Portugal is enacting broad debt-reduction measures, including tax hikes and pay and pension cuts, in return for a
euro78 billion ($102 billion) international financial lifeline it received in May 2011. Those austerity policies are widely blamed for the deepening recession and growing hardship.
The National Statistics Institute said Monday that a drop in private consumption and slower export growth were the main factors behind the slump, with the economy shrinking 3.8 percent in the fourth quarter.
Unemployment stands at 17.6 percent, the third-highest rate in the 27-nation bloc after Greece and Spain.
The economy contracted 1.6 percent in 2011. The government predicts a 2 percent contraction this year.