The average UK household has £9 per week less spending power in January 2012 than they did 12 months previously, according to the latest Asda Income Tracker.
On average, households had £147 a week of discretionary income in January, 5.5 per cent lower than in 2011.
Although disposable income continues to decrease, the figures show that the rate of decline is slowing down. January's data represents the lowest annual decline since June 2011.
The Asda president and CEO, Andy Clarke, said:
It's encouraging to see the cost of basics improving, easing the pressure on family spending power and freeing up cash to spend elsewhere.
Families are making smart choices, doing more with less and staying optimistic about maintaining their quality of life.
Asda has now launched an online budget planning tool aimed at helping families to maximise their spending power. The Asda Budget Planner allows users to "understand what's coming in, going out and how much is left over each week".