Montana's 2026 Property Tax Changes: What Homeowners and Second-Home Owners Need to Know

Montana just made the biggest changes to its residential property tax system since 2009, and they're being phased in across 2025 and 2026. If you own a home, a cabin, a second home, or a short-term rental in Montana, these changes affect your tax bill — in some cases dramatically. Here's a plain-language breakdown of what changed and what it means.

What actually changed

Montana's 69th legislative session passed two major bills (HB 231 and SB 542) that restructured how residential property is taxed. Instead of taxing all residential property at roughly the same rate, the new system splits properties into categories and treats them very differently.

Primary residences and long-term rentals: lower rates

If you own and live in your home as your principal residence for at least seven months of the year — or if you own a property rented long-term — you can qualify for a new reduced "homestead" rate. State projections suggest the average owner-occupied home will see a meaningful reduction over the two-year phase-in.

Importantly, this isn't automatic for everyone. Homeowners generally need to be enrolled. If you claimed the 2024 property tax rebate, you were typically enrolled automatically, but owners who didn't claim it may need to apply with the Montana Department of Revenue. Some mobile-home owners who didn't opt in have already been hit with sharply higher bills — a cautionary tale about making sure you're enrolled.

Second homes, cabins, and short-term rentals: higher rates

This is the big shift. To pay for the cuts on primary residences, the new system moves more of the tax burden onto non-primary properties. Second homes, vacation cabins, and short-term rentals are taxed at a higher flat rate, and the structure is tiered so higher-value properties carry an even larger share.

For higher-value second homes and short-term rentals, the increases are significant. One analysis projected that taxes on second homes and short-term rentals could rise substantially on average once the new structure is fully implemented in 2026, with the steepest increases on properties valued well into the seven figures.

The valuation increase on top of it all

There's a second piece: the tax bills for 2025 and 2026 are based on a new valuation cycle reflecting January 1, 2024 market values. Because Montana home values rose so much between 2022 and 2024, the Department of Revenue estimated an average value increase of around 20% statewide. Higher assessed values can push bills up even where rates fall, depending on local mill levies.

The interaction between new rates, new valuations, and local mill levies means some owners are seeing "tax bill whiplash" — a higher bill one year, lower the next, or vice versa. It's genuinely confusing, and worth reviewing your specific notice carefully.

What this means if you're thinking about selling

For a growing number of Montana owners, these changes are tipping the scales toward selling — especially in a few situations:

• You own a second home or cabin you rarely use. A higher annual tax bill on a property that mostly sits empty changes the math on whether it's worth keeping.
• You run a short-term rental that's gotten less profitable. Between higher property taxes, rising insurance, and changing local STR rules, some owners are deciding to cash out.
• You're on a fixed income and your bill jumped. If you weren't enrolled for the homestead rate, or if your valuation spiked, the increase can be hard to absorb.
• You inherited a non-primary property. An inherited cabin or second home now carries the higher non-primary tax rate, adding holding costs while you decide what to do.

None of this means you should sell — for many owners, holding still makes sense. But if rising costs are pushing you to consider it, it's worth understanding your options.

If selling makes sense, you have choices

You can list a second home or cabin traditionally, though in Montana's resort markets higher-end listings can sit for months. Or you can sell as-is to a cash buyer — which is often appealing for a furnished short-term rental (sell it with the furniture and bookings), an older cabin needing updates, or a property you own from out of state and don't want to travel back to prepare and show.

Bisonkey connects you with one vetted local investor-buyer in your specific Montana market who buys as-is, with no fees or commission, and can close on your timeline. If the 2026 tax changes have you reconsidering a second home, cabin, or rental, you can request a no-obligation offer to see your numbers.

Bottom line

Montana's 2026 property tax overhaul is good news for most full-time residents and a notably higher cost for second homes, cabins, and short-term rentals. If you own a non-primary property — especially in the Flathead, around the lakes, or near the resorts — review your notice, make sure you're classified correctly, and if the rising costs have you thinking about selling, know that a fast, as-is sale is one of your options.