The whole Prelims syllabus, taught end to end through UPSC's previous-year questions, with a test series alongside. Classes begin on 10 November 2026.
XINSHENG is the institute's Prelims crash course for the Civil Services Examination 2027. It covers the Prelims syllabus from end to end, and it teaches it through the questions UPSC has already asked: each topic is approached from the previous-year questions set on it — what was asked, how the options were built, and what a question on it can test next.
Classes begin on 10 November 2026. Each class is added here as a video lecture after it has been taught, so the curriculum on this page fills in as the course runs. Your enrolment covers every class added while your access lasts, at no extra cost.
A test series runs alongside the lectures. The 2027 papers are added to the course as they are set.
And the institute's past test series come with it, from the first day. The Xinsheng test series from 2022 to 2026 are included — subject tests, CSAT papers, practice tests and full-length papers, with the institute's explanations. Every answer key was checked question by question: wrong keys have been corrected, each with a note saying why, and questions that could not be marked fairly were taken out. They open the moment you enrol, so you can start writing papers weeks before the first class.
Every paper runs on the site's test engine: timed by the server, marked as the real paper is (+2 and −⅔ a question for General Studies, +2.5 and −⅚ for CSAT), and followed by a question-by-question review with the explanations.
1 section · 1 lecture · 2m of reading
How the course runs, and how to use the past papers.
6 series · 113 papers · 9,549 questions
Included with this course. Each paper is timed and marked as the real paper is, and the institute's explanations open when you submit.
The 2027 Prelims test series, with the past Xinsheng papers from 2022 to 2026. No video lectures.
0 papers · GS and CSAT
The 2026 Prelims test series as the institute set it: 20 papers, 1,951 questions.
20 papers · 1,951 questions · GS
The 2025 Prelims test series as the institute set it: 44 papers, 3,362 questions.
44 papers · 3,362 questions · GS and CSAT
The 2024 Prelims test series as the institute set it: 21 papers, 2,004 questions.
21 papers · 2,004 questions · GS and CSAT
The 2023 Prelims test series as the institute set it: 17 papers, 1,666 questions.
17 papers · 1,666 questions · GS
The 2022 Prelims test series as the institute set it: 11 papers, 566 questions.
11 papers · 566 questions · GS
Tests only is the XINSHENG 2027 Test Series: the 2027 papers as they are set and the past Xinsheng papers from 2022 to 2026, without the classes. Classes and tests adds the video classes. With mentoring adds one-to-one calls with a mentor. Complete adds the Answer Writing Mentorship Program for Mains, where a mentor checks each answer copy you send, and all of the CSAT lessons at no extra cost. The price of each is under Choose your option on this page, and each lasts 365 days.
Yes. Write to support@cortexdesk.in. The institute will tell you what the change costs and move your seat.
On 10 November 2026. Each class is added to the course as a video lecture after it has been taught, and the curriculum on this page fills in as they arrive. Your enrolment covers every class added while your access lasts; you do not pay again.
The past Xinsheng test series, 2022 to 2026, are open from the day you enrol. They are under Test series on this page, and each series lists its papers. Start with the subject you are revising, or take a full-length paper to see where you stand.
No. They are practice papers: take any of them as often as you like, and the explanations open as soon as you submit. Each is timed and marked the way the real paper is, so the score is a fair reading of where you stand.
Every key was checked question by question before the papers went up. Where the printed key was wrong it has been corrected, and that question's explanation opens with a note saying so. Questions that could not be marked fairly, such as those with two right options, none, or a fact that has since changed, were taken out.
Yes. The XINSHENG 2027 Test Series is sold on its own on the Tests page, for ₹8,500: the 2027 papers as they are set, and the past Xinsheng papers from 2022 to 2026, without the video lectures. Everyone sitting the 2027 papers is ranked together, on the course or not. If you hold the course, the series is already included.
For 365 days from the day you enrol.
Yes. One lesson is free to preview — look for Preview in the curriculum.
Through Razorpay, at checkout — card, UPI, net banking or a wallet. Your course unlocks as soon as the payment is confirmed, and a receipt is emailed to you.
Yes. Courses run in the browser on any phone, tablet or laptop.
