What Microsoft is changing
The news came from an email to subscribers, not from a public Microsoft announcement. According to Tech.co's report on that email, Microsoft outlined several updates expected to roll out over the coming months to Family and Premium subscribers, and The Verge saw the same email. The changes fall into three groups.
1. Copilot for everyone on the plan. Microsoft will allow everyone included in an eligible subscription to access Copilot benefits and AI usage allowances. The email also says the plan owner will be able to manage AI access for younger family members. Neowin likewise reported that subscribers will also be able to manage AI access permissions for family members who are minors.
2. One shared AI allowance. Instead of maintaining separate limits for individual AI features, subscribers will receive a shared AI usage allowance that can be used across supported advanced AI tools. Thurrott reports that if needed, Microsoft 365 Premium and Pro subscribers will be able to purchase additional AI credits.
3. Less storage, shared by everyone. Each member on the same subscription currently gets 1TB of OneDrive storage. Microsoft will replace that with 2TB of shared storage for its Microsoft 365 Family subscription, while the Microsoft 365 Premium and Microsoft 365 Pro plans will get 2TB and 5TB of shared storage, respectively. Primary subscribers will still be able to add up to five additional members on the same plan.
In short: five more people get Copilot, everyone draws from one AI allowance, and the storage maximum drops from as much as 6 TB to a 2 TB pool.
Not live yet: Microsoft's own pages still say owner-only
Microsoft's current support documentation hasn't caught up with the email. Its page explaining AI credits and limits for consumer plans, last updated in October 2026, still says AI benefits are only for the subscription owner and can't be shared. Its page for people invited to a shared subscription says the same about AI features.
That doesn't mean the change won't happen. It means it hasn't rolled out. If your teenager can't use Copilot in Word today, nothing is broken.
Some important details are still unknown:
- How big the shared AI allowance is
- How different features count against it. A quick rewrite in Word probably costs less than a Researcher session or image generation, but Microsoft hasn't published any rates.
- How often the allowance resets
- What extra AI usage will cost
- Whether owners can give some members more AI usage than others, or only switch access on and off for younger members
- When the rollout starts in each region
Microsoft's AI-limits page also shows that the plans currently differ. Family gets "standard usage" for features like Voice, Vision and image generation. Researcher, Analyst and the Cowork preview are listed as unavailable on Family but available on Premium and Pro. The same page says limits can vary by feature, entry point and system conditions, and may change as new AI models arrive. A shared Family allowance will probably keep those tier differences. "Copilot for everyone" does not mean everyone gets Premium features.
The storage change: dates and details
The storage change is more firmly scheduled than the AI change. WindowsForum's earlier coverage cited ZDNET, which reported that a Microsoft spokesperson confirmed that shared storage applies to new and upgraded subscriptions starting October 8, 2026, while existing subscribers transition at their first renewal on or after May 2, 2027.
Microsoft's dedicated support page on the storage change gives the same dates. One of its other support pages, however, gives October 7, 2026 for new plans and April 1, 2027 for existing renewals. The October 8 and May 2 dates appear in more places, including the spokesperson's statement and the subscriber email. If your renewal falls between April and May 2027, check the email Microsoft says it will send before your plan changes.
Here is what the support documentation says about how the pool works:
- Files stay private. Members share the space, not the contents. Each person's mailbox, files and folders remain private unless they choose to share them.
- Storage add-ons go into the pool. Extra storage bought by members adds to the shared total, and the plan can be extended up to 10 TB.
- You won't lose files right away. If the household goes over its limit, Microsoft says members can still access their files for up to a year while they sort out their storage.
- Some existing subscribers may get bonus storage. Existing subscribers in eligible markets may qualify for transitional bonus storage, according to a Microsoft support note. Microsoft hasn't said which markets qualify or how much storage is involved.
Microsoft says the reason is flexibility. A member who needs more than 1 TB can now use space others aren't using. That's true for families with very uneven use. For a household where several people store lots of photos and video, Analytics Insight notes, families that store large photo libraries, videos, and work files could find the new limit restrictive.
Who benefits and who loses
| Household type | Likely outcome |
|---|---|
| Several people want Copilot, storage use is light | Clear win: Copilot access without buying separate plans |
| One heavy OneDrive user, others barely use it | Probably fine: the pool lets the heavy user go past 1 TB |
| Several people each storing hundreds of GB (photos, video, phone backups) | Likely loss: may need to buy add-on storage |
| Heavy Copilot users on Family | Unclear: depends on the size of the shared allowance, which hasn't been announced |
Our analysis is that one person's habits now affect everyone else, for both storage and AI. If one member fills OneDrive with 4K video or uses the AI allowance heavily, the rest of the family has less. Microsoft hasn't documented per-member storage limits, and we won't assume they exist.
What to do now
- Check your storage use. Open your Microsoft account dashboard and add up what each member is using. If the household total is near or over 2 TB, start planning before your renewal.
- Check your renewal date. It determines when pooled storage applies to you. Existing subscribers stay on 1 TB per person until their first renewal on or after the transition date.
- Watch for Microsoft's email. Microsoft says it will notify customers before their storage changes.
- Find AI usage in your account. Microsoft's support page says you can check limits and AI credits under Services & subscriptions in your Microsoft account. That is probably where the shared allowance will show up.
- Don't buy a separate Copilot plan for a family member yet. If they're already on your Family or Premium plan, it may make sense to wait for the rollout.
The bottom line
Giving all members Copilot fixes a real problem: paying for a six-person plan where only one person got the main new feature never made much sense. But the AI change is still only described in an email, with no published limits or prices. The storage cut, by contrast, is confirmed and dated. A full household's maximum storage drops from 6 TB to 2 TB.
If your family is excited about Copilot but stores little in OneDrive, this is good news. If everyone's phone backs up to OneDrive and you also have years of video, check your storage totals before your renewal comes up.