efficiency in a taxable account.
QUICK VERDICT
read this if nothing elsePick the ETF if
VTI + VXUS + BND if you want maximum portability across brokerages, you are tax-loss harvesting in a taxable account, or your brokerage is not Vanguard.
Pick the index fund if
VTSAX + VTIAX + VBTLX if you are at Vanguard with at least $3,000 to start in each, want native dollar-amount auto-invest, and want the dual-share-class tax efficiency in your taxable account.
The Boglehead three-fund portfolio originates with the Bogleheads three-fund wiki and traces back to John Bogle's writings. The three asset classes are US total market, total international ex-US, and US total bond. Asset-allocation weights vary with the investor's age and risk tolerance, typically ranging from 90/10 stocks/bonds for younger investors to 50/50 or 40/60 stocks/bonds for retirees. The international share of equity typically runs 20 to 40 percent.
Three-fund Bogleheads explicitly do not tilt to small caps, value, REITs, emerging-markets-only, or sectors. The argument is that the additional diversification benefit of the tilts is small and the implementation cost (rebalancing burden, behavioural temptation to abandon the tilt at a bad time) is real. The three-fund portfolio is the discipline-first version.
SECTION 02 / THE STANDARD ALLOCATIONS
Age-based and risk-based standard splits
By age (the "120 minus age" heuristic, equity weight): Age 25 gives 95 percent equity / 5 percent bond. Age 35 gives 85 percent equity. Age 45 gives 75 percent equity. Age 55 gives 65 percent equity. Age 65 gives 55 percent equity. The Bogleheads wiki notes that Bogle himself preferred bond weight equal to age, so the heuristic is a starting point not a rule.
International share within equity: Bogle was famously sceptical of international equity exposure (his "you can buy the world's economy with the S&P 500" argument). Modern Bogleheads typically hold 20 to 40 percent of equity in international, with 30 percent being the most common starting point. Some hold zero international (the Bogle-purist position). Some hold market-cap-weighted international (currently ~37 percent of global equity).
Working three-fund template (age 35, moderate risk): 60 percent US total market + 25 percent international total market + 15 percent total bond. Adjust the equity share for risk tolerance, the international share for global-versus-US preference, and the bond share for age and time horizon. Rebalance annually or when allocations drift more than 5 percentage points.
SECTION 03 / TWO WRAPPER VERSIONS, FOUR ISSUER FAMILIES
Implementation across the major fund families
Vanguard ETF version
- VTI - US total market, ~0.03%
- VXUS - international total ex-US, ~0.07%
- BND - US total bond, ~0.03%
The most common Boglehead implementation. Portable across all brokerages. Best for taxable accounts because of the in-kind ETF tax efficiency.
Vanguard Admiral mutual fund version
- VTSAX - US total market, ~0.04%
- VTIAX - international total ex-US, ~0.11%
- VBTLX - US total bond, ~0.05%
Native auto-invest with exact-dollar contributions. $3,000 minimum per fund. Inherits ETF tax efficiency in taxable via Vanguard's dual share-class structure.
Fidelity index mutual fund version
- FSKAX - US total market, ~0.015%
- FTIHX - international total ex-US, ~0.06%
- FXNAX - US total bond, ~0.025%
Cheapest mutual fund option. $0 minimum. Fidelity-only at transaction-fee-free pricing. Best inside a Fidelity IRA, less ideal in a Fidelity taxable account.
Schwab proprietary mutual fund version
- SWTSX - US total market, ~0.03%
- SWISX - international ex-US, ~0.06%
- SWAGX - US total bond, ~0.04%
Schwab-native lineup. $0 minimum. Schwab-only at transaction-fee-free pricing. Best inside a Schwab IRA. SWISX excludes emerging markets, so add SCHE for full ex-US coverage.
SECTION 04 / WHY THE THREE-FUND PORTFOLIO WORKS
Diversification, low cost, and behavioural simplicity
Diversification. Three funds give you exposure to roughly 10,000+ stocks across all industry sectors and 40+ developed and emerging-market countries, plus the entire US investment-grade bond market. The remaining undiversifiable risk is broad market risk (the stock market goes down) and rate risk (interest rates go up). No portfolio of liquid public-market index funds can eliminate either.
Low cost. The Vanguard ETF version (VTI + VXUS + BND) carries a blended expense ratio of approximately 0.04 percent on a 60/25/15 allocation. On a $500,000 balance that is $200 per year in fund-level expense. The Fidelity mutual fund version is even cheaper. At this cost level, expense ratio is no longer the marginal decision. Asset allocation, contribution rate, and behavioural discipline matter orders of magnitude more.
