The Planning Commission of India has been constituted :

The Planning Commission of India was established in March 1950 as a non-constitutional and non-statutory body [4]. It was not created by the Constitution of India nor through an Act of Parliament [3]. Instead, it was constituted through a simple resolution of the Government of India, specifically a Union Cabinet resolution [4]. This executive order defined its role as an advisory body to the Union Government, tasked with assessing national resources and formulating Five-Year Plans for economic and social development [5]. Because it was created by an executive decision rather than legislation or constitutional mandate, it is often referred to as an extra-constitutional body [4]. In 2015, it was replaced by the NITI Aayog through a similar cabinet resolution process [3].

Sources

1. [1] Politics in India since Independence, Textbook in political science for Class XII (NCERT 2025 ed.) > Chapter 3: Politics of Planned Development > Planning Commission > p. 48
2. [4] Introduction to the Constitution of India, D. D. Basu (26th ed.). > Chapter 26: ADMINISTRATIVE RELATIONS BETWEEN THE UNION AND THE STATES > Planning CommissioIl. > p. 397
3. [3] Introduction to the Constitution of India, D. D. Basu (26th ed.). > Chapter 26: ADMINISTRATIVE RELATIONS BETWEEN THE UNION AND THE STATES > ADMINISTRATIVE RELATIONS, BETWEEN THE UNION AND THE STATES > p. 398
4. [2] Indian Economy, Vivek Singh (7th ed. 2023-24) > Chapter 6: Indian Economy [1947 – 2014] > 6.6 Planning Commission and Five Year Plans > p. 222
5. [5] https://www.orfonline.org/expert-speak/42943-70-policies-planning-commission-1950