## Zoho Billing - Product, solutions, integrations, support, and resources Index

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# How do I change the default Invoice Number?

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To change the default format of the invoice number:

*   Go to **Settings** from the top-right corner.
*   Select **Invoices** under _Sales_.
*   Enter a **Prefix** and **Next Number** under _Invoice Number_ in the General tab.

**Note:** The **Prefix** that you enter will remain constant. However, the **Next Number** will be incremented by **1** for every subsequent invoice. For example, if your Prefix is INV and your Next Number is 001, this is what your invoice numbers would look like, in order of generation: INV-001, INV-002, INV-003 and so on.

*   Click **Save**.

Now, the invoices that are generated will follow this format for their invoice numbers.

**Insight:** If you need multiple numbering formats for your invoices, for example, different prefixes for different locations or transaction years, you can configure them using [Transaction Number Series](/en-ng/billing/help/settings/customisation/transaction-number-series.html) under _Customisation_ in _Settings_.

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