ETF tax can depend on residence, account wrapper, fund type, distribution policy and how long the position was held. The exchange or trading currency rarely answers the tax question.
Define the taxable event
A sale, distribution, deemed gain or fund-level event may be treated differently. Some systems tax realised gains; others use annual or notional methods.
Calculate the gain correctly
Use the locally accepted cost basis, include allowable transaction costs and preserve records across broker transfers.
Check the wrapper and fund
Pension or special investment accounts may defer or reduce tax. Accumulating and distributing share classes can have different cash flow without necessarily eliminating tax.
Plan before selling
Confirm residence, loss-offset rules, allowances and reporting deadlines for the current year.