Janakpur is one of the fastest developing cities of Nepal and is the largest sub-metropolitan city in the country. The city has good health care facilities, a number of parks, private schools, colleges, and internet service providers. There are medical, engineering, and management colleges that are affiliated to Tribhuvan University. The economy is mostly based on tourism, agriculture, and local industries.
The paintings on pottery, walls, and courtyards made by Maithili women are known as Mithila art.
Janakpur attracts migrants from the surrounding area, moving to the city for medical care, education, and jobs. The largest employers were the Janakpur Cigarette Factory Limited and Janakpur Railway until they closed in 2013 due to political corruption and heavy loans. By the end of 2018 service was resumed. Zonal Hospital, Zonal Police, and the Banking Sector help the locals live a relatively easy lifestyle.
The city has many commercial banks, such as Nepal Rastra Bank, the State Bank of India, Nepal, Everest Bank LTD. Machhapuchhare, NIC Bank, Nepal Bank LTD, and Agriculture Development Bank.