Money bill

In the Westminster system, a money bill or supply bill is a bill that solely concerns taxation or government spending (also known as appropriation of money), as opposed to changes in public law.

Conventions

It is often a constitutional convention that the upper house may not block supply. There is often another requirement that non-money bill type clauses may not be attached to a money bill.

Loss of supply in the lower house is conventially considered to be an expression of the house's loss of confidence in the government resulting in the government's fall.

Examples by country

Australia

In Australia, the Senate may not originate or amend a money bill, though it may refuse to pass it (which leads to a deadlock as happened in 1975).

India

Procedure for a Money Bill:

Money Bills can be introduced only in Lok Sabha (the directly elected 'people's house' of the Indian Parliament).
Money bills passed by the Lok Sabha are sent to the Rajya Sabha (the upper house of parliament, elected by the state and territorial legislatures or appointed by the president). The Rajya Sabha may not amend money bills but can recommend amendments. A money bill must be returned to the Lok Sabha within 14 days or the bill is deemed to have passed both houses in the form it was originally passed by the Lok Sabha.
When a Money Bill is returned to the Lok Sabha with the recommended amendments of the Rajya Sabha it is open to Lok Sabha to accept or reject any or all of the recommendations.
A money bill is deemed to have passed both houses with any recommended amendments the Lok Sabha chooses to accept, (and without any that it chooses to decline).

Republic of Ireland

In the Republic of Ireland, the Senate may not delay a money bill more than 21 days. The President of Ireland may not refuse to sign a money bill and may not refer such a bill to the Supreme Court to test its constitutionality.

United Kingdom

In the United Kingdom, the Parliament Act provides that the House of Lords may not delay a money bill more than a month.