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REVENUE (Tables) | 12 Months Ended
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Dec. 31, 2021
Schedule of net operating revenue | Schedule of net operating revenue
|  | 2021 |  | 2020 |  | 2019
Revenue from supply of energy (a) |  |  | 29,619 |  |  |  | 26,432 |  |  |  | 26,928 |
Revenue from use of the electricity distribution systems (TUSD) (b) |  |  | 3,448 |  |  |  | 3,022 |  |  |  | 2,722 |
CVA, and Other financial components (c) |  |  | 2,146 |  |  |  | 455 |  |  |  | 58 |
Reimbursement of PIS/Pasep and Cofins over ICMS credits to customers– realization (1) |  |  | 1,317 |  |  |  | 266 |  |  |  | — |
Transmission revenue |  |  |  |  |  |  |  |  |  |  |  |
Transmission operation and maintenance revenue (d) |  |  | 355 |  |  |  | 280 |  |  |  | 352 |
Transmission construction revenue (d) (note 14) |  |  | 252 |  |  |  | 201 |  |  |  | 312 |
Interest revenue arising from the financing component in the transmission contract asset (d) (note 14) |  |  | 660 |  |  |  | 438 |  |  |  | 328 |
Distribution construction revenue |  |  | 1,852 |  |  |  | 1,436 |  |  |  | 980 |
Adjustment to expectation of cash flow from indemnifiable financial assets of distribution concession (e) |  |  | 54 |  |  |  | 16 |  |  |  | 18 |
Revenue on financial updating of the Concession Grant Fee (f) |  |  | 523 |  |  |  | 347 |  |  |  | 318 |
Energy transactions on the CCEE (g) |  |  | 1,157 |  |  |  | 154 |  |  |  | 432 |
Mechanism for the sale of surplus (h) |  |  | 453 |  |  |  | 234 |  |  |  | — |
Supply of gas |  |  | 3,470 |  |  |  | 2,011 |  |  |  | 2,298 |
Fine for violation of service continuity indicator |  |  | (70 | ) |  |  | (51 | ) |  |  | (58 | )
Advances for services provided (i) |  |  | 154 |  |  |  | — |  |  |  | 1,428 |
Other operating revenues (j) |  |  | 1,935 |  |  |  | 1,709 |  |  |  | 1,721 |
Deductions on revenue (k) |  |  | (13,679 | ) |  |  | (11,722 | ) |  |  | (12,351 | )
Net revenue |  |  | 33,646 |  |  |  | 25,228 |  |  |  | 25,486 |
| (1) | For more information, see note 9a from these financial statements.
This table shows energy supply by type of customer: | This table shows energy supply by type of customer:
|  | GWh (1) |  | R$
|  | 2021 |  | 2020 |  | 2019 |  | 2021 |  | 2020 |  | 2019
Residential |  |  | 11,186 |  |  |  | 10,981 |  |  |  | 10,538 |  |  |  | 11,124 |  |  |  | 9,875 |  |  |  | 9,668 |
Industrial |  |  | 16,361 |  |  |  | 12,731 |  |  |  | 14,873 |  |  |  | 5,275 |  |  |  | 4,171 |  |  |  | 4,760 |
Commercial, services and others |  |  | 8,334 |  |  |  | 8,571 |  |  |  | 9,335 |  |  |  | 5,520 |  |  |  | 4,979 |  |  |  | 5,439 |
Rural |  |  | 3,975 |  |  |  | 3,766 |  |  |  | 3,795 |  |  |  | 2,566 |  |  |  | 2,190 |  |  |  | 2,058 |
Public authorities |  |  | 729 |  |  |  | 714 |  |  |  | 905 |  |  |  | 583 |  |  |  | 522 |  |  |  | 654 |
Public lighting |  |  | 1,226 |  |  |  | 1,243 |  |  |  | 1,357 |  |  |  | 718 |  |  |  | 550 |  |  |  | 614 |
Public services |  |  | 1,418 |  |  |  | 1,362 |  |  |  | 1,373 |  |  |  | 879 |  |  |  | 722 |  |  |  | 725 |
Subtotal |  |  | 43,229 |  |  |  | 39,368 |  |  |  | 42,176 |  |  |  | 26,665 |  |  |  | 23,009 |  |  |  | 23,918 |
Own consumption |  |  | 33 |  |  |  | 34 |  |  |  | 38 |  |  |  | — |  |  |  | — |  |  |  | — |
Unbilled revenue |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (14 | ) |  |  | 9 |  |  |  | 134 |
|  |  | 43,262 |  |  |  | 39,402 |  |  |  | 42,214 |  |  |  | 26,651 |  |  |  | 23,018 |  |  |  | 24,052 |
Wholesale supply to other concession holders (2) |  |  | 10,825 |  |  |  | 13,907 |  |  |  | 11,920 |  |  |  | 3,023 |  |  |  | 3,363 |  |  |  | 2,943 |
Wholesale supply unbilled, net |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (55 | ) |  |  | 51 |  |  |  | (67 | )
Total |  |  | 54,087 |  |  |  | 53,309 |  |  |  | 54,134 |  |  |  | 29,619 |  |  |  | 26,432 |  |  |  | 26,928 |
| (1) | Data not examined by external auditors.
| (2) | Includes a CCEAR (Regulated Market Sales Contract), ‘bilateral contracts’ with other agents, and the revenues from management of generation assets (GAG) for the 18 hydroelectric plants of Lot D of Auction no 12/2015.
