Why Billings Sits on Montana's New Property Tax Line, and Bozeman Doesn't
October 1, 2026
October 1, 2026
Picture a buyer closing on a West End home this fall. The purchase price is $398,000. The appraisal that Yellowstone County uses to set the tax bill comes back at $402,000. On paper, four thousand dollars separates that buyer from a lower tax rate on the next chunk of that value. In most Montana cities, a swing that small would not register. In Billings, it lands the buyer on one side or the other of a line the state legislature drew when it rewrote residential property tax rules for 2026.
That line matters here in a way it does not in most of the state, and the reason has less to do with Billings itself than with where the state chose to put the line in the first place.
Montana's 2025 legislature passed House Bill 231 and Senate Bill 542, which took full effect with 2026 tax bills and replaced the old flat assessment rate with a tiered system. A home enrolled as a primary residence, or as a qualifying long-term rental, gets graduated rates: a lower rate on the first bracket of value and a higher rate on the value above that. A second home or short-term rental skips the tiers entirely and pays a flat 1.90 percent on the whole value. The Montana Department of Revenue built those brackets around an estimated statewide median home value, and depending on which state summary you read, that median lands somewhere between roughly $378,000 and $400,000. Above that first bracket, the rate steps up before topping out at the 1.90 percent flat rate for higher-value homes and all non-homestead property.
Here is the structure as the state has described it for 2026:
State projections built around this structure suggest the average owner-occupied home sees its tax bill fall by roughly 18 percent, long-term rentals by roughly 22 percent, and non-homestead property rise by as much as 68 percent once the law is fully phased in, according to a summary from the law firm Parsons Behle & Latimer that tracked the bill through the 2025 session. Those are statewide averages. They describe what happens to a typical Montana home. They do not describe what happens when a city's own median sits almost on top of the bracket line the state used to build the whole system.
Billings is that city. The median sale price for homes here over the three months ending July 2026 came in at $390,000, up 2.6 percent from the same period the year before. A separate home-value index put the citywide figure at roughly $406,000 as of that same July 2026 window. Both figures sit inside, or within a few thousand dollars of, the same bracket the state used to calibrate its tiers.
That is not true almost anywhere else in Montana. Bozeman's median home value has climbed past $811,000, which means the overwhelming majority of Bozeman sales clear the first bracket by several hundred thousand dollars before a single mill gets applied. Missoula sits in the mid $500,000s, Helena in the mid $400,000s. Those markets have their own reasons to watch this law, mostly around how many homes sit in the flat 1.90 percent non-homestead category. But their typical home does not sit at the fork in the road the way a typical Billings home does.
In a market where the median sale price and the bracket line are this close together, ordinary appraisal variation, not affluence, decides which side of the tier a given buyer lands on. Two nearly identical homes a few blocks apart in the Heights or the West End can post appraisals a few thousand dollars apart and end up paying different marginal rates on their upper slice of value, for reasons that have nothing to do with condition, location, or negotiating skill. That is the quiet consequence of building a statewide bracket around a number that happens to describe Billings almost exactly.
Billings carries one more variable that most Montana cities do not. The city operates under a voter-approved charter dating to 1977 that caps the number of mills the city itself can levy. Billings is one of only two Montana cities with that kind of charter-imposed mill cap. The other is Sunburst, a small town on the Hi-Line.
When state lawmakers were finalizing HB 231's rate cuts, that charter cap turned into a live problem in Helena. A rate cut that reduces taxable value citywide reduces revenue everywhere, but in a city that cannot simply raise its mill rate to backfill the difference the way most Montana municipalities can, the math gets tighter faster. Legislators had to account for a scenario most of the state didn't have to think about: a capped city whose general fund moves in lockstep with whatever the state decides the tax base should be.
For a buyer or seller, this charter detail is not abstract. It sits underneath every future conversation about how Billings funds city services, road maintenance, and public safety once this new tax structure has run for a full budget cycle. A market where the median home sits on the bracket line and the city's own revenue flexibility is capped by a decades-old charter is a market where the tax conversation does not end with this year's bill.
None of this tiered treatment applies automatically. A homeowner has to enroll the property as a primary residence, or as a qualifying long-term rental, through the state's Homestead.mt.gov portal, generally by March 1 each year. Miss that window and the home defaults to the flat 1.90 percent rate regardless of how the owner actually uses it.
Enrollment status does not transfer at closing in the way a buyer might assume. If a seller was enrolled, that reduced rate carries the new owner through the remainder of the calendar year, but the buyer has to file their own enrollment to keep it going into the following tax year. If the seller was never enrolled, whether the home was a rental, a second residence, or simply an oversight, the buyer inherits the higher non-homestead rate for that tax year with no mid-year fix available.
Yellowstone County has already shown how often this step gets missed. Ahead of the standard billing cycle, the county sent out mobile home tax bills early, and county Treasurer Hank Peters reported that 3,346 of roughly 5,800 mobile home parcels in the county were assessed at the higher rate because the owners had not enrolled. More than half of eligible owners in that early batch paid the non-homestead rate simply because the paperwork did not get filed. Mobile homes are a small slice of the county's housing stock, but the enrollment mechanics are identical for any single-family home, and there is no reason to expect the miss rate to look dramatically different once the full county's 2026 bills are out.
For a buyer comparing Billings against Bozeman, Missoula, or Helena on price alone, the sticker comparison misses this piece entirely. The headline appeal of Billings, a median sale price roughly half of Bozeman's, still holds. What changes is that a Billings purchase now comes with a tax outcome that depends on two things a median-price comparison never captures: exactly where the county's appraisal lands relative to the bracket line, and whether the enrollment paperwork gets filed on time by whoever owns the home in a given tax year.
A seller listing a Billings home this year has reason to confirm and disclose their own enrollment status before closing, since a buyer inheriting an unenrolled property takes on a materially higher carrying cost for the rest of that tax year. A buyer closing anywhere near the bracket line has reason to ask what the county's most recent appraisal actually shows, rather than assuming the purchase price and the taxable value are the same number.
Does a seller's homestead enrollment carry over automatically when I buy? Only for the remainder of that calendar year. The buyer must file their own enrollment at Homestead.mt.gov to keep the reduced rate the following year.
What happens if I close on a home whose seller never enrolled? The home is billed at the flat 1.90 percent non-homestead rate for that tax year. There is no mid-year correction once the window has closed.
Does this bracket dynamic matter the same way in Bozeman or Missoula? Not to the same degree. Those markets' median values sit well above the first bracket, so the practical question there is more about the non-homestead flat rate on second homes than about which side of the first tier line a typical primary residence falls on.
Property tax brackets rarely get top billing in a home search, but in a market where the median sale price sits this close to where the state drew its line, the appraisal on a specific address can matter as much as the price on the listing. If you are weighing a purchase or a sale in Billings and want the tax picture worked through before you write an offer or set a list price, Stacie Wells can walk through what a specific property's numbers actually mean.
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