A one-month official campaign period precedes general elections. The voting age is 18. Preliminary results are available within hours of poll closings. Seats in parliament are allocated both by vote and by voter turnout. The votes for parties who did not receive a minimum threshold of votes are redistributed to other parties proportionate to their own share of the vote. The lists of newly elected members of parliament are announced 7 days after the elections. The president must convene the new parliament within one month after the elections, and calls upon parties, coalitions, or political groups to nominate a prime minister and form a government. If the three largest parties, coalitions, or political groups fail to nominate a prime minister, the president can dissolve parliament and schedule new elections. In recent years, it has taken approximately a month for the new government to form.

A general election in Bulgaria was held June 25, 2005. Results are as follows: Coalition for Bulgaria (CfB) 31.1%, National Movement Simeon II (NMSS) 19.9%, Movement for Rights and Freedom (MRF) 12.7%, Ataka 8.2%, United Democratic Forces (UDF) 7.7%, Democrats for Strong Bulgaria (DSB) 6.5%, Bulgarian People's Union (BPU) 5.2%.

In May 2007, Bulgaria held its first elections for members of the European Parliament. The GERB (Citizens for European Development of Bulgaria) party, led by Sofia Mayor Boyko Borisov, won the vote by a narrow margin over the Socialists (BSP) and secured 5 out of 18 seats. The BSP won 5 seats, the MRF won 4 seats, Ataka won 3 seats, and Simeon Saxe-Coburg Gotha's NMSS won 1 seat.

The president of Bulgaria is directly elected for a 5-year term with the right to one re-election. The president serves as the head of state and commander in chief of the armed forces. The president is the head of the Consultative Council for National Security and while unable to initiate legislation, the president can return a bill for further debate. Parliament can overturn the president's veto with a simple majority vote. Bulgarian Socialist Party candidate Georgi Parvanov won the November 2001 presidential election and was re-elected in October 2006 as an independent candidate in a run-off against Volen Siderov, the leader of extreme nationalist Ataka Party.

The prime minister is head of the Council of Ministers, which is the primary component of the executive branch. In addition to the prime minister and deputy prime ministers, the Council is composed of ministers who head the various agencies within the government and usually come from the majority/ruling party or from a member party of the ruling coalition in parliament. The Council is responsible for carrying out state policy, managing the state budget and maintaining law and order. The Council must resign if the National Assembly passes a vote of no confidence in the Council or prime minister.

The Bulgarian judicial system became an independent branch of the government following passage of the 1991 constitution. Reform within this branch has been slow with political influence, widespread corruption, and long delays continuously plaguing the system. In 1994, the National Assembly passed the Judicial Powers Act to further delineate the role of the judiciary. In 2003, Bulgaria adopted amendments to the constitution, which aimed to improve the effectiveness of the judicial system by limiting magistrates' irremovability and immunity against criminal prosecution.

The trial, appellate, and cassation (highest appellate) courts comprise the three tiers of the judicial system. Military courts (at trial and appeal level) handle cases involving military and Ministry of Interior personnel. Administrative courts, effective since March 2007, specialize in reviewing appeals of government acts.

The Supreme Administrative Court and the Supreme Court of Cassation are the highest courts of appeal and determine the application of all laws.

The Supreme Judicial Council (SJC), which manages the judiciary and is responsible for appointing magistrates, is composed of 25 members serving 5-year terms. Those who serve on the council are experienced legal professionals and are either appointed by the National Assembly, selected by the judicial system, or serve on the SJC as a result of their position in government. In 2007 parliament revised the Judicial Powers Act to make it compliant with the latest constitutional amendments, which provided for the establishment of the Inspectorate with the Supreme Judicial Council: a standing body with 11 members who investigate complaints of magistrates' misconduct, with no right to rule on the substance of judicial acts.

The Constitutional Court, which is separate from the rest of the judiciary, interprets the constitution and constitutionality of laws and treaties. Its 12 justices serve 9-year terms and are selected by the president, the National Assembly, and the Supreme Courts.