Miri mainly relies on its oil and gas industry, which contributes significantly to the Gross Domestic Product (GDP) of Sarawak. Sarawak Shell Berhad and Petronas Carigali have their headquarters based in Miri. The city is also home to numerous local and multinational oil and gas companies, including Nippon Oil, Schlumberger, Baker Hughes, Halliburton and Petra Resources and many others. The oil and gas industry not only infuses money into the economy, but also brings in expatriates from various countries.
Tourism is another important focus of the economy. Miri has a diverse ecology and a myriad of flora and fauna species. Four national parks and a marine national park are all located near Miri. Thus, it is often seen as a hub for ecotourism and a draw for nature enthusiasts.
Miri is also a shopping destination for the neighbouring country of Brunei Darussalam, as well as nearby smaller towns like Bintulu and Limbang.
The regional airline, MASwings, has its head office at Jalan Airport in