Annual Tax Returns in Germany (ESt/KSt/GewSt/USt): Filing Electronically

Anyone who runs a business must, regardless of legal form, file tax returns with the tax office every year, and they must be filed electronically, no longer on paper. Which returns are due in an individual case depends on whether the business is a sole proprietorship, a partnership or a corporation.

In brief: § 149 AO (the German Fiscal Code, Abgabenordnung) requires businesses to file their annual tax returns electronically: depending on legal form, income tax (Einkommensteuer) or corporate income tax (Körperschaftsteuer), usually together with trade tax (Gewerbesteuer) and VAT (Umsatzsteuer). For the 2025 assessment period, the deadline without tax advisory support ends on 31.07.2026, and with advisory support on 01.03.2027. Anyone who misses the deadline risks late-filing surcharges and coercive fines.

Who is affected?

In principle, every business is affected; which annual return must actually be prepared depends on the legal form. Sole proprietors and partnerships such as a GbR, OHG or KG file an income tax return, into which the business profits flow. Corporations such as a GmbH or a UG (haftungsbeschränkt), by contrast, prepare their own corporate income tax return, since they are treated for tax purposes as a separate legal entity. In addition, commercially active businesses file a trade tax return regardless of legal form, and as a rule a VAT return is also due. In practice, this means that most businesses file not just one but several annual returns in parallel. A tool such as Company Audit shows which of these obligations apply to your own business specifically.

What do you need to do in practice?

Timely filing can be broken down into a manageable sequence of steps that follows the calendar year:

1. Determine which annual returns are mandatory for your legal form (ESt vs. KSt, GewSt, USt).
2. Prepare receipts and the annual financial statements or cash-basis profit statement (EÜR) in good time for the return.
3. Submit the returns electronically (ELSTER or tax firm software).
4. Enter the filing deadline in your calendar (distinguishing with and without an advisor).
5. Check the tax assessments once received and observe the objection deadlines.

What matters above all is lead time: anyone who gathers receipts only shortly before the deadline easily comes under time pressure, especially when trade tax and VAT returns are due in addition to the income or corporate income tax return. Whether a simple cash-basis profit statement is sufficient or full annual financial statements are required in turn depends on the legal form and the bookkeeping obligation; this basis should therefore be settled early and not just before electronic submission.

By when and how often?

The annual tax returns are, as the name suggests, due once a year, and the specific deadlines depend on whether tax advisory support has been engaged. For the 2025 assessment period, the filing deadline without a tax advisor is 31.07.2026; with tax advisory support, the deadline moves to 01.03.2027. This considerable extension has a practical background: tax firms serve numerous clients at the same time and need correspondingly more time to prepare all returns properly and submit them electronically. Practical tip: anyone who has the return filed by a tax firm benefits from this longer deadline, which relieves the pressure above all at the start of the year, when many business deadlines coincide anyway.

What are the consequences of a violation?

Anyone who misses the filing deadline must expect late-filing surcharges under § 149 AO; if the return remains permanently outstanding, the tax office can additionally impose a coercive fine to force filing. It gets even worse if no return is filed at all: the tax office then estimates the tax base itself. In experience, such estimates tend to work to the business's disadvantage, as the tax office has no favorable details such as individual business expenses. It is therefore always worth filing your own return on time, yourself or through a tax firm, rather than leaving it to an estimate by the tax office. Anyone who realizes that the deadline cannot be met despite careful preparation should clarify this early with the competent tax office or the tax firm engaged, rather than quietly postponing the filing.

Frequently asked questions

Do I have to file an income tax return or a corporate income tax return?

That depends on the legal form: sole proprietorships and partnerships file an income tax return, in which the business profits are taxed at the level of the participating individuals. Corporations such as a GmbH file their own corporate income tax return instead.

Are trade tax and VAT returns also required?

Yes, depending on the activity: commercially active businesses additionally file a trade tax return, and as a rule a VAT return is also due, regardless of whether income tax or corporate income tax applies. For most businesses, this means in practice that not just one but several returns have to be prepared in parallel at the end of the year.

Which deadline applies to the 2025 assessment period?

Without tax advisory support, the deadline ends on 31.07.2026; with tax advisory support, it is extended to 01.03.2027.

How must the returns be filed?

Electronically, for example via ELSTER or tax firm software; paper filing does not satisfy the obligation under § 149 AO. After submission, the incoming tax assessments should be checked carefully so that any objection deadlines do not lapse.

What happens if the return is missing altogether?

The tax office then estimates the tax base; this estimate is regularly unfavorable, in addition to the late-filing surcharges and coercive fines that may apply.

Source: § 149 AO. This article is general information and does not replace legal advice in individual cases. As of: July 2026.