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Source verified July 1, 2026
Retrofit Program — Prescriptive Stream
Energy-efficiency incentives for Ontario businesses
Latest source updateLast Update: June 29, 2026Latest change: The Retrofit Prescriptive Stream now shows Spring 2026 changes, including new effective dates, measure updates, and incentive adjustments.View change
Latest source update
Last Update: June 29, 2026
Latest change: The Retrofit Prescriptive Stream now shows Spring 2026 changes, including new effective dates, measure updates, and incentive adjustments.
Retrofit Prescriptive Stream updated for Spring 2026
The Retrofit Prescriptive Stream now includes Spring 2026 program updates with changes effective May 29, 2026 and June 30, 2026. The update splits Prescriptive Packaged Terminal Heat Pump measures into two tiers, removes eligibility for wall-mounted Solar DERs, and adds a new Prescriptive Clean Water Pump measure offering $15/HP. Several incentive values were also updated effective June 30, 2026: Small-to-Medium Generation Solar DER changed from $860/kW to $770/kW-AC, LED Grow Lights for Vegetables changed from $200/fixture at $0.15/kWh to $180/fixture at $0.13/kWh, and Cannabis Warehouses changed from $200/fixture to $180/fixture. Horticultural Lighting Controls and Network Lighting Controls changed from $0.35/kWh to $0.30/kWh, and the Solar PV worksheet now asks applicants to enter tilt angle directly.
Funding available
$ 500 - $ 250,000
Deadline
June 30, 2026
Location
Ontario, Canada
Who can apply
Owners and operators of industrial, commercial, institutional and multi-family residential buildings
See full eligibility
Overview
The Retrofit Program supports Ontario businesses and other eligible participants with energy-efficiency upgrades through Prescriptive and Custom incentives. It covers projects such as HVAC, lighting controls, solar PV systems, data centre equipment, and industrial EMIS measures.
Find open grants for your business
Explore open funding programs that match your business and project.
At a glance
Funding available
Financing goals
- Implement environmental initiatives
- Increase operational productivity
- Optimize production processes
Eligible Funding
- Maximum amount : 250,000 $
- Minimum amount : 500 $
- Up to 50% of project cost
Funds Providers
Eligible candidates
Eligible Industries
- All industries
Location
- Ontario
Legal structures
- For-profit business
Annual revenue
- All revenue ranges
Organisation size
- All organization sizes
Audience
- All groups
Next Steps
1
Determine your project
2
Validate your eligibility
Activities funded
- Energy-efficiency upgrades that reduce electricity consumption
- Prescriptive Measures
- Custom Measures
- Distributed Energy Resource Measures
- Energy Management Information System Measures
Documents Needed
- Program Requirements
- Participant Agreement
- Participant Confirmation Form: Equipment Disposal and Decommissioning
- Custom Project Worksheet
- Solar PV DER Worksheet
Official resources
Program guide
Application form
Eligibility
Who is eligible?
- Owners and operators of industrial, commercial, institutional and multi-family residential buildings
- Persons with the rights and authority to have the Measures installed
- Social Housing Providers for the Social Housing Adder or SHP Advance Incentive
Eligible expenses
- Costs of the equipment purchased
- Costs of labour for equipment installed by a third party
- Costs of energy audits not funded by the IESO
- Costs of design, engineering and/or architecture
- Third party project management costs
Ineligible Costs and Activities
- Costs of the Participant's labour, service, administration or overhead that are not incurred by a third party
- Financing costs including, but not limited to, costs associated with financing, leasing and lease-to-own procurement arrangements and such other financing costs associated with leasing or borrowing capital
- Insurance costs
- Costs associated with post-installation work related to equipment maintenance or repair
- HST
Eligible geographic areas
- Ontario
Selection criteria
- The IESO would like to thank you for your submissions. Each measure submitted for consideration to the Save on Energy Retrofit program is reviewed and screened.
- The evaluation of the submissions involves an in-depth, multi-stage review and approval process to ensure a measure addresses market needs and meets program requirements, including cost-effectiveness, and energy-efficiency policy objectives.
How to apply
- Applications are submitted through the Retrofit portal.
- Please upload your invoice to the Retrofit portal.
- You can check out this brief video “Submitting a Final Invoice” for steps on how to upload your invoice.
Processing and Agreement
- Once your application has been submitted it will be assigned to a technical reviewer.
- The pre-approval process will take about two to three weeks to complete.
- During this time, you will receive either a formal notice via the Retrofit portal and/or your Save on Energy representative that your project has been pre-approved, or your technical reviewer may notify you that your application requires further documentary evidence to support the application.
- Mandatory QA/QC is required for projects that exceed $20,000 in incentive value.
- Some applications for small projects that fall under these incentive amounts may be selected at random for QA/QC during the pre-approval and/or post-approval process.
Additional information
- Applications are submitted through the Retrofit Portal.
- Retrofit program applications for lighting measures that have been submitted for pre-approval prior to or on December 17, 2023, and receive pre-approval by December 31, 2024 will continue to be eligible to receive the Retrofit program incentive after program requirements are met.
- Participants may choose either the Retrofit program or the Instant Discounts program, but not both for the same project.
- If you had an existing account in the previous system, you must reactivate your account using the same email address used for your previous account.
Contacts
Other components of this program
Explore related funding streams and grants that belong to the same program.
- Retrofit Program - Agriculture IncentivesEnergy-saving upgrade incentives for Ontario businesses
- Retrofit Program: Custom StreamEnergy-efficiency incentives for Ontario businesses
- Save on Energy Retrofit Program – Greenhouse Distributed Energy Resources (DERs) Incentives (Southwest Region)Incentives for greenhouse energy storage projects
- Solar Photovoltaic (PV) incentivesFunding for energy-saving retrofit upgrades
Frequently Asked Questions about the Retrofit Program — Prescriptive Stream Program
What is the Retrofit Program — Prescriptive Stream?
The Retrofit Program supports Ontario businesses and other eligible participants with energy-efficiency upgrades through Prescriptive and Custom incentives. It covers projects such as HVAC, lighting controls, solar PV systems, data centre equipment, and industrial EMIS measures.
How much funding can be received?
Retrofit Program — Prescriptive Stream Funds up to 50% of admissible expenses, capped at $250,000 per project.
Who is eligible for the Retrofit Program — Prescriptive Stream program?
To be eligible for the Retrofit Program — Prescriptive Stream program, you must:
The participant must be a Non-Residential Customer or Recognized Farm Operation.
The participant must not have previously entered into a binding commitment to acquire the Measures or services required to install the Measures, unless the IESO waives this requirement in the stated circumstances.
A project must be completed, and receive Participant Incentive Invoice Approval by the applicable Participant Incentive Invoice Approval Deadline.
What expenses are eligible under Retrofit Program — Prescriptive Stream?
Energy-efficiency upgrades that reduce electricity consumption
Prescriptive Measures
Custom Measures
Distributed Energy Resource Measures
Energy Management Information System Measures
Who can I contact for more information about the Retrofit Program — Prescriptive Stream?
You can contact Save on Energy (SOE) by email at retrofit@ieso.ca or by phone at 1-844-303-5542.
Where is the Retrofit Program — Prescriptive Stream available?
The Retrofit Program — Prescriptive Stream program is available the province of Ontario.
Is the Retrofit Program — Prescriptive Stream a grant, loan, or tax credit?
Retrofit Program — Prescriptive Stream is a Grant and Funding