The business was started by Maria Belal Butt who is graduate of Pakistan Institute of Fashion and Design in 1999 in Lahore, Pakistan. A Fashion magazine called Maria Butt Coco Chanel of Pakistan. In start, she only had one shop and few stitching machines. She started her business with few thousands of investment. With aim to expand the brand, Maria B is now largest fashion designer brand of prêt a porter, couture, formal wear, lawn, embroidered fabrics, linen and cottons. 
In October 2017, it was reported that Pakistan is one of the countries whose middle class is growing speedily. It is among the 18 largest countries of the world by middle class number. It is expected that Pakistani middle class will continue to grow as their population increases. With that number in mind it is one of the attractive markets in the world. Most of Pakistani businesses are trying to target that middle class and same is true for Maria B. They made clothes of ever variety from couture to pret and made their clothes cheaper so they can increase their sales and therefore revenues. This enabled their business to grow from small shop with few tailors to one of the largest retailer in Pakistan.
In 2016, Maria B became the first designer who incorporated Austrian-based global leader of crystals Swarovski in their embroidered chiffon and lawn collections. They signed their deal in 2014 with Austrian giant.
The collection was launched on 27 August 2016