The Economic Survey and Budget documents are available for free on the official Press Information Bureau (PIB) and Union Budget websites. These are the primary sources Nitin Singhania uses.
For a foundational base, the Class 11 and 12 Economics NCERTs are available for free download on the NCERT official portal. indian economy nitin singhania free
Websites like Unacademy, Insight IAS, and various YouTube channels often provide free "Summary" videos or PDF notes based on Nitin Singhania’s chapters. The Economic Survey and Budget documents are available