License & Subscription Issues

How to Change Microsoft 365 Billing Name and Add a GST Number

Natalie Taylor Sep 28, 2026 869 views

Question details

The user needs to update the billing name and add a GST or tax registration number to their existing Microsoft 365 subscription profile.

How to Change Microsoft 365 Billing Name and Add a GST Number

Product: Microsoft 365
Device & OS: not provided
Scenario: Updating tax and billing information for an active subscription to ensure correct invoicing.
Observed behavior: The user wants their tax invoice to accurately reflect the correct billing name and GST number for accounting and tax compliance purposes.

Before you start

Ensure you have your Microsoft account admin credentials ready and your company's official GST or tax registration number on hand before attempting to update your billing profile.

Solution 1Recommended

Update Billing Information in the Microsoft Account Portal

Attempt to change the billing name and add a GST number directly through your Microsoft account settings.

Tax invoice options and registration-number requirements vary depending on your account type (Personal vs. Business) and region. Reviewing Microsoft's official tax invoice guidance for your specific locale is highly recommended.

Log in to the Admin Center

Navigate to the Microsoft 365 Admin Center or your personal Microsoft Account portal and log in with your administrative credentials.

Navigate to Billing

Click on the 'Billing' section in the left-hand navigation menu, then select 'Billing accounts' or 'Payment options'.

Edit Tax Details

Select your active Microsoft 365 subscription and click on 'Edit tax registration number' or 'Update billing profile'.

Save Changes

Enter your new billing name and valid GST or tax registration number, then click 'Save' to apply the changes to future invoices.

Update Billing Information in the Microsoft Account Portal

Solution 2

Contact Microsoft Billing Support for Manual Updates

If the option to update GST details is unavailable in your portal, contact Microsoft support for direct assistance.

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Frequently Asked Questions

Why can't I see the option to add a GST number in my Microsoft account?

The ability to add or modify a GST number depends on your account type and region. If your region requires specific tax documentation or your account type (like a personal account) doesn't support self-service business tax changes, you will need to contact Microsoft billing support.

Will changing my billing name affect my current Microsoft 365 subscription?

No, updating your billing name or adding a tax registration number only updates your invoicing details for future billing cycles and does not disrupt your active subscription services or access to Office apps.

How long does it take for the new GST number to appear on my tax invoice?

Once updated and verified, the new billing name and GST number will typically appear on the tax invoice generated for your very next billing cycle. Past invoices usually cannot be retroactively modified.

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