Every entry below is the rule as Germany publishes it. It is a reference, not a calendar: where a deadline runs from something only you know, this page says so instead of showing a date.
This is the rule as published by the registry, checked against the primary source on the date shown. It is not your filing date. Where a deadline runs from incorporation, from a fiscal year the company itself elects, or from an event only you know about, no date can be derived here at all — the figure you see is the formula, not the answer. Extensions, transitional regimes and entity-specific exemptions are not reflected. Confirm with the registry before you rely on a date.
The German Geschäftsjahr is not a statutory constant: it is fixed in the company's articles and need not be the calendar year, so the financial year end is a value the user must supply. The decisive point for this jurisdiction is that only ONE of the obligations below runs off that date. The disclosure deadline is counted from the Abschlussstichtag — the Bundesamt für Justiz writes: «Die Einreichungsfrist beträgt höchstens ein Jahr. Sie wird vom Abschlussstichtag des Geschäftsjahrs an berechnet.» All three tax returns run off the CALENDAR year instead, because the Veranlagungszeitraum for corporate income tax, the Erhebungszeitraum for trade tax and the Besteuerungszeitraum for VAT are the calendar year regardless of the accounting period: ELSTER states «Die Abgabefrist für die Körperschaftsteuererklärung 2025 läuft bis zum 31.07.2026» as a flat date, and names one narrow exception (income from agriculture and forestry with a Wirtschaftsjahr ending after 28.02.2026 — then the end of the ninth month after the Wirtschaftsjahr end). The VAT return periods are calendar months or calendar quarters and ignore the financial year entirely. Two provisions that would settle the tax side textually were NOT read for this record: § 7 Abs. 4 KStG (deviating Wirtschaftsjahr for corporations) and § 14 GewStG, because gesetze-im-internet.de refuses machine access.