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Featured Reports
Provides Ontario's hourly electricity requirements for today, as well as the next 34 days.
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29 Sep | 30 Sep | 01 Oct | 02 Oct | 03 Oct | 04 Oct | 05 Oct |
06 Oct | 07 Oct | 08 Oct |
The Hourly Generator Energy Output and Capability Report presents the energy output and capability for generating facilities in the IESO-administered energy market with a maximum output capability of 20 MW or more. For variable generation only, forecast values are published instead of capability, as this provides a more accurate view of how much energy these units could be expected to produce.
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05 Aug | 06 Aug | 07 Aug | 08 Aug | 09 Aug | 10 Aug | |
11 Aug | 12 Aug | 13 Aug | 14 Aug | 15 Aug | 16 Aug | 17 Aug |
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | 31 Aug |
01 Sep | 02 Sep | 03 Sep | 04 Sep |
RELATED HISTORICAL REPORTS
Monthly generator output and capability data (updated daily).
Most Recent: csv Report Range: May 2019-present
Hourly generator output and capability data from 2010 to April 2019.
GOC-2010 | GOC-2011 | GOC-2012 | GOC-2013 | GOC-2014 | GOC-2015 |
GOC-2016 | GOC-2017 | GOC-2018 | GOC-2019 (Jan-Apr) |
In the IESO-administered market, the Hourly Ontario Energy Price (HOEP) is charged to local distribution companies (LDCs), other non-dispatchable loads and paid to self-scheduling generators. Businesses that use more than 250,000 kWh a year pay the hourly price. The HOEP is also the basis for regulated rates charged to residential and small business customers. The HOEP values are reported as $/MWh.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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05 Aug | 06 Aug | 07 Aug | 08 Aug | 09 Aug | 10 Aug | |
11 Aug | 12 Aug | 13 Aug | 14 Aug | 15 Aug | 16 Aug | 17 Aug |
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | 31 Aug |
01 Sep | 02 Sep | 03 Sep | 04 Sep |
RELATED HISTORICAL REPORTS
This report provides hourly values for:
- HOEP
- Forecasted price for one, two and three hours ahead
- Operating reserve for 10-minute synchronized, 10-minute non-synchronized, and 30 minutes
The hourly operating reserve prices are only available for 2018 forward. Daily operating reserve prices can be found under the Realtime Market Price Report.
Most Recent: csv Report Range: 2002-present
HOEP Monthly Averages, 2002-Present
The monthly average Hourly Ontario Energy Price (HOEP) since May 2002. The types of HOEP averages include arithmetic, weighted, arithmetic on peak, arithmetic off peak, weighted on peak, and weighted off peak.
HOEP Monthly Averages ¢/kWh
The monthly average Hourly Ontario Energy Price (HOEP) reported in ¢/kWh from May 2002 to 2020. Values for 2021 can be found here.
The Intertie Schedule and Flow report shows imports and exports scheduled at each of Ontario's 14 interconnections with neighbouring jurisdictions. The reports also display the actual power flows captured by operational meters, which help identify issues of congestion and loop flow. Hovering over the average hourly flow values will reveal the 5-minute flow data.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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05 Aug | 06 Aug | 07 Aug | 08 Aug | 09 Aug | 10 Aug | |
11 Aug | 12 Aug | 13 Aug | 14 Aug | 15 Aug | 16 Aug | 17 Aug |
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | 31 Aug |
01 Sep | 02 Sep | 03 Sep | 04 Sep |
RELATED HISTORICAL REPORTS
This report provides hourly import and export scheduled transactions and flows of energy between each of Ontario's 14 interconnections.
Most Recent: csv Report Range: 2018-present
Hourly intertie schedule and flow data from 2010 to 2017. Available in .xlsx download only.
ISF-2010 | ISF-2011 | ISF-2012 | ISF-2013 | ISF-2014 | ISF-2015 |
ISF-2016 | ISF-2017 |
Hourly Import Export Schedule, 2002-2017
Ontario imports and exports for each hour of the day, since May 1, 2002 to the end of last year.
This report provides the total energy and operating reserve scheduled, and Ontario demand, as established by the constrained run of the IESO's Dispatch Scheduling and Optimization (DSO) algorithm.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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05 Aug | 06 Aug | 07 Aug | 08 Aug | 09 Aug | 10 Aug | |
11 Aug | 12 Aug | 13 Aug | 14 Aug | 15 Aug | 16 Aug | 17 Aug |
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | 31 Aug |
01 Sep | 02 Sep | 03 Sep | 04 Sep |
RELATED HISTORICAL REPORTS
This report provides Ontario demand and Market demand for each hour of the day.
