New Delhi, Nov. 5 -- Logistics company Delhivery is betting on cost efficiencies built over the past year, and a steadier market to expand profit margins, even though the timing of the goods and services tax (GST) changes hurt shipment volumes in September.

At a post-earnings call on Wednesday for the September quarter, Delhivery chief executive Sahil Barua said that after acquiring Ecom Express, the company no longer needs heavy discounts, and its Express margins can rise above 18% as competition eases and smaller rivals retreat.

Delhivery completed the acquisition of Gurugram-based Ecom Express for Rs.1,407 crore in July, gaining shipment volume and market share.

"Post the acquisition, we're probably closer to somewhere between 27 an...