The Revenue (Tax and Water Billing) office is not open for walk-in visits.  Please call the office (807) 625-2255 to arrange an appointment time if an in-person visit is required.

 Property taxes are calculated using the Current Value Assessment of a property, as determined by the Municipal Property Assessment Corporation (MPAC), and multiplying it by the combined municipal and education rates for the applicable class of property.

To help provide a better understanding of how property taxes are calculated, watch MPAC’s video How Your Property Tax is Calculated.

An interim and final bill is issued each year for every property. Supplemental bills are issued for new buildings, changes in your property's assessed value and other cases. Supplemental bills can be for the current year and up to the last two years.

Balances and updates

Call us for an account balance (807) 625-2255;  Monday - Friday, 8:30 am - 4:30 pm

Property tax reminders

Sign-up to receive property tax reminders by phone, text or email for your tax bills.

Payment options

Payment must be received by the due date to avoid penalty. Please consider processing times (3-5 business days) when making payments through online/telephone banking or by credit card (Plastiq).

  • Pay online, or by telephone banking - Pay your property taxes from your bank account online or by using your touch-tone phone, often with no charge. Thunder Bay property taxes will appear as a registered payee. Your 17 digit roll number is your account number. Search "Thunder Bay and select "property taxes".
  • Automatic Withdrawal PlansSign up for automatic withdrawal from your chequing account. To cancel pre-authorized withdrawals, please contact the City by email at with your name and address of the property.
  • Pay Online with your credit card with Plastiq (additional fee applies) Search "Thunder Bay" and select property taxes. Your 17 digit roll number is your account number.
  • Pay in person at the bank - Payment can be made in person at many Canadian financial institutions. Contact your branch for more information.
  • Leave a Cheque in the Payment Drop-Box at Victoriaville Mall, outside the Civic Centre on the Food Court side.
  • Mail a cheque to: City of Thunder Bay, PO BOX 800, Thunder Bay ON P7C 5K4  (cheque must be received by the due date to avoid penalty)

Tax guides for due dates, classes and more

Supplementary & Omitted Tax Bills

Supplementary and/or omitted assessments are billed separately from the regular billing cycle, and are issued throughout the year.

 Assessment and Billing Process

The Municipal Property Assessment Corporation (MPAC) can provide the City with supplementary and/or omitted assessment values for the current tax year and two years prior when:
  • land is omitted from the assessment roll
  • use of the property changes
  • property is improved due to construction, an addition, or renovation

You will receive a Property Assessment Change Notice from MPAC, informing you of the supplementary and/or omitted assessment value.

Supplementary and/or omitted residential property tax bills are calculated by multiplying the supplementary and/or omitted assessment value by the tax rate for the applicable tax year.

MPAC has authority to assign omitted and/or supplementary assessment for the current year and two years prior.

If you own a new property, the first regular bill you receive from the City may only be for the portion relating to land value. You should expect a supplementary and/or omitted bill for the structure to follow.

Supplementary and/or omitted assessments are issued under the authority of Section 34 and 33 of the Assessment Act. 

Note: if you are currently enrolled in the Monthly Pre-Authorized Tax Payment Program, supplementary and/or omitted tax bills will not be paid from your financial institution account.

Payment must be received by the due date to avoid penalty and interest charges

 Estimate your Supplementary and/or Omitted Tax bill

Assessed values are determined by MPAC. The City cannot project the assessed value for your new property or renovations. In order to set aside funds in anticipation of receiving the supplementary and/or omitted tax bills, you can use the purchase price as a guide.

If you have purchased a new property, made any physical changes to a property or changed the use of your property, it is recommended that you set aside funds in anticipation of supplementary and/or omitted tax bills.

Property Tax Estimate

Use the purchase price as an estimated assessed value and multiply that amount by the applicable year’s tax rate

 Appeal your Supplementary and/or Omitted Assessment

 If you disagree with the information on your Property Assessment Change Notice from the Municipal Property Assessment Corporation (MPAC) you may request a review. The deadline to submit your Request for Reconsideration (RfR) is 120 days from the issuance date printed on the Property Assessment Notice.

It is recommended to pay your supplementary and/or omitted property tax bills as issued, to avoid incurring any penalty/interest.


Apply for tax rebates, adjustments and credits

Learn more on our Discounts and Rebates page.

Other information

Address changes

To update your mailing address complete an address change form and return by mail, fax or email to

Assessment appeals

The Municipal Property Assessment Corporation (MPAC) classifies all properties in Ontario under the Assessment Act and regulations established by the Provincial Government.

You can contact MPAC at (866) 296-6722 to get information on your Property Assessment Notice, verify details about your property or file a free Request for Reconsideration (RfR). The due date to file a RfR with MPAC is printed on your Property Assessment Notice.

The Assessment Review Board (ARB) handles appeals on property assessments and classification. The ARB can be contacted at (416) 212-6349 or toll free at 1(866) 448-2248.

Buying or selling your home

The Property Tax and Water Billing Questions and Answers guide will help you with frequently asked questions when you are buying or selling a home.

Past year tax rates

Past year tax rates are available from the year 2000.

Penalties and charges

All payments must be received by the City by the due date to avoid penalty. Penalties will not be cancelled if you did not receive your bill.

You will be charged a late payment penalty of 1.25% on your outstanding balance if your bill is not paid by the due date and on the first day of every month on any outstanding balance.

The Not Sufficient Funds (NSF) fee is $40.

Tax certificates

Complete a tax certificate form and include payment of $60.00. For more information please call (807) 625-2255.

Tax sale properties

Tenders are invited for the purchase of the lands described below and will be received until 3:00 p.m. local time on Wednesday, June 5th, 2024 at City of Thunder Bay, Revenue Division, City Hall, 500 Donald St E, Thunder Bay, Ontario, P7E 5V3.

The tenders will then be open in public on the same day at 4:45 p.m. local time at the West Arthur Community Centre, 1914 Arthur St West, Thunder Bay, Ontario, P7K 1C7. 

For inquiries, please contact our Collection Officer at (807) 625-2255.

Tax Sale Properties

Property Maps

  1. 643 RED RIVER RD
  6. 126 ROWAND ST
  7. 130 MAY ST S
  8. 814 112TH ST
  9. 113 AMELIA ST W
  10. 1621 EUCLID AVE

If you require a PDF in an accessible format, email our Municipal Accessibility Specialist.

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