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Income taxes | 12 Months Ended
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Mar. 31, 2017
Income taxes | 21. Income taxes Income tax expense is comprised of the following:
|  | Years ended March 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Current income tax expense |  | Rs. | 54,954.4 |  |  | Rs. | 68,947.3 |  |  | Rs. | 84,273.5 |  |  | US$ | 1,299.6 |
Deferred income tax (benefit) expense |  |  | (352.1 | ) |  |  | (1,410.4 | ) |  |  | (5,048.6 | ) |  |  | (77.9 | )
Interest on income tax refund |  |  | (82.4 | ) |  |  | — |  |  |  | — |  |  |  | — |
Income tax expense |  | Rs. | 54,519.9 |  |  | Rs. | 67,536.9 |  |  | Rs. | 79,224.9 |  |  | US$ | 1,221.7 |
Pretax income and income tax expense are substantially all from India The following is the reconciliation of estimated income taxes at the Indian statutory income tax rate to income tax expense as reported:
|  | Years ended March 31, |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Income before income tax expense |  | Rs. | 154,024.6 |  |  | Rs. | 185,586.8 |  |  | Rs. | 219,965.5 |  |  | US$ | 3,392.0 |
Statutory income tax rate |  |  | 33.99 | % |  |  | 34.61 | % |  |  | 34.61 | % |  |  | 34.61 | %
Expected income tax expense |  |  | 52,353.0 |  |  |  | 64,227.9 |  |  |  | 76,125.7 |  |  |  | 1,174.0 |
Adjustments to reconcile expected income tax to actual tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest on income tax refund, net of tax effect |  |  | (54.4 | ) |  |  | — |  |  |  | — |  |  |  | — |
Nondeductible stock-based compensation |  |  | 3,106.3 |  |  |  | 4,358.5 |  |  |  | 2,839.0 |  |  |  | 43.8 |
Income exempt from taxes |  |  | (1,026.6 | ) |  |  | (1,140.5 | ) |  |  | (997.2 | ) |  |  | (15.4 | )
Effect of change in statutory tax rate |  |  | — |  |  |  | (274.3 | ) |  |  | — |  |  |  | — |
Other, net |  |  | 141.6 |  |  |  | 365.3 |  |  |  | 1,257.4 |  |  |  | 19.3 |
Income tax expense |  | Rs. | 54,519.9 |  |  | Rs. | 67,536.9 |  |  | Rs. | 79,224.9 |  |  | US$ | 1,221.7 |
The tax effects of significant temporary differences are as follows:
|  | As of March 31, |
|  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Tax effect of: |  |  |  |  |  |  |  |  |  |  |  |
Deductible temporary differences: |  |  |  |  |  |  |  |  |  |  |  |
Allowance for loan losses |  | Rs. | 14,396.4 |  |  | Rs. | 19,491.1 |  |  | US$ | 300.6 |
Investments, others |  |  | — |  |  |  | 265.2 |  |  |  | 4.1 |
Derivatives |  |  | 497.2 |  |  |  | 633.2 |  |  |  | 9.8 |
Employee benefits |  |  | 1,579.6 |  |  |  | 1,666.7 |  |  |  | 25.7 |
Others |  |  | 3,146.1 |  |  |  | 3,453.0 |  |  |  | 53.1 |
Deferred tax asset |  |  | 19,619.3 |  |  |  | 25,509.2 |  |  |  | 393.3 |
Taxable temporary differences: |  |  |  |  |  |  |  |  |  |  |  |
Property and equipment |  |  | 935.2 |  |  |  | 1,196.1 |  |  |  | 18.4 |
Loan origination cost |  |  | 2,291.2 |  |  |  | 2,883.5 |  |  |  | 44.5 |
Investments, others |  |  | 117.3 |  |  |  | — |  |  |  | — |
Unrealized gain on securities available for sale |  |  | 5,583.4 |  |  |  | 13,367.7 |  |  |  | 206.1 |
Intangible assets |  |  | 1.7 |  |  |  | 0.7 |  |  |  | — |
Deferred tax liability |  |  | 8,928.8 |  |  |  | 17,448.0 |  |  |  | 269.0 |
Net deferred tax asset (liability) |  | Rs. | 10,690.5 |  |  | Rs. | 8,061.2 |  |  | US$ | 124.3 |
Management believes that the realization of the recognized deferred tax assets is more likely than not based on expectations as to future pretax income. The total unrecognized tax benefit as on March 31, 2016 and March 31, 2017 is Rs. 648.3 million and Rs. 648.3 million, respectively. The major income tax jurisdiction for the Bank is India. The open tax years (first assessment by the tax authorities) is pending from fiscal 2015 onwards. However, appeals filed by the Bank are pending with various local tax authorities in India for earlier tax years. A reconciliation of the beginning and ending balance of unrecognized tax benefits is as follows:
|  | Year ended March 31, |
|  | 2016 |  |  | 2017 |  |  | 2017 |
|  | (In millions) |
Opening balance |  | Rs. | 648.3 |  |  | Rs. | 648.3 |  |  | US$ | 10.0 |
Increase/(decrease) related to prior year tax positions |  |  | — |  |  |  | — |  |  |  | — |
Closing balance |  | Rs. | 648.3 |  |  | Rs. | 648.3 |  |  | US$ | 10.0 |
The Bank’s total unrecognized tax benefits, if recognized, would reduce the income tax expense provisions by Rs. 648.3 million as of March 31, 2017 and thereby would affect the Bank’s effective tax rate. Significant changes in the amount of unrecognized tax benefits within the next 12 months cannot be reasonably estimated as the changes would depend upon the progress of tax examinations with various tax authorities. The Bank’s policy is to include interest and penalties related to gross unrecognized tax benefits within income taxes.

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- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -URI http://asc.fasb.org/topic&trid=2144680 + Details
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