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Montana cost of living & income (2026)

Quick answer: Montana has a cost-of-living index of 105.9 (100 = national baseline), an illustrative estimated annual cost of living of about $52,950, median household income of $75,340, combined average sales tax about 0.00%, and regular gas about $4.087/gal in the June 2026 AAA snapshot used on the hub.

COL index105.9100 = US baseline
Est. annual COL$52,950
Median HH income$75,340
Sales tax (comb.)0.00%
Gas (87 octane)$4.087/galJune 2026 AAA
Largest cityBillings (120,864)

Taxes & economy

Income tax: Flat 4.7% (some higher elements)

Sales tax: None statewide (local only in some areas)

Major industries: Agriculture (cattle), tourism/outdoors, mining, energy, timber

Climate snapshot

Summer high ~85°F (July) · Winter low ~12°F (January)

Culture (context)

C.M. Russell Museum (Western art) / Little Bighorn

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FAQ

What is Montana's cost of living index?

Montana's cost-of-living index is 105.9 (national baseline 100) in this 2026 classroom snapshot.

What is the estimated annual cost of living in Montana?

The explorer lists an illustrative estimated annual cost of living of about $52,950 for Montana.

What is median household income in Montana?

Median household income in Montana is $75,340 in this dataset.

What is the combined average sales tax rate in Montana?

The combined average sales tax rate shown for Montana is 0.00%. State and local rules vary; see the Tax Foundation citation on the hub.

Does Montana have a state income tax?

State income tax in Montana: Flat 4.7% (some higher elements).

What was regular gas in Montana in this snapshot?

87-octane gas is listed at $4.087 per gallon (AAA, June 2026) in the explorer data.

Sources on the hub: Tax Foundation (sales tax), BEA / ACS (income & COL), AAA gas (June 20, 2026). Educational snapshot — not relocation or tax advice.