Montana's Tiered Property Tax Rates and What They Do to Your Payment

Montana changed how it taxes homes for the 2026 tax year, and the change is genuinely good for most owner-occupants. It is also being described badly almost everywhere, because two different numbers keep getting called "the property tax rate."

They are not the same number and confusing them will make you budget wrong.

The two numbers

The class rate is a percentage set in state law and applied to your home's market value. For 2026 it ranges from 0.76% to 1.90% depending on the type of property and how much it is worth. This is the number in every headline.

Your actual tax bill is a different, larger calculation. The class rate is only the first step.

If you take one thing from this page: 0.76% is not what you pay. It is an input.

The full chain

Montana's Legislative Fiscal Division lays the sequence out as: market value, times the tax rate, produces taxable value, times mill levies divided by 1,000, produces taxes.

Step by step:

1. The Department of Revenue assigns a market value. This is their appraised value, not your purchase price, though a sale is evidence.

2. The class rate converts market value to taxable value. For a qualifying primary residence this is the tiered schedule below. Taxable value is a much smaller number than market value. That is the whole point of the class rate.

3. Your local mill levy is applied to the taxable value. A mill is one-thousandth. Total mills are the sum of everything levied on your parcel: county, city, school districts, and any special districts, plus statewide levies.

4. The county treasurer bills you.

[keyfact] Taxable value = market value × class rate. Tax owed = taxable value × total mills ÷ 1,000. The class rate is state law and identical everywhere in Montana. The mill levy is local and varies substantially by county and district, which is why two identical houses in two counties get different bills. Source: Montana Legislative Fiscal Division, Property Tax 101; 15-6-134, MCA. [/keyfact]

The 2026 tiered rates

For a qualifying primary residence or long-term rental:

Other residential classifications:

Source: Montana Department of Revenue, 2026 Tax Information for Montana Property Owners.

The tiers are marginal, and this matters

This is the single most misreported part of the change, so it is worth being blunt.

The tiers work like federal income tax brackets. Each band of value is taxed at that band's rate. Moving into a higher band does not reprice the value below it.

The Department of Revenue states it directly: the reduced rate follows a tiered, incremental structure, and each portion of your property's market value is taxed at the rate listed for that bracket, not the total value. The statute, 15-6-134(3)(b)(i) MCA, is written the same way: rates apply to "the market value that is greater than" one threshold "and less than" the next.

So a $500,000 primary residence does not get taxed at 0.90% on the whole thing. It gets 0.76% on the first $378,000 and 0.90% on the remaining $122,000.

Worked example, with a caution

Here is the arithmetic on a $500,000 qualifying primary residence.

Taxable value:

• $378,000 × 0.76% = $2,872.80
• $122,000 × 0.90% = $1,098.00
• Taxable value: $3,970.80

Then the mill levy. Montana law requires a county equalization levy of 55 mills and a state equalization levy of 40 mills (together the commonly cited "95 mills" for K-12) plus 6 mills for the university system and a 1.5-mill levy, all applied statewide. On top of that sit your county, city, school district and special district levies, which are set locally each year.

I am not going to invent your local mills. They vary too much to guess responsibly, and a wrong worked example is worse than none. What I can show you is the shape of the arithmetic: if your parcel's total levy were 600 mills, the bill would be $3,970.80 × 600 ÷ 1,000 = $2,382. At 700 mills it would be $2,779. Same house, same state law, $397 apart.

To get your real number, pull your total mills from your county treasurer's tax statement, or from the Department of Revenue's property record card and certified values at cadastral.mt.gov. The Department publishes certified values and mill levies by taxing jurisdiction at revenue.mt.gov. There is no state-published estimator that will do this for you by address, which is part of why so few people understand their own bill.

The $400,000 versus $800,000 comparison

Because the tiers are marginal, the practical effect on a buyer comparing two price points is smaller than a headline rate suggests, but it is not nothing.

A $400,000 primary residence: $378,000 at 0.76% plus $22,000 at 0.90%. Nearly all of the value sits in the cheapest band.

An $800,000 primary residence: $378,000 at 0.76%, $378,000 at 0.90%, and $44,000 at 1.10%. The average class rate across the whole property has risen, because more of the value sits in higher bands.

The taxable value of the $800,000 home is not double the $400,000 home's. It is somewhat more than double. Whatever mill levy applies, it applies to both, so the ratio holds.

Where this genuinely changes a decision is at the top: above $1,512,000 the marginal band is 1.90%, the same as a second home. A buyer stretching from a $1.4 million house to a $1.7 million house is paying the top rate on that last $188,000, and should put it in the payment math before writing the offer.

And if the property is not your primary residence, none of the tiering applies at all. It is a flat 1.90% on the entire value. That gap is large enough to deserve its own page: second homes and short-term rentals are taxed at 1.90%.

Why your loan estimate's escrow number is a guess

Your lender does not know any of the above about your specific future bill at the time they issue a loan estimate. They typically use the seller's prior-year taxes or a flat percentage of the purchase price.

Three things routinely make the real bill different from that estimate:

Reassessment. The Department of Revenue reappraises on a cycle, and a recent sale is a data point. A property carrying a stale value can jump.

The seller's situation was not yours. If they had the reduced homestead rate and you have not enrolled, their bill dramatically understates yours.

The enrollment gap. The reduced rate is not automatic for a new buyer. A home not enrolled is taxed at the flat 1.90% instead of starting at 0.76%, a difference of more than double at the bottom band. If you bought a Montana home this year, read what to do about the homestead reduced rate now that the deadline has passed, because there is a refund window and it is time-limited.

When the real bill arrives, your servicer re-runs the escrow analysis and your payment changes. That mechanism is covered in what your Montana mortgage payment actually includes.

Where the tax line lands also depends on what you are buying and how you will occupy it. Higher-value property in the resort markets carries a different arithmetic than a median home. The Big Sky and Flathead pages show the price levels involved, and a jumbo-sized loan against a high assessment compounds both lines of the payment at once.

What to do

Find your total mills before you buy, not after. Your county treasurer has them, and a buyer's agent can usually pull the current tax statement on a specific parcel in a few minutes.

Do the marginal math rather than applying one rate to the whole price.

Confirm the property's enrollment status in the reduced rate, and confirm what the seller was actually paying and why.

Then run the payment with real numbers on our payment and escrow calculators rather than a placeholder percentage. Our calculator defaults to a 0.76% estimate of purchase price, which is a reasonable statewide stand-in for an effective rate, but it is a stand-in, not your bill.