Sinha faces six charges of maid abuse, including having hit the woman's head with a showerhead until it broke, pulling her hair, banging her head against the wall, beating her with a clothes hanger and slapping.
The maid had worked for Sinha for six months. She was abused at Sinha's home between May and August 2012.
Sinha is out on a SGD 15,000 (USD 11,980) bail and her passport has been impounded.
If convicted of voluntarily causing hurt, Sinha could be jailed for up to three years and/or fine up to SGD 7,500. She also faces a maximum penalty of 10-1/2 years in jail and a fine for using a heated substance.
Sinha's lawyer, Diana Ngiam, on Thursday asked for the case to be adjourned for a criminal case discovery conference.
A pre-trial conference is scheduled for June 9.