The largest over-the-month decrease in spending in a year, reported Friday by the Commerce Department, came after consumer spending shot up by 1 percent in July and then another 1.1 percent in August. Consumers spent more lavishly earlier as they began to see the cash from President Bush's third round of tax cuts.
Economists had said in advance of Friday's report that the brisk pace of spending — which helped spur a 7.2 percent annual rate of growth in the third quarter — just couldn't be sustained. They had predicted that shoppers would rein in their finances in September, and they did just that.
Analysts had forecast a 0.1 percent decrease in spending. The 0.3 percent decline was the largest since a 0.4 percent drop in September 2002.
Americans' incomes, meanwhile, rose by 0.3 percent in September for the third month in a row. That was slightly better than the 0.2 percent increase economists were calling for. Income growth is the fuel for future spending.
The spending and income figures are not adjusted for price changes.
Consumers, whose spending accounts for two-thirds of all economic activity in the United States, have been buying at a sufficient pace to keep the economic recovery from the 2001 recession moving forward.
Despite the slowdown in September, consumers helped propel economic growth as a whole in the third quarter to its strongest pace since 1984.
The economy in the July-to-September quarter grew at a red-hot 7.2 percent annual rate as consumers spent lavishly and businesses boosted investment.
Super-low short-term interest rates, the tax cuts and a refinancing wave helped to support spending and give the economy an energizing jolt in the summer.
The missing piece, however, for a sustained rebound is steady improvement in the nation's battered labor market, which has seen millions of job evaporate over the last three years, economists say. The risk: a prolonged sluggishness, or worse, a deterioration on the jobs front could crimp consumer spending, something that would slow the rebound.
Although economists are optimistic the job situation will get better, it is something that they are keeping a close eye on.
As the stimulus provided by the tax cuts fades, the economy is expected to slow but still grow at a solid rate of perhaps 4 percent in the final quarter of this year, economists say.
In September, consumer spending on "durable" goods — big-ticket items, such as cars and appliances, expected to last at least three years, was cut by 5.1 percent, reversing part of August's 3.8 percent gain.
But for "nondurables" such as food and clothes, consumers boosted spending by 0.3 percent in September, after a 1.4 percent increase the previous month. Consumer spending on services, meanwhile, rose 0.4 percent in September, up from a 0.3 percent gain in August.