Questions about my Assessment
Assessment-related inquiries should be directed to the Municipal Property Assessment Corporation (MPAC) located at:
1401 Michigan Ave., Unit 1, Sarnia, ON
Phone: 1-866-296-MPAC (6722)
TTY: 1-877-889 MPAC (6722)
Fax: 1-866-297-6703

Tax Due Dates

2023 Interim Billing 
Bills mailed the first week of February
1st Installment: February 27, 2023
2nd Installment: April 27, 2023

2023 Final Billing 
Bills mailed the first week of June
3rd Installment: June 29, 2023 (to be confirmed) 
4th Installment: August 30, 2023 (to be confirmed) 

Payment Options

Pre-Authorized Payment Plan – You can sign up for monthly automatic withdrawal, or automatic withdrawal on the tax due date. Please see below for additional information on the plans available. To sign up for a Pre-Authorized Payment Plan, please complete and return an application form.

In person – City Hall is accepting in-person payments cash, cheque or debit. Cash or cheque can be dropped off at City Hall in an envelope through the Drop Box, located just outside the Christina St. entrance. Our business hours are Monday – Friday from 8:30am-4:30pm (excluding Holidays).

Telephone Payments – Using your 19 digit roll number, no spaces, decimals, or dashes. Search Sarnia (City) Taxes or Sarnia Tax to add as a payee.

Online/Internet Payments – Using your 19 digit roll number, no spaces, decimals, or dashes. Search Sarnia (City) Taxes or Sarnia Tax to add as a payee. Please note that we do not accept Interact e-Transfers.

Financial Institution – Payment can be made at most financial institutions. Please allow 2-3 business days for processing.

Post Dated Cheques – Mailed or dropped off and held until due date.

Mail – to Sarnia City Hall, Tax Office, 255 Christina Street North, PO Box 3018, Sarnia Ontario, N7T 7N2 (cheques only).

Drop Box – located at the Christina Street Entrance (cheques only)

Late Payments

Late payment of Taxes will be subject to a penalty charge of 15% per annum, on the first day of default and on the first day of each month thereafter, until paid. Failure to receive a bill does not excuse a taxpayer from the responsibility for payment or from liability for penalty for late payment. Penalty and/or interest cannot be waived or altered for any reason.


A fee of $40 will be applied on all non-sufficient fund (NSF) payments.

If payment in full is not received by the installment due date, a property tax arrears notice will be issued and a $5.00 fee will be applied to your account.

Payment Plan Options

Monthly Plan

  • Runs from November to October. If you join after the plan begins, payments are adjusted accordingly.
  • Payments will be deducted from your bank account on the last business day of each month.
  • Monthly payments are adjusted twice per year, in November and June for Residential and Commercial, after Final Taxes are been determined.
  • A Final Tax Bill will be mailed for information purposes. This bill should be kept for income tax purposes and the information verified.
  • The monthly pre-authorized payment schedule will appear on the Final Tax bill.

Installment Plan

  • Available for all property classes.
  • The Installment amount will be deducted from the designated bank account on each property tax installment due date.
  • Interim and Final tax bills are mailed for information purposes. These bills should be kept for income tax purposes and the information verified.

Please note supplemental bills are not included in pre-authorized payment plans. Property owners are responsible for making the payments themselves. Learn more about supplementary and omitted bills.

Benefits of Enrolling

  • Free to sign up!
  • Never worry about missing an installment due date
  • Avoid penalty charges for missed payments
  • Budgeting for your taxes is made easy with the monthly installment plan
  • No need to mail in a cheque

The Pre-Authorized Payment Plan (PAP) is available, at no cost, to both residential and commercial taxpayers, as long as their tax account has no arrears. To join the PAP program your property structure must be fully assessed.

Contact us at 519-332-0330 ext. 3131 or for details of pre-authorized payment plans available to properties in arrears.

How to sign up for one of the plan options

Complete and return the application form along with a VOID cheque or PAD form from your bank to Customer Service. Application forms are available below or from the Customer Service Centre located on the 1st Floor at Sarnia City Hall.

Line of credit accounts and credit card cheques cannot be used for pre-authorized payments.

  • Pre-authorized payment information is not transferable. When you purchase a new property, a new pre-authorized payment form is required.
  • If you own more than one property, a separate PAP enrollment form is required for each. Any payment default will immediately, at the discretion of the City, cause the account to be removed from the PAP Plan.
  • NSF fees, as well as penalty and interest will apply on all returned payments. It is your responsibility to inform the City in writing, if your bank account information changes.
  • You will be required to supply a new VOID cheque or PAD form from your bank. It is your responsibility to cancel participation in the PAP program in writing if the property is sold.


Pre-Authorized Payment Plan Guidelines
Pre-Authorized Payment Plan Application Form
Pre-Authorized Payment Plan Cancellation or Account Information Change Form

Contact Us

City of Sarnia, Tax Office
255 Christina Street North, PO Box 3018
Sarnia, ON N7T 7N2

Phone: 519-332-0330 ext. 3131
Fax: 519-332-1466