💡 At a glance: Revenue → Create invoice → select a client → check your details → add your items → save & send
To generate a valid invoice, Accountable needs a few details from you first : your IBAN, your address and your VAT number. Without these, your invoice won't be valid, and worse, you won't get paid 😉
So, make sure to fill these in your Account > Settings > Personal details.
Now, let's create your invoice step-by-step !
This is where all your sales invoices and income appear.
Pick an existing client from your list, or create a new one by adding their name, address, VAT number, etc.
Invoice number: You can either let the app number it automatically, or enter it manually once in the format you prefer. After that, it increments automatically 🙂
💡 Our tip : update your numbering at the start of each year (e.g. 2026-001, 2027-001) to keep things clear.
Issue date and due date
Service date, if your service covers a specific period → you can check our article How to create an invoice with a service period ?
Check if all your personal details are shown correctly. Otherwise, click on the section and fill in the right information and don’t forget to save the changes :
Your first name and last name
Your company name (if applicable)
Postal address
VAT number
Click on 'add a new item'
Select either an item registered previously in your price list, or 'Add a new item' :
Fill in the item name
Description (optional)
Category (sales of goods or services or any other income source like real estate rental, copyright revenue, donation,…)
Quantity
Unit price and VAT rate (pick the right one depending on your sector)
Click on 'Add item' and repeat for as many items as you need
💡 Our tip: save an item to your Products & Services list to reuse it on future invoices without retyping it 😉
In the sections below, you can add/modify :
Your banking information (IBAN, BIC)
Your email address and/or phone number
Notes & comments (optional)
Terms & conditions (optional - if you add any, it will be automatically saved for your future invoices)
Optional settings you can adjust if needed:
Switch the language of the invoice (English, French, Dutch)
Add a QR code for payment
Set a structured communication
Add a down payment → if you received a deposit before delivery, here’s more info on how to make a down payment invoice
Implement instalments → if you bill a project in several stages, here’s a step-by-step guide to use instalment invoices
Change the billing currency
Customise the look of your invoice: add your logo and your colours, choose the template and font
Specify the invoice status
If your invoice is ready or if you want to save it for later, click the 'Continue' button (top right), and then click on :
‘Save & prepare to send’ to send it directly to your client via Accountable
or ‘Save & download PDF’ to save it and download it on your desktop
or ‘Save & quit’ if you want to save it for later and apply future modifications before sending
If you chose the option to send your invoice directly via Accountable :
Don't forget to switch on the green 'Send the invoice via Peppol' toggle, this is what actually sends your invoice through the Peppol network → ⚠️ An error message might appear if you're not registered on Peppol yet, and/or if your client isn't registered either → in that case, you won't be able to send your invoice via Peppol.
You can also modify the email description that is generated automatically by the AI
Make sure to type your client’s email address correctly
💡 Our tip: sending a test invoice to yourself first is a great way to check everything looks right before sending it to a real client.
Want to learn more? Join our upcoming webinar 'From start to success: making the most out of Accountable', hosted live by one of our tax coaches to answer your questions!
Our Help Center also gathers all our articles to support you day-to-day in managing your business.
And for any questions you may have, we're here to help in the chat or by email at support@accountable.eu 😊
Author - Valesca Wilms
As content marketing lead at Accountable Belgium, Valesca writes about freelancing, self-employment, and taxes based on her own experience as a freelancer.
Who is Valesca ?Thank you for your feedback!
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01/05/2026
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04/05/2026
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23/04/2026
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15/04/2023
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22/03/2026
