Total drag is the combined leakage from recurring costs — TER, tracking difference, and dividend withholding — plus the execution friction you pay each time you buy: FX conversion, bid-ask spread, and commission. It is the sum of everything that reduces your compounding base, year after year.

Because it is a permanent annual leak, not a one-time fee. If a fund yields 1.8% and 15% is withheld at source, you lose roughly 0.27% per year from the compounding base (1.8% × 15%). Multiply this over 10–30 years and it compounds against you, whether or not the market goes up.

No. Local capital gains tax, dividend income tax, and annual wealth taxes (like Netherlands Box 3) are not modeled. These vary enormously by country and can change the conclusion entirely. This tool focuses purely on the wrapper and execution layer — the costs that apply before your local tax authority gets involved.

Not automatically. If you convert currency on every purchase and pay 0.20–0.30% in FX costs, a 0.05% TER advantage on the US ETF is irrelevant — it is swamped in the first year. Optimise your execution workflow first (broker choice, funding currency, buy frequency), then compare TERs within the shortlist you can actually access.

For most EU investors: (1) FX cost per buy — this is often the single biggest variable, (2) spread and liquidity of the specific ETF and exchange you use, (3) investing cadence — how fixed commissions drive you to batch, creating cash drag, and (4) dividend yield times withholding rate. TER is usually the last thing to optimize.

Most EU retail investors cannot buy US ETFs directly because US-domiciled funds do not provide the KID required under PRIIPs regulations. UCITS equivalents are the practical default. A small number of routes exist: elective professional client status at brokers like IBKR (requiring a portfolio above approximately €500,000 or a demonstrated high trade frequency), or using non-EU brokers that still accept EU residents. Check the rules for your country and broker before assuming access.

No. A EUR-listed S&P 500 UCITS ETF still holds USD-denominated US equities underneath. Buying it in EUR does not hedge your exposure to USD movements — you are fully exposed to EUR/USD through the underlying assets, regardless of which currency you used to purchase. Trading currency only determines whether your broker charges you for an FX conversion. If you actually want to reduce currency risk, you need a currency-hedged share class, which carries its own annual hedging cost.

Non-US investors holding US-domiciled securities (such as VOO or VTI) above $60,000 at the time of death are potentially subject to US federal estate tax — at rates up to 40% on the value above the threshold. Irish UCITS ETFs are not US-situs assets and are therefore completely outside this exposure. Some bilateral tax treaties (including the US-UK and US-Germany treaties) raise the effective exemption threshold substantially, but treaty terms vary by country. If you reside in a country without a US estate tax treaty, the case for Irish UCITS over US ETFs on this point alone is compelling for any serious long-term investor.

For many EU investors, yes — on multiple dimensions. Accumulating UCITS ETFs reinvest dividends automatically inside the fund with no cash landing in your account. In many EU tax systems, this defers any dividend tax event until you sell, enabling long-run compounding on the full pre-tax amount. US ETFs are legally required to distribute dividends, meaning you receive cash, potentially owe tax on it, and must manually reinvest — every distribution cycle. That execution friction and potential tax drag compounds quietly over decades in ways that a TER comparison never shows.

Yes, significantly. Irish-domiciled UCITS ETFs benefit from the Ireland-US tax treaty, which reduces fund-level US dividend withholding to 15%. For investors in non-treaty countries — where the default rate is 30% — an Irish UCITS accessing US dividends at 15% provides a material and permanent advantage over holding US-domiciled ETFs directly. For investors in treaty countries that also reduce withholding to 15%, the domicile difference at the withholding level is smaller, and other factors (TER, FX, estate tax) become more decisive.