In the Westminster system

Westminster System

The Westminster system is a democratic parliamentary system of government modelled after the politics of the United Kingdom. This term comes from the Palace of Westminster, the seat of the Parliament of the United Kingdom....

 (and, colloquially, in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

), a money bill or supply bill is a bill

Bill (proposed law)

A bill is a proposed law under consideration by a legislature. A bill does not become law until it is passed by the legislature and, in most cases, approved by the executive. Once a bill has been enacted into law, it is called an act or a statute....

 that solely concerns taxation or government spending

Government spending

Government spending includes all government consumption, investment but excludes transfer payments made by a state. Government acquisition of goods and services for current use to directly satisfy individual or collective needs of the members of the community is classed as government final...

 (also known as appropriation

Appropriation (law)

In law and government, appropriation is the act of setting apart something for its application to a particular usage, to the exclusion of all other uses....

 of money), as opposed to changes in public law.
It is often a constitutional convention

Constitutional convention (political custom)

A constitutional convention is an informal and uncodified procedural agreement that is followed by the institutions of a state. In some states, notably those Commonwealth of Nations states that follow the Westminster system and whose political systems derive from British constitutional law, most...

 that the upper house

Upper house

An upper house, often called a senate, is one of two chambers of a bicameral legislature, the other chamber being the lower house; a legislature composed of only one house is described as unicameral.- Possible specific characteristics :...

 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

Loss of Supply

Loss of supply occurs where a government in a parliamentary democracy using the Westminster System or a system derived from it is denied a supply of treasury or exchequer funds, by whichever house or houses of parliament or head of state is constitutionally entitled to grant and deny supply. A...

 in the lower house

Lower house

A lower house is one of two chambers of a bicameral legislature, the other chamber being the upper house.Despite its official position "below" the upper house, in many legislatures worldwide the lower house has come to wield more power...

 is conventionally considered to be an expression of the house's loss of confidence

Motion of no confidence

A motion of no confidence is a parliamentary motion whose passing would demonstrate to the head of state that the elected parliament no longer has confidence in the appointed government.-Overview:Typically, when a parliament passes a vote of no...

 in the government resulting in the government's fall.
Procedure for a Money Bill:

1. Money Bills can be introduced only in Lok Sabha
   Lok Sabha
   The Lok Sabha or House of the People is the lower house of the Parliament of India. Members of the Lok Sabha are elected by direct election under universal adult suffrage. As of 2009, there have been fifteen Lok Sabhas elected by the people of India...
   
    (the directly elected 'people's house' of the Indian Parliament).
2. Money bills passed by the Lok Sabha are sent to the Rajya Sabha
   Rajya Sabha
   The Rajya Sabha or Council of States is the upper house of the Parliament of India. Rajya means "state," and Sabha means "assembly hall" in Sanskrit. Membership is limited to 250 members, 12 of whom are chosen by the President of India for their expertise in specific fields of art, literature,...
   
    (the upper house of parliament, elected by the state and territorial legislatures or appointed by the president
   President of India
   The President of India is the head of state and first citizen of India, as well as the Supreme Commander of the Indian Armed Forces. President of India is also the formal head of all the three branches of Indian Democracy - Legislature, Executive and Judiciary...
   
   ).