Behavioural simplicity. Three funds, two-or-three rebalancing decisions per year, no temptation to chase sector winners, no temptation to time the market. The smaller the decision surface, the lower the risk of making a costly behavioural mistake. The empirical evidence consistently shows that retail investor return shortfall versus benchmark indexes is dominated by behavioural errors (selling during drawdowns, chasing performance, market-timing) rather than by fund selection.
SECTION 05 / WHEN TO ADD A TILT
Common deviations from the pure three-fund
Some Bogleheads add tilts to the basic three-fund. The usual candidates:
- Small-cap value tilt (VBR or AVUV at 5 to 10 percent of equity). The size and value factors have produced premiums historically; the empirical record on whether they continue is contested.
- REIT tilt (VNQ at 5 to 10 percent of equity). Adds real-asset exposure and yield. See the VNQ vs VGSLX page for the wrapper-side analysis.
- Emerging-markets tilt (VWO or IEMG at 30 to 40 percent of international rather than market-cap weight). Higher expected returns from higher growth rates is the argument. Empirical record mixed.
- TIPS (VTIP or SCHP at 25 to 50 percent of bonds). Adds inflation-protection. More relevant for retirees than for accumulators.
The Boglehead consensus is that tilts can be reasonable in moderation but are not necessary for a successful portfolio. The pure three-fund is the discipline default; tilts are an enhancement that requires more rebalancing burden and more behavioural discipline to maintain through market cycles.
For a similar simplicity-first portfolio with even fewer decisions, see the lazy portfolios page. For the target-date-replacement approach (one fund, full glide path), see the target date replacement page.
DESK Q&A
Frequently asked
Q01Is the three-fund portfolio better than a target-date fund?
Slightly cheaper (target-date funds typically charge 0.10 to 0.15 percent versus 0.04 percent for the three-fund DIY) and gives you direct control over the international and bond allocation weights. The trade-off: you do the rebalancing yourself and you have to update the bond glide path manually as you age. Target-date funds bundle both. For investors who want set-and-forget at minimum cost, target-date is fine; for investors who want lower cost and more control, three-fund.
Q02Can I implement the three-fund using ETFs in a 401(k)?
Usually no. Most 401(k) plans do not offer ETFs. The plan menu is typically limited to a small list of pre-selected institutional mutual funds (Vanguard institutional, Fidelity institutional, BlackRock LifePath, etc.). Use the closest mutual fund equivalents to VTI, VXUS, and BND from your plan menu. See the 401(k) guide for plan-menu-reading.
Q03Should I use the same wrapper across all three funds?
Most investors do, for cleanliness. Mixing within a single account (e.g. VTI ETF + VTIAX mutual fund + BND ETF) works mechanically but adds rebalancing complexity. The case for mixing: if your taxable account is large enough that the dual-class tax efficiency on VTSAX matters, you might prefer Vanguard mutual funds in taxable while running ETFs in your IRA. Most retail investors stay within one wrapper per account type.
Q04What if I am uncomfortable with international equity?
Drop the international slot and run a 60/40 or 80/20 US-equity-and-bond portfolio. Bogle himself was sceptical of international. The empirical record on whether international diversification improves Sharpe ratio is mixed. Some Bogleheads run 100 percent US equity (with VTI) plus bonds, on the argument that the S&P 500 multinationals provide implicit international exposure. Others hold market-cap-weighted international.
Q05Should I rebalance the three-fund every month?
Generally no. Annual or quarterly rebalancing is sufficient and minimises capital-gains realisation in taxable accounts. The most common Boglehead practice is annual rebalancing (often on the investor's birthday or year-end) plus opportunistic rebalancing when an allocation drifts more than 5 percentage points from target.
Q06What expense ratio should the three-fund total cost?
On the Vanguard ETF version with 60/25/15 weights, the blended expense ratio is approximately 0.04 percent. On the Vanguard Admiral mutual fund version, approximately 0.06 percent. On the Fidelity mutual fund version, approximately 0.025 percent (lowest). On the Schwab proprietary version, approximately 0.04 percent. All four are within reasonable margin and the choice between them does not meaningfully affect long-run returns.
DISCLOSURES / READ BEFORE ACTING
What this page is, and is not
Investment disclaimer
This site provides education and reference. It is not investment advice and is not a substitute for advice from a licensed financial advisor. For licensed advice, search NAPFA or XY Planning Network for fee-only fiduciary CFPs near you.
ETFvsIndexFund.com is independent and not affiliated with Vanguard, Fidelity, Schwab, BlackRock, iShares, Invesco, SPDR, the SEC, FINRA, the IRS, the Investment Company Institute, or Morningstar. Expense ratios, fund minimums, and tax-rate figures cited reflect publicly filed prospectuses and IRS publications and may change. Past performance does not predict future returns.