Plans aimed at preventing companies that run children's homes in England from making excessive profits will be set out by the government on Monday.
It says it will bring forward new measures that will require large providers to disclose their finances. If they do not limit their profits voluntarily, they will face a legal limit on how much they can make.
The government also intends to strengthen the powers regulator Ofsted has to investigate and fine "exploitative" children's home providers that prey on a stretched care system.
Education Secretary Bridget Phillipson said "thousands of children have been failed" within the care system.