The bedroom tax has been "mismanaged from the start" and has failed to free up larger properties, according to Labour.
Shadow welfare minister Chris Bryant said:
This ill-conceived policy has been mismanaged from the start.
It's failed to free up larger properties because there simply aren't smaller properties to move to.
It's hitting the most vulnerable hardest, and failing to save the money that David Cameron had predicted.
The Government has no reason to keep it - if they won't repeal it, a Labour government will.
More top news
Wednesday will be a cloudy but mild day across southern England and Wales with outbreaks of rain
A diplomat from the North Korean embassy in Kuala Lumpur is being sought over the death of Kim Jong-nam.
The former leader of Hong Kong Donald Tsang has been jailed for 20 months after being convicted of corruption over a luxury apartment.