MBC's 'Section TV' covered her income on the December 11 episode. She has filmed an incredible amount of CFs after the success of her 2014 hit 'You Who Came From the Stars'. This year, she filmed 14 different CFs and made 14 billion KRW (approximately 12 million USD) in endorsements alone. This means she basically makes 1 billion KRW (approximately 850,000 USD) per CF.
Not only so, but she makes 100 million KRW (approximately 85,000 USD) per episode of a drama that she appears in, showing just how much in demand she's in.