German Corporate Tax Law

Körperschaftsteuer: Corporate Income Tax

German corporations — including the Aktiengesellschaft (AG), Gesellschaft mit beschränkter Haftung (GmbH), and Europäische Gesellschaft (SE) — are subject to corporate income tax (Körperschaftsteuer) under the Körperschaftsteuergesetz (KStG). The standard corporate tax rate is 15 percent on taxable income, irrespective of whether the income is retained or distributed. This rate, combined with the solidarity surcharge (Solidaritätszuschlag, 5.5 percent of the corporate tax, yielding an effective 0.825 percent surcharge) and the trade tax (Gewerbesteuer), produces a combined effective tax rate averaging approximately 30 percent nationally, though the exact rate depends on the municipal trade tax multiplier (Hebesatz). The KStG adopts a classical corporate tax system: the corporation is a separate taxpayer, and dividends paid to shareholders are subject to further taxation — at the shareholder level, individuals are subject to the Abgeltungsteuer of 25 percent on dividends, while corporate shareholders benefit from a 95 percent exemption under the participation exemption (Schachtelprivileg, § 8b KStG). The Federal Constitutional Court has consistently upheld the classical system against constitutional challenges, and the 2001 corporate tax reform (Unternehmensteuerreform 2001) shifted from the imputation system (Anrechnungsverfahren) to the classical system in response to EU law requirements. The Zinsschranke (interest limitation rule, § 4h EStG and § 8a KStG) limits the deductibility of net interest expenses to 30 percent of EBITDA, transposing the EU Anti-Tax Avoidance Directive (ATAD).

Trade Tax (Gewerbesteuer)

The Gewerbesteuer (trade tax) is a municipal tax on commercial enterprises (Gewerbebetriebe) governed by the Gewerbesteuergesetz (GewStG). It is the most significant source of revenue for municipalities and was described by the Federal Constitutional Court as the “backbone” of municipal finance. The tax is levied on trade income (Gewerbeertrag), which is the corporation’s or partnership’s income from commercial activity as calculated for corporate income tax purposes, adjusted by certain additions (Hinzurechnungen, including 25 percent of interest payments, 20 percent of rental payments, and 25 percent of royalties) and deductions (Kürzungen, including 1.2 percent of the unitary value of real property). The tax rate is the product of the basic rate (Steuermesszahl, 3.5 percent) and the municipal collection multiplier (Hebesatz), which varies by municipality — typically between 200 and 500 percent, with large cities such as Munich, Hamburg, and Frankfurt applying multipliers of 400 to 490 percent. The effective trade tax rate thus ranges from 7 percent to 17.5 percent. The trade tax has been criticised for its complexity and the disincentive effects of the add-back provisions, but numerous reform attempts have failed due to municipal fiscal interests. Partnerships (such as GmbH & Co. KG) are subject to trade tax at the entity level, with a notional credit for individual partners.

Tax Groups (Organschaft)

The Organschaft (tax group) is a distinctive feature of German corporate tax law that permits a parent corporation and its subsidiaries to be treated as a single taxpayer for corporate income tax and trade tax purposes under §§ 14–19 KStG and §§ 2–7 GewStG. The requirements are: the parent must hold a majority of voting rights in the subsidiary; there must be a profit and loss pooling agreement (Ergebnisabführungsvertrag, EAV) concluded for a minimum of five years and registered in the commercial register; and the parent must have its management and registered office in Germany. The EAV requires that the subsidiary transfer its entire profit to the parent and that the parent assume any losses. Within the Organschaft, the subsidiary’s income is attributed to the parent, and the parent files a single consolidated tax return. The Organschaft eliminates the 5 percent non-deductible portion of dividend exemption under § 8b KStG on intra-group dividends and facilitates loss offsetting within the group. The Federal Fiscal Court (Bundesfinanzhof, BFH) has developed extensive case law on Organschaft, including the requirement that the EAV be effectively implemented — mere contractual agreement is insufficient if profit transfers are not actually made. The EU law compatibility of the Organschaft — which in practice excludes cross-border groups — has been the subject of numerous references to the Court of Justice of the European Union (CJEU).

Cross-Border Taxation and Double Tax Treaties

Germany has one of the densest networks of double taxation treaties (Doppelbesteuerungsabkommen, DBAs), with more than 90 treaties in force, largely following the OECD Model Tax Convention. The Außensteuergesetz (AStG) contains defensive measures against tax avoidance in cross-border situations, including rules on transfer pricing, CFC (controlled foreign company) rules, and the exit tax (Wegzugsbesteuerung). The CFC rules under §§ 7–14 AStG attribute passive income of a controlled foreign corporation to its German resident shareholders if the foreign corporation is subject to low taxation (less than 25 percent effective tax rate) and is controlled by German residents. The rules were substantially tightened in 2022 in response to the ATAD and the OECD’s Base Erosion and Profit Shifting (BEPS) project. The exit tax (§ 6 AStG and § 2(3) AStG) imposes a deemed realisation of unrealised gains when a taxpayer transfers assets or residence out of Germany, with the tax payable in seven annual instalments. The Federal Constitutional Court upheld the constitutionality of the exit tax in BVerfGE 154, 174, subject to the requirement of deferral without interest where the taxpayer can demonstrate inability to pay.

Withholding Tax and CFC Rules

Germany imposes withholding tax on certain cross-border payments: dividends are subject to 25 percent withholding tax (§ 43 EStG), which may be reduced under tax treaties; interest is generally exempt from withholding under the EU Interest and Royalties Directive (2003/49/EC) and German domestic law; and royalties are subject to 15 percent withholding tax (§ 50a EStG). The reduced withholding tax rates under DBAs often require the beneficiary to hold a minimum participation (typically 5 or 10 percent of the capital) to qualify. The EU Anti-Tax Avoidance Directive (ATAD I and II) has been transposed into German law through amendments to the KStG, EStG, and AStG, introducing a uniform earnings stripping rule (the Zinsschranke), a CFC rule aligned with EU requirements, and a general anti-abuse rule (§ 42 AO — the Abgabenordnung, German Fiscal Code), which allows the tax authorities to disregard artificial arrangements whose principal purpose is to obtain a tax advantage. The BFH has applied § 42 AO in landmark cases including the Gestaltungsmissbrauch decisions, holding that a structure is abusive if it lacks economic substance and the sole or predominant purpose is tax avoidance. The Bundesministerium der Finanzen (BMF) publishes administrative guidance on the application of anti-abuse rules, which, while not binding on the courts, is followed by the tax authorities in practice.