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Global Adjustment - Archive

The Global Adjustment (GA) is the difference between the total payments made to certain contracted or regulated generators and any offsetting market revenues, as well as the costs of conservation and demand response programs.

The following tables summarize the GA since its inception in January 2005. Prior to January 1, 2011 the Global Adjustment was called Provincial Benefit on bills for customers served by local distribution companies (LDCs).

Available GA Tables:

Global Adjustment Values - 2005-2014

Estimated Global Adjustment - Effective January 1, 2011

Posted Estimated Global Adjustment ($/MWh) for 2005-2010

Fixed Global Adjustment ($/MWh) for Distributor Billing for 2005-2010*


Global Adjustment Values - 2005-2014

​2014 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$)87.841.734.662.462.354.358.566.253.779.180.183.1
​GA-OPG (M$) -66.3-138.1-152.688.7173.2137178.2177.7216.3271208.8298.3
​GA-OPA (M$) 139.2245.9116.1369.6467.9435.6435.6473.7514.5637.4581.3462.1
​Total GA (M$)160.7149.5-1.9520.7703.4626.9672.3717.6784.5987.5870.2843.5
GA ($/MWh)12.6113.30-0.2751.9871.9660.2562.5667.6179.63100.1482.32 74.44
Class A Total (M$)16.715.5-0.254.273.165.164.868.875.294.783.4 80.9
​Class B Total (M$)144134-1.7466.5630.3561.8607.5648.8709.3892.8786.8 762.6

​2013 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) ​100.6 93.2​ 112.7​ 90.1​ 90.7​ 90.5​ 79.4​ 89.2​ 86.1​ 99.1​ 112.1​ 88.9​
​GA-OPG (M$) ​127.7 ​106.4 ​111.8 ​136.3 ​155.1 ​161.1 ​139.1 180.1​ 163.2​ 157​.0 197.2​ 117.9​
​GA-OPA (M$) ​380.2 ​328.1 ​330.3 ​388.4 ​411.4 ​473.0 ​391.1 ​430.5 ​408.1 ​378.1 ​537.7 ​384.9
​Total GA (M$) ​608.5 527.7​ 554.8​ 614.8​ 657.2​ 724.6​ 609.6​ 699.8​ 657.4​ 634.2​ 847​.0 591.7​
GA ($/MWh)​49.9948.14​49.26​58.59​67.59​70.43​50.89​62.45​66.55​63.12​78.55​50.68​
Class A Total (M$) ​62.8 54.5​ ​57.3 63.6​ 67.9​ 74.9​ 63.4​ 72.8​ 68.4​ 66​.0 88.1​ 61.6​
​Class B Total (M$) 545.7​ 473.2​ 497.5​ 551.2​ 589.3​ 649.7​ 546.1​ 627​.0 589​.0 568.2​ 758.9​ 530.1​

​2012 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) 105.9 103.4 119.4 91.3 92.3 82.0 61.9 73.1 78.0 78.0 108.9 96.9
​GA-OPG (M$) 152.0 160.2 202.4 167.5 170.9 176.1 114.1 142.2 131.5 152.5 132.6 146.3
​GA-OPA (M$) 254.4 286.4 344.7 335.9 315.0 326.7 245.7 269.5 269.4 315.1 333.7 219.8
​Total GA (M$) 512.3 550.0 666.5 594.7 578.2 584.8 421.7 484.8 478.9 545.6 575.2 463.0
GA ($/MWh) 42.46 50.62 62.34 60.72 56.5 52.55 33.59 41.78 47.62 53.81 54.26 40.64
Class A Total (M$) 51.0 54.8 66.4 59.2 57.6 58.2 42.4 49.0 48.4 55.3 59.2 47.8
​Class B Total (M$) 461.3 495.2 600.1 535.5 520.6 526.6 379.2 435.9 430.5 490.3 516.0 415.2

​2011 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) 110.1 94.2 101.2 82.2 82.1 102.0 87.0 64.5 50.5 88.9 103.6 116.6
​GA-OPG (M$) 118.6 94.3 96.7 114.9 147.0 92.6 80.4 112.0 105.0 118.9 119.5 147.0
​GA-OPA (M$) 240.4 205.0 229.8 243.3 269.1 228.5 224.3 249.6 235.9 249.1 227.9 276.9
​Total GA (M$) 469.1 393.5 427.7 440.4 498.2 423.1 391.7 426.1 391.4 456.9 451.0 540.5
GA ($/MWh) 37.01 35.18 36.83 43.89 50.05 40.48 31.3 36.57 38.49 45.4 43.46 47.15
Class A Total (M$) 51.1 42.9 46.6 47.9 54.2 46.0 39.0 42.4 38.9 45.5 44.9 53.8
​Class B Total (M$) 418.0 350.6 381.1 392.5 444.0 377.1 352.7 383.7 352.5 411.4 406.1 486.7

