The price in the advert is rarely the full cost of buying. Work out the extra costs early so they do not catch you out. Rates change, so confirm current figures with the registration office or your lawyer.
Stamp duty and registration
These are paid to the government when the sale deed is registered, and the rate depends on the property and the state's rules.
Other costs
Add legal fees, loan processing charges, society transfer fees, and interior or moving costs. Keep a margin for the unexpected.
Ask for a full estimate
An advisor can list every cost for a specific property so you know your total before you commit.