Paying off one’s parents debt:<a href="#_ftn1" name="_ftnref1">[1]</a>
A child is not obligated to pay off his father’s debt, unless his father has passed away and he has inherited money from his father. There is not even a Mitzvah involved in using his own money to pay it off.
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<a href="#_ftnref1" name="_ftn1">[1]</a> Admur C.M. Mechira Halacha 7; Michaber C.M. 107:1; Hagahos Ashri Kesubos 9:14; Smeh 107; Gilyon Maharsha 240; Pesakim Uteshuvos 240:32

Shulchan Aruch HaRav | Paying off one’s parents debt

Paying off one’s parents debt:[1] A child is not obligated to pay off his father’s debt, unless his father has passed away and he has inherited money from his father. There is not even a Mitzvah involved in using his own money to pay it off. _____________________________________ [1] Admur C.M.