Use a different Apple ID to share purchases with Family Sharing
If you have more than one Apple ID and you want to use a different one to share purchases with your family, you can change the account that you use for purchase sharing.
Change the Apple ID that you use for purchase sharing on your iPhone, iPad, or iPod touch
You can change the Apple ID that you use to share purchases with your Family Sharing group once every 90 days.
In iOS 16 or iPadOS 16 or later
Tap Settings, then tap Family.
Tap your name.
Tap Apple ID.
In the note underneath your Apple ID, tap Share using secondary Apple ID.
Enter the Apple ID and password that you want to use.
Tap Use this Apple ID.
In iOS 15 or iPadOS 15 or earlier
Tap Settings > [your name], then tap Family Sharing.
Tap your name.
Tap Account.
Erase the Apple ID that's listed, then enter the Apple ID and password that you want to use.
Tap Use This Account.
Change the Apple ID that you use for purchase sharing on your Mac
You can change the Apple ID that you use to share with your Family Sharing group once every 90 days.
In macOS Ventura or later
Choose Apple menu > System Settings.
Click Family.
Click your name.
In the note underneath your Apple ID, click Share using secondary Apple ID.
Enter the Apple ID and password that you want to use.
Tap Next and follow the onscreen instructions.
In macOS Monterey or earlier
Choose Apple menu > System Preferences.
Click Family Sharing, then click Details next to your name under the Family members list.
Click Edit.
Click Change.
Enter the Apple ID and password that you want to use.
Tap Next and follow the onscreen instructions.
What happens when you change the Apple ID that you use to share media purchases and subscriptions?
After you change the Apple ID that you use for Family Sharing, your family members can access or download purchases from that account. However, they'll no longer be able to access purchases or subscriptions from your previous account. This includes DRM-protected music, movies, TV shows, books, apps, or in-app purchases that they downloaded from your previous account, as well as any media subscriptions tied to that account.