Phosphorus-fields nearby had played a big role in the development of Maardu as an industrial town. Now the phosphorus mining has been stopped because it is considered to be economically inexpedient. There have left many industrial apartments and labour power, which is necessary to find an exertion for.
City authorities encourage the development of small, average and large business.
The spectrum of business activities in Maardu is wide. More than 300 transport, building enterprises and processing companies successfully operate in the city not only from Estonia, but even from Europe, USA and China.
Foreign companies invest financial assets in the local enterprises, really estimating the opportunities and outlooks of the developmentof business in Maardu




Thermal power station "Iru" , which supplies with heat not only Maardu, but also Tallinn, has good and longterm outlook. 



Muuga Harbour is situated In the north part of the town . It was built in 1986 at a modern technological level. The cargo volume handled accounts for approximately 80% of the cargo volume passing through Estonia. It is among the deepest and most modern ports in the Baltic Sea region. Located 17 kilometres east of the city of Tallinn with good hinterland connections it has a major role in the transit trade of Estonia. Maardu town connects its industrial prospects with the development of Muuga Harbour, called trading gate to Europe, with a building of new terminals, with the construction of new berths, with transit trade. It will give new jobs, the development of the industrial infrastructure, the opportunity to enlist foreign investments.

An extensive free zone in Muuga Harbour grants more flexible customs procedures for companies rendering transit.