Prepared by A-J | Author brand: 盡職生活｜阿J的普通人理財筆記
About the author/site · Vocus @WUCJ ↗ · Editorial policy
Page version: 2026-08-16 | Official or primary sources are preferred for material rules and figures. AI may assist structure, translation, and code, but is not used as the sole factual source.
About the author/site · Vocus @WUCJ ↗ · Editorial policy
Page version: 2026-08-16 | Official or primary sources are preferred for material rules and figures. AI may assist structure, translation, and code, but is not used as the sole factual source.
Key distinction: Market FX, a bank's posted rate, and your executable transaction rate can differ.
For banknotes or account currency, start with a retail bank board
Bank of Taiwan lists cash and spot buy/sell rates as a useful retail reference.
For past dates, use historical FX lookup
Bank of Taiwan provides historical cash and spot rate searches.
For the interbank USD/TWD market, use central bank closing rates
The Central Bank of Taiwan publishes an interbank USD/TWD closing-rate series, which differs from retail customer exchange rates.
Actual transaction prices come from the execution channel
Bank of Taiwan notes that online, cash-order, and counter transactions use the rate shown at the time of transaction.
Primary / official sources
Posted rates change continuously. Actual transactions use the rate and fees shown by the executing bank, broker, or payment provider.