The total amount of energy transported, in MWh, is as follows: | These are recognized upon the distribution infrastructure becoming available to customers, and the fair value of the consideration is calculated according to the TUSD tariff of those customers, set by the grantor. The total amount of energy transported, in MWh, is as follows:
|  | GWh (1)
|  | 2021 |  | 2020 |  | 2019
Industrial |  |  | 20,447 |  |  |  | 18,612 |  |  |  | 17,723 |
Commercial |  |  | 1,535 |  |  |  | 1,300 |  |  |  | 1,320 |
Rural |  |  | 44 |  |  |  | 32 |  |  |  | 17 |
Public authorities |  |  | 4 |  |  |  | — |  |  |  | — |
Concessionaires |  |  | 310 |  |  |  | 315 |  |  |  | 341 |
Total |  |  | 22,340 |  |  |  | 20,259 |  |  |  | 19,401 |
| (1) | Data not audited by external auditors
The margin defined for each performance obligation from the transmission concession contract is as follows: | The margin defined for each performance obligation from the transmission concession contract is as follows:
|  | 2021 |  | 2020 |  | 2019 (1)
Construction and upgrades revenue |  |  | 252 |  |  |  | 201 |  |  |  | 312 |
Construction and upgrades costs |  |  | (183 | ) |  |  | (147 | ) |  |  | (220 | )
Margin |  |  | 69 |  |  |  | 54 |  |  |  | 92 |
Mark-up (%) |  |  | 37.40 | % |  |  | 36.73 | % |  |  | 41.82 | %
Operation and maintenance revenue |  |  | 355 |  |  |  | 279 |  |  |  | 352 |
Operation and maintenance cost |  |  | (235 | ) |  |  | (223 | ) |  |  | (388 | )
Margin |  |  | 120 |  |  |  | 56 |  |  |  | (36 | )
Mark-up (%) |  |  | 50.88 | % |  |  | 25,11 | % |  |  | (9.28 | %)
| (1) | The negative margin observed in 2019 related to the performance obligation to operate and maintain is due the recognition of the non-recurring tax provision, in the amount of R$135.
Other operating revenues |
| j) | Other operating revenues
|  | 2021 |  | 2020 |  | 2019
Charged service |  |  | 17 |  |  |  | 11 |  |  |  | 17 |
Services rendered |  |  | 53 |  |  |  | 139 |  |  |  | 183 |
Subsidies (1) |  |  | 1,592 |  |  |  | 1,395 |  |  |  | 1,266 |
Rental and leasing |  |  | 211 |  |  |  | 164 |  |  |  | 189 |
Reimbursement for decontracted supply (2) |  |  | 27 |  |  |  | — |  |  |  | 65 |
Other |  |  | 35 |  |  |  | — |  |  |  | 1 |
Total |  |  | 1,935 |  |  |  | 1,709 |  |  |  | 1,721 |
| (1) | Includes the revenue recognized for the tariff subsidies applied to users of the distribution system, in the amount of R$986 in 2021 (R$1,035 in 2020). Includes the subsidies for sources that are subject to incentive, rural, irrigators, public services and the generation sources that are subject to the incentive; and also includes the tariff flag revenue in the amount of R$108 in 2021, recognized because of the creditor position assumed by the Company in CCRBT; and revenue recognized arising from subsidies, in the amount of R$205, relating to the Program to Encourage Voluntary Reduction of Energy Consumption.
| (2) | Reimbursement for suspension of energy supply –Renova.
Deductions on revenue |
| k) | Deductions on revenue
|  | 2021 |  | 2020 |  | 2019
Taxes on revenue |  |  |  |  |  |  |  |  |  |  |  |
ICMS |  |  | 6,993 |  |  |  | 6,098 |  |  |  | 6,358 |
Cofins |  |  | 2,842 |  |  |  | 2,214 |  |  |  | 2,408 |
PIS/Pasep |  |  | 618 |  |  |  | 481 |  |  |  | 524 |
Others |  |  | 11 |  |  |  | 5 |  |  |  | 7 |
|  |  | 10,464 |  |  |  | 8,798 |  |  |  | 9,297 |
Charges to the customer |  |  |  |  |  |  |  |  |  |  |  |
Global Reversion Reserve (RGR) |  |  | 15 |  |  |  | 16 |  |  |  | 16 |
Energy Efficiency Program (PEE) |  |  | 74 |  |  |  | 73 |  |  |  | 69 |
Energy Development Account (CDE) |  |  | 2,658 |  |  |  | 2,443 |  |  |  | 2,448 |
Research and Development (R&D) |  |  | 34 |  |  |  | 43 |  |  |  | 41 |
National Scientific and Technological Development Fund (FNDCT) |  |  | 55 |  |  |  | 43 |  |  |  | 41 |
Energy System Expansion Research (EPE of MME) |  |  | 27 |  |  |  | 21 |  |  |  | 20 |
Customer charges – Proinfa alternative sources program |  |  | 66 |  |  |  | 39 |  |  |  | 52 |
Energy services inspection fee |  |  | 35 |  |  |  | 35 |  |  |  | 30 |
Royalties for use of water resources |  |  | 37 |  |  |  | 62 |  |  |  | 43 |
Customer charges – the ‘Flag Tariff’ system |  |  | 162 |  |  |  | 149 |  |  |  | 294 |
CDE on R&D |  |  | 21 |  |  |  | — |  |  |  | — |
CDE on PEE |  |  | 31 |  |  |  | — |  |  |  | — |
|  |  | 3,215 |  |  |  | 2,924 |  |  |  | 3,054 |
|  |  | 13,679 |  |  |  | 11,722 |  |  |  | 12,351 |

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