Second Homes and Short-Term Rentals Are Taxed at 1.90% in Montana

Montana's 2026 property tax changes were written to favor people who live in their houses. The corollary, which got much less coverage, is that everyone else pays the top rate.

Second homes, short-term rentals and vacant residential lots are taxed at a flat 1.90% of market value. No tiers, no relief, no bottom band.

If you are buying in Big Sky, Whitefish, around Flathead Lake or in Paradise Valley, this belongs in your payment math before you write an offer, not after your first tax statement.

The rate, and what it applies to

Source: Montana Department of Revenue, 2026 Tax Information for Montana Property Owners. The Department names VRBOs, Airbnbs and cabins explicitly in the flat-rate category.

The same house, two ways

Take a $1,200,000 home. The class rate is state law, so this comparison holds regardless of which county it sits in.

As a qualifying primary residence, the tiers are marginal, each band of value taxed at its own rate:

• $378,000 × 0.76% = $2,872.80
• $378,000 × 0.90% = $3,402.00
• $444,000 × 1.10% = $4,884.00
• Taxable value: $11,158.80

As a second home or short-term rental:

• $1,200,000 × 1.90% = $22,800.00

[keyfact] At $1,200,000 of market value, a second home carries roughly 2.04 times the taxable value of the same house as a qualifying primary residence: $22,800 versus $11,158.80. Whatever mill levy the county applies, it applies to that larger base, so the ratio carries straight through to the bill. [/keyfact]

Your actual dollar bill depends on your local mill levy, which varies by county and district and which I am not going to guess at. Pull your total mills from the county treasurer's statement for the specific parcel. The mechanics are in Montana's tiered property tax rates and what they do to your payment.

What you can rely on without knowing the mills is the ratio. Roughly double the tax, forever, for the same house.

Where this actually bites

The Montana second-home markets are also the expensive ones, which compounds the problem.

In Big Sky, where a large share of transactions are second homes and a meaningful share are rented nightly, essentially none of the tiered relief applies to the typical buyer. Budget the flat rate from the start. Big Sky market data.

Around Flathead Lake and Whitefish, the pattern is mixed: genuine primary residences alongside a deep second-home and short-term-rental market. Two neighbors with identical houses can have very different bills based purely on classification. Flathead County market data.

In Paradise Valley, add the vacant-lot rule. Buying land now and building in three years means paying 1.90% on the lot for those three years with no tiering.

The vacant lot detail people miss

Vacant residential lots get the flat 1.90% too.

This matters for anyone doing the buy-land-now, build-later plan, which is common in Montana. You carry the flat rate through the holding period, and you carry it through construction. It is a real line item in a three-year build timeline and it is routinely left out of the pro forma.

If you are financing a lot or a build, that carrying cost should be in the model alongside the interest. We cover the financing side under land loans and construction loans.

Short-term rental income is a separate problem

Two things get conflated here, and both cost people deals.

The tax classification is settled: rent it nightly and it is 1.90%, no tiering. That is the Department of Revenue's stated treatment.

Whether the rental income helps you qualify for the loan is an entirely different question with a much less friendly answer. Short-term rental income is not automatically usable as qualifying income. Conventional guidelines generally want a documented history of the income on tax returns, and projected income from a property you have not yet owned is usually worth nothing to an underwriter.

The trap is predictable. A buyer runs the numbers assuming $60,000 of projected nightly-rental revenue offsets the payment, and then discovers that the lender counts none of it while counting all of the payment, all of the higher tax line, and all of the HOA dues. The debt-to-income ratio collapses.

If nightly rental income is central to how a purchase works, say so on the first call. There are lenders and loan structures that will underwrite to the property's income rather than yours (a DSCR-style investor loan is the usual answer), but that is a different product with different pricing, and it has to be chosen up front, not discovered at underwriting.

Occupancy on the loan is not the same as classification for tax

This is the one that generates genuinely serious problems, so it is worth being direct.

Your loan occupancy (primary residence, second home, or investment property) is a representation you make to your lender. It drives your interest rate, your down payment requirement, and your mortgage insurance. Primary residence pricing is the best; investment property is the most expensive.

Your tax classification is a determination the Department of Revenue makes about the property.

They are decided by different parties for different purposes and they can produce different labels. But they are looking at the same underlying facts, and a mismatch is visible.

Where people get in trouble: financing a property as a second home to get better pricing, then listing it on Airbnb. Occupancy misrepresentation on a loan application is mortgage fraud, not a technicality, and the note almost always contains an occupancy covenant with an acceleration clause. Nightly-rental listings are public and searchable.

The correct move is boring. Tell your loan officer exactly what you intend to do with the property, including "I might rent it some weeks." There is a legitimate product for every version of that plan. There is no legitimate version of guessing.

Two other pieces of this puzzle are worth having in hand. How Montana's tiered property tax rates flow into a mortgage payment covers the underlying arithmetic, and the homestead reduced rate and its application deadline explains the filing that separates a primary residence from everything else.

What to do before you write the offer

Get the current tax statement for the specific parcel and note the total mills. Then run the tax line at the flat 1.90% rather than at a primary-residence assumption.

Decide honestly whether it is a second home or a rental, and finance it as what it is.

If short-term rental revenue is load-bearing in your plan, get the financing structure settled before you are under contract.

And if the property is on a lot you will build on, add the carrying cost of 1.90% on the raw land for the full build timeline.

Financing above the conforming limit in these markets is common. See jumbo loans in Montana. If the scenario is unusual, which second-home and short-term-rental purchases frequently are, send us the deal and we will tell you whether it works before you spend money finding out.