Swiss Invoice: 9 Required Fields Every Business Needs

A missing field on an invoice can prevent your customer from claiming input tax deduction — or leave you in a weak position if a payment dispute arises. The good news: the requirements for a valid Swiss invoice are clearly defined. This article shows which nine fields no template should lack, and where the most common gaps occur.

Why Invoice Completeness Matters

Under Swiss law, an invoice is a legally binding accounting document. For VAT-liable businesses, it forms the basis for input tax deduction on the recipient's side. If a mandatory field is missing, the Swiss Federal Tax Administration (SFTAX) can deny the deduction — to your customer, not to you. This creates pressure from the other side and unnecessarily damages client relationships.

For every invoice template: completeness is not bureaucratic overhead, but self-protection.

The 9 Required Fields at a Glance

1. Name and Address of the Invoice Issuer

Your full business name or personal name as a sole trader, plus street, house number, postal code and town. A PO box address alone is insufficient.

2. Name and Address of the Invoice Recipient

The invoice must be addressed to a clearly identifiable person or company. For B2B invoices, the exact business name matters — the recipient must be able to assign the invoice to their accountant or bookkeeper.

3. Invoice Date

The date on which the invoice is issued. It determines which VAT accounting period the transaction falls into. For net accounting systems, this date is particularly important.

4. A Unique Invoice Number

Numbering must be sequential and without gaps. Popular formats: 2026-0047 or INV-20260047. Critical: once assigned, the same number must never appear again — even after a correction. Corrections are handled via a separate credit note.

5. Description of Service or Goods Delivered

What exactly did you supply or perform? "Services June" is not enough. Better: "Web design for landing page, Project XY, 14–28 May 2026, 12 hours at CHF 130 per hour". The more precise, the fewer follow-up queries — and the stronger your position in any payment disputes.

6. Net Amount (before VAT)

The net amount must be clearly visible before tax is added. This applies even if you combine different tax rates on one invoice — for example 8.1% on standard services and 2.6% on printed materials.

7. Applied VAT Rate and VAT Amount

For each service type, state separately: net amount, applied rate (8.1%, 3.8% or 2.6%) and the resulting VAT amount in CHF. Never mix rates in a single line.

Service	Net CHF	VAT Rate	VAT CHF
Consulting	2'000.00	8.1%	162.00
Trade journal	45.00	2.6%	1.17
Total	2'045.00		163.17

8. VAT Number of the Invoice Issuer

Format: CHE-123.456.789 VAT. This field is mandatory only if you are VAT-liable. If your annual turnover is below CHF 100'000, you are not required to register for VAT — and therefore this field is not required. For more details on how to proceed correctly when this number is not applicable, see the guide on invoicing without a VAT number.

9. Payment Details

IBAN or QR-IBAN, bank name and account holder. For Swiss payment transactions, a QR-bill is now the standard — it greatly simplifies processing for the recipient. The technical requirements for creating a correct QR-bill have been relevant for all Swiss businesses since the end of the orange payment slip in 2022.

Optional Fields That Still Make Sense

Mandatory fields cover the legal minimum. In practice, these voluntary fields improve payment flow and customer communication:

• Payment deadline: "Payable by 15 July 2026" — without this, 30 days applies by law, but explicit dates accelerate payment.
• Discount terms: "2% discount if paid within 10 days" — particularly effective for larger amounts.
• Service period: When was the service performed? Not necessarily the same as the invoice date.
• Project name or order number: Helps the recipient assign it internally.
• Your bank details in plain text: In addition to the QR-IBAN, if the recipient needs to set up a manual payment order.

Common Gaps in Practice

Missing service period: Especially with recurring mandates or retainer contracts, only the invoice date is often shown. The service period is missing — and with it, the booking reference for the recipient.

Incorrect or missing VAT breakdown: When invoicing services at different tax rates, these are sometimes combined into a single amount. This is not permitted under accounting rules.

Gaps in invoice numbering sequence: Jumps in invoice numbers raise questions with your accountant or SFTAX. Deleting an invoice from your system and reusing its number is also not allowed.

No statement for tax-exempt services: If you provide tax-exempt services (e.g. education, healthcare), note the reason for exemption on the invoice — for example "exempt from VAT under Article 21 VAT Act".

Use a Template Rather Than Building One Yourself

When building a template in Word or Excel yourself, experience shows you'll forget at least one field — or the formatting won't match QR-code requirements. The SnapBill app automatically includes all required fields and generates a legally compliant QR-bill in one step.

At a Glance

• 9 required fields: sender, recipient, date, invoice number, service description, net amount, VAT rate and amount, VAT number (if applicable), payment details.
• 2026 VAT rates: 8.1% (standard), 3.8% (accommodation), 2.6% (reduced: food, books).
• QR-bill: Standard for Swiss invoices since the orange payment slip was phased out.
• Corrections: Never delete an issued invoice — always correct via credit note.
• Optional fields: payment deadline, discount terms, service period and project number noticeably improve payment flow.