New social housing tenants could be kicked out of their homes after as little as two years under Government plans.
In a move that will anger some Liberal Democrat MPs, coalition moves to put an end to lifetime tenancies will go even further than previously indicated.
Prime Minister David Cameron has already said he wants an end to council tenancies for life and the introduction of fixed-term contracts of "five or 10 years".
But, under reforms to be announced on Monday, councils and housing associations will be able to offer contracts of just two years. Tenants whose financial circumstances have improved could then be evicted, although they would be entitled to at least six months' notice.
Councils and housing associations will also be able to charge rent of up to 80% of the market rate so that they can raise money to buy new properties. The changes will only apply to new tenants - those already on lifetime tenancies and social rents will keep their current contracts.
Ministers will insist the moves will make the system fairer, by giving social housing landlords more flexibility in trying to accommodate people with the greatest need. There are five million people on waiting lists for social housing.
But the plans are likely to inflame coalition tensions. Lib Dem deputy leader Simon Hughes insisted the move to introduce fixed term tenancies was the policy of neither the coalition nor his party when it was raised by Mr Cameron in August.
It is thought that the Government wants to implement the changes - which apply to England only - as early as next year.
A Department for Communities and Local Government spokesman said: "Social housing is all about ensuring that people have a decent roof over their head, but during Labour's 13 years we saw the waiting lists double.
"So this coalition Government is going to take real action to ensure that affordable housing is targeted directly for those in most need and that's why a radical shake-up is required now. We will build more affordable homes, bring common sense to the rules and work to bring down those record high waiting lists."