Deposit Invoice Switzerland: Take an upfront payment cleanly

The client said yes. The project is moving. But before you block out weeks of work, buy materials, or start incurring costs, you want part of the budget secured.

That is exactly where a deposit invoice helps. In Switzerland, it gives you a clean way to request an advance payment, document it properly, and then deduct it clearly from the final invoice later on.

The important part is this: a deposit invoice should not feel like an improvised email with bank details. It should connect back to the quote or project, show a clear amount, follow your VAT logic if you are VAT-registered, and make the final reconciliation obvious for both the client and your bookkeeping.

This page blends the formal Swiss invoicing basics with the practical deposit-handling patterns that consistently show up in strong German, French, Italian, and English guidance on the topic.

The practical rule:
Use a deposit invoice when the client has confirmed the work, but you do not want to invoice the entire project upfront.

Typical Swiss use cases:

• projects that run over several weeks or months
• work that requires advance purchases or third-party costs
• bookings where your time or production slot must be reserved
• larger first-time client engagements where you want to reduce payment risk

What stands out across German, French, Italian, and English content on this topic is the same core framing: the document is mainly a cash-flow and risk-control tool. The language changes, but the workflow stays the same:

• German: Akontorechnung
• French: facture d'acompte
• Italian: fattura di acconto
• English: deposit invoice

How to write the final invoice properly

The most common mistake does not happen on the deposit invoice itself. It happens on the closing invoice.

A strong final invoice should show:

1. the total project amount
2. the deposit invoice already issued
3. the amount already paid
4. the remaining balance due

Simple structure:

Project total                               CHF 4,000.00
less deposit invoice INV-2026-014           CHF 1,200.00
Balance due                                 CHF 2,800.00

If you are VAT-registered, keep the VAT treatment consistent between the deposit and the final invoice. The main goal is that the client and your bookkeeping can both see exactly what was already billed and collected.