Microsoft 365 Family Review: Six People, One Bill, Any Real Catch?

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Microsoft 365 Family is the same subscription as Personal shared with up to six people, each with their own account, their own installations and their own terabyte of OneDrive. There is one real catch and Microsoft states it plainly: the AI benefits are available only to the subscription owner and cannot be shared.

1. Buy it if two or more people in the household need the apps and the storage, because it covers up to six for one bill.
2. Buy it for the storage model. Each person gets their own terabyte and their own private files; nobody sees anyone else’s.
3. Skip it if it is only ever going to be you. Microsoft 365 Personal is the same product for one person.
4. Skip it as a way of giving the whole household Copilot. The AI credits belong to the subscription owner alone.
5. Skip it for anything commercial. The Microsoft Services Agreement puts the consumer plans on personal, non-commercial use, whoever is using them.
6. Compare it with Microsoft 365 Premium if AI is the point, since that plan covers the same one to six people with the highest Copilot usage limits.

The six terabytes are not a pool. Each person has one terabyte that cannot be transferred, so a household with one heavy user and five light ones cannot rebalance it.

If that answers the headcount question you can stop here. The rest covers how sharing works, what happens when somebody is removed, and the storage behaviour that catches people out when a subscription ends.

Why it happens

Sharing works through the Microsoft family group. The person who buys the subscription invites up to five others, each of whom needs a Microsoft account of their own. Once an invitation is accepted, that person gets their own installations on their own devices, their own terabyte of OneDrive, and the subscriber features on their own mailbox. There is no shared drive and no shared library: Microsoft’s own guidance is that none of your personal files, mail, appointments, contacts, photos or notebooks appear in the shared family locations.

That privacy is the plan’s best feature and the source of its most common misunderstanding. Six terabytes sounds like a pool and is not one. Storage is a terabyte per person and it cannot be transferred, so if one member is storing a photographic archive and five are storing almost nothing, the answer is more storage on that person’s account rather than a reallocation.

The AI benefit is where the marketing and the mechanics diverge, and it is worth quoting Microsoft rather than paraphrasing: AI benefits are only available to the subscription owner and cannot be shared with others. Everybody on the plan still gets the applications, the storage and the mailbox features. Only the owner gets the in-app Copilot features and the monthly AI credit allowance, which Microsoft publishes as 60 a month for Personal and Family at the time of writing. If the household’s reason for choosing Family is that everyone will use Copilot in Word and Excel, that reason does not hold.

Above Family sits Microsoft 365 Premium, which covers the same one to six people with the same terabyte each, and adds the highest available usage limits for Copilot along with the agent features. The AI restriction is identical there – the benefits belong to the subscription owner – so Premium is the answer for a household with one heavy AI user, not for six.

Removing somebody, or cancelling, is the part to plan before you do it rather than afterwards. Microsoft’s guidance on leaving a family group is blunt: the person loses the terabyte of OneDrive storage, which reverts to its previous size, and loses access to the fully functional desktop applications. Since the free allowance is 5 GB, anyone who has been treating their terabyte as a disk needs warning and time. Over the limit, files remain but become read-only, an account more than three months over is frozen, and after six months Microsoft may delete the OneDrive and its contents.

One more term applies to everybody covered, not just the buyer. The Microsoft Services Agreement puts Microsoft 365 Family and Personal on personal, non-commercial use unless separate commercial rights exist. A family member running a small business from a Family seat is not licensed for it, whatever the software allows.

Full reference

What each person gets, and what only the owner gets

Personal, Family or Premium

Before you invite anybody

1. Count the people who will actually install it. Relatives who accept an invitation and never sign in add nothing to the value.
2. Make sure each of them has a Microsoft account, because the invitation attaches to one.
3. Tell them the storage is theirs and private, and that it is not a shared family drive.
4. Tell them what happens if the subscription ends or they leave the group, before they move their only copy of anything into it.
5. If AI is the reason for the purchase, decide who the subscription owner is, because that is the person who gets it.

Leaving, removing and cancelling

• A member who leaves or is removed loses the terabyte, which reverts to the previous size, and loses access to the fully functional desktop applications.
• The free OneDrive allowance is 5 GB. Anyone over it after the change has read-only files rather than deleted ones, at first.
• More than three months over the limit and the account is frozen; after six months Microsoft may delete the OneDrive and everything in it.
• Cancelling affects five other people at once, so give notice and time rather than discovering the consequences together.
• Nothing about leaving deletes files immediately. The risk is the slow version, which is worse because nobody is watching for it.

Where Family is the wrong purchase

• A household of one. Personal is the same product and costs less.
• A household buying for Copilot across several people, since the AI benefits sit with the owner alone.
• Anyone using it for work, which the Services Agreement excludes regardless of who they are.
• A single shared PC where nobody wants a recurring bill: a perpetual Office licence covers that machine for five years.
• A small team pretending to be a household. It is a licensing problem rather than a clever saving.

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