A money bill is a bill that solely concerns taxation or government spending, as opposed to changes in public law.

Examples by country

In some instances of the Westminster system, the upper house is not allowed to block money bills.

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

• In the Republic of Ireland, the Senate may not delay a money bill more than 21 days.

• 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).

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.