The property landscape in Ontario is constantly changing. Last year, the Municipal Property Assessment Corporation (MPAC) added more than $42.7 billion in new assessment, with commercial and industrial properties making more than $5.7 billion of the total. 

As part of its extensive data collection program, MPAC annually collects information from income-generating properties. Our annual Property Income and Expense Return initiative requests information from over 35,000 eligible properties in Ontario, including commercial and industrial properties, golf courses, hotels, motels, mixed-use properties, and multi-residential properties. 

By collecting information annually, MPAC’s income valuation experts can carefully review and monitor trends in revenue, expenses, capital investments, fair market rents, vacancies, and other factors while maintaining accurate property inventories. 

You may be wondering, who is MPAC, and why do they collect this information? MPAC is responsible for establishing and maintaining the assessments for over 5.7 million properties in Ontario. Our role is to accurately assess and classify all properties in Ontario in compliance with the Assessment Act and regulations set by the Government of Ontario. Learn more about MPAC’s Authority to Collect Information.   

The information we collect supports our work to maintain accurate property information, deliver quality assessments, and help us better understand ongoing changes in Ontario’s property landscape. Having complete, accurate, current market and property data is vital to the valuation process. This helps us establish quality assessments and deliver annual assessment rolls to all Ontario municipalities, which are used to distribute municipal taxes required to fund essential community services.

This year, our new property information request letters were mailed to eligible property owners in May 2025. We’ve refreshed our information request letters to streamline how property details, requested information, and submission instructions are displayed, so finding what you need including MPAC AboutMyProperty login credentials is easier and faster than ever. The submission deadline for the campaign is July 14, 2025.

Ensure your property's unique characteristics are accurately reflected

As an Ontario business property owner, you have an important role in providing the information requested by MPAC. Submitting information about your property on time helps ensure the unique details and market conditions for each property are accurately reflected. Property owners are required to comply with MPAC’s information request as outlined in Section 11 of the Assessment Act. 

There are several ways you can submit information to MPAC, including online through MPAC AboutMyProperty™. Alternatively, owners can also share information through mail, email, business-to-business options and other file-sharing solutions.

Submitting information online is as easy as 1-2-3

This year, we’ve made it easier than ever to submit property information through MPAC’s information request portal in MPAC AboutMyProperty. New features in the online portal include: 

• Streamlined navigation: A smoother experience with a user-friendly interface.
• Pre-population: Option to auto-populate your 2024 submission if available, saving you time and effort.
• New summary tab: High-level overview of your data inputs before submitting.
• View previous submissions: Access and view your previous submissions for added convenience. 

All submissions to MPAC are handled through a secure system, with measures in place to protect sensitive financial and proprietary information. This is done in compliance with the Assessment Act, the Municipal Freedom of Information and Protection of Privacy Act, and the Municipal Property Assessment Corporation Act. 

Commitment to customer experience

We understand the demands on today’s business property owners, that’s why the 2025 enhancements to the information request portal within AboutMyProperty are focused on improving the customer experience to provide a more efficient submission process.

MPAC is dedicated to collaborating with and supporting industry partners across the province. For additional information about the information request program, including frequently asked questions and an informative video, visit mpac.ca/AIR . Industry associations looking for resources to support their members can reference Working with Industry Partners. Subscribe to MPAC’s Industry Insights newsletter to receive relevant and informative updates every quarter. 

We value feedback from property owners about their experience with the online submission process. After completing your submission, we encourage you to take our quick exit survey.

If you’re an eligible business property owner in Ontario, we encourage you to take advantage of the new enhancements made for you. Submit your property information through our newly designed portal in MPAC AboutMyProperty before July 14, 2025, and ensure your property data is current and accurate.