Most Recent: csv Report Range: 2002-present
Hourly Ontario and Market Demands, 1994-2002
Ontario demand and market demand for each hour of the day since January 1, 1994 to April 30, 2002. Ontario demand prior to market opening was derived from operational meters and provides the best representation of the hourly load shape in Ontario. Please note that values for Dec 2001 are not available.
Surplus Baseload Generation (SBG) occurs when electricity production from baseload facilities (such as nuclear, hydro and wind) is greater than Ontario demand. These forecasts consider near-term forecasts for hydro-electric and other baseload generation as well as weather conditions which impact demand. The IESO endeavours to provide as much information in advance so that market participants are aware of potential SBG conditions and can plan their businesses and respond appropriately.
SBG forecasts do not include exports. Forecasted exports is, however, also included to provide an indication of the amount of SBG that may be alleviated through exports.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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15 Aug | 16 Aug | 17 Aug | ||||
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | |
01 Sep | 02 Sep | 03 Sep |
Minimum Generation Alerts: When conditions warrant, the IESO will announce a Minimum Generation Alert or Event through an advisory notice and in the SBG Forecasts.
For longer-term forecasts, participants should refer to the current 18-month Outlook which provides an assessment of forecast weekly minimum demands and expected baseload generation for the next year and a half. Participants are advised to refer to the difference between the Weekly Minimum Demand MW and the Baseload Generation MW columns as an indicator of Ontario's exposure to future Surplus Baseload Generation risk.
The Variable Generation Forecast Summary reports shows forecasts of solar and wind generation connected to the grid and embedded within distribution systems for the next 48 hours. Currently all grid-connected as well as embedded generation facilities with installed capacity of 5 MW or greater are required to register with the centralized forecasting service. The reports include total provincial forecasts and in areas where there are at least three facilities in operation, zonal forecasts are also included.
Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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05 Aug | 06 Aug | 07 Aug | 08 Aug | 09 Aug | 10 Aug | |
11 Aug | 12 Aug | 13 Aug | 14 Aug | 15 Aug | 16 Aug | 17 Aug |
18 Aug | 19 Aug | 20 Aug | 21 Aug | 22 Aug | 23 Aug | 24 Aug |
25 Aug | 26 Aug | 27 Aug | 28 Aug | 29 Aug | 30 Aug | 31 Aug |
01 Sep | 02 Sep | 03 Sep | 04 Sep |
Demand
This report provides hourly Ontario electricity consumption, in kWh, for residential and small general service (<50kW) consumers aggregated by forward sortation area (geographical unit based on the first three characters in a Canadian postal code). See report description.
Learn more about how smart meter data can be used to help organizations understand the ways in which electricity is used to develop programs, policies and initiatives that benefit Ontario ratepayers.
Eligible third parties can access more detailed de-identified smart meter data. Learn more.
Report Range: Monthly
This report lists load consumption by sector in the IESO-administered markets based on a general application of the North America Industry Classification System (NAICS).
This report is for general information purposes. Loads are assigned a NAICS category by the IESO based on the general nature of the market participant's business. It does not consider all types of activities at the site or facility. See Report Description.
Report Range: Monthly
HISTORICAL REPORTS
2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 |
2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 |
This report provides the total energy and operating reserve scheduled, and Ontario demand, as established by the constrained run of the IESO's Dispatch Scheduling and Optimization (DSO) algorithm.
Most Recent: xml | csv Report Range: 30 days
RELATED HISTORICAL REPORTS
This report provides Ontario demand and Market demand for each hour of the day.
Most Recent: csv Report Range: 2002-present
Hourly Ontario and Market Demands, 1994-2002
Ontario demand and market demand for each hour of the day since January 1, 1994 to April 30, 2002. Ontario demand prior to market opening was derived from operational meters and provides the best representation of the hourly load shape in Ontario. Please note: data for Dec 2001 is not available.
This report provides the sum of system demand for each trading hour in the reporting month, including the peak trading hour. These measurements form the basis for the IESO's determination of the peak system demand and associated transmission network charges.
Most Recent: html Report Range: Monthly report for one year
This report provides the preliminary system demand for each trading hour in the reporting month, including the peak trading hour. These measurements form the basis for the IESO's determination of the peak system demand and associated transmission network charges.
Most Recent: html Report Range: Monthly report for one year
This report contains hourly zonal demands, derived from operational meters, for the 10 zones in the province. The placement of these meters varies from station to station, and their corresponding readings may, or may not, include station service loads. The hourly zonal demand data provides the best representation of the hourly load shape of the 10 zones in Ontario.
