based off of / based on
The preposition after based.
Use based on. Based off and based off of are not the standard forms.
Examples
UseThe claim is based on the study.
AvoidThe claim is based off of the study.
The preposition after based.
Use based on. Based off and based off of are not the standard forms.
UseThe claim is based on the study.
AvoidThe claim is based off of the study.