Rechnungsdatum vs Service Date vs Fälligkeitsdatum

The invoice date is the date an invoice is issued to a Kunde. It gives both parties a reference point for their records and may be used with the agreed Zahlungsbedingungen to determine a Fälligkeitsdatum. Its importance and any required timing can depend on jurisdiction and transaction.

Invoice date vs service date

The service date describes when work was performed or a supply took place. The invoice date records when the billing document was issued. Those dates can be the same, but they do not have to be. If the distinction helps the Kunde understand the charge, show a separate service period or supply date rather than changing the Ausstellungsdatum to imply the invoice was sent earlier.

Invoice date vs Fälligkeitsdatum

The Fälligkeitsdatum is when payment is expected under the agreed terms. For example, an invoice issued on 7. Oktober 2026 with Net 30 terms has a calendar-day Fälligkeitsdatum of 6 November 2026 if the term is counted from the Ausstellungsdatum. The agreement or local rules may define a different starting point; write the actual date clearly when possible. Use the invoice due-date calculator for date arithmetic.

Why the Ausstellungsdatum matters

• It lets the Kunde identify the billing period and document version.
• It is commonly used with Zahlungsbedingungen to communicate when payment is expected.
• It helps connect a payment or reminder to the correct invoice record.
• In some tax and reporting contexts, dates can have specific effects; consult official guidance for your jurisdiction rather than relying on a generic guide.

Practical example

A consultant performs work on 30 September and issues the invoice on 7 October. The invoice can show an Ausstellungsdatum of 7 October and a service period ending 30 September. If the agreed term is Net 14 from issue, show the resulting Fälligkeitsdatum or term unambiguously.

For a clear billing document, include the Ausstellungsdatum alongside the Rechnungsnummer, service details and Fälligkeitsdatum.

Problems this guide helps you solve

• Choosing the right document for the current stage of the deal (proposal, bill or payment record).
• Avoiding vague descriptions, missing dates or unclear payment instructions that delay settlement.
• Keeping numbers, statuses and follow-ups aligned with what actually happened—not assumptions.

Decision checklist

1. Confirm the agreement stage: proposal, accepted work, billing or payment received.
2. Verify parties, currency, references (PO/project) and unique document numbers.
3. Make the amount due and the next Kunde action obvious.
4. Save a copy and record how the document was delivered or how payment was matched.

Common mistakes

• Sending a proposal labelled as an invoice before billing is appropriate.
• Reusing document numbers or leaving critical dates blank.
• Marking something paid before funds are confirmed in your records.
• Omitting payment instructions or using a Fälligkeitsdatum that conflicts with written terms.

Next steps

Draft or adjust the document in the free Rechnungsgenerator, then review related guides linked on this page. Requirements can vary by jurisdiction—confirm what applies to your situation.