# How is my invoice calculated? Unlike most other invoices, sipgate operates on a prepaid model. Your invoice lists the charged amount under **Telephony Credit**—this balance is generated through automatic debits, bank transfers, or manual top-ups from your account. As an account administrator, you can find your monthly invoices under **Account & Bills** in your account settings. Additionally, invoices are sent to the email address specified under **Billing Address** in your account. For a detailed breakdown of all transactions, you can access the **sipgate Account Statement** under **Account & Bills ➔ Invoices**. This allows you to see exactly how each charged amount was used. You may not receive an invoice or charge every month. If your balance remains above the minimum threshold after deducting all costs, a new charge will only be triggered later when necessary. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://teamhelp.sipgate.co.uk/account-management/account-crediting-billing-settings/how-is-my-invoice-calculated.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.