Budget Deficit Projected to Hit $3 Trillion as Pandemic Spending Buoys Economy

WASHINGTON — The U.S. economy is rebounding from the pandemic downturn faster than expected and is on track to regain all the jobs lost during the coronavirus by the middle of next year, partly as a result of enormous amounts of federal spending that will push the budget deficit to $3 trillion for the 2021 fiscal year, the Congressional Budget Office said on Thursday.

New forecasts that incorporate the $1.9 trillion stimulus package that President Biden signed into law in March give little credence to warnings by Republican lawmakers and some economists that runaway inflation from all that spending could cripple the economy. Instead, the budget office predicted that a recent spike in prices for cars, airline tickets and other products would be temporary and begin to recede this year.

Administration officials downplayed the deficit projections and focused instead on the predictions for economic growth, saying the strong numbers validate Mr. Biden’s push to douse the economy in stimulus and reinforce their view that inflation poses little threat to the recovery.

The budget office, which is nonpartisan, predicted the economy would grow 6.7 percent for the year, after adjusting for inflation. That would be the fastest annual growth in the United States since 1984. It is significantly faster than the budget office and the Biden administration had each projected this year.

The unemployment rate is also estimated to fall below 4 percent next year and remain historically low for years to come, signaling a significant acceleration in job gains from what the office predicted in February. The C.B.O. said then that unemployment would not fall below 4 percent until 2026.

Budget office officials said the uptick in growth and employment forecasts stemmed in large part from aggressive government stimulus. But the economy is also benefiting from consumers, who are rapidly spending savings they built up during the pandemic. Households were buttressed by multiple rounds of stimulus, including direct checks, passed under President Donald J. Trump, and by a faster-than-anticipated return to normalcy in the economy as vaccinations have spread.

Mr. Biden’s aides claimed credit for many of those developments. They said the president’s push to accelerate vaccine production and distribution had fueled the reopening of the economy. David Kamin, a deputy director of the White House National Economic Council, said in an interview that Mr. Biden’s stimulus package, the American Rescue Plan, was intended to drive a more rapid return to low unemployment, and that the budget office’s projections were evidence it was succeeding.

“This report really goes to the very theory of the case as to why we pursued a rescue plan,” he said.

Administration officials also heralded updated projections from the International Monetary Fund, released Thursday afternoon, which predicted the U.S. economy would grow 7 percent in 2021 after adjusting for inflation. In April, the I.M.F. forecast 4.6 percent growth for the year in the United States.