General elections occur whenever parliament is dissolved by the governor general on the monarch's behalf.
The timing of the dissolution has historically been chosen by the prime minister.
The Constitution Act, 1867, provides that a parliament last no longer than five years.
Canadian election law requires that elections must be held on the third Monday in October in the fourth year after the last election, subject to the discretion of the Crown.
Campaigns must be at least 36 days long.
Candidates are usually nominated by political parties.
A candidate can run independently, although it is rare for such a candidate to win.
Most successful independent candidates have been incumbents who were expelled from their political parties (for example, John Nunziata in 1997, André Arthur in 2006 or Jody Wilson-Raybould in 2019) or who failed to win their parties' nomination (for example, Chuck Cadman in 2004).
Most Canadian candidates are chosen in meetings called by their party's local association.
In practice, the candidate who signs up the most local party members generally wins the nomination.

To run for a seat in the house, candidates must file nomination papers bearing the signatures of at least 50 or 100 constituents (depending on the size of the electoral district).
Each electoral district returns one member using the first-past-the-post electoral system, under which the candidate with a plurality of votes wins.
To vote, one must be a citizen of Canada and at least eighteen years of age.
Declining the ballot, which is possible in several provinces, is not an option under current federal regulations.

Once elected, a member of Parliament normally continues to serve until the next dissolution of parliament.
If a member dies, resigns, or ceases to be qualified, his or her seat falls vacant.
It is also possible for the House of Commons to expel a member, but this power is only exercised when the member has engaged in serious misconduct or criminal activity.
Formerly, MPs appointed to the cabinet were expected to resign their seats, though this practice ceased in 1931.
In each case, a vacancy may be filled by a by-election in the appropriate electoral district.
The first-past-the-post system is used in by-elections, as in general elections.
General elections occur whenever parliament is dissolved by the governor general on the monarch's behalf. The timing of the dissolution has historically been chosen by the prime minister. The Constitution Act, 1867, provides that a parliament last no longer than five years. Canadian election law requires that elections must be held on the third Monday in October in the fourth year after the last election, subject to the discretion of the Crown. Campaigns must be at least 36 days long. Candidates are usually nominated by political parties. A candidate can run independently, although it is rare for such a candidate to win. Most successful independent candidates have been incumbents who were expelled from their political parties (for example, John Nunziata in 1997, André Arthur in 2006 or Jody Wilson-Raybould in 2019) or who failed to win their parties' nomination (for example, Chuck Cadman in 2004). Most Canadian candidates are chosen in meetings called by their party's local association. In practice, the candidate who signs up the most local party members generally wins the nomination.
To run for a seat in the house, candidates must file nomination papers bearing the signatures of at least 50 or 100 constituents (depending on the size of the electoral district). Each electoral district returns one member using the first-past-the-post electoral system, under which the candidate with a plurality of votes wins. To vote, one must be a citizen of Canada and at least eighteen years of age. Declining the ballot, which is possible in several provinces, is not an option under current federal regulations.
Once elected, a member of Parliament normally continues to serve until the next dissolution of parliament. If a member dies, resigns, or ceases to be qualified, his or her seat falls vacant. It is also possible for the House of Commons to expel a member, but this power is only exercised when the member has engaged in serious misconduct or criminal activity. Formerly, MPs appointed to the cabinet were expected to resign their seats, though this practice ceased in 1931. In each case, a vacancy may be filled by a by-election in the appropriate electoral district. The first-past-the-post system is used in by-elections, as in general elections.
House of Commons of Canada