# Invoice design and custom invoice numbers

> Set the accent colour and logo on your invoices, and give them your own numbering with a prefix and a starting number.

Source: https://tentary.com/en/help/invoice-design/
Last updated: 2026-09-03

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Your invoices carry your logo and your colour, and you can match the numbering to your own bookkeeping.

You will find both under [**Settings > Invoice design & numbering**](https://app.tentary.com/settings/invoice-design). On the right of the page a **Preview** shows your changes straight away.

![The Customize your invoices page with accent colour, logo, custom invoice numbering and the preview](https://tentary.com/help/en/invoice-design/rechnungsdesign.webp)

## Customize your invoices

### Accent colour

The **Accent color** is used for the coloured elements on your invoice. Pick the colour your shop and your brand already use.

### Logo

Click **Upload logo** and choose an image file. The logo appears at the top of every invoice. Use **Change** to swap it later, or **Remove** to take it out again.

> **Tip:** Without a logo the invoice shows your company name as text. That is perfectly fine. A logo simply looks more professional if you have one.

When you are done, click **Save changes**.

## Custom invoice numbering

By default Tentary assigns invoice numbers automatically. If your bookkeeping needs a particular scheme, switch on **Custom invoice numbering**. You then decide how your invoices are numbered:

- **Prefix (optional):** a short string in front of the number, for example `RE-`. Letters, digits, hyphen and underscore are allowed.
- **Starting number:** the number your next invoice starts from. It has to be at least 1.

Once you save, Tentary counts on from that number. In place of the starting number you then see **Next number**. That field cannot be edited any more, because a number that has already been used must never repeat. You can still change the **Prefix**.

> **Important:** If you switch **Custom invoice numbering** off again, your counter is deleted. Turn the option back on later and you have to set a new starting number. Choose one above your most recently used number.

For how Tentary creates and sends invoices, read the article [Invoicing for sales](https://tentary.com/en/help/invoicing-for-sales/).