In 2013, Revilla and two other senators were implicated in the P10-billion pork barrel scam

In 2013, Revilla and two other senators were implicated in the P10-billion pork barrel scam involving businesswoman Janet Lim Napoles. Revilla was accused of diverting his Priority Development Assistance Fund (PDAF) for 2006 to 2009 to dubious non-governmental organizations linked to Napoles, who allegedly gave him P224.5 million in kickbacks. The Ombudsman filed plunder and graft charges against the senators before the Sandiganbayan, leading to his arrest in 2014. He was detained throughout his plunder trial, which started in January 2017 and ended in August 2018. Revilla was released in December 2018 after the anti-graft court acquitted him of plunder but ordered him to return P124.5 million to the National Treasury. In 2021, he was cleared of the 16 charges of graft for insufficient evidence.