Most Recent: csv Report Range: 2003-present
Supply
In support of the capacity auction (CA), the post-auction report provides, for each obligation period and zone, the capacity auction clearing price, the amount of capacity acquired by obligation type, the successful capacity auction participants that received a capacity obligation, their respective total capacity obligations and surplus enrolled capacity. See the full report description.
Most Recent: xml
In support of the capacity auction (CA), the pre-auction report provides existing and future capacity auction participants with the information needed to enrol their auction capacity, and subsequently submit offers for the capacity auction. See the full report description.
Most Recent: xml
The Dispatch Deviation report summarizes the number of occurrences where the IESO has deviated significantly from the results of the dispatch algorithm, the action taken and the rationale for doing so.
Most Recent: html Report Range: Monthly report for one year
The Hourly Generator Energy Output and Capability Report presents the energy output and capability for generating facilities in the IESO-administered energy market with a maximum output capability of 20 MW or more. For variable generation only, forecast values are published instead of capability, as this provides a more accurate view of how much energy these units could be expected to produce.
Most Recent: xml Report Range: 90 days
RELATED HISTORICAL REPORTS
Monthly generator output and capability data (updated daily).
Most Recent: csv Report Range: 2019
Hourly Generator output and capability data from 2010 to April 2019. Available in .csv download only.
GOC-2010 | GOC-2011 | GOC-2012 | GOC-2013 | GOC-2014 | GOC-2015 |
GOC-2016 | GOC-2017 | GOC-2018 | GOC - 2019 (Jan - Apr) |
This report provides hourly output levels, grouped by fuel type, for generating facilities in the IESO-administered energy market with a maximum output capability of 20 MW or more.
Most Recent: xml Report Range: Daily report
This report provides monthly output levels, grouped by fuel type, for all transmission connected generating facilities, with capacities above and below 20 MW. This report does not include embedded generation.
Most Recent: xml Report Range: Monthly report
This report provides the total energy and operating reserve scheduled, and Ontario demand, as established by the constrained run of the IESO's Dispatch Scheduling and Optimization (DSO) algorithm.
Most Recent: xml | csv Report Range: 30 days
RELATED HISTORICAL REPORTS
This report provides Ontario demand and Market demand for each hour of the day.
Most Recent: csv Report Range: 2002-present
Hourly Ontario and Market Demands, 1994-2002
Ontario demand and market demand for each hour of the day since January 1, 1994 to April 30, 2002. Ontario demand prior to market opening was derived from operational meters and provides the best representation of the hourly load shape in Ontario. Please note: data for Dec 2001 is not available.
The Variable Generation Forecast Summary report shows forecasts of solar and wind generation connected to the grid and embedded within distribution systems for the next 48 hours. Currently all grid-connected as well as embedded generation facilities with installed capacity of 5 MW or greater are required to register with the centralized forecasting service. The reports include total provincial forecasts and in areas where there are at least three facilities in operation, zonal forecasts are also included.
Tie breaking rankings report is randomly generated and is used to help the IESO determine how to dispatch variable generators who have offered at the same price.
Most Recent: xml Report Range: Monthly report for one year
Price
This report provides the 1st estimate, 2nd estimate and actual Global Adjustment (GA) rates for Class B consumers in Ontario for a given month. The first version of the report will include the 1st GA rate estimate for the month; the next version will include the 2nd GA dollars and rate for the month; followed by the third version of the report, adding the Actual GA dollars and rate for the month.
Most Recent: xml Report Range: Monthly report for one year
RELATED HISTORICAL REPORTS
Available in .csv download only
GA ¢/kWh
Global adjustment 1st, 2nd, and actual rates reported in ¢/kWh from January 2011 to December 2023.
Global adjustment 1st, 2nd and actual rates reported in $/MWh from January 2015 to December 2023.
GA by components
Monthly global adjustment components, broken down by fuel type and programs from January 2015 to the present.
GA components plus costs and consumption by customer class
For the period January 2015 to December 2023
GA archive files
GA data is available since its inception in January 2005. Prior to January 1, 2011 the Global Adjustment was called Provincial Benefit.
Global Adjustment Values - 2005-2014
Estimated Global Adjustment - Effective January 1, 2011
Posted Estimated Global Adjustment ($/MWh) for 2005-2010
Fixed Global Adjustment ($/MWh) for Distributor Billing for 2005-2010
In the IESO-administered market, the Hourly Ontario Energy Price (HOEP) is charged to local distribution companies (LDCs), other non-dispatchable loads and paid to self-scheduling generators. Businesses that use more than 250,000 kWh a year pay the hourly price. The HOEP is also the basis for regulated rates charged to residential and small business customers. The HOEP values are reported as $/MWh.
