Tipping is virtually unknown in India, except in swanky establishments in the major cities. In tourist restaurants or hotels a 10% service charge is often added to bills. In smaller places, where tipping is optional, you need only tip a few rupees, not a percentage of your bill. Most major hotels include a service charge of 10%. Waiters, room service boys, housekeepers, porters, and doormen all expect to be tipped. Railroad porters should be paid Rs. 5 - Rs. 10 per bag, depending on the weight. Set the rate before you let him take your bags. Taxi drivers don't expect tips unless they go through a great deal of trouble to get to your destination, but if you hire a car with a driver, tip him about Rs.50-Rs. 100 per day, depending on the distance travelled. If you hire a local guide, tip him or her Rs. 40 for four hours, Rs. 80 for a full day.