The State Senate majority leader, Dean G. Skelos, a Long Island Republican, offered his support in a written statement, saying, “This comprehensive plan will reduce the tax rate for middle-class families to their lowest levels in more than 50 years, create thousands of new private sector jobs and begin to turn our economy around.”

The agreement drew praise from an unlikely combination of business groups, which applauded the governor for devoting himself to job creation, and labor unions, which said the new revenue would help ensure that Mr. Cuomo would follow through with his promise to increase education and health care spending in the budget next year.

“We participated very heavily in reaching out to legislators to strike a deal that provided adequate revenues,” said Richard C. Iannuzzi, the president of New York State United Teachers. “It looks like they’ve done that.”

Some Democrats lauded the Occupy Wall Street movement for changing the political climate in Albany, where lawmakers had planned to allow the millionaires’ tax to simply expire.

“It’s a credit to the courage of the Occupy protesters on Wall Street, in Albany, in Buffalo and Rochester, and across the country,” said Michael Kink, the executive director of the labor-backed Strong Economy for All Coalition. “Albany is taxing the rich to create jobs, to allow better budgets and to provide tax relief for the middle class. Those are the things we were trying to make happen.”

But some liberals, inside and outside the Legislature, were dissatisfied. Billy Easton, the executive director of the Alliance for Quality Education, said the money to be raised by the new tax bracket was “not enough.” And Kenneth Brynien, the president of the Public Employees Federation, said the deal “falls short in obtaining the goal of a fair tax system.”

Some conservatives were also critical, including the Assembly minority leader, Brian M. Kolb, Republican of Canandaigua. “The bottom line is that taxes are being raised in New York State and we are still not dealing with our state’s serious spending problem,” Assemblyman Kolb said. “Tax hikes have never been the answer for creating more private sector jobs and long-term prosperity for New Yorkers.”