The central government said Thursday that the country has been admitted as a candidate for membership in the Organisation for Economic Co-operation and Development.
Costa Rica has been trying to join the 34 nation group after the organization branded the country as a tax haven in 2009. Costa Rica took steps to remove that label.
The country officially sought membership in May 2013.
The organization also extended an invitation this month to Lithuania.
The Organisation for Economic Co-operation and Development has been waging a battle against countries it sees as tax havens.
It is pushing for transparency and the transfer of tax information among countries.
To become a member, the central government must submit a formal agreement for approval by the legislature.