The property tax bill a Kalispell seller hands over this October describes the seller's tax. Under Montana's 2025 property tax law, the Montana Department of Revenue says a reduced homestead rate "will remain in effect for that property through the end of the current calendar year, even if ownership changes during the year." After that, the new owner has to submit a 2027 homestead application to keep the reduced rate.
Flathead County mails real property bills in October, with the first half due November 30 and the second half due May 31. So a buyer closing in Kalispell this fall is getting a tax bill, a proration, and maybe an escrow estimate, and all of them reflect how the seller used the house. If the buyer plans to live there full time and enrolls, the change may be small. If the house will be a second home, the seller's reduced rate won't carry into 2027.
The rate is set by the owner's use, and it ends December 31
Since Tax Year 2026, Montana sorts residential property by how it's used. An enrolled primary residence, or a qualifying long-term rental, gets incremental rates: 0.76% on the first $378,000 of market value, 0.90% on the next $378,000, 1.10% on the next $756,000, and 1.90% on anything above $1,512,000. Second homes, short-term rentals, and vacant residential lots pay a flat 1.90%.
To qualify as a homestead under the Department of Revenue's homestead FAQ, the home must be the owner's principal residence for at least seven months a year, the owner must be current on property taxes, and it must be the only residence the owner claims the rate on. Ownership counts too. Individuals and revocable grantor trusts qualify. Homes held by LLCs or irrevocable trusts do not, though they may qualify for the separate long-term rental rate.
Each of those tests is about the owner. So when the deed changes hands, the reduced rate stays on the parcel through year-end as a leftover from the last owner. The department's answer to sellers is short: "The Homestead Reduced Rate expires at the end of the calendar year."
One Kalispell house, two taxable values
The rate doesn't produce the bill directly. It sets the taxable value, and local mills are applied to that number. When the Daily Inter Lake covered Kalispell's budget this July, the city manager priced one mill using a $550,000 home. Run that same $550,000 home through the 2026 rate schedule:
| How the owner uses it | How the rate applies | Taxable value |
|---|---|---|
| Enrolled primary residence | 0.76% of $378,000, plus 0.90% of the remaining $172,000 | $4,420.80 |
| Second home | Flat 1.90% of $550,000 | $10,450.00 |
The second-home taxable value comes out about 2.4 times the homestead figure. Because mills are multiplied against taxable value, a city, county, or school levy hits the second-home version of the same house about 2.4 times as hard. The final dollar amount depends on the mill levies for that parcel's location, and those change every year.
A Whitefish budget discussion this summer shows how that plays out. In August 2026, the Flathead Beacon reported preliminary scenarios for an $862,700 property. Under a five-carryover-mill option, a primary residence's city tax would go up $0.51 and a non-primary property's would go up $448.14. Under a ten-mill option, the increases were $37.76 and $620.10. Those were proposals, not the adopted levy. Still, they show the pattern: the same council vote produces a much bigger change on a second home than on a primary residence.
What the closing statement is built on
In Montana, closings typically split the year's tax by days of ownership. The seller covers January 1 through the closing date, and the buyer covers the rest of the year. A Montana title company's general explainer notes that the current-year proration may be estimated from the prior year's bill. That guidance was written in 2017, before tax rates depended on the owner's use. We haven't found any published Montana guidance on prorating when the seller and buyer qualify differently.
For a closing this fall, the proration probably holds up for 2026. If the seller enrolled, the reduced rate stays on the parcel through December 31, and the buyer's share of 2026 is figured at that rate. The gap shows up later. Lenders, insurers, and the buyer's own budget may all lean on the 2026 bill as a sign of what the house costs to carry. A buyer who won't qualify as a homestead doesn't keep the reduced rate once the seller's enrollment expires. The Department of Revenue's 2026 information page states that second homes aren't eligible for the homestead rate, and in 2026 they were taxed at the flat 1.90%.
It works the other way too. If the seller never enrolled, perhaps because the house was a rental or a second home, the 2026 bill was calculated at 1.90%. A buyer moving in full time could pay less going forward than the seller's bill suggests. You can look up whether a parcel is enrolled by geocode with the state's Homestead Enrollment Verification Tool.
