The Financial Constitution: Taxation, Equalisation, and the Debt Brake

The financial constitution (Finanzverfassung) of Germany is governed by Articles 104a to 115 of the Grundgesetz, establishing the framework for taxation, fiscal allocation, and public borrowing. These provisions distribute tax revenues between the federation and the Länder, regulate the fiscal equalisation system, and impose limits on public debt. The financial constitution reflects the federal structure of the German state, balancing the fiscal autonomy of the Länder with the need for fiscal coordination and solidarity across the federation.

Tax Allocation and Distribution

The German tax system is characterised by the shared tax system (Verbundsteuersystem), under which the most significant tax revenues are jointly allocated to the federation, the Länder, and the municipalities. Income tax (Einkommensteuer) is divided between the federation (42.5 per cent), the Länder (42.5 per cent), and the municipalities (15 per cent, through the trade tax apportionment). Corporation tax (Körperschaftsteuer) is divided equally between the federation and the Länder. Value-added tax (Umsatzsteuer, VAT) is divided between the federation, the Länder, and the municipalities according to a statutory ratio that may be adjusted to reflect changing fiscal needs. Trade tax (Gewerbesteuer) accrues primarily to the municipalities. The federation receives the proceeds of excise duties (including the energy tax, tobacco tax, and coffee tax) and the solidarity surcharge (Solidaritätszuschlag), while the Länder receive the proceeds of inheritance tax, real property transfer tax, and betting and lottery taxes. The constitutional allocation of tax revenues under Article 106 GG has been the subject of extensive litigation, with the Federal Constitutional Court defining the principles for the distribution of shared taxes.

Fiscal Equalisation

The Länder Financial Equalisation (Länderfinanzausgleich) is governed by Articles 107 and 72(2) GG, designed to reduce disparities in fiscal capacity among the Länder and to ensure equivalent living conditions throughout Germany. The equalisation system operates through a multi-stage process. First, the horizontal distribution of VAT revenue gives financially weak Länder a proportionally larger share. Second, the Länder financial equalisation scheme transfers funds from financially strong Länder (currently Bavaria, Baden-Württemberg, Hesse, and Hamburg) to financially weak Länder (primarily the city-states Berlin and Bremen, and the eastern Länder). Third, the federation provides federal supplementary grants (Bundesergänzungszuweisungen) to cover special needs, including the costs of political leadership and the burdens of structural unemployment. The 2017 reform, effective from 2020, replaced the previous equalisation system with a simplified model that caps the total volume of equalisation payments and reduces the number of recipient Länder. The Federal Constitutional Court has consistently upheld the constitutionality of the financial equalisation system, requiring only that it respect the fiscal autonomy of the Länder and that it not reduce donor Länder to the level of recipients.

The Debt Brake

Article 109(3) GG, introduced in 2009 as part of the Föderalismusreform II, establishes the debt brake (Schuldenbremse), a constitutional limit on public borrowing. The federation may incur a structural budget deficit of no more than 0.35 per cent of GDP, calculated over the economic cycle to allow for cyclical fluctuations. The Länder are prohibited from incurring any structural budget deficit from 2020 onwards, although exceptions are permitted for natural disasters and severe recessions through a majority vote of the Bundestag or Land parliament. The debt brake is implemented through Article 115 GG, which requires the federation to account for cyclical effects and to establish a control account (Kontrollkonto) that tracks deviations from the structural deficit limit. The constitutional debt brake has been subject to significant strain during the COVID-19 pandemic and the energy crisis of 2022–2023, with the Bundestag suspending the debt brake for 2020–2023 and the Federal Constitutional Court issuing important rulings on the scope of emergency borrowing in the Nachtragshaushalt decision of 2023.

Budgetary Principles

Articles 110–114 GG establish the framework for federal budgeting. The budget (Haushaltsplan) must be enacted by statute before the beginning of each fiscal year, containing all revenues and expenditures of the federation. The budget must be balanced in accordance with the constitutional requirements. The Federal Court of Auditors (Bundesrechnungshof), established under Article 114 GG, audits the accounts and examines the economy, efficiency, and legality of federal budget management. The Bundesrechnungshof reports directly to the Bundestag and the Bundesrat, ensuring independent oversight of public finances. The Federal Constitutional Court has held that the budgetary autonomy of the Bundestag is a core element of the democratic principle, protected against encroachment by the executive and by European integration.

Financial Administration and Oversight

The financial constitution allocates responsibility for tax administration between the federation and the Länder. Customs duties, federal excise taxes, and the VAT on imports are administered by federal financial authorities (Bundesfinanzverwaltung). All other taxes are administered by the Land financial authorities (Landesfinanzverwaltungen) under federal supervision, ensuring uniform tax assessment and collection across Germany. The Federal Ministry of Finance exercises legal and specialised supervision over Land tax administration. The constitutional allocation of tax administration reflects the principle that the administration of taxes should, where possible, be integrated with the administration of public services to ensure efficiency and accountability.

European Constraints

The German financial constitution operates within the framework of European fiscal coordination, including the Stability and Growth Pact, the Fiscal Compact, and the European Stability Mechanism. The Federal Constitutional Court has reviewed the compatibility of European fiscal arrangements with the German constitutional order, holding in the ESM and Fiscal Compact decisions that the budgetary autonomy of the Bundestag must be preserved and that German participation in European fiscal mechanisms is subject to the limits of the financial constitution. The interplay between national fiscal rules and European constraints has created a complex legal framework that is likely to remain a focus of constitutional litigation.