Running the Office on Microsoft 365 Family? Read This Before Your Renewal.
Microsoft is turning six separate terabytes into one shared 2TB pool and starting to share Copilot across the plan. For a small office on a home plan, it's a good moment to decide where the business lives.
By John Martines · October 14, 2026 · 6 min
Microsoft 365 Family and Premium are moving to one shared 2TB of storage, and Copilot is being shared across the plan. If your business runs on a home plan, here is what changes, when, and the calm way to move.
A three-person contracting office has run on one Microsoft 365 Family subscription for years. The owner pays for it. His office manager and his estimator each got an invite. Everyone has Word, Excel, Outlook and a terabyte of OneDrive, and the whole thing costs about $130 a year. It has always seemed like the best deal in software.
This month Microsoft changed the deal. And the change is a good reason to look at a question most small offices never asked: should the business be on a family plan at all?
Microsoft sells two kinds of Microsoft 365. The home plans (Personal, Family, Premium) are bought with a personal Microsoft account, usually an Outlook.com or Gmail address. The business plans (Business Basic, Standard and Premium) run on work accounts that the business owns and manages from one admin screen.
Two things are changing on the home side.
Storage becomes one shared pool. Until now, each of the six people on a Family plan got their own 1TB of OneDrive, up to 6TB in all. Under the new model, Family and Premium include 2TB shared by everyone on the plan. Files stay private: each person still sees only their own files unless they share them. What's shared is the space. You can buy add-on storage up to 10TB in total.
Copilot is being shared. Until now, Microsoft's terms said the AI features in a Family plan belonged to the subscription owner only. Reports from October 9 say the owner will be able to share AI access with up to five others, drawing on one shared AI allowance, rolling out over the coming months. Microsoft hasn't said how big that allowance is, and some of its own pages still describe the old owner-only rule, so treat this part as coming, not here.
How it got here:
- January 2025: Microsoft added Copilot to Personal and Family and raised prices for the first time in about 12 years. Family went from $99.99 to $129.99 a year in the US.
- October 2025: Microsoft launched Microsoft 365 Premium at $19.99 a month, combining Family with Copilot Pro.
- July 1, 2026: Business plan prices rose at renewal. Business Basic went from $6 to $7 per person per month and Business Standard from $12.50 to $14 (US list prices, annual commitment).
- October 8, 2026: New and upgraded Family and Premium subscriptions started on the shared 2TB pool. Existing subscriptions move at the first renewal on or after May 2, 2027, and Microsoft says it will email you before then.
If your office runs on a home plan, three things are worth knowing.
The storage math may not work. If three people each keep 600GB of job photos, drawings and scanned paperwork, you're already near the 2TB ceiling. Microsoft says you won't be cut off the day you go over: you get warnings and up to a year to clean up, buy more or upgrade. But it's better to know now than in May 2027.
Shared AI is still personal AI. When Copilot arrives for your office manager through the Family plan, it runs on her personal Microsoft account. That is the same problem as a free ChatGPT account: the work and the history belong to her, not the business. Our piece [Free AI Can Now Make Your Proposals. Keep Them in a Company Account.](/articles/company-work-company-accounts) walks through why that matters.
Nobody can hand you the keys. On a home plan, each person signs in with their own personal account. When someone leaves, their email, their OneDrive files and their AI history leave with them, because you can't reset their password or take over their mailbox. Business plans exist mostly to solve that. Microsoft's license terms for using home plans for work have also shifted over the years, so read the current terms rather than relying on what was true when you signed up.
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