ATMs are widespread, and credit cards are widely accepted.
There is no tipping culture here; recipients may appear confused by the gesture. In cities with large expat communities, tipping is slowly spreading, and the following guidelines could be applied.
Airports SR5 to SR10 for baggage handlers.
Petrol Stations SR5 to SR10 for pump attendants.
Hotels SR10 to SR20 for porters; gratuity for cleaning staff is at your discretion.
Taxis 10% will be appreciated, as will rounding up to the nearest unit of SR10.
Restaurants 10% for good service.