Can you still fix 2026?
For one group the 2026 year is not closed, and the deadline that reopens it falls months after the application deadline everyone is calendaring. For another group it is genuinely closed, and it is worth knowing which you are in.
The short version
If you live in the property: yes, probably. An owner who was eligible for the homestead rate in 2026 but never applied can recover one year — by filing an informal appeal with the department by May 31, 2027.
If it is a rental: no. That recovery is homestead-only. A missed rental year is gone, and the earliest fix is the 2027 claim.
The 2026 application window closed on March 1, 2026, and the bill arriving this fall carries whatever rate was on file then. The letter the department sent in September explaining the change is not an appealable determination — it announced no value and no classification, so there is nothing in it to appeal. All of which makes it sound like 2026 is closed. For one group, it is not.
The homestead recovery
A property owner who was eligible for the homestead reduced tax rate provided for in 15-6-405 but who failed to file an application may file an informal appeal with the department of revenue. The department calculates the difference between property taxes paid and property taxes that would have been due had the owner received the rate in the prior year.
| Who | An owner who met every homestead test and simply did not apply |
| What you get | A refund of the difference in taxes — not a rate change on a closed year |
| How far back | One year. Only one. |
| How | An informal appeal to the Department of Revenue |
| By when | May 31, 2027 |
Read the deadline carefully, because it is the part that gets missed: the statute sets it at May 31 of the year after the year in which you did not receive the rate. For the 2026 tax year that is May 31, 2027 — several months after the March 1, 2027 application deadline for 2027, and easy to file past while assuming the March date was the last word.
Eligible is the operative word
The recovery is for people who qualified and did not file — the property was your principal residence for seven-plus months, owned in your individual name or a grantor revocable trust, and you were current on the taxes. It is not a second chance for someone who did not meet the tests.
So a second home does not qualify, an entity-owned house does not qualify, and a rental does not qualify — for a different reason, below.
Why a rental year cannot be recovered
MCA 15-6-407 names the homestead rate under MCA 15-6-405 and stops there. It does not reach the rental property reduced rate under MCA 15-6-411, and there is no parallel provision that does. This is a real asymmetry rather than an oversight in the drafting, and it cuts the opposite way from the ownership rule — where entity owners can claim the rental rate but never the homestead rate.
| Homestead | Long-term rental | |
|---|---|---|
| Entity-owned property eligible? | No | Yes |
| One-year retroactive recovery? | Yes | No |
| Application deadline | March 1, 2027 | March 1, 2027 |
If you own a rental that has been sitting at 1.9% since January, the only move available is forward: claim for 2027 by March 1, 2027 and the saving lands on the fall 2027 bill.
What else is still open on 2026
A wrong classification — no deadline at all
If the department has the property in the wrong class — commercial ground assessed as residential, or land that should be agricultural — that is correctable under MCA 15-8-601 whenever it is found. No open window is required, and it is frequently resolved without a hearing.
A wrong market value — but only on its own clock
Value is appealable, on a 30-day clock that runs from the date printed on the Classification & Appraisal notice, not from the day you opened the envelope and not from the September letter. If that window has passed for this cycle, the next notice restarts it.
A denied application
A denial has its own ladder under MCA 15-6-418, starting within 30 days of the denial notification — and a separate filing at the county board that, if missed, leaves the board unable to consider your eligibility at all. Different from both tracks above.
Working out which of these you are on
The three tracks get conflated constantly, and filing on the wrong one wastes the window. The quickest way to tell them apart is to look at what moved: a taxable value that jumped on an unchanged market value is a rate story, and the remedies are the claim form and — if you live there and were eligible for 2026 — the May 31, 2027 recovery above. The five steps, and which two can be contested.
Options include checking your enrollment status first at homestead.mt.gov, calling the department field office, or having the notice reviewed before a deadline decides it for you.
Related
- The homestead reduced rate: who qualifies, and how to claim it
The Montana homestead reduced tax rate takes a principal residence off the 1.9% default and onto graduated bands starting at 0.76%. The four tests, the ownership rule that disqualifies LLCs outright, the real application window, and what happens if you miss it.
- 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.
- 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.
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.