UPSC Syllabus
The UPSC Civil Services syllabus broken down topic by topic, for Prelims and each Mains paper, so nothing slips through the cracks.
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The CSE syllabus is a legal document — read it that way
The Civil Services Examination syllabus is published inside the annual notification on upsc.gov.in, and its wording is precise: every phrase in the GS papers' syllabus is a legitimate question area, and nothing outside it is. Toppers routinely re-read the syllabus until they can place any news item against a syllabus phrase from memory.
The subject pages here cover the optional subjects and GS areas we maintain material for; the notification remains the only complete authority, and it is re-issued each cycle.
Syllabus changes are rare but real: The CSE syllabus is stable across years, but the notification is the binding version for your attempt. Download it fresh when your cycle's notification is released rather than reusing last year's PDF.