An estimated 40,000 households could be hit by the new £500 a week benefits cap which will be rolled out by the Government today.
Households could lose up to £90 a week under the new proposals which is expected to save £275 million a year from the welfare bill.
National implementation will begin in July, with the policy fully in force by the end of September.
Work and Pensions Secretary Iain Duncan Smith said:
The Benefit Cap sets a clear limit for how much support the welfare state will provide - the average wage for working households.
But it's also a strong incentive for people to move into work and even before the cap comes in we are seeing thousands of people seeking help and moving off benefits.