The nonpartisan Congressional Budget Office (CBO) said Tuesday that unless lawmakers act to prevent scheduled tax increases and spending cuts at the end of the year, a recession will likely result in early 2013.

Early next year income taxes are set to go up when the Bush-era tax rates expire. Automatic spending cuts totaling roughly $109 billion triggered by last August’s debt-ceiling deal are set to hit. Meanwhile, payments to physicians under Medicare will be slashed.

CBO projects that these and other elements of the so-called “fiscal cliff” will cause the economy to contract as demand dries up.