When Alois died in 1903, he left her a government pension. She sold the house in Leonding and moved with young Adolf and Paula to an apartment in Linz. Three or four years later, she was diagnosed with breast cancer. After many painful iodoform treatments given by her doctor, Eduard Bloch, Klara died at home in Linz from the toxic medical side-effects on December 21, 1907. Adolf and Paula were at her side. Klara was buried in Leonding near Linz.