Property tax has brackets too — they're just called classes

Ask anyone who has filed their own return what their top marginal rate is and you'll get an answer. It might be off by a bracket, but they'll have a number, and they'll know it goes up as income does.

Ask the same person what their property tax rate is and the answer is usually a dollar figure — what the bill came to last year — rather than a rate. Ask what rate a shop three doors down pays and you'll get a blank look, because almost nobody knows that it's a different number.

It is. Often two to four times different.

The arithmetic is trivially simple

Property tax is one multiplication:

assessed value × tax rate = annual bill

There are no brackets in the income tax sense, no marginal calculation, no phase-outs. One value, one rate, one answer.

The complication is entirely in the two inputs. The assessed value comes from a provincial assessor, on a valuation cycle you don't control. And the rate — the part this piece is about — isn't one number. Municipalities set a separate rate for each class of property, and the class is determined by what the property is used for.

The classes, using Toronto as a worked example

Toronto's 2026 rates, combining the municipal, education and city building fund portions:

Take a house and a shop on the same street, each assessed at $1,000,000. The house is billed $7,673. The shop is billed $23,020.

That's the number worth carrying around: commercial pays roughly 3× residential on the same dollar of assessed value. Not 3% more. Three times.

If you've only ever paid residential property tax, this is the single most surprising fact about the system. It isn't a surcharge or a business licence bolted on top. It's the base rate.

Why municipalities do it

The rationale is that income-producing property has more capacity to pay, and that shifting burden onto the commercial class keeps residential rates — the politically visible ones — lower. A council that raises the residential rate hears about it at the next election. A council that leans on the commercial class mostly doesn't.

Toronto is not an outlier here. Altus Group's 2023 benchmark report put the average commercial-to-residential ratio across 11 major Canadian cities at 2.82, with six of the eleven taxing commercial property at more than three times the residential rate — Montreal at 4.33, Quebec City at 3.53, Vancouver at 3.37, Calgary at 3.36 and Toronto at 3.26, against Edmonton at 2.59, Ottawa at 2.42 and Winnipeg at 1.93. The pattern holds nationally; only the size of the multiple moves. (Toronto's own ratio has drifted down since that survey — the 2026 rates above work out to 3.0 — which is council policy, not a data error.)

The trade-off lands hardest on a specific person: the small business owner who owns her premises rather than renting them. She's paying an income-producing-asset rate on a building that produces a modest income. A dentist's office and a bank tower sit in the same class.

One policy answer, and why Toronto's is unusually visible

Municipalities have responded to that with reduced rates for small commercial property. The mechanisms vary — some by application, some by assessment characteristics, some not at all.

Toronto's is worth looking at not because the discount is unusually large but because the administration is unusually legible. The City takes 20% off every component of the commercial rate for properties in a small business subclass, with the Province matching on the education portion — 2.301986% becomes 1.841589%. On that same $1,000,000 shop, the bill drops from $23,020 to $18,416.

Eligibility runs on assessed value, property class, location and lot size. And rather than running an application process, the City determines eligibility itself and publishes the list — 28,222 properties on the list published 2 January 2026.

Which puts an interesting number in public view. In most places, "how much relief does small commercial property actually get, and how many properties get it" is a question you'd have to FOI. Here it's a published file.

The corollary is that the failure mode is silent. There's no rejection letter for a form you never filed — if the City's determination missed you, nothing arrives to tell you so.

The other input: assessment cycles vary more than you'd think

A rate is only half the bill, and the half people compare across cities is usually the wrong half.

Ontario is the extreme case. Every current assessed value in the province still uses a 1 January 2016 valuation date. The reassessment cycle was paused and has not restarted, so a 2026 Ontario tax bill rests on a decade-old view of the market. British Columbia, by contrast, reassesses annually, with a valuation date the previous July.

So a headline rate comparison between Toronto and Vancouver isn't comparing like with like: one is a rate applied to a 2016 value, the other a rate applied to a value from last summer. A low rate on a current value and a higher rate on a stale one can land in the same place.

The new tools, for Toronto addresses

Both halves of this are now calculators on our sibling site rather than arithmetic you do yourself:

• The property tax calculator takes an assessed value and a class and returns the annual bill, with every 2026 Toronto class in one table — residential, multi-residential, new multi-residential, commercial, industrial and the small business subclass — each broken into its City, education and city building fund components. It's the fastest way to see the 3× multiple applied to a number you care about instead of a round $1M.
• The small business subclass checker answers the question the published list makes answerable: enter a commercial address and its assessed value, and it reports whether that address is on the City's eligibility list and what the 20% cut is worth in dollars. Given that the failure mode is silent, this is the check worth running if you own commercial premises in Toronto and have never heard of the subclass.

What this means if you're doing the sums

Three things determine a property tax bill, and only one of them is the number people quote:

1. The assessed value, from a provincial assessor, on a cycle that varies by province and may be badly out of date.
2. The class, determined by use — and worth two to four times more than most people assume.
3. Any subclass or relief programme your municipality operates, which may apply automatically or may require an application.

If you're weighing buying commercial premises rather than leasing, the class multiple is not a rounding error in the carrying costs. On a $1M property in a city with a 3× ratio, it's the difference between roughly $7,700 and roughly $23,000 a year — before you've compared it against the rent you'd have paid.

A caveat that matters: rates, classes and relief programmes are municipal. Toronto is a worked example here, not a national rule, and the figures above are Toronto's own 2026 rates. Your municipality sets its own, publishes them annually, and they will not match these. For anywhere outside Toronto: find your municipality's current rate table, find the row for your property's class, and do the one multiplication. The hard part was never the arithmetic.

Toronto property tax rates, the small business subclass and its eligibility list from PropertyMonitor.TO (City of Toronto open data; list published 2 January 2026). Commercial-to-residential ratios from Altus Group's Canadian Property Tax Rate Benchmark Report, 2023. Income and affordability figures delivered by Metrestick.