​2010 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) 96.8 108.9 111.2 97.7 77.1 49.7 47.4 31.0 43.4 99.2 92.4 104.8
​GA-OPG (M$) 77.5 71.6 124.1 89.4 41.4 50.8 -5.3 27.8 97.8 108.9 101.5 103.9
​GA-OPA (M$) 178.0 121.7 214.6 183.9 154.7 181.9 56.8 99.0 172.5 236.1 195.5 203.7
​Total GA (M$) 352.9 302.2 451.1 371.1 273.2 282.4 98.8 156.8 313.7 443.7 389.4 412.4
GA ($/MWh) 27.00 25.91 39.07 35.60 24.34 24.66 7.50 12.25 28.42 40.34 34.14 32.27
Since Jan 1 GA ($/MWh) 27.00 26.49 30.49 31.63 30.22 29.30 25.82 24.01 24.46 25.95 26.67 27.18

​2009 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) 41.9 40.3 64.0 69.9 76.7 91.9 89.8 106.7 72.4 106.6 106.3 95.0
​GA-OPG (M$) 0.1 28.4 136.9 167.3 99.7 167.3 202.3 168.3 189.9 133.5 148.6 109.1
​GA-OPA (M$) -25.5 80.2 134.3 168.8 152.0 146.7 174.8 178.4 168.8 142.6 197.6 187.0
​Total GA (M$) 16.5 148.9 335.2 406.1 329.2 405.9 466.9 453.4 431.1 382.7 452.5 391.1
GA ($/MWh) 1.21 12.83 27.79 37.96 31.42 37.74 41.72 37.50 39.80 34.49 40.79 31.05
Since Jan 1 GA ($/MWh) 1.21 6.56 13.43 18.90 21.13 23.72 26.22 27.70 28.97 29.51 30.51 30.56

​2008 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA-OEFC-NUG (M$) 56.9 46.5 40.1 43.1 44.8 24.8 26.1 31.1 25.0 47.1 42.4 51.6
​GA-OPG (M$) 30.4 -36.5 -64.1 -21.1 45.8 -64.6 -63.7 -7.9 -20.3 1.7 -33.9 43.8
​GA-OPA (M$) 30.2 34.1 37.2 43.4 83.5 38.6 79.8 66.8 30.3 44.1 49.8 74.0
​Total GA (M$) 117.5 44.1 13.2 65.3 174.1 -1.2 42.2 90.0 34.9 92.9 58.4 169.3
GA ($/MWh) 8.69 3.44 1.02 5.73 15.42 -0.10 3.26 7.26 2.99 8.04 4.98 13.08
Since Jan 1 GA ($/MWh) 8.69 6.14 4.45 4.74 6.69 5.58 5.23 5.49 5.23 4.54 5.45 6.12

​2007 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA (M$) 93 -71 -5 56 123 78 81 4 56 41 80 61
GA ($/MWh) 6.81 -5.50 -0.37 4.72 10.40 6.23 6.37 0.30 4.77 3.52 6.50 4.56
Since Jan 1 GA ($/MWh) 6.81 0.81 0.42 1.41 3.08 3.60 4.00 3.52 3.65 3.63 3.89 3.95

​2006 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA (M$) -32 53 31 70 37 35 14 -9 154 125 46 130
GA ($/MWh) -2.40 4.26 2.36 6.15 3.10 2.85 1.02 -0.66 13.46 10.55 3.79 10.14
Since Jan 1 GA ($/MWh) -2.40 0.80 1.32 2.41 2.54 2.60 2.35 1.96 3.12 3.83 3.82 4.36

​2005 Jan​ ​Feb ​Mar ​Apr ​May ​Jun ​Jul ​Aug ​Sep ​Oct ​Nov ​Dec
GA (M$) 21 35 27 -63 -18 -94 -170 -244 -261 -140 -44 -202
GA ($/MWh) 1.44 2.78 2.01 -5.40 -1.55 -7.06 -12.31 -17.82 -21.37 -11.66 -3.57 -14.82
Since Jan 1 GA ($/MWh) 1.44 2.06 2.05 0.37 0.02 -1.20 -2.89 -4.84 -6.57 -7.05 -6.74 -7.45

Note: Positive amount denotes a charge as per IESO settlement.

