The former Maris Stella High School principal has been charged with 20 counts of misappropriating funds totaling S$148,540 between May 2004 and September 2009.
Anthony Tan Kim Hock, 64, retired in 2009 and had repeatedly misappropriated S$44,861 from the school's account for his own use. Some of the charges involve payments for a man known as Peter Lim, who is believed to be a relative and is said to be in his 30s.
Tan is alleged to have used the money to pay for Lim's overseas school trips and other supplementary lessons paid from the school's management committee account and the Director-General of education school fund account.
Tan also kept donations and funds of about $67,679 from the school chapel building fund and pocketed another S$34,000 and S$2,000 that was donated to the school and three retired Marist brothers respectively.
The ex-principal is out on a S$40,000 bail. The next court hearing will be on 16 June.