AIITS 2026-2027 Official Test Series

Practise the Real IAT,
One Test at a Time.

India’s most comprehensive IISER Aptitude Test series for Class 11 and Class 12 aspirants. Part tests, full syllabus replicas, exact CBT exam mode, and detailed video solutions created by top IISER & NISER rankers.

Enroll Now in AIITS Trial Test (100% Free) View Schedule
Free mock test available instantly. No card or payment needed to try.

The Plan at a Glance

September to June, ending with official IAT
Live
20 Full Mock Tests with Rankings
5 Years IAT PYQ Replica Tests in CBT
2 Free Grand Mega Mocks across India
100% Real Computer-Based Test (CBT)

Ready to benchmark your current preparation level?

Real CBT Interface

Exact replica of the actual IAT computer-based screen.

Video Solutions

Step-by-step video analysis for full mock tests.

All India Ranking

Compete with thousands of science aspirants pan-India.

College Predictor

Know your chances at Pune, Kolkata, Mohali, Bhopal & more.

Structured Roadmap

Comprehensive Test Schedule

Class 11 and Class 12 are each divided into structured part tests followed by full-syllabus tests. Combined full-syllabus replica tests follow from April through June to peak right before the IAT.

Want to test drive our CBT platform before enrolling?

Experience real exam-level questions with timed countdowns and instant analysis.

Attempt Free Test Now Enroll in Complete Schedule
Detailed Syllabus Breakdown

Syllabus for Every Mock Test

Toggle between Class 11 and Class 12 to see the specific chapters covered in Physics, Chemistry, Mathematics, and Biology for each test.

Exclusive Advantages

Special Add-ons & Features

Everything you need for an unfair advantage in the IISER Aptitude Test.

5-Year IAT PYQ CBT Replicas

Authentic mock tests constructed strictly from previous 5 years of official IAT examination papers, simulated in real timed CBT mode.

100% Free

2 Grand Mega Mock Tests

Two massive India-level open tests where thousands of aspirants participate. Get an accurate All-India Rank (AIR) and performance benchmark.

Previous Year Mock Archive

Get instant access to previous year's curated mock tests for extra practice, revision marathons, and self-paced problem solving.

In-Depth Question Analytics

Detailed chapter-wise accuracy reports, time spent per question, negative marking penalties, and pinpointed knowledge gaps.

Personalized Test Support & Solutions

Taking tests without analysis is only half the battle. We help you diagnose every mistake and elevate your score.

  • Step-by-Step Video Solutions for all full-syllabus mock tests
  • Comprehensive Test Discussions by IISER Bhopal & NISER mentors
  • Score Improvement Strategies to minimize negative marking
  • Telegram & Community Support to clear test series doubts

Why 15,000+ Students Trust PREP4IISER

Built exclusively by science undergraduates and researchers who cracked IAT & NEST themselves.

Proven Track Record

Dozens of PREP4IISER students now studying at IISER Pune, Kolkata, Mohali, Bhopal, TVM, Tirupati & Berhampur.

Exact IAT Exam Algorithm

Same timing (+4 for correct, -1 for incorrect), question palette, and section navigation as official IAT.
Coming Soon to AIITS

Interactive Smart Test Generator

We are constantly upgrading our testing engine. When these new capabilities roll out, active AIITS enrolled students will get automatic free upgrades.

Create Custom Mock Test Chapter-Wise Timed Quizzes AI Weakness Radar Live Multiplayer Quizzes
Common Inquiries

Frequently Asked Questions

Have questions about AIITS? We have answers.

What is AIITS and how is it different from other mock tests?
AIITS (All India IISER Test Series) is specifically engineered by IISER students to emulate the true difficulty, question weighting, and multi-disciplinary thinking required for the IISER Aptitude Test (IAT). Unlike generic JEE or NEET mock tests, AIITS adheres 100% to the official PCMB syllabus and examination pattern of IISER.
Can I attempt mock tests on both mobile and PC/laptop?
Yes! AIITS runs seamlessly on modern web browsers across Windows, macOS, Android, and iOS. You can also take tests through the official PREP4IISER Android App available on the Google Play Store.
How do I take the Free Trial Mock Test?
Simply click the "Trial Test (100% Free)" button anywhere on this page. You can register/login with your phone number or email and immediately launch the computer-based test without paying anything.
Are video solutions available for every mock test?
Detailed text answers and complete analytical explanations are provided for all 20 tests. Comprehensive step-by-step video solutions and mentorship walkthroughs are provided for all full-syllabus mock tests.
What happens if I miss a scheduled test date?
Don't worry! Once a test is unlocked according to the schedule, it remains accessible in your student portal. You can take or re-attempt it anytime at your convenience until the official IAT 2026/27 exam.

Ready to Crack the IISER Aptitude Test?

Join thousands of dedicated science aspirants across India. Take your free mock test now or enroll in the complete test series.

Enroll Now in AIITS Start Free Mock Test Chat with Mentors