Tipping is common and in most cases expected in Kathmandu . In top range hotels and restaurants a good guideline is to tip around 10%. In smaller places some small change is fine. Taxi drivers don’t expect to be tipped. Bargaining is common place in many but not all cases and should be an enjoyable part of the transaction. Try to find out a fair price and remember the cost to you of a few rupees may be much less than the value to a local person. Standard food, accommodation and entry charges should be respected as well as following the going local rates for services.