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Field help: Profit determination period

Enter the time period (short business year = Rumpfwirtschaftsjahr) to which the revenue surplus statement refers.

The period for determining profits is normally the business year. The business year basically covers a period of 12 months and generally corresponds to the calendar year. For small entrepreneurs and freelancers this is always the case (sect. 4a Income Tax Act (EStG)).

A different business year is when the business year as the profit determination period is not the same as the calendar year.

  • Farmers and foresters always have a different business year, in principle from 1 July to 30 June of the following year (sect. 4a para. 1 no. 1 Income Tax Act (EStG) and sect. 8c Income Tax Ordinance (EStDV)).
  • For traders, the business year differs from the calendar year only in exceptional cases: Tradesmen who are registered in the commercial register may, in agreement with the tax office, change the business year to a period that differs from the calendar year (section 4a, paragraph 1, no. 2 Income Tax Act (EStG)).

Only under certain conditions may the business year cover a period of less than twelve months. This is referred to as a short business year (sect. 8b para. 1 Income Tax Ordinance (EStDV)). This is possible if

  • a business is opened, acquired, abandoned or sold, or
  • a taxpayer changes from regular trades on one particular day to regular trades on another particular day.

In general, this change may only be made with the agreement of the tax office.

Finanztip

"Die Programme überzeugten mit einem großen Leistungsumfang, einer exakten Berechnung und allen Zusatzfunktionen. Auch Ehepaare sind hier gut aufgehoben."

Finanztip 04/2026

WirtschaftsWoche

"Der Pionier für Online-Steuererklärungen bietet Nutzern nun zusätzlich einen Import ihres digitalen Steuerbescheids und prüft auch die dort enthaltenen Daten automatisch auf Optimierungspotenzial."

WirtschaftsWoche 16/2026

Chip

"Neben einer KI-gestützten Steuerhilfe sind die Bescheidprüfung und eine effizientere digitale Kommunikation mit dem Finanzamt hinzugekommen. [...] Neben Lohnsteuerbescheinigungen kann der Cloud-Dienst nun auch Rechnungen erkennen und verarbeiten."

Chip 04/2026