With the government running a hefty $113 billion surplus in the tax payment month of April, according to the Treasury, analysts now do not expect the country to run out of room under its debt ceiling — a statutory borrowing limit Congress needs to raise to avoid default — until sometime in the fall. That has left both Democrats and Republicans hesitant to enter another round of negotiations over painful cuts to entitlement programs like Social Security and Medicare, and tax increases on a broader swath of Americans, despite the still-heated rhetoric on both sides.

For the moment, the deficit is largely repairing itself. Just three months ago, the Congressional Budget Office projected that the current-year deficit would be $845 billion, or about 5.3 percent of economic output.

The $200 billion reduction to the estimated deficit comes not from the $85 billion in mandatory cuts known as sequestration, nor from the package of tax increases that Congress passed this winter to avoid the so-called fiscal cliff. The office had already incorporated those policy changes into its February forecasts.

Rather, it comes from higher-than-expected tax payments from businesses and individuals, as well as an increase in payments from Fannie Mae and Freddie Mac, the mortgage finance companies the government took over as part of the wave of bailouts thrust upon Washington in the darkest days of the financial crisis.

The C.B.O. said it had bumped up its estimates of current-year tax receipts from individuals by about $69 billion and from corporations by about $40 billion. The office said the factors lifting tax payments seemed to be “largely temporary,” due in part, probably, to higher-income households realizing gains from investments before tax rates went up in the 2013 calendar year.

It also reduced its estimated outlays on Fannie and Freddie by about $95 billion. The mortgage giants, which have required more than $180 billion in taxpayer financing since the government rescued them in 2008, have returned to profitability in recent quarters on the back of a stronger housing market and have begun to repay the Treasury for the loans.

But there is a darker side to the brighter outlook for the deficit. The immediate spending cuts and tax increases Congress agreed to for this year are serving as a partial brake on the recovery, cutting government jobs and preventing growth from accelerating to a more robust pace, many economists have warned. The International Monetary Fund has called the country’s pace of deficit reduction “overly strong,” arguing that Washington should delay some of its budget cuts while adopting a longer-term strategy to hold down future deficits.