Holding VTI and VXUS Cuts Costs 13 bps vs VT

An analysis by Elm Wealth founders Victor Haghani and James White, published May 22, 2026, finds that holding Vanguard Total US Stock Market ETF (VTI) and Vanguard Total International Stock ETF (VXUS) together costs about 0.13% less per year than holding Vanguard Total World Stock ETF (VT). The difference reflects a slightly lower blended expense ratio for the two‑fund mix and a tax advantage available through VXUS.

The authors attribute 0.03% of the gap to a lower combined expense ratio for VTI plus VXUS. They attribute roughly 0.23% to a foreign tax‑credit pass‑through that VXUS can deliver but VT cannot. Under IRS rules, a fund cannot pass through a foreign tax credit if less than 50% of its assets are in foreign stocks at the end of a quarter; VT holds under 40% in foreign equities and therefore fails that test. The foreign tax credit reduces taxable investors’ net tax drag on foreign dividends when realized in a taxable account.

Elm Wealth’s calculation converts the 0.13% annual advantage to about $1,300 per $1 million invested each year. The authors note the foreign tax‑credit benefit applies only to investors who pay U.S. tax on dividends and who can hold VXUS in a taxable account; the credit has no value inside tax‑advantaged retirement accounts.

The two‑ETF approach also differs in index construction and security counts. VTI tracks a CRSP index while VT and VXUS track FTSE indexes; the analysis treats those index differences as neutral but notes the combined VTI and VXUS holdings include about 20% more individual securities than VT. The authors say the pair provides more opportunities for tax‑loss harvesting because U.S. and international markets can move differently over short periods.

The analysis addresses rebalancing, stating that market‑cap weighting drives most drift and that dividends, IPOs and buybacks cause only modest changes. The authors recommend that periodic checks and rebalancing about every two years are sufficient for most investors.

The report lists caveats. The cost advantage depends on holding VXUS in a taxable account and on individual tax situations. Trading costs, bid‑ask spreads and investor preferences for a single‑fund solution can affect net outcomes. The authors also note that VT’s market capitalization is less than 10% of the combined size of VTI and VXUS, consistent with widespread use of the two‑fund split.