New Delhi, Dec. 23 -- States will soon be able to estimate their economic growth more accurately using real-time tax filing data, a senior government official said Monday, as India prepares to unveil a revamped system for measuring national output.

The availability of up-to-the-minute information from the Goods and Services Tax Network (GSTN) will significantly improve how states calculate their Gross State Domestic Product, according to Saurabh Garg, Secretary in the Ministry of Statistics and Programme Implementation.

"We now have a lot of real-time data available with GSTN, and we will be able to use that to help estimate state domestic product. We will have better triangulation mechanisms available," Garg said.

The ministry will al...