How do I create my first invoice?

Before you start

Make sure your company details are complete under Settings → Company details: business name, Chamber of Commerce number, VAT number, IBAN, and invoice address. Declair fills these in automatically on every invoice.

Step 1 — Add a customer

1. Go to Customers in the menu.
2. Click New customer.
3. Enter at least the company name and email address (for sending the invoice).
4. Save the customer.

Tip: Add your most frequent customers upfront. When creating a new invoice, you select them with one click.

Step 2 — Create the invoice

1. Go to Invoices → New invoice.
2. Select the customer.
3. Add line items: description, quantity, price, and VAT rate (0%, 9%, or 21%).
4. Check the invoice date and payment term (default 14 or 30 days).

You can add products from your catalogue via Products, or type line items manually.

Step 3 — Review and send

1. Check the PDF preview on the right to make sure everything is correct.
2. Click Send to email the invoice, or Download for a PDF.
3. The invoice automatically receives a unique invoice number.

Add a payment link (optional)

Want to get paid faster? Connect Mollie under Settings → Payments and add an iDEAL payment link. Your customer can then pay directly from the email.

Common mistakes

• Missing VAT number — required on invoices to business customers.
• Wrong VAT rate — 21% is standard; 9% only for specific goods/services.
• No description per line — every line item must clearly state what you delivered.