Private Member's Bill

A Private Member's Bill (PMB) is a piece of proposed legislation introduced by a legislator who is not a minister or member of the executive cabinet. The term is most associated with Westminster-style parliaments — the United Kingdom, Canada, India, Australia, New Zealand, Ireland, and South Africa — though similar instruments exist in other systems under different names.

PMBs allow backbench MPs and opposition members to put issues onto the legislative agenda that the government may have ignored or avoided. They are distinct from Government Bills, which are introduced by ministers and typically carry the backing of the executive and its parliamentary majority.

The mechanics vary by jurisdiction:

• In the UK House of Commons, PMBs can be introduced via the annual ballot, the Ten Minute Rule, or Presentation. Ballot bills get priority on designated Fridays.
• In Canada, MPs and Senators may introduce PMBs, but those involving the spending of public money require a royal recommendation from the Crown, sharply limiting their scope.
• In India, Fridays in Parliament are traditionally reserved for private members' business, though sittings are often curtailed.

Historically, very few PMBs become law. In the UK, landmark social reforms have nonetheless passed this way, including the Abortion Act 1967 (introduced by David Steel) and the Murder (Abolition of Death Penalty) Act 1965 (introduced by Sydney Silverman). In Canada, only a small fraction of PMBs receive royal assent in any given Parliament.

Even when they fail, PMBs serve important functions: signalling constituency priorities, forcing parliamentary debate on sensitive topics (assisted dying, electoral reform, animal welfare), and pressuring the government to adopt the measure as its own. They are a key mechanism by which individual legislators, rather than party machinery, shape the legislative record.