Last verified April 2026
International Index Funds vs ETFs: VXUS, VTIAX, and the Foreign Tax Credit (2026)
International index funds and ETFs have wider expense ratio gaps than US equivalents, and they introduce one unique complication: the foreign tax credit. Holding international funds in a taxable account allows you to claim foreign taxes paid as a US tax credit - but this benefit is lost inside an IRA or 401(k). Here's how to navigate it.
VXUS vs VTIAX: The Core Vanguard International Pair
VXUS (ETF)
Vanguard Total International Stock ETF
- Expense ratio: 0.08%
- Covers developed + emerging markets (ex-US)
- Minimum: 1 share or fractional (~$60/share)
- Bid-ask spread: ~2-3 bps (typical session)
VTIAX (Admiral MF)
Vanguard Total International Index Admiral
- Expense ratio: 0.12%
- Same underlying portfolio as VXUS (patent-enabled)
- Minimum: $3,000 at Vanguard
- Bid-ask spread: None (MF)
The 4 basis point ER gap between VXUS (0.08%) and VTIAX (0.12%) is larger than the typical 1 bp US equity gap. On $100,000 invested, that's $40/year in favour of VXUS. Over 30 years at 7% returns, that $40/year compounds to roughly $4,000 in additional terminal wealth - meaningful but not dramatic. Both share the same underlying portfolio via the patent-era structure, giving identical tax outcomes in taxable accounts.
At non-Vanguard brokers (Fidelity, Schwab), VXUS is available at zero commission; VTIAX may carry a transaction fee. Fidelity's FTIHX (0.06% ER) tracks a similar international index and is cheaper than VXUS at Fidelity if you're not planning to move brokers.
The Foreign Tax Credit: Why International Belongs in Taxable
When a fund holds foreign stocks, foreign governments withhold dividend tax at the source - typically 5-30% depending on the country and applicable tax treaty. If a fund holds more than 50% of its assets in foreign securities (VXUS, VTIAX, FTIHX, VEA all qualify), it can elect to pass through the foreign taxes paid to shareholders on your 1099-DIV (Box 7).
You can then claim the foreign tax credit on your US tax return - either simplified (up to $300 single/$600 MFJ without Form 1116) or via the full Form 1116 calculation. This typically recovers 5-15 basis points per year in tax drag - essentially reducing the effective cost of international funds.
The IRA Trap
If you hold international funds inside an IRA or 401(k), the foreign tax credit is permanently lost. You still pay the foreign withholding tax at the fund level, but you cannot claim the credit against your taxes (because you owe no taxes on IRA distributions until withdrawal, and the credit doesn't carry over). This means holding international funds in a taxable account is more tax-efficient than holding them in an IRA, all else equal.
Asset location recommendation: if you have both taxable and tax-advantaged space, put international equity (VXUS, VEA, VWO) in your taxable account to preserve the foreign tax credit. Put US equity and bonds in your IRA/401(k) where the FTC doesn't matter anyway.
Expense Ratios: International ETFs and Funds
| Fund | Ticker | ER | Wrapper | Coverage | Notes |
|---|---|---|---|---|---|
| SPDR Portfolio Developed World ex-US | SPDW | 0.03% | ETF | Developed ex-US | Cheapest developed-markets ETF |
| Vanguard FTSE Developed Markets ETF | VEA | 0.05% | ETF | Developed ex-US | |
| Fidelity Total International Index | FTIHX | 0.06% | MF | Total international | Fidelity-only |
| Schwab International Index ETF | SCHF | 0.06% | ETF | Developed ex-US | |
| iShares Core MSCI EAFE | IEFA | 0.07% | ETF | Developed ex-US | |
| Vanguard Total International Stock ETF | VXUS | 0.08% | ETF | Total international | |
| iShares Core MSCI Total International | IXUS | 0.07% | ETF | Total international | |
| Vanguard Total World Stock ETF | VT | 0.07% | ETF | Global (US + Intl) | One-ticket global exposure |
| Vanguard Total International Admiral | VTIAX | 0.12% | MF | Total international | $3,000 min at Vanguard |