Bonfoh was born in Kabou, Bassar Prefecture. From 1980 to 1985, he was Regional Director of Educational Planning in Kpalimé, and in August 1986 he became Regional Director of Educational Planning in Kara, serving in the latter post until 1999. He was elected to the National Assembly in the March 1999 parliamentary election, standing as the RPT candidate in the Third Constituency of Bassar Prefecture and winning the seat with 90.68% of the vote. He was re-elected from Bassar in the October 2002 parliamentary election. In the National Assembly, he served as First Rapporteur of the Socio-Cultural Development Committee and was elected First Vice-President of the National Assembly. He became President of Togo when President Faure Gnassingbé resigned due to pressure from the international community in February 2005. Bonfoh, who was First Vice-President of the National Assembly at the time, was elected as President of the National Assembly and thus became acting President of Togo prior to a new presidential election. Bonfoh is a strong supporter of Gnassingbé, and was deemed a "chairwarmer" by some of his opponents because his temporary assumption of the presidency was meant to enable Gnassingbé to eventually become president in a seemingly more legitimate way. On April 23, 2005, Bonfoh dismissed the interior minister for advocating a delay in the election amidst massive street protests. Gnassingbé officially won the election on April 24 and was sworn in on May 4, replacing Bonfoh. In the October 2007 parliamentary election, Bonfoh ran for re-election to the National Assembly as the first candidate on the candidate list of the ruling Rally of the Togolese People in Bassar, and he was successful in winning a seat. On November 24, 2007 he was re-elected as President of the National Assembly. Abass actively campaigned for Gnassingbé prior to the March 2010 presidential election. Following the election, in which Gnassingbé won a second term, Abass said in May 2010 that the people wanted "tangible achievements" and that Gnassingbé was delivering them. He particularly noted the importance of improving the availability of potable water, quality education, and medicine, and he anticipated that Gnassingbé would make continued progress on those issues. Abass also discussed the need to move forward with institutional and constitutional reforms, anticipating that relevant draft laws would soon be submitted to the National Assembly and quickly approved. He dismissed rumors of an impending dissolution of the National Assembly. Following the July 2013 parliamentary election, Dama Dramani, another Gnassingbé loyalist, was elected to succeed Abass on 2 September 2013.
Party positions
Bonfoh is a member of the Political Bureau of the RPT and a member of the RPT Central Committee from Bassar Prefecture as of the RPT's Ninth Ordinary Congress in December 2006.