A spokesman for the main labor union said months of talks with the Islamist-led government had finally reached an agreement today.
Bouali Mbarki of the UGTT union said the deal calls for three weeks of negotiations to appoint an interim, non-partisan government.
Tunisia has endured more than two years of turmoil, worsened by the assassination of a leading opposition figure in July.
As recently as a week ago, the union, which represents 500,000 workers, said talks on a way out of the country's political impasse had failed.
The death of Mohammed Brahmi, who was gunned down in front of his family on July 25, plunged Tunisia into its current crisis, as dozens of opposition lawmakers quit, freezing efforts to write a new constitution. Street protests and political paralysis have crippled the country.
Tunisia's protesters, inspired by the self-immolation of a fruit seller, overthrew their decades-old authoritarian government in January 2011.
Those protests spread through the Arab world, including to Egypt, Syria and neighboring Libya.
Before the 2011 fall of Tunisia's longtime dictator, the country had been known as one of the most secular countries in the Arab world.
