Once the rule goes into effect, applicants under the age of 18 will be exempt from the application fee when a parent or legal guardian is already a member of, or concurrently applying for NEXUS, SENTRI, or Global Entry.
Global Entry is increasing the membership fee from $100 to $120 on October 1, 2024. In addition NEXUS (which provides Global Entry, TSA PreCheck and expedited entry into Canada) will increase the fee from $50 to $120. Minors (under the age of 18) who apply at the same time as a parent or legal guardian will be exempt from the fee (currently they pay full price for Global Entry, NEXUS was already free).