According to data from the Ministry of Finance's Statistics Department, the tax revenue statistics for May revealed that due to delays in income tax filings and the impact of reciprocal tariffs, confidence in Taiwan's stock market has been affected, leading to significant decreases in business income tax, individual income tax, and securities transaction tax. The net amount of securities transaction tax collected in May was NT$18.2 billion, a decrease of NT$9.4 billion from last year, representing a 34% year-on-year decline, marking the largest reduction in nearly 28 months.

Although there were positive developments in early May, such as the US and UK reaching a tariff agreement and investment in AI by cloud service providers, the market sentiment worsened later in the month as President Trump reignited tariff disputes, leading to heightened caution among investors. Cumulatively, from January to May, the net amount of securities transaction tax collected was NT$93 billion, which is the third highest for the same period historically, but this represents a reduction of NT$22.6 billion compared to last year, a decrease of 19.5%.

As for June, the average daily trading value of Taiwan’s stocks was NT$424.8 billion, which is higher than May's NT$390.7 billion but lower than June of last year’s NT$561.5 billion, implying significant challenges for a positive reversal in securities transaction tax this June.

The annual decreases in securities transaction tax from February to May were 24.6%, 31%, and 34% respectively, marking three consecutive months of double-digit negative growth. The real estate-related tax revenues are also not optimistic, with May's land increment tax at NT$5.4 billion, down 35.1% year-on-year; contract tax at NT$1.3 billion, down 29.1%; and individual house tax at NT$5 billion, down 20.1%. The accumulated land increment tax, contract tax, and individual house tax from January to May all show annual decreases ranging from 14% to 20%.