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Estimated Global Adjustment - Effective January 1, 2011

2014 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1st Estimate ($/MWh) 36.26 22.31 11.03-9.6553.56 71.90 59.7661.08 80.4974.9299.0173.18
2nd Estimate (M$) 210.6178.0 -67.7 476.7 675.3 651.6 673.2 724.4 795.2 1009.2 919.1 729.0
2nd Estimate ($/MWh) 18.06 11.18 -8.00 54.5373.52 66.6457.5368.9780.72101.35 85.0457.89
2013 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1st Estimate ($/MWh) 37.71 57.28 43.74 56.43 51.31 64.11 73.76 40.13 87.18 58.12 62.28 76.07
2nd Estimate (M$) 623.6 516.7 559.7 564.1 627.6 719.9 593.7 721.5 666.7 641.1 884.4 603.0
2nd Estimate ($/MWh) 50.65 45.62 49.78 54.55 66.36 79.12 45.40 68.99 63.08 63.63 84.89 42.69
2012 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1st Estimate ($/MWh) 42.77 49.06 48.50 74.68 55.29 53.36 51.23 37.77 3.8.30 53.44 47.72 49.36
2nd Estimate (M$) 520.2 548 675.2 586.8 582.2 572.5 599 486.1 460 542.3 588.2 472.7
2nd Estimate ($/MWh) 42.97 50.43 62.13 60.49 58.01 54.22 43.59 28.94 49.49 52.02 55.68 39.46
 2011 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1st Estimate ($/MWh) 28.84 42.13 37.11 39.30 43.01 47.14 38.71 26.57 44.55 38.62 37.85 47.08
2nd Estimate (M$) 485.3 406.3 438.9 386.0 496.1 422.9 390.3 420.4 387.7 461.2 456.5 541.4
2nd Estimate ($/MWh) 37.74 35.83 35.68 42.99 49.94 40.93 30.75 36.35 39.11 45.59 44.71 45.72
Note: Positive amount denotes a charge to the consumer.
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Posted Estimated Global Adjustment ($/MWh) for 2005-2010

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 28.42 26.75 39.82 36.48 25.20 25.75 8.71 13.30 29.36 41.39 35.51 33.27
2009 5.23 12.76 27.64 37.87 31.04 37.73 41.73 32.02 39.69 34.36 40.89 30.99
2008 8.65 3.48 1.22 5.78 15.71 -0.50 3.25 7.22 2.80 7.93 3.93 13.37
2007 6.83 -5.45 -0.38 4.67 10.42 6.57 6.35 0.21 4.90 3.44 6.76 4.56
2006 -2.50 2.00 1.85 6.26 3.10 1.88 1.40 -0.65 13.15 10.07 3.85 10.60
2005 1.40 2.80 2.00 -5.70 -2.10 -6.20 -11.50 -16.00 -20.00 -13.20 -2.80 -19.83
Note: Positive amount denotes a charge as per IESO settlement. Return to Top

Fixed Global Adjustment ($/MWh) for Distributor Billing for 2005-2010*

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
2010 30.00 32.80 26.30 45.70 34.10 21.20 24.40 5.70 13.60 28.90 39.90 32.30
2009 12.10 5.20 9.50 30.20 39.80 27.90 35.00 43.30 33.60 41.30 33.00 38.00
2008 4.05 9.10 3.60 1.40 5.45 14.40 -0.25 3.50 7.80 2.90 7.80 3.90
2007 10.15 6.95 -5.65 -0.50 4.60 9.75 6.10 6.20 0.25 5.00 3.30 6.30
2006 -14.50 -3.50 2.00 4.00 6.50 3.00 2.00 2.30 -1.00 13.00 9.75 3.85
2005 -0.10 -0.10 -0.10 -0.10 -0.10 -0.10 -6.00 -12.50 -17.00 -20.00 -15.50 -2.50

*Previously, the government set the preliminary daily GA rate on a monthly basis.

Note: Positive amount denotes a charge to the consumer.

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