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By Émile Audet
December 8, 2025

How to Apply for the Ontario Innovation Tax Credit: A Step-by-Step Guide

The Ontario Innovation Tax Credit (OITC) provides a refundable tax credit for corporations conducting scientific research and experimental development (SR&ED) in Ontario. This tax credit is designed to encourage innovation and competitiveness by supporting businesses that invest in R&D activities. For corporations looking to optimize their tax strategies while advancing technological development, understanding the application process for the OITC is crucial.

Overview of the Ontario Innovation Tax Credit

The OITC allows qualifying corporations to claim a tax credit on eligible SR&ED expenditures conducted in Ontario. The credit rate is set at 8% for taxation years commencing after May 31, 2016. The credit applies to expenditures such as salaries, equipment, and consulting fees associated with SR&ED projects. For specific examples and the most up-to-date details on credit rates, see the complete program guide.

Eligibility Requirements

To qualify for the OITC, a corporation must:

  • Have a permanent establishment in Ontario.

  • Engage in SR&ED activities in Ontario during the year.

  • Be eligible for the federal investment tax credit under section 127 of the federal Income Tax Act.

  • Not be exempt from corporation income tax.

  • File a scientific research and experimental development expenditures claim using federal form T661.

For complete eligibility requirements, consult the complete program guide.

Required Documents

The following documents are typically required to apply for the OITC:

  • Completed federal form T661 for SR&ED expenditures.

  • Financial statements reflecting eligible expenses.

  • Supporting documentation for SR&ED projects, such as project descriptions and timelines.

Ensure that all documents are accurate and complete to avoid processing delays.

Step-by-Step Application Process

Step 1: Verify Eligibility

Confirm that your corporation meets all eligibility criteria. For detailed criteria, refer to the complete program guide.

Step 2: Prepare Required Documents

Gather and prepare all necessary documentation, ensuring accuracy and completeness.

Step 3: Complete Federal Form T661

Fill out federal form T661, detailing your SR&ED expenditures for the tax year.

Step 4: Submit Your Tax Return

Include your completed form T661 and supporting documents with your corporate tax return.

Step 5: Await Confirmation

After submission, wait for confirmation from the Canada Revenue Agency regarding your tax credit status.

The full application process is outlined in the complete program guide.

Application Timeline

Applications are typically submitted with the annual corporate tax return. Ensure you adhere to the tax return deadlines to avoid penalties or delays.

Tips for a Successful Application

  • Keep detailed records of all SR&ED activities and expenses.

  • Ensure all claims are substantiated with appropriate documentation.

  • Review eligibility requirements annually to adjust your claims as needed.

Common Mistakes to Avoid

  • Incomplete or inaccurate documentation can lead to delays or rejections.

  • Failing to meet the eligibility criteria may result in disqualification.

  • Overlooking deadlines can lead to missed opportunities for claiming the credit.

What Happens After You Apply

Once your application is submitted, the CRA will review your documentation. If approved, the tax credit will be applied to your corporate tax account. If there are issues, you may be contacted for additional information.

Conclusion

Understanding how to apply for the Ontario Innovation Tax Credit can significantly benefit corporations engaged in SR&ED activities. By following the steps outlined and consulting the complete program guide for detailed information, you can effectively maximize your potential tax savings.

About the author

Émile Audet - Canadian grants specialist

Émile Audet

Canadian grants specialist
Working at helloDarwin for some time now, I'm in charge of providing you with the information you need on government aid. Dedicated to helping companies in Quebec and Canada reach their full potential, I write on the helloDarwin blog about the various programs, allowances and funding available to enable organizations to make their digital transformation through access to federal and provincial support.

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