Updated Checked by the Tax-Services.ca editorial team How we check
Windsor property tax comes in two bills a year, and the first one is easy to predict: the city sets the interim bill at 50% of the taxes you paid the year before. For 2026 that bill was due on February 18, March 18 and April 15. The final bill, which carries the rest, is due on July 15, September 16 and November 18. We’re assuming you mean Windsor, Ontario.
How does Windsor split the year into two bills?
Think of it as a deposit and a balance. The interim bill goes out early in the year, before council has finished setting the new rates, so the city takes half of what you paid last year. It also folds in any assessment updates from MPAC, which is the province’s assessment agency.
The final bill lands in June. It shows the full year of municipal and education tax, subtracts what you already paid on the interim, and asks for the balance. That’s why the final is rarely the same size as the interim. New rates and a moved assessment can push it above or below the interim.
| Bill | What it covers | 2026 due dates |
|---|---|---|
| Interim | 50% of 2025 taxes paid | Feb 18, Mar 18, Apr 15 |
| Final, regular plan | Balance of the year | Jul 15, Sep 16, Nov 18 |
| Final, mid-month plan | Same balance, five payments | Jul 15 to Nov 16 |
| Final, end-of-month plan | Same balance, five payments | Jul 31 to Nov 30 |
We haven’t seen the 2027 dates published yet, so check the city’s tax billing page before you plan around them. Many owners set up pre-authorized payments through their bank or the city so a due date can’t slip past in a busy week.
What does a Windsor bill look like in dollars?
The numbers below are made up to show the mechanics. They aren’t Windsor’s actual rate. Say a home is assessed at $300,000 and the combined municipal and education rate is 1.7%, which is 17 mills. The year’s tax is $5,100.
If you paid $4,800 the year before, the interim bill is $2,400, or three payments of $800. The final bill is then $5,100 minus $2,400, which is $2,700, or three payments of $900. You can test your own figures in the property tax calculator: enter the assessed value from your notice and the total rate from your bill.
The maths is easy. What catches people is that the final bill carries the bigger share in a year when rates rise. Set aside a few bucks every pay period, about $425 a month in this example ($5,100 divided by 12), and neither bill will feel like a surprise.
Who sets the rate you pay in Windsor?
Two bodies do. The city sets the municipal part. The province sets the education part, under an Ontario regulation, and it’s the same formula everywhere in the province for homes. Your tax is the assessed value multiplied by the combined rate for your property class.
The value comes from MPAC, and Ontario’s page says assessments still rest on January 1, 2016 values. So a neighbour’s recent sale price won’t change your bill directly. What matters is how your assessment moves compared with the average for your property class. If yours rises less than the average, your share of the city’s total goes down.
What if you think your assessment is wrong?
MPAC lets you file a Request for Reconsideration for free. It covers the value only. MPAC doesn’t control the rate. The quickest route is online through MPAC’s AboutMyProperty service, and you can also mail in the form. The deadline is tied to the notice: MPAC’s notices page gave March 31 of the 2026 property tax year for that cycle, so look at the date on your own notice rather than guessing.
Keep paying the bill while the review runs. A review that goes your way gets adjusted later, but a skipped instalment collects penalties in the meantime.
What happens if you pay a Windsor property tax bill late?
Windsor charges penalties and interest of 1.25% a month once an account is past due, which it says can reach 15% a year. On a missed $900 instalment, one month costs $11.25. That’s small. Three months costs $33.75, and it keeps growing for as long as the balance stays open.
The bigger risk is an account that’s ignored for years. The city describes arrears notices with rising fees, then a tax registration lien once an account is more than three years past due, and a possible sale of the property after a further one-year wait. Nobody should get near that point. If money is tight, the city offers a Tax Repayment Program with terms up to five years, and staff can be reached through 311.
And if you hold the mortgage with a lender that pays your taxes from an account, check the bill anyway. A rise in taxes can change your monthly payment.
Take Dana, who moves into a Windsor house in May. She has no bill history with the city for that address, so the first thing she should do is ask the seller’s lawyer or her own what has been paid and what is still owing on the property. Taxes follow the property, not the person, and an unpaid balance can land on the new owner. Sorting that out on closing day beats a nasty letter in August.
What should you budget before you buy in Windsor?
The annual bill is only one part of owning. If you’re buying, the closing costs calculator shows the cash needed on closing day, and the mortgage payment calculator adds the monthly loan cost. For a condo, the condo ownership cost calculator puts tax beside fees and utilities.
When you’re given a listing price, ask for the current tax bill as well as the estimate in the ad. Last year’s bill is the honest starting point. Then add a cushion, because the rate can move.
Where the numbers come from
The billing dates, the 50% interim rule and the 1.25% monthly penalty come from the City of Windsor’s tax pages, read in September 2026. The assessment and rate rules come from the Government of Ontario and MPAC. The dollar examples are our own arithmetic, and the 1.7% rate is an illustration. Your bill from the city is the only figure that counts.
Frequently asked questions
How much is the Windsor interim tax bill?
The city sets it at 50% of the property taxes you paid in 2025, adjusted for any assessment updates.
When is Windsor property tax due in 2026?
Interim: February 18, March 18 and April 15. Final, regular plan: July 15, September 16 and November 18.
What is the penalty for paying late in Windsor?
The city charges 1.25% per month once an account is past due, which it says can reach 15% a year.
Who decides how much tax I pay on my assessed value?
The city sets its own rate and the province sets the education rate. Your tax is the assessed value times the combined rate.
Can I spread Windsor property tax over more payments?
The city lists pre-authorized plans with five payments on the final bill. Ask the city which plan fits and how to enrol.
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