Semi-Pelagianism (or semipelagianism) is a historical Christian theological and soteriological school of thought about the role of free will in salvation. In semi-Pelagian thought, a distinction is made between the beginning of faith and the increase of faith. Semi-Pelagian thought teaches that the latter half – growing in faith – is the work of God, while the beginning of faith is an act of free will, with grace supervening only later.
The term "semi-Pelagianism", a 16th-century coinage, is considered a misnomer by many modern scholars. "Semi-Pelagianism" has frequently been used in a pejorative sense.