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NSTAR ELECTRIC COMPANY AND SUBSIDIARY CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating Revenues | $ 11,900,809 | $ 11,910,705 | $ 12,289,336
Operating Expenses: |  |  |
Purchased Power and Transmission | 3,736,078 | 5,168,241 | 5,014,074
Operations and Maintenance | 2,012,926 | 1,895,703 | 1,865,328
Depreciation | 1,433,503 | 1,305,840 | 1,194,246
Energy Efficiency Programs | 671,828 | 691,344 | 658,051
Taxes Other Than Income Taxes | 997,901 | 940,359 | 910,591
Total Operating Expenses | 9,492,100 | 9,511,370 | 10,091,182
Operating Income | 2,408,709 | 2,399,335 | 2,198,154
Interest Expense | 1,111,336 | 855,441 | 678,274
Other Income, Net | 410,482 | 348,069 | 346,088
Income/(Loss) Before Income Tax Expense | 1,243,836 | (275,037) | 1,865,968
Income Tax Expense | 424,664 | 159,684 | 453,574
NSTAR Electric Company |  |  |
Operating Revenues | 3,720,877 | 3,515,539 | 3,583,070
Operating Expenses: |  |  |
Purchased Power and Transmission | 1,045,306 | 1,154,013 | 1,264,824
Operations and Maintenance | 735,019 | 668,466 | 640,834
Depreciation | 407,699 | 372,578 | 361,969
Amortization of Regulatory Assets/(Liabilities), Net | 130,869 | 16,150 | 83,855
Energy Efficiency Programs | 263,405 | 325,593 | 332,247
Taxes Other Than Income Taxes | 280,261 | 256,090 | 246,705
Total Operating Expenses | 2,862,559 | 2,792,890 | 2,930,434
Operating Income | 858,318 | 722,649 | 652,636
Interest Expense | 222,794 | 189,254 | 162,892
Other Income, Net | 191,405 | 164,129 | 142,661
Income/(Loss) Before Income Tax Expense | 826,929 | 697,524 | 632,405
Income Tax Expense | 190,576 | 152,996 | 139,977
Net Income/(Loss) | $ 636,353 | $ 544,528 | $ 492,428

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