LEAD-Prelims 2027
Learn what matters. Solve what's asked.
Smaran notes, GS and CSAT tests, and Open Tests with an All-India rank. The course starts on 1 December 2026.
Built for Prelims 2027 aspirants. You study at your own speed, and your access runs until 31 May 2027.
50% off the full price. Prices are before GST; 18% GST is added at checkout.
Notes, tests and answers in one place.
Read the notes. Take the test. See why each answer is right. Fix your mistakes. Repeat.
Smaran notes
Revision notes for each GS subject. Buyers can print the notes their plan covers.
GS tests
Concept Tests of 25 questions, Sectionals of 50, subject Full Tests and Mocks of 100. Every test is multiple choice, with negative marking like the real paper.
Solved Prelims PYQs, 2013–2026
Added during the coursePast UPSC Prelims papers from 2013 to 2026, solved, with explanations. GS papers come with every plan, CSAT papers with the plans that have CSAT.
Current affairs
A magazine for each month, April 2026 to April 2027. Tests for each month, April 2026 to March 2027. You also get two comprehensive Current Affairs booklets.
CSAT tests
Module tests, Sectionals and Full Tests of 80 questions, in Quant, Reasoning and Comprehension. In the plans with CSAT.
Open Tests
Five Sundays, with a GS and a CSAT Open Test on the same day. You sit each one live, once, and get your All-India rank.
Answers and an Error Log
Every question has an answer and an explanation. Questions you got wrong or skipped go to your Error Log, and you can retest them whenever you want.
Toppers' sessions
Sessions with toppers, from 1 March 2027.
Adaptive tests
Five GS and five CSAT tests, built from your own mistakes, after the Mocks. In every plan with Adaptive ticked.
Some of these are added during the course: the solved PYQs, the later magazines and the two comprehensive booklets.
What opens, and when.
Tests open in windows from 1 December. A window shows when a test is released. It is not a last date: a practice test stays open until 31 May 2027. Open Tests are live, so you sit them on their Sunday.
Concept Tests and Sectionals, Round 1
Concept Tests have 25 questions. Sectionals have 50.
Sectionals Round 2 and subject Full Tests
Round 2 covers the same syllabus with new, harder questions. Subject Full Tests have 100 questions.
Mocks 1 to 5
100 questions, 2 hours.
Mocks 6 to 15
One Mock a week. The last one is on Tuesday 6 April.
Open Tests with All-India rank
10 Jan, 21 Feb, 28 Mar, 25 Apr and 9 May. GS and CSAT Open Tests are on the same day. Live, one sitting.
CSAT Full Tests
80 questions, 2 hours. The first is on 2 Feb. The last is by 20 Apr.
Current affairs
A magazine and tests for each month.
Adaptive tests
Only in plans with Adaptive ticked. Each is built from your own mistakes.
Toppers' sessions
Pick your plan. GS + CSAT, or GS only.
Adaptive tests are ticked in each plan. Untick them if you don't want them. Every plan runs until 31 May 2027.
50% off the full price. Prices are before GST; 18% GST is added at checkout.
GS + CSAT
Both Prelims papers.
+ 18% GST · ₹2,948.82 in all
- All GS tests and Smaran notes
- All CSAT tests
- 5 GS and 5 CSAT Open Tests with All-India rank
- Solved Prelims PYQs 2013–2026, GS and CSAT (added during the course)
- 5 GS and 5 CSAT Adaptive tests, built from your mistakes
- Access until 31 May 2027
GS only
GS Paper I only.
+ 18% GST · ₹2,358.82 in all
- All GS tests and Smaran notes
- 5 GS Open Tests with All-India rank
- Solved Prelims PYQs 2013–2026, GS only (added during the course)
- 5 GS Adaptive tests, built from your mistakes
- No CSAT tests
- Access until 31 May 2027
Try it before you buy. 32 tests and 12 notes, free.
Sign in with Google or your email to open them. You do not need to pay. Free notes are for reading only. You cannot print them.
