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Segment information | 12 Months Ended
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Mar. 31, 2021
Segment information | 2 5 . Segment information The Bank operates in three reportable segments: wholesale banking, retail banking and treasury services. The revenue and related expense recognition policies are set out in note 2. Substantially all operations and assets are based in India. The retail banking segment serves retail customers through a branch network and other delivery channels. This segment raises deposits from customers and grant loans, provides credit cards and debit cards, distributes third-party financial products, such as mutual funds and insurance to such customers. Revenues of the retail banking segment are derived from interest earned on retail loans, fees for banking services, profit from foreign exchange and derivative transactions and interest earned from other segments for surplus funds placed with those segments. Expenses of this segment are primarily comprised of interest expense on deposits, infrastructure and premises expenses for operating the branch network and other delivery channels, personnel costs, other direct overheads and allocated expenses. The Bank’s retail banking loan products also include loans to small and medium enterprises for commercial vehicles, construction equipment and other business purposes. Such grouping ensures optimum utilization and deployment of specialized resources in the retail banking business. The wholesale banking segment provides loans and transaction services to corporate customers. As discussed above, loans to small and medium enterprises for commercial vehicles, construction equipment and other business purposes are included in the retail banking segment. Revenues of the wholesale banking segment consist of interest earned on loans given to corporate customers, investment income from credit substitutes, interest earned on the cash float arising from transaction services, fees from such transaction services and profits from foreign exchange and derivative transactions with wholesale banking customers. The principal expenses of the segment consist of interest expense on funds borrowed from other segments, premises expenses, personnel costs, other direct overheads and allocated expenses. The treasury services segment undertakes trading operations on proprietary account (including investments in government securities), foreign exchange operations and derivatives trading both on proprietary account and customer flows and borrowings. Revenues of the treasury services segment primarily consist of fees and gains and losses from trading operations and of net interest revenue/expense from investments in government securities and borrowings. Revenues from foreign exchange and derivative operations and customer flows are classified under the retail or wholesale segments depending on the profile of the customer. Segment income and expenses include certain allocations. Interest income is charged by a segment that provides funding to another segment, based on yields benchmarked to an internally developed composite yield curve which broadly tracks market-discovered interest rates. Directly identifiable overheads are attributed to a segment at actual amounts incurred. Indirect shared costs, principally corporate office expenses, are generally allocated to each segment on the basis of area occupied, number of staff, volume and nature of transactions. Wholesale banking segment includes unallocated tax balances and other items. Summarized segment information for the years ended March 31, 2019, March 31, 2020 and March 31, 2021:
|  | Fiscal year ended March 31, |
|  | 2019 |  |  | 2020 |
|  | Retail Banking |  |  | Wholesale Banking |  |  | Treasury Services |  |  | Total |  |  | Retail Banking |  |  | Wholesale Banking |  |  | Treasury Services |  |  | Total |
