Quick Answer
Singapore has no income tax treaty with the US, so US-domiciled ETFs lose 30% of US dividends. Ireland-domiciled UCITS funds usually lose 15%. On S$100,000 at a 1.5% dividend yield and 6% growth over 20 years, the Ireland-domiciled option could keep about S$13,423 more, even with a slightly higher fee.
The Useful Number: S$100,000 at a 1.5% dividend yield and 6% growth for 20 years: the Ireland-domiciled option could keep about S$13,423 more, even with a slightly higher expense ratio.
Why Does Where A Fund Is Set Up Matter?
When a US company pays a dividend to a foreign investor, the US takes tax first. The default rate is 30%. A tax treaty can lower it, but Singapore has no income tax treaty with the US. So if you hold a US-listed, US-domiciled ETF, 30% of its US dividends go to US tax before you see them.
An Ireland-domiciled UCITS fund that holds the same US shares can usually claim the US–Ireland treaty rate of 15% on the dividends it receives. That is still a loss, but half as big. The fund then reinvests or pays out what is left.
What Does The Gap Look Like Over 20 Years?
These numbers are made up and describe no real fund. Invest S$100,000 for 20 years, with a 1.5% dividend yield, 6% yearly price growth and dividends reinvested.
- Option A, US-domiciled, 0.03% fee: S$388,264
- US dividend tax over 20 years (A): S$18,484
- Option B, Ireland-domiciled, 0.07% fee: S$401,687
- US dividend tax over 20 years (B): S$9,428
- Difference: S$13,423 in favour of B
In year one the tax gap is only S$225 (S$100,000 × 1.5% × 15 points). It grows because the extra dividends stay invested and compound. Raise option B’s fee to 0.6% and option A comes out ahead by about S$27,105: fees matter as much as tax.
- Invested Today: S$100,000
- Option A: US, 0.03% Fee: S$388,264
- Option B: Ireland, 0.07% Fee: S$401,687
- Difference In Favour Of B: S$13,423
Data as of . Source: IRS — NRA Withholding.
What Does The Comparison Leave Out?
The tool assumes the fund holds only US shares, keeps a steady yield and growth, and loses nothing else. Real funds differ in bid-ask spreads, tracking difference, fund size, trading currency and how your broker handles them. Whether a fund can claim the 15% rate depends on the fund itself, so read its documents.
Ireland-domiciled funds are also not US-situs assets for US estate tax, which US-domiciled ETFs are. See the US estate tax guide.
How Do You Use This Number?
Enter the real expense ratios and dividend yields from each fund’s factsheet, then test a lower growth rate. Compare all-in costs with the investment fees guide and check your broker’s charges with the trade cost calculator. This guide names no fund and recommends none.
Quick Check
Three statements from this guide. Tap True or False to check what you have read. Nothing is saved.
Card 1 Of 3
A Singapore investor in a US-domiciled ETF usually loses 30% of its US dividends to US tax.
Why? Card 1 Of 3
An Ireland-domiciled UCITS fund holding the same US shares can usually claim 15% under the US–Ireland treaty.
Card 2 Of 3
The Ireland-domiciled option always ends with more money.
Why? Card 2 Of 3
In the main example, option B keeps about S$13,423 more over 20 years.
Card 3 Of 3
Every Ireland-domiciled fund is sure to get the 15% treaty rate.
Why? Card 3 Of 3
Read the fund’s documents, and compare spreads, tracking difference and fund size as well.
Your Score
Try It With Your Numbers
Open the calculator with this guide’s example filled in. Then change the numbers to match your situation.
Open ETF Dividend Withholding Tax Calculator →Frequently Asked Questions
Why Do US-Domiciled ETFs Lose 30% Of Dividends?
The US takes 30% of US dividends paid to foreign investors unless a tax treaty lowers it.
Singapore has no income tax treaty with the US, so Singapore investors in US-domiciled ETFs lose the full 30%.
Why Do Ireland-Domiciled Funds Lose Only 15%?
The US–Ireland tax treaty sets 15% on portfolio dividends.
An Ireland-domiciled fund that holds US shares can usually claim it on the dividends it receives, though this depends on the fund.
Can A Higher Expense Ratio Cancel Out The Tax Saving?
Yes.
In the example, raising the Ireland-domiciled fund’s fee to 0.6% makes the US-domiciled option come out ahead by about S$27,105. Compare each fund’s all-in costs, not just the tax.
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Sources & Assumptions
- IRS — NRA Withholding ↗
- IRS — United States Income Tax Treaties A To Z ↗
- IRS — US–Ireland Income Tax Treaty ↗
- MoneySense — Investment Risk ↗
Sources checked 4 October 2026. These are examples only. Check the stated assumptions and limits before you use a result.
General information and estimates, not advice. Rates from IRS sources checked 12 October 2026. Assumes a fund of US shares only, steady returns and reinvested dividends; ignores currency moves, spreads and other taxes.