Most Recent: xml | csv Report Range: 90 days
RELATED HISTORICAL REPORTS
This report provides hourly values for:
- HOEP
- Forecasted price for one, two and three hours ahead
- Operating reserve for 10-minute synchronized, 10-minute non-synchronized, and 30 minutes
The hourly operating reserve prices are only available for 2018 forward. Daily operating reserve prices can be found under the Realtime Market Price Report.
Most Recent: csv Report Range: 2002-present
HOEP Monthly Averages, 2002-Present
The monthly average Hourly Ontario Energy Price (HOEP) since May 2002. The types of HOEP averages include arithmetic, weighted, arithmetic on peak, arithmetic off peak, weighted on peak, and weighted off peak.
HOEP Monthly Averages ¢/kWh
The monthly average Hourly Ontario Energy Price (HOEP) reported in ¢/kWh from May 2002 to 2020. The values for 2021 can be found here.
This report provides insight into a subset of hourly and monthly IESO-administered market charges that transpired during a month and is considered to be final status data. For more information, see Report Description.
Report Range: Monthly
This report provides an estimate of the hourly uplift charge, including Intertie Offer Guarantee charge, that will appear on their settlement statements. The hourly uplift charge is used to pay for Operative Reserve, congestion managements settlement credits, intertie offer guarantee payments, and energy losses on the IESO controlled grid.
Most Recent: xml Report Range: 30 days
RELATED HISTORICAL REPORTS
Available in .csv download only
Intertie Offer Guarantee Charges, year-to-date
The hourly intertie offer guarantee charge, final or preliminary.
Intertie Offer Guarantee Charges, 2002-2022
The final hourly intertie offer guarantee charge since May 1, 2002.
Hourly Uplift Charges, year-to-date
The hourly uplift charge per megawatt hour, final or preliminary since the beginning of the year. The uplift charge is used to pay for such items as Operating Reserve, any Congestion Management Settlement Credits owed to dispatchable resources, Intertie Offer Guarantee payments and other incurred hourly costs such as energy losses on the IESO-controlled grid.
Hourly Uplift Charges, 2002-2022
The final hourly uplift charge per megawatt hour, since May 1, 2002 until the end of last year. The uplift charge is used to pay for such items as Operating Reserve, any Congestion Management Settlement Credits owed to dispatchable resources, Intertie Offer Guarantee payments and other incurred hourly costs such as energy losses on the IESO-controlled grid.
Daily Uplift, 2011-present
The daily uplift charge per megawatt hour, final or preliminary since October 13, 2011. The daily uplift charge per megawatt hour, final or preliminary since October 13, 2011. The daily uplift charge is based on charges incurred to commit generators to day-ahead schedules.
Monthly Uplift, year-to-date
The monthly uplift charge per megawatt hour, final or preliminary since the beginning of the year. The uplift charge is used to pay for items such as Black Start Capability, Voltage Support, and Regulation Service.
Monthly Uplift, 2002-2022
The monthly uplift charge per megawatt hour, final or preliminary since May 2002. The uplift charge is used to pay for items such as Black Start Capability, Voltage Support, and Regulation Service.
This report provides participants with consolidated information regarding the components that impact Locational Marginal Price (LMP) calculation. The NISL shadow price is provided for the constrained and unconstrained schedule and is common for all intertie zones. A non-zero value indicates that NISL is binding (limiting) for the future hour(s); a positive value indicates binding of net imports while a negative value indicates binding of net exports. The report also provides the Intertie Congestion Price (ICP) for each intertie zone; a positive ICP value indicates export congestion on the intertie zone, while a negative value indicates import congestion.
This report contains hourly nodal prices for Ontario's 10 zones.
Most Recent: csv Report Range: 2002-present
This report provides market clearing prices (MCP), energy and operating reserves for all zones for each hour of the forecast period.
Most Recent: xml | csv Report Range: 30 days
RELATED HISTORICAL REPORTS
This report provides hourly values for:
- HOEP
- Forecasted price for one, two and three hours ahead
- Operating reserve for 10-minute synchronized, 10-minute non-synchronized, and 30 minutes
The hourly operating reserve prices are only available for 2018 forward. Daily operating reserve prices can be found under the Realtime Market Price Report.
Most Recent: csv Report Range: 2002-present
This report provides the Market Clearing Price (MCP) for energy and operating reserve, for all zones.
