An all-rounder, she played as a right-handed batsman and a right-arm medium pace bowler.

[1] Kaushalya made her debut against India during the 2005 Women's Cricket World Cup, scoring seven runs.

[3] She batted well for Sri Lanka during the 2006 Women's Asia Cup, finishing top of the batting averages for her country, scoring 106 runs at 35.33, including her career high score of 57.

[5] In February 2016, she along with Ama Kanchana recorded the highest 8th wicket partnership in WT20I history (39).

[6][7] In October 2018, she was named in Sri Lanka's squad for the 2018 ICC Women's World Twenty20 tournament in the West Indies.