This page lists the section-wise syllabus and topic break-up for UPSC Indian Statistical Service / Indian Economic Service 2026 — Syllabus. The content is sourced from the official notification published by Union Public Service Commission (UPSC). The syllabus is authoritative for the current cycle and is intended for candidate revision and topic prioritisation. Each section below lists the topics in the order they typically appear in the official notification, with sub-topic depth aligned to the question paper's weightage. Always verify against the latest notification on the official website before finalising your preparation plan, since regulators occasionally tweak weightage or add/remove subjects between cycles.