Mahaut was the eldest daughter of Guigues III of Albon and Matilda of Hauteville.
[2] Mahaut is noted as the countess of Savoy when she acted as a donor to the convent in Ripalta on 9 January 1137.
When she gave birth to an heir in 1136, Savoy was spared a succession crisis.
Because of her marriage alliance, her father assisted her spouse in the military expedition in Grésivaudan in 1140, and died in battle in 1142.
According to tradition, she was the founder of the charity establishment Pain de mai, which provided food to people during famine.