Most Recent: xml | csv Report Range: 30 days
RELATED HISTORICAL REPORTS
This report provides a yearly snapshot of MCP for energy and operating reserve, for all zones, from 2010 and a year-to-date report for the current year.
Most Recent: csv Report Range: 2010-present
Daily Operating Reserve Prices, 2002-2017
Daily operating reserve prices for 10-minute synchronized, 10-minute non-synchronized, and 30 minutes, since May 1, 2002 - 2017.
This report contains dispatch Shadow Prices (energy and operating reserve) at selected nodes within Ontario, for each 5-minute interval of the hour.
Please see the help file in the XML reports for a note on the potential occurrence of erroneous shadow prices at certain area reserve nodes.
System Adequacy
Operating Reserve
Transmission
This report contains all transmission outages occurring for the current day.
Most Recent: xml Report Range: Daily report
This report provides a forecast of the transmission transfer capability used to determine the number of transmission rights that will be offered and the maximum number of transmission rights that may be available for the long term auction.
Most Recent: xml Report Range: Based on LT TRA schedule
This report provides a forecast of the transmission transfer capability used to determine the number of transmission rights that will be offered and the maximum number of transmission rights that may be available for the short term auction.
Most Recent: xml Report Range: Based on ST TRA schedule
The Intertie Schedule and Flow report shows imports and exports scheduled at each of Ontario's 14 interconnections with neighbouring jurisdictions. The reports also display the actual power flows captured by operational meters, which help identify issues of congestion and loop flow. Hovering over the average hourly flow values will reveal the five minute flow data.
Most Recent: xml Report Range: 90 days
RELATED HISTORICAL REPORTS
This report provides hourly import and export scheduled transactions and flows of energy between each of Ontario's 14 interconnections.
Most Recent: csv Report Range: 2018-present
Hourly intertie schedule and flow data from 2010 to 2017. Available in .xlsx download only.
ISF-2010 | ISF-2011 | ISF-2012 | ISF-2013 | ISF-2014 | ISF-2015 |
ISF-2016 | ISF-2017 |
Hourly Import Export Schedule, 2002-2017
Ontario imports and exports for each hour of the day, since May 1, 2002 to the end of last year.
This report contains the current and historical loss penalty factors. The loss penalty factors are used to account for the incremental change in system losses as a result of the change in resource output.
This report provides the actual hourly average schedules and flows as a result of scheduled and off market transactions between Ontario and an intertie zone. The report also provides the total transfer capability that was used for determining the maximum import/export market schedules between Ontario and an intertie zone from the last run of the predispatch constrained schedule.
Most Recent: xml Report Range: Monthly report for one year
This report contains future planned transmission outages for the next 30 days.
Most Recent: xml Report Range: Daily report
This report contains future planned transmission outages for the next 2 to 3 months.
Most Recent: xml Report Range: Daily report
This report contains future planned transmission outages for the next 4 to 6 months.
Most Recent: xml Report Range: Daily report
This report contains future planned transmission outages for the next 7 to 24 months.
Most Recent: xml Report Range: Daily report
The intertie failure charge calculation includes the difference between the pre-dispatch and real-time Ontario price during the hour of the failure. This difference is adjusted by a price bias adjustment factor, which compensates for the different methods used to calculate the pre-dispatch and real-time Ontario prices. These price bias adjustment factors are to be used in the settlement charge calculation for the real-time import and export failure charge, as well as the day-ahead linked wheel failure charge.
This report provides the hourly zonal prices for Ontario and each intertie zone determined by the last projected market price (the zonal price from the last run of the forecast market schedule) for energy.
Most Recent: xml Report Range: Monthly report for one year
This post auction sales and price report provides the overall auction results after the 1st TR auction round has been completed. The report identifies the total number of transmission rights awarded and the associated TR market clearing price for a particular path in a TR auction round.
Most Recent: xml Report Range: Based on LT TRA schedule
This post auction sales and price report provides the overall auction results after the 2nd TR auction round has been completed. The report identifies the total number of transmission rights awarded and the associated TR market clearing price for a particular path.
Most Recent: xml Report Range: Based on LT TRA schedule
This post auction sales and price report provides the overall auction results after the TR auction round has been completed. The report identifies the total number of transmission rights awarded and the associated TR market clearing price for a particular path in a TR auction round.
Most Recent: xml Report Range: Based on ST TRA schedule
This report provides notice of the TR market clearing prices for long term TR auction rounds held in the previous 18 months.
Most Recent: xml Report Range: Based on LT TRA schedule
This report provides notice of the TR market clearing prices for short term TR auction rounds held in the previous 18 months.
Most Recent: xml Report Range: Based on ST TRA schedule