A special investigation team (SIT) formed by the Haryana Lokayukta has claimed to have detected revenue loss of more than Rs 10,000 crore, allegedly caused by builders and developers through tax evasion, officials said.

The estimated revenue loss is almost half of the state’s total plan outlay of Rs 20,252 crore for 2013-14.

Haryana Lokayukta justice Pritam Pal (retd) had formed the SIT in 2013 after a complaint filed by a Kaithal resident and the report was submitted to him on Thursday. The SIT is led by the Haryana inspector general of police Shrikant Jadhav.

Justice Pal, however, said he would comment on the report only after studying it.

The period when the alleged tax evasion took place extends from 2005 till mid-2013 when a Congress government led by Bhupinder Singh Hooda was in power.

The BJP, which came to power in 2013, had then accused the Hooda regime of giving undue benefits to businessman Robert Vadra, also the son-in-law Congress president Sonia Gandhi.

During the course of investigation, the SIT found that a large number of builders and developers in housing segment were not paying tax on the sale of flats in the state despite a Supreme Court ruling in this regard.

Moreover, they also allegedly indulged in filling “wrong” tax returns with the department, sources said.

SIT also discovered the involvement of a section of officials of the Haryana excise and taxation department, who allegedly helped the builders and developers to evade tax.

The probe team also found that though the department assessed several such cases of unregistered firms with tax liability running into crores, they did not pay any tax and instead moved the Punjab and Haryana high court on various grounds.

The SIT is said to have pointed out huge sales tax evasion in different trades, including real estate business, in different districts.

The SIT also found that some cigarette dealers in Faridabad were allegedly claimed bogus tax refund while a few rice sellers and exporters in Karnal and Sonepat allegedly got tax relief under the garb of consignment sales.