To change a Microsoft 365 subscription from yearly to monthly, the past-due balance must be cleared first. The system will block switching plans or changing how to pay while any amount is overdue.
Key points for this situation:
- A past-due balance of $99 must be paid before switching from yearly to monthly.
- After the past-due amount is paid, the billing plan can be changed online:
- Go to https://account.microsoft.com/services and sign in with the account that owns the subscription.
- Find the subscription and select Manage.
- Select Switch plan to change between annual and monthly payments.
- If Switch plan or Change how you pay does not appear, make sure:
- Recurring billing is turned on for the subscription.
- The subscription is not already prepaid for a fixed term.
- If payment fails when trying to clear the past-due amount, update or change the payment method:
- On the same Services & subscriptions page, choose Manage → Change how you pay, or add a new payment method and try again.
If paying the full past-due amount at once is not affordable, the only supported options in the documentation are either to clear the past-due balance so the subscription can continue or allow the subscription to expire by not paying, in which case access to the subscription and its services will eventually stop.
For personalized help with billing difficulties (including income constraints or possible adjustments), contact Microsoft Support using the billing/support paths described in the referenced articles, as only the billing team can review account-specific options.
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