The details with regard to guidelines in respect of rewards to informers of tax evasion are:

Direct Taxes:- Any person who provides specific information with respect to evasion of direct taxes and such information helps in detection of undisclosed income and/or seizure of undisclosed cash, valuables resulting in levy and collection of extra income tax, is entitled to receive reward as per “Guidelines for grant of rewards to informants, 2007”, which came into effect from 1st December, 2007. As per the guidelines, the Competent Authority may grant reward not exceeding 10% of the extra income-tax and wealth-tax levied and actually realized, but subject to a ceiling of ₹ 15,00,000/- (rupees fifteen lakhs only) if the aforesaid taxes are directly attributable to the information, including documents, supplied by the informant. The monetary ceiling shall apply with reference to a Group of cases and not in respect of the individual assesses of the Group.

Indirect Taxes :- Central Board of Excise and Customs (CBEC) vide Circular No. 20/2015 dated 31.07.2015 has issued fresh reward guidelines for the Government servants and informers so as to get information about tax evasion.

The system does not scare away potential informers because the details of the informer is kept confidential and is not disclosed under any circumstances.

This was stated by Shri Jayant Sinha, Minister of State in the Ministry of Finance in written reply to a question in Lok Sabha.

Reward entitlement for tax evasion informers preserves confidentiality and caps percentage of collected tax as reward. Guidelines allow rewards for information leading to detection of undisclosed income or seizures that result in additional direct tax collection: the Competent Authority may grant up to ten percent of extra income-tax and wealth-tax realized attributable to the informant's information, subject to a group-level ceiling of fifteen lakh rupees. For indirect taxes, CBEC issued fresh reward guidelines encouraging information from government servants and informers. Informer identity is kept strictly confidential.