Ideally, start preparing 10-12 months before the exam, typically from Class 11 or early Class 12, to build a strong foundation and have sufficient time for newspaper reading, mock tests, and revision. If you’re starting late, 6 months of focused preparation can still work if you’re disciplined with daily newspaper reading, consistent mock tests, and structured study plans. The key is regular practice rather than last-minute cramming, especially for current affairs and reading comprehension, which require sustained daily effort rather than intensive short-term preparation.