When a customer wants to upgrade or downgrade, you can change their service plan. This guide covers switching plans on a subscription.

### Changing a Customer Plan

1. Log in to **Plesk**.
2. Go to **Subscriptions**.
3. Select the subscription.
4. Click **Change Plan**.
5. Select the new plan.
6. Click **OK**.

The subscription updates immediately. If the new plan has fewer resources, existing data is not deleted — the customer simply cannot add more.

### Important Notes

- If the subscription is **locked**, unlock or sync it first.
- Consider the impact of downgrading on the customer current usage.

### Troubleshooting

**"Subscription is locked" error:**

- Click **Sync** on the subscription, then retry the plan change.

### Related Guides

- [Create the target plan](/hc/help/en/articles/how-to-create-a-service-plan-in-plesk)
- [Synced vs locked](/hc/help/en/articles/understanding-synced-vs-locked-subscriptions-in-plesk)
- [For a specific customer](/hc/help/en/articles/how-to-create-a-customer-account-in-plesk)