Commercial property: no form to file, and a reform that cut both ways
Every other article in this guide ends in a form. This one cannot, and saying so early saves a commercial owner the search. What is left is two levers, one threshold, and a pivot point that decided whether the reform helped you or cost you.
The short version
There is no application on the commercial side. No homestead, no rental claim, no election of any kind. Every other article in this guide ends in a form; this one cannot, and it is better to know that now than to go looking.
Commercial and industrial property takes 1.5% up to $2,274,000 of market value, and 1.9% above it. The two levers a commercial owner does have are the ones every class four owner has: market value and classification.
The rate, and where the threshold comes from
Commercial and industrial property sits in class four alongside housing — see what class four is — but takes its own subsection:
“(i) for the market value less than 6 times the median commercial and industrial value, 1.5%; and (ii) for the market value 6 times the median commercial and industrial value or greater, 1.9%.”
The department recalculates the median commercial and industrial value every two years with reappraisal under MCA 15-7-111. For the current cycle it is $379,000, which puts the six-times threshold at $2,274,000. That figure is not a guess — it is the number the Department of Revenue printed in its own letters to commercial owners.
What is genuinely unsettled above the threshold
Whether a parcel above $2,274,000 pays 1.9% on the excess only, or on its whole market value, is not settled.
The statutory wording reads like the whole value flips. But the department describes the break as a lower rate on “the first $2,274,000of a commercial property’s market value,” and the identically-constructed residential subsection is demonstrably applied band by band rather than as a lookup.
On a $3,000,000 parcel the two readings differ by $9,096 of taxable value — $47,904 against $57,000. That is a real gap, and anyone quoting you a confident answer for a parcel above the threshold should be able to show you a bill. Options include comparing the taxable value on your own notice against both computations, which settles it for your parcel in about a minute.
HB 231 moved commercial in both directions
Nearly every summary of the reform reports a single direction for commercial. That is wrong, and it is wrong in a way that depends on the size of the parcel.
In 2025 the commercial rate was not flat. The effective rate rose with market value: smaller parcels sat at a base of 1.4%, and larger ones paid progressively more than that — in some cases well above today’s 1.5%. Flattening everything below the threshold to a single 1.5% therefore raised the small end and lowered the large end at the same time.
| Roughly where the parcel sits | What TY2026 did |
|---|---|
| Under about $505,000 of market value | Taxable value ROSE — about 7.14% at the bottom of the range |
| Above about $505,000 | Taxable value FELL, and the larger the parcel the bigger the cut |
So a $300,000 shop and a $3,000,000 building had opposite experiences of the same reform. If you own several commercial parcels of different sizes, expect the notices to disagree with each other — that is the schedule working as written, not an error in one of them.
Where that finding comes from
The 2025 schedule is reconstructed from observed taxable values, not read from that year’s statute. It reproduces every parcel it was tested against to within a few dollars, which is enough to describe what happened and where it pivoted. It is not enough to compute a 2025 bill from, and we do not use it that way.
What a commercial owner can actually do
Market value
The larger lever, and for income-producing property the argument is usually an income approach built from real rents, vacancy, expenses and a market capitalisation rate — tied to the valuation date rather than to today.
Classification
Whether the parcel is commercial at all. A genuine classification error is correctable under MCA 15-8-601 whenever it is found, with no open appeal window needed.
The threshold is per parcel
It applies parcel by parcel, not per owner and not per business. Combining adjoining parcels can carry value across $2,274,000; keeping them separate can hold it below.
Equipment is a different class
Business equipment is class eight, not class four, with its own exemption and its own reporting. Nothing on this page applies to it.
Two kinds of property pay half
Under MCA 15-6-134, golf courses of at least nine holes and 700 lineal yards, and shooting ranges operated by a qualifying nonprofit, are taxed at one-half the commercial rate — 0.75% below the threshold. If you operate either and your notice shows the full rate, that is worth raising.
Before the next cycle
Both the median commercial and industrial value and the threshold reset at the June 2027 reappraisal, so a parcel sitting just under $2,274,000 today may not be under the new one. A parcel near the threshold is the one worth watching when those notices go out.
Options include checking your taxable value against the rates above, reviewing the classification if the parcel’s use has changed, or having the notice reviewed before the next values are set.
Related
- Your house and a warehouse are in the same tax class
Montana sorts property into seventeen classes, and class four is the default bucket holding nearly every house, cabin, rental, shop and lot in the state. What it covers, what escapes it, why classification follows use rather than owner, and the one class change that is usually worth more than any rate argument.
- How a Montana taxable value is actually built
Market value, classification, statutory rate, mills, bill. Five steps from a building to a tax bill — and only the first two can ever be contested. Worked through with the graduated bands, and how to tell a rate change from a value change.
- Your taxable value went up. Here is what actually changed.
Montana taxable values jumped for 2026 and most of it is not an error. HB 231 made the reduced rates opt-in: the 0.76% rate that used to apply to everyone now requires an application. What changed, what you can still do, and what is not worth fighting.
Where your own parcel stands
The rate check is free and takes about ten seconds — look up any Montana property and see which rate applies, which reduced rate it could qualify for, and the gap between them. No email required. If you would rather someone went through the whole notice, that is what we do.
Rates, deadlines and statutory citations verified against MCA Title 15 as of September 17, 2026. The median residential value ($386,000) and median commercial value ($379,000) are recalculated every two years with reappraisal — the next reset is in 2027. Up The Creek Research LLC is a public-records research firm, not a law firm, an accounting firm or an appraisal firm; this page explains what the statute provides and is not advice about your particular situation. See our Disclaimer & Terms.