GS tests
Free- Prelims Demo 2525 questions · 30 min
- Polity · Concept Test 625 questions · 30 min
- Polity · Sectional 150 questions · 60 min
- Economy · Concept Test 825 questions · 30 min
- Economy · Sectional 150 questions · 60 min
- Geography · Concept Test 125 questions · 30 min
- Geography · Sectional 150 questions · 60 min
- Science & Tech · Concept Test 625 questions · 30 min
- Science & Tech · Sectional 250 questions · 60 min
- IR & Defence · Concept Test 425 questions · 30 min
- IR & Defence · Sectional 150 questions · 60 min
- History & Culture · Concept Test 525 questions · 30 min
- History & Culture · Concept Test 1425 questions · 30 min
- History & Culture · Sectional 150 questions · 60 min
- History & Culture · Sectional 450 questions · 60 min
- Environment · Concept Test 625 questions · 30 min
- Environment · Sectional (demo)50 questions · 60 min
- Polity · Full Test 1100 questions · 120 min
CSAT tests
Free- Quant 1 · Numbers and Number Relations · Level 120 questions · 30 min
- Quant 2 · Numbers and Number Relations · Level 220 questions · 30 min
- Quant 3 · Numbers and Number Relations · Level 320 questions · 30 min
- CSAT · Quant Sectional (demo)40 questions · 60 min
- Reasoning 4 · Arrangements and Puzzles · Level 120 questions · 30 min
- Reasoning 5 · Arrangements and Puzzles · Level 220 questions · 30 min
- Reasoning 6 · Arrangements and Puzzles · Level 320 questions · 30 min
- CSAT · Reasoning Sectional (demo)40 questions · 60 min
- Comprehension 4 · Inference and Implication · Level 120 questions · 30 min
- Comprehension 5 · Inference and Implication · Level 220 questions · 30 min
- Comprehension 6 · Inference and Implication · Level 320 questions · 30 min
- CSAT · Comprehension Sectional (demo)40 questions · 60 min
- CSAT Full Test 180 questions · 120 min
Notes
Free- Polity SmaranFull book · 115 pages
- Economy Smaran (sample)Sample · 8 pages
- Geography I Smaran: Physical Geography (sample)Sample · 8 pages
- Geography II Smaran: Human and Economic Geography (sample)Sample · 8 pages
- Geography Mapping Companion (sample)Sample · 8 pages
- Geography Mapping Practice Booklet (sample)Sample · 8 pages
- Science & Tech Smaran (sample)Sample · 8 pages
- IR & Defence Smaran (sample)Sample · 8 pages
- Ancient, Medieval, Art & Culture Smaran (sample)Sample · 8 pages
- Modern History Smaran (sample)Sample · 8 pages
- Environment Smaran (sample)Sample · 8 pages
Quick answers.
When does LEAD-Prelims 2027 start?
On 1 December 2026. It is self-paced. Tests and notes open on a schedule from that day, and you study at your own speed. Your access runs until 31 May 2027.
Who is it for?
Aspirants preparing for UPSC Prelims 2027. It covers GS Paper I. It covers CSAT too, if you pick a plan with CSAT.
What is the difference between the plans?
GS + CSAT has the tests and notes for both papers. GS only has GS Paper I. Each plan can come with Adaptive tests, which are built from your own mistakes. Keep the Adaptive box ticked to get them.
Are Prelims PYQs included?
Yes. Solved UPSC Prelims papers from 2013 to 2026, with explanations. GS papers come with every plan. CSAT papers come with the plans that have CSAT. We add them to your course over time.
Can I add CSAT later if I buy GS only?
Yes. You can buy the GS + CSAT plan later. It is a new purchase at the GS + CSAT price, so GS is paid for again.
Is GST extra?
Yes. The prices on this page are before GST. 18% GST is added at checkout, and you see the total before you pay.
How do the Open Tests work?
Open Tests are live on five Sundays: 10 Jan, 21 Feb, 28 Mar, 25 Apr and 9 May 2027. GS and CSAT Open Tests are on the same day. Plans with GS get the GS Open Test, and plans with CSAT get the CSAT one too. You sit each Open Test once, and you get an All-India rank.
How are the tests marked?
Every test is multiple choice, with four options. A wrong answer costs about one-third of the marks for that question, as in the real paper.
Can I retake a test?
Practice tests can be retaken once you have finished them. After you finish, you see the answers with explanations, and your wrong and skipped questions go to your Error Log, where you can retest them. An Open Test is one sitting only.
Can I print the notes?
Yes. Buyers can print the notes their plan covers. Each printed page carries a watermark with your details.
Who designed the course?
Rahul Shekhar (AIR 75, UPSC CSE 2025) designed and reviewed it.
How can I contact you?
Write to contact@leanprep.in.
Start on 1 December.
Pick your plan. Your access runs until 31 May 2027.
Questions? Write to contact@leanprep.in