New Delhi, Sep 6 - Contrary to popular belief, tax expenses of companies with the infrastructure status have gone up by 90.3 percent, a survey released here Sunday said.

According to the Associated Chambers of Commerce and Industry's (Assocham) Financial Pulse study, tax expenses for companies under the infrastructure status have gone up because of improved realisations.

This has contributed to better margins and improved bottomlines of such companies, thereby increasing their tax liabilities.

Infrastructure status is conferred upon industries and companies engaged in activities like building expressways, highways, airports, ports and rapid urban rail transport systems.

The corporates analyzed for the study for the first quarter of 2009-10 included Gammon Infrastructure Projects (25.