Regularly it's around 30% for highest tax slab. Issue is if the income tax department believes arbitrarily that if the income isn't according to their norms they charge 200% under undisclosed income section. And in most such cases it's 200% and until you fight it out.
RE: Only 1.7% ie. 20 Million Indians out of 1.27 Billion pay Income Tax. Govt. trying to hit on 80 Million Crypto-Currency Traders