Periodic Labour Force Survey (PLFS) in India: Concepts, Indicators and ISS Exam Questions

The Periodic Labour Force Survey (PLFS) is a central source of official labour-market statistics in India. For ISS aspirants, PLFS is important because questions often test the definitions and relationships among Labour Force Participation Rate (LFPR), Worker Population Ratio (WPR), Unemployment Rate (UR), usual status and current weekly status.

1. What is PLFS?

PLFS provides regular statistics on labour-force participation, employment and unemployment. It is conducted by the National Statistics Office under MoSPI and is designed to generate labour-market indicators for different population groups and geographical areas.

2. LFPR, WPR and UR

The three basic indicators can be written as:

3. Why the denominator matters

UR uses the labour force as the denominator, whereas LFPR and WPR use the relevant population. Therefore, a fall in unemployment does not automatically mean that employment increased; people may also leave the labour force.

4. Usual status and current weekly status

PLFS uses different reference-period concepts for measuring labour-market activity. Usual status uses a longer reference period and captures a person's predominant activity status, while current weekly status uses the week preceding the survey date as the reference period.

The choice of status can affect the measured employment and unemployment rates, so an ISS answer should identify the reference period explicitly.

5. Reading PLFS tables correctly

Official PLFS tables can be cross-classified by rural/urban residence, sex, age group and State/UT. For example, the Annual PLFS 2025 publication reports unemployment rates by rural and urban sectors and by sex. When comparing figures, specify the year, status approach, age group and population before drawing a conclusion.

6. Common mistakes students make

• Using population instead of labour force as the denominator for UR.
• Assuming every unemployed person is outside the labour force.
• Ignoring the reference period when comparing usual status and current weekly status.
• Comparing two rates without checking age group, sex, rural/urban coverage and reference year.

7. Three important questions

Try each one on your own first, then tap the answer.

Key takeaways

• Know the definition, coverage and official source of the indicator before memorising numbers.
• Separate an index level from its percentage growth or inflation rate.
• Read the reference year, population, classification and weights carefully in numerical questions.
• For current-affairs-linked questions, verify the latest official MoSPI or Government of India release before the examination.