Her fortune was reported at $40 million in 2013 and $50 million in 2014Clarkson and her husband, Bill, retain a 60% stake in the Lorna Jane brand, after private equity firm CHAMP Ventures purchased a 40% stake in 2010.
In 2016, the overall value of the business was estimated at $500 million, with an annual revenue for 2014 estimated at $200 million.Clarkson won numerous RAQ Fashion Design Awards, and the Outstanding Retailer of the Year award at the BRW and AMP Capital Shopping Centres Australian Retailer of the Year Awards 2011.
In 2013, she was inducted into the HerBusiness Businesswomen's Hall of Fame.She has published six books on health and wellbeing: Move, Nourish, Believe: The Fit Woman's Secret Revealed (2011), MORE of the Fit Woman's Secrets (2013), NOURISH - The Fit Woman's Cookbook (2014), INSPIRED (2015), Love You (2017), and Eat Good Food (2018).
After establishing the Lorna Jane business, Clarkson studied fashion at TAFE college and was awarded a Diploma of Fashion.
She later said that, in hindsight, earning this qualification was unnecessary because of the practical experience she had already gained.