Norway's emergence as a major oil and gas producer in the mid-1970s transformed the economy. Large sums of investment capital poured into the offshore oil sector, leading to greater increases in Norwegian production costs and wages than in the rest of western Europe up to the time of the global recovery of the mid-1980s. The influx of oil revenue also permitted Norway to expand an already extensive social welfare system. Norway has established a state Petroleum Fund that exceeded $132.6 billion as of December 2004. The fund primarily will be used to help finance government programs once oil and gas resources become depleted. Norway is currently enjoying large foreign trade surpluses thanks to high oil prices. Unemployment remains currently low (3%-4% range), and the prospects for economic growth are encouraging thanks to the government's stimulative fiscal policy and economic recovery in the United States and Europe.

Norway voted against joining the European Union (EU) in a 1994 referendum. With the exception of the agricultural and fisheries sectors, however, Norway enjoys free trade with the EU under the framework of the European Economic Area. This agreement aims to apply the four freedoms of the EU's internal market (goods, persons, services, and capital) to Norway. As a result, Norway normally adopts and implements most EU directives. Norwegian monetary policy is aimed at maintaining a stable exchange rate for the krone against European currencies, of which the euro is a key operating parameter. Norway is not a member of the EU's Economic and Monetary Union and does not have a fixed exchange rate. Its principal trading partners are in the EU; the United States ranks sixth.

Norway is the world's third-largest oil exporter and provides much of western Europe's crude oil and gas requirements. In 2003, Norwegian oil and gas exports accounted for 56% of total merchandise exports. In addition, offshore exploration and production have stimulated onshore economic activities. Foreign companies, including many American ones, participate actively in the petroleum sector.