AFAIK there are non-trivial tax liabilities and reporting requirements in the US for non US persons investing in the US. Just to be on the safe side, I wouldn't

AFAIK there are non-trivial tax liabilities and reporting requirements in the US for non US persons investing in the US. Just to be on the safe side, I wouldn't directly invest in another country without consulting a tax professional first. If you want to invest in a US index, you can probably find a ETF traded in your country of residence that tracks a US index. It'd cost a bit more than Vanguard's, but would cost you much less in hassle, effort, and regulatory requirements (which would be handled by whoever manages the fund). You should ask your broker or bank about that before rushing to try and buy Vanguard's ETF directly from the US.