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> If you want to make sure that your subscription is automatically extended at the end of its term, you can add a credit card or bank account, and then change the recurring billing setting for that subscription.6. When you're finished, go to the <a href="https://go.microsoft.com/fwlink/p/?linkid=2024339" target="_blank">Admin center</a> to manage your subscription.## Extend the expiration date for an existing subscriptionTo extend the expiration date for your prepaid subscription, you must use a new, unused product key for the same Microsoft plan. Entering your original product key won't work because a key that has already been redeemed can't be used again.1. Go to the <a href="https://go.microsoft.com/fwlink/p/?linkid=2024339" target="_blank">Microsoft 365 admin center</a>.- If you're using the **Simplified view**, select **Billing**.- If you're using the **Dashboard view**, go to the **Billing** > <a href="https://go.microsoft.com/fwlink/p/?linkid=842054" target="_blank">Your products</a> page.2. Select the subscription that you want to extend.3. On the subscription details page, in the **Subscription and payment settings** section, select **Extend end date**.4. On the **renew or add user licenses** page, select **Use a new and unused product key**, then select **Next**.5. Enter the product key, then select **Next**.> If you have more than one product key, you can select **Add another product key** to enter them.6. Review your order details, then select **Redeem**.## Next stepsIf you're new to Microsoft 365 for business, learn how to set up Microsoft 365.Check out this list of common product key errors and solutions: Problems with your Microsoft 365 for business product key?## Related contentUpgrade or change to a different Microsoft 365 for business plan (article)\What happens to my data and access when my Microsoft 365 for business subscription ends? (article)\