The calendar after a fall closing
For a Kalispell closing in October or November 2026, the dates from the state and the county run like this:
- October 2026: Flathead County mails 2026 real property bills.
- November 30, 2026: First-half payment due.
- January 1, 2027: The prior owner's reduced rate has expired. Refund request forms for overpaid 2026 taxes become available on the state's homestead site.
- March 1, 2027: Deadline to enroll for the 2027 homestead rate. Enrollment opened May 4, 2026.
- May 31, 2027: Second-half payment due. This is also when the refund window closes for qualifying buyers who closed after this year's enrollment deadline.
The refund applies to a narrow situation, and it explains why a fall closing is different from a spring one. If a buyer moves into a home that wasn't enrolled, the department describes a partial refund equal to the difference between the standard rate and the homestead rate. The buyer has to have lived there as a principal residence for at least seven months of the calendar year and paid 2026 taxes in full. Time in a previous home can count toward the seven months if the two stays run back to back. In the department's own examples, a buyer who sells in July and moves into the new home in August qualifies. A buyer who sells in July and moves in during September does not. For someone moving into an unenrolled house this October, the months in the new home alone won't add up to seven in 2026. Eligibility then depends on whether back-to-back occupancy of a previous principal residence and the new one reaches seven months, as in the department's examples. For anyone who doesn't meet that test, enrolling for 2027 is the path to the lower rate.
There's also an inconsistency on the state's own site. The department's FAQ says 2026 enrollment closed March 20, 2026, while its general 2026 information page still lists a March 1 cutoff. The 2027 window is listed in one place, ending March 1, 2027.
Why Flathead felt this harder than the state expected
Lawmakers expected the 2025 tax package to raise bills for some owners. In Flathead County, the number turned out much larger than predicted. Sen. Greg Hertz provided county data to the Daily Montanan, which reported in June 2026 that 11,074 Flathead residential taxpayers saw increases for Tax Year 2025, compared with the Department of Revenue's estimate of 3,220. The median increase among them was 25%.
Tax Year 2025 wasn't even the year the second-home split started. That year used temporary tiers based only on value: 0.76% on the first $400,000, 1.10% up to $1.5 million, and 2.20% above that. Whether the owner lived there made no difference. The Flathead Beacon reported in January 2026 that the bill on one owner-occupied lakefront property in Somers rose about 41% from 2024 to Tax Year 2025. That increase landed on a primary residence. The 2026 bills now arriving add the owner-use split on top of the value tiers.
The levies are changing too. Kalispell's August 17 council agenda included Resolution 6344 to set the FY 2026–27 city mill levy and Resolution 6343 for $4,613,323 in Emergency Responder Levy revenue. Kalispell Public Schools adopted a $92.8 million budget for 2026–27, and district officials told the Daily Inter Lake that HB 156 moves school BASE funding to a countywide levy, with the effect on taxpayers still unclear.
The rules may also change. A challenge to SB 542, brought by Hertz, Sen. Tom McGillvray, and former Kalispell senator Keith Regier, argues that the bill was passed in violation of constitutional procedure. On March 31, 2026, the Montana Supreme Court declined to take the case directly. As of the most recent reporting we found, from June 2026, it was still pending in Gallatin County District Court. Proposed ballot initiatives to cap annual increases at 2% have been dropped. Rep. Llew Jones said the 2027 Legislature would look at adjustments for fixed-income and lower-income owners. No changes had been passed as of that reporting.
A few questions buyers ask
Can a home that's rented out part of the year still qualify? Yes, according to the Department of Revenue, as long as the owner lives there as a principal residence for at least seven months. The department's example is an owner who lives in the home April through December and rents it out January through March.
What if a buyer already claims a homestead in another state? The department says that generally rules out the Montana homestead rate, because an owner can have only one principal residence.
What does enrollment involve? The applicant attests to ownership, use, length of residency, and payment of Montana property taxes. The department warns that a false attestation can lead to loss of the classification and significant legal and financial penalties.
If you're buying or selling in Kalispell this fall, it's worth knowing where your tax numbers come from before you sign. Blayne Larson can go over a parcel's enrollment status, the seller's bill, and the 2027 calendar with you, and help you line up the right questions for your title officer and tax professional. Schedule a free consultation.
This article is general information, not legal, tax or financial advice. Consult a qualified professional about your situation.
