An official works at the dealing room of Hana Bank in central Seoul, Thursday. Yonhap

Korea's tax revenue increased nearly 13 percent in April from a year earlier on the back of the recent bullish run in the stock market, data showed Friday.

The government collected 55.2 trillion won ($36.8 billion) in taxes last month, compared with 48.9 trillion won posted a year earlier, according to the Ministry of Finance and Economy.

The finance ministry attributed the sharp increase to securities transaction levies, which came to 1.3 trillion won in April, soaring from just 200 billion won posted a year earlier.

The increase followed a bullish market fueled by the artificial intelligence (AI) boom, with the transaction value of listed stocks reaching 1,449.4 trillion won in March, more than quadrupling from a year earlier.