When adjusted for inflation, spending nudged up 0.1 percent last month after rising 0.2 percent. The sixth straight month of gains in the so-called real consumer spending came as a key inflation gauge fell in April by the most since July last year, pushed down by declining gasoline prices.
That modest rise suggested that consumer spending would slow in the second quarter after accelerating at a 3.4 percent annual pace in the first three months of the year.
"Consumer spending is on a very modest track because income is not growing very much. Wage gain is very low even though job growth has picked up," said Kevin Logan, chief U.S. economist at HSBC Securities in New York.
The economy has been hit by higher taxes and deep government spending cuts as the government tries to slash its budget deficit.
It grew at a 2.4 percent pace in the January-March period, but is expected to slow to a rate of between 1.5 percent and 2.2 percent this quarter because of the government budget cuts, which are already putting a strain on manufacturing.
A price index for consumer spending fell 0.3 percent last month after dipping 0.1 percent in March. A core reading that strips out food and energy costs was flat after rising 0.1 percent the prior month.
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Over the past 12 months, inflation has risen just 0.7 percent, the smallest gain since October 2009 and pushing further below the Federal Reserve's 2 percent target. The index had increased 1.0 percent in the period through March.
Core prices are up 1.1 percent, the smallest rise since March 2011 and slowing from 1.2 percent in March.
The weak spending and the lack of inflation pressures could dampen market speculation the U.S. central bank might start scaling back monetary easing later this year.
Fed Chairman Ben Bernanke said last week a decision to start tapering the $85 billion in bonds the Fed is buying each month could come at one of its "next few meetings" if the economy appeared set to maintain momentum.
"Certainly, the inflation data suggest the Fed at the moment should not be overly concerned about inflation. That gives them plenty of scope to continue QE," said Logan.