Foster carer Hayley Woods has been looking after children for seven years, in her three bedroom house in Oldham, Lancashire.
She currently has a ten-year-old child in her care, with a spare bedroom ready to take on another.
Under the so called 'bedroom tax' policy, her bedrooms will be deemed empty, even though they may have children in them.
She stands to lose around £80 month, and says many foster carers she knows have said they will stop fostering.
More top news
Team Sky's Chris Froome is set to win the 2016 Tour de France with an overall lead of four minutes 11 seconds after stage 20 to Morzine
The attempted kidnap of an RAF serviceman took place near RAF Marham, in Norfolk, on Wednesday.
Footballer Marc Crosas faces an investigation after pictures emerged of him appearing to have speared an endangered baby shark