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Buy US ETF as foreigner — a bad idea?
Here're some findings upon researches: Two main things to watch out for: Estate tax and the 30% tax withholding. These 2 could be get around by investing in Luxembourg or Ireland  domiciled ETF. For instance there's no tax withholding on Ireland domiciled ETF dividend, and the estate tax is not as high. (source: BogleHead forums)  Some Vanguard ETF offered in UK stock market: https://www.vanguard.co.uk/uk/mvc/investments/etf#docstab. Do note that the returns of S&P 500 ETF (VUSA) are adjusted after the 30% tax withholding! Due to VUSA's higher TER (0.09%), VOO should remain a superior choice. The FTSE Emerging Markets and All-World ETFs though, are better than their US-counterparts, for non-US residents. Non-US residents are able to claim back partials of the withhold tax, by filing the US tax form 1040NR. In 2013, non-US resident can claim back at least $3,900. Kindly correct me if anything is inaccurate.