|  | (In millions) |
Net interest income/(expense) (External) |  | Rs. | 336,677.1 |  |  | Rs. | 140,085.0 |  |  | Rs. | 30,743.5 |  |  | Rs. | 507,505.6 |  |  | Rs. | 356,017.3 |  |  | Rs. | 204,725.8 |  |  | Rs. | 32,784.3 |  |  | Rs. | 593,527.4 |
Net interest income/(expense) (Internal) |  |  | 62,339.1 |  |  |  | (43,842.8 | ) |  |  | (18,496.3 | ) |  |  | — |  |  |  | 127,065.9 |  |  |  | (101,002.5 | ) |  |  | (26,063.4 | ) |  |  | — |
Net interest revenue |  |  | 399,016.2 |  |  |  | 96,242.2 |  |  |  | 12,247.2 |  |  |  | 507,505.6 |  |  |  | 483,083.2 |  |  |  | 103,723.3 |  |  |  | 6,720.9 |  |  |  | 593,527.4 |
Less: Provision for credit losses |  |  | 64,051.0 |  |  |  | 8,228.3 |  |  |  | — |  |  |  | 72,279.3 |  |  |  | 104,516.8 |  |  |  | 13,105.1 |  |  |  | — |  |  |  | 117,621.9 |
Net interest revenue, after provision for credit losses |  |  | 334,965.2 |  |  |  | 88,013.9 |  |  |  | 12,247.2 |  |  |  | 435,226.3 |  |  |  | 378,566.4 |  |  |  | 90,618.2 |  |  |  | 6,720.9 |  |  |  | 475,905.5 |
Non-interest revenue |  |  | 138,783.0 |  |  |  | 23,789.6 |  |  |  | (2,450.4 | ) |  |  | 160,122.2 |  |  |  | 161,890.1 |  |  |  | 36,059.1 |  |  |  | 269.8 | ) |  |  | 198,219.0 |
Non-interest expense |  |  | (230,726.5 | ) |  |  | (22,744.8 | ) |  |  | (1,918.2 | ) |  |  | (255,389.5 | ) |  |  | (278,605.8 | ) |  |  | (27,774.0 | ) |  |  | (1,900.7 | ) |  |  | (308,280.5 | )
Income before income tax |  | Rs. | 243,021.7 |  |  | Rs. | 89,058.7 |  |  | Rs. | 7,878.6 |  |  | Rs. | 339,959.0 |  |  | Rs. | 261,850.7 |  |  | Rs. | 98,903.3 |  |  | Rs. | 5,090.0 |  |  | Rs. | 365,844.0 |
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 119,393.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 105,480.0 |
Segment assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment total assets |  | Rs. | 7,432,733.8 |  |  | Rs. | 4,732,290.7 |  |  | Rs. | 1,115,049.1 |  |  | Rs. | 13,280,073.6 |  |  | Rs. | 8,353,762.3 |  |  | Rs. | 5,933,391.4 |  |  | Rs. | 1,674,735.4 |  |  | Rs. | 15,961,889.1 |
| Fiscal year ended March 31, |
| 2021 |
| Retail Banking |  |  | Wholesale Banking |  |  | Treasury Services |  |  | Total |  |  |  | Total |
| (In millions) |
Net interest income/(expense) (External) | Rs. | 361,343.5 |  |  | Rs. | 278,431.0 |  |  | Rs. | 43,912.0 |  |  | Rs. | 683,686.5 |  |  | US$ |  | 9,347.8 |
Net interest income/(expense) (Internal) |  | 176,420.0 |  |  |  | (143,863.7 | ) |  |  | (32,556.3 | ) |  |  | — |  |  |  |  | — |
Net interest revenue |  | 537,763.5 |  |  |  | 134,567.3 |  |  |  | 11,355.7 |  |  |  | 683,686.5 |  |  |  |  | 9,347.8 |
Less: Provision for credit losses |  | 145,822.0 |  |  |  | 8,411.4 |  |  |  | — |  |  |  | 154,233.4 |  |  |  |  | 2,108.7 |
Net interest revenue, after provision for credit losses |  | 391,941.5 |  |  |  | 126,155.9 |  |  |  | 11,355.7 |  |  |  | 529,453.1 |  |  |  |  | 7,239.1 |
Non-interest revenue |  | 175,447.7 |  |  |  | 72,420.1 |  |  |  | 5,107.9 |  |  |  | 252,975.7 |  |  |  |  | 3,458.7 |
Non-interest expense |  | (306,461.1 | ) |  |  | (34,238.4 | ) |  |  | (1,902.8 | ) |  |  | (342,602.3 | ) |  |  |  | (4,684.2 | )
Income before income tax | Rs. | 260,928.1 |  |  | Rs. | 164,337.6 |  |  | Rs. | 14,560.8 |  |  | Rs. | 439,826.5 |  |  | US$ |  | 6,013.6 |
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | Rs. | 113,820.1 |  |  | US$ |  | 1,556.2 |
Segment assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment total assets | Rs. | 9,356,987.2 |  |  | Rs. | 7,011,959.9 |  |  | Rs. | 1,610,834.9 |  |  | Rs. | 17,979,782.0 |  |  | US$ |  | 245,826.9 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8981-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8657-108599 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8721-108599 Reference 14: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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