Thailand's anti-graft body has indicted ousted leader Yingluck Shinawatra over a controversial rice subsidy scheme.
The case will now be voted on at the Senate. If impeached, Yingluck will be barred from politics for five years.
On Wednesday, the Thai Constitutional Court ordered Yingluck and several cabinet ministers to step down.
Thailand has been in political turmoil since anti-government protests erupted in November 2013. In February, snap elections were annulled.
Under the rice subsidy scheme, the government bought rice from Thai farmers at a much higher price than on the global market.
However, it resulted in the accumulation of huge stockpiles of rice and hit Thailand's rice exports hard.
Critics said the scheme was too expensive and vulnerable to corruption.