The German Electoral System: Constitutional Framework and Reform

The German electoral system is governed by Article 38 of the Grundgesetz, which guarantees the right to vote and to stand for election in secret, free, and equal elections. The electoral system for the Bundestag is a form of personalised proportional representation (personalisierte Verhältniswahl), combining elements of constituency-based majority voting with proportional allocation to ensure that the composition of parliament reflects the overall distribution of party votes. The system is regulated in detail by the Federal Electoral Act (Bundeswahlgesetz, BWahlG), which has been the subject of repeated constitutional challenges and reforms.

Constitutional Principles of Elections

Article 38(1) GG establishes five constitutional principles for Bundestag elections: they must be general (allgemein), direct (unmittelbar), free (frei), equal (gleich), and secret (geheim). The principle of general elections prohibits unjustified restrictions on the right to vote, requiring that all German citizens over eighteen years of age be entitled to vote and that all citizens who have attained the age of majority be eligible to stand for election. The principle of direct elections requires that voters cast their ballots directly for candidates and parties, without intermediaries. The principle of free elections prohibits state influence on electoral choices and requires fair access to the electoral process. The principle of equal elections requires that each vote carry the same weight, a requirement that the Federal Constitutional Court has applied strictly to the allocation of parliamentary seats. The principle of secret elections requires that the voter’s choice cannot be observed or subsequently determined.

The Two-Vote System

Each voter has two votes (zwei Stimmen). The first vote (Erststimme) is cast for a constituency candidate in one of 299 single-member constituencies. The candidate with a plurality of votes in the constituency is elected directly to the Bundestag (first-past-the-post). The second vote (Zweitstimme) is cast for a party list (Land list), determining the proportional distribution of seats among parties. The second vote is decisive for the overall composition of the Bundestag: parties receive seats in proportion to their share of second votes, subject to the five-per-cent threshold. The combination of first-vote constituency winners and second-vote proportional allocation creates the personalised element of the electoral system, ensuring that voters maintain a direct link with their local representative while the overall result reflects the national distribution of party preferences.

The Five-Per-Cent Threshold

Article 38 GG does not expressly provide for a threshold, but the Federal Constitutional Court has upheld the statutory five-per-cent clause (Fünf-Prozent-Klausel) in the Bundestagswahlgesetz as constitutionally permissible. The threshold is designed to prevent the fragmentation of the party system that characterised the Weimar Republic, ensuring that the Bundestag can function effectively with a manageable number of parties. The Court has upheld the threshold on condition that it is reviewed periodically to ensure it remains necessary and proportionate. The threshold does not apply to parties representing recognised national minorities under Article 6 of the Federal Electoral Act. The constitutionality of the five-per-cent threshold for European Parliament elections has been challenged, with the Federal Constitutional Court holding in 2011 and 2014 that a lower threshold (three per cent) was permissible, and subsequently in 2014 finding any threshold for European elections unconstitutional following the ECJ’s judgment in the Luxembourg case.

Overhang and Equalisation Seats

The German electoral system has historically produced overhang seats (Überhangmandate): when a party wins more constituency seats through first votes than its proportion of second votes would entitle it to, it retains those extra seats. The 2013 federal election produced four overhang seats for the CDU/CSU. To compensate other parties for the distortion caused by overhang seats, the electoral system was reformed in 2013 to provide for equalisation seats (Ausgleichsmandate), ensuring that the overall distribution of seats reflects the second-vote proportions exactly. The 2013 reform also increased the size of the Bundestag from the nominal 598 seats to over 700 seats in practice. The Federal Constitutional Court, in its Bundeswahlgesetz decisions of 2008 and 2012, required equalisation for overhang seats, holding that negative voting weight — the phenomenon where additional votes for a party could reduce its seat allocation — violated the principle of electoral equality.

Candidate Selection and Party Lists

Candidates for constituency seats are nominated by party conventions or through assemblies of party members. Party lists for the proportional allocation are drawn up by Land party conventions, with the order of candidates determining who is elected if the party receives list seats. The candidate selection process must comply with democratic principles under Article 21 GG, ensuring that members have the opportunity to participate in the selection of candidates. The Federal Constitutional Court has held that the procedures for candidate nomination must provide adequate transparency and member participation, rejecting the exclusion of party members from candidate selection.

Constitutional Review of Electoral Law

The Federal Constitutional Court exercises jurisdiction over election complaints under Article 41 GG, reviewing the validity of elections and the constitutionality of electoral legislation. The Court has developed extensive electoral law jurisprudence, striking down provisions that violate the principles of electoral equality, including the negative voting weight phenomenon and the unequal distribution of constituency boundaries. The Court has also reviewed the five-per-cent threshold for local and Land elections, applying a stricter standard where the threshold affects the composition of local councils. The Court’s rigorous review of electoral law reflects the central importance of democratic elections to the constitutional order and the protection of the right to vote as a fundamental constitutional right.