Taxi
There are many taxi companies to choose from in Stockholm. Approved taxis with metered fares always bear yellow number plates. You can easily get hold of a taxi by calling a taxi company, hailing a one on the street or by taking a one from a rank, e.g. at NK on Hamngatan. There is a manned taxi centre at Central Station that can help you with finding the right service, e.g. if you need child seats in the vehicle.
Metered fares vary depending on the time of day. However, it shouldn't cost more than SEK 300 to travel 10 km (look for "jämfrpris" on the price information sticker). As a rule, large taxis are more expensive. The major taxi companies have fixed prices of between SEK 450-500 for trips to and from Arlanda. Always ask the driver beforehand. Credit cards are readily accepted. In addition to the major taxi companies there are several independent firms; caution is adviced.
Several of the big Stockholm taxi companies have a very high proportion of eco-vehicles. A new rota system gives priority to cabs with low carbon emission levels.