National Income Accounting: Definitive Guide for Beginners’ with Examples

national income accounting

National income is a common word to the economist. National income accounting gives information about the economic activity of a nation, using formula and its identity. It can also provide information for measuring the national income of a nation.

National income accounting is not an exact science. However, it gives beneficial insight into how well an economy is working, and where they generate and spend money. In combination with information concerning the associated population, data concerning the growth and per capita income over a given time can be examined.

National income accounting helps to calculate some metrics including the gross domestic product (GDP), gross national product(GNP), and the gross national income (GNI). At the domestic level, they use the GDP especially commonly for economic analysis. It represents the overall market value of the goods and services produced within a particular country over a given time period.

In order to understand the concept of national income accounting, let’s know what national income entails.


National income is the overall value of the final output of all new goods and services that a country produces within a given period.

Since the 1940s, the UK government has gathered explicit records of national income. However, the collection of basic data dates back to the 17th Century. It is comparatively used to measure the value-adding activities in the economy – products or services. In other words, it must create a genuine addition to the ‘value’ of the scarce resources.  

A simple way to understand this is to consider what happens when you produce and sell goods. Manufacturing of products typically occurs in stages. Raw materials are converted to finished or intermediate products at one stage and eventually sold out. At each intermediate stage, it adds in value, and then the product gets a selling price at the final stage. This selling price, the final output, reflects the value-added in form of all resources used in the various stages of production. This value is used for measuring national income. It is the value of all the final output of goods and services produced in a country within a year.

 It is an uncertain term and often they use it interchangeably with the national dividend, national output, as well as national expenditure. 

The progress of a country can be determined by the growth of the national income of that country.


National income accounting is a term that refers to measuring the overall state of an economy. This includes the health of the economy, the economic activity, the growth and development of that economy during a given period of time. Simply put, national income accounting measures the aggregate output as well as the aggregate income in an economy.

The accounting data gives us an insight into how the economy is faring. It tells where money is being generated and spent. Thus, we can determine the standard of living of a country using national income accounting figures.

It is an important system that the government of a country uses to evaluate the country’s level of economic activities within a given period of time. The tools they use for evaluation include data concerning the total revenues generated by local organizations; wages paid to workers, both foreign and domestic. Also, it includes the total money spent on income taxes and sales by persons and organizations residing in that country. 

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The most widely used measure of national income is gross domestic product (GDP). It’s the value of expenditures on final goods and services at market prices produced by domestic factors of production in a year. It is also the market value of these domestic factors entering into the production of final goods and services.

“Gross” means that no deduction for the decrease in the stock of plant and equipment due to wear and tear has been applied to the measurements and survey-based estimates.

“Domestic” means that the GDP includes only the production by factors located in the country—whether home or foreign. GDP includes the production and income of foreigners and their property in the home country. However, It excludes the production and incomes of the country’s own citizens or their property abroad.

“Product” refers to the measurement of output at final prices in market transactions or of the market value of factors in their creation. Only newly produced goods—including those that increase inventories—are counted in GDP. Sales of used goods and sales from inventories of goods produced in prior years are excluded, but the services of dealers, agents, and brokers in implementing these transactions are included.

There are three ways of measuring the national income of a country. They are from the income side, the output side, and the expenditure side. Thus, we can classify these perspectives into the following methods of measurement.

Methods of Measuring National Income

  1. Product Method
  2. Income Method
  3. Expenditure Method

#1. Product Method

Under this method, we add the values of product output or services that the different sectors of the economy render during the year to calculate the National Income. So, we include only the value each firm adds in the production process in the output figure.

Hence, we use the value-added method. The value-added output of all the sectors of the economy is the GNP at factor cost. However, this method is unscientific as it adds the value of only those goods and services that are available for sale in the market

#2. Income Method

Under this method, we add all the incomes from employment and ownership of assets before taxation received from all the production activities in an economy.

Thus, it is also the Factor Income method. We also need to add the undistributed profits of the private sector and the trading surplus of the public sector corporations.

However, we need to exclude items not arising from productive activities. Those activities include sickness benefits, interest on the national debt, etc.

#3. Expenditure Method

This method measures the total domestic expenditure of the economy. It consists of two elements, viz. Consumption expenditure and Investment expenditure.

Consumption expenditure includes consumption expenditure of the household sector on goods and services and consumption outlays of the business sector and public authorities.

Investment expenditure refers to the expenditure on the making of fixed capital such as Plant and Machinery, buildings, etc.


National income accounting identity  is an equation that explains the relationship between the total income of an economy and it’s different categories. These categories include personal consumption expenditure, private investment, government spending, and net exports (total exports minus total imports).

The equation is given thus:



  • Y is the total income
  • C= personal consumption expenditure
  • I= private investment
  • G= government spending
  • (X-M) is the net exports: exports(X) – imports(M)

The national income accounting identity defines the gross domestic product effectively.


National income accounting uses a formula that shows the value of the total items manufactured within a country by its residents, and the income received by its residents.

The national income accounting formula is given thus:

National income= C+I+G+(X-M)+F-D


  • C= consumption
  • I= investments made within the country
  • G= government expenditure
  • X-M= net exports( export – import)
  • F= foreign production by the residents of the country
  • D= domestic production by residents of other countries

Read Also: THE ANNUAL PERCENTAGE YIELD: How It Works With Your Savings Account


National income accounting is important in many ways. It helps to measure inflation and deflation changes. Also, the information gotten from it helps in policymaking and planning. it is equally used to measure the standard of living of the country.

The economic growth of a Nation is determined by its national income.  So, the information obtained from the accounting gives the country insight into how well the economy is doing. This will spur the search for possible solutions to improve the economy.

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