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Montana Income Tax Guide

4.7% and 5.65% ratesHouse Bill 337 lowers the upper ordinary-income rate for tax year 2026.
$47,500 single thresholdThe 4.7% band extends to $95,000 joint and $71,250 head of household.
Capital gains use separate ratesNet long-term capital gain is taxed under 3% and 4.1% bands rather than the ordinary schedule.
Official SourcesMontana HB 337 guide2026 Publication 1Montana income taxIRS
Montana HB 337 guide2026 Publication 1Montana income taxIRS
Calculate for Montana

How Montana taxes work

Federal taxable income is approximatedThe estimate subtracts the 2026 federal standard deduction from supported income, then applies Montana adjustments only where the form has enough information.
All status thresholds are modeledSingle/separate use $47,500, head uses $71,250, and joint uses $95,000 before 5.65%.
Only ordinary rates are appliedThe generic other-income field cannot separate net long-term capital gain for Montana's preferential schedule.
Special subtractions are outsideAge-65, medical savings, education savings, and other subtractions require details not collected here.
The EITC is not addedMontana's 2026 credit equals 20% of a qualifying federal credit, but the state estimate does not reproduce its eligibility review.

Common Montana tax questions

Is Montana's top rate still 5.9%?No. Official guidance sets the 2026 top ordinary-income rate at 5.65%.
When does 5.65% begin for a single filer?It applies only to ordinary taxable income above $47,500.
Are capital gains taxed at 5.65%?Not under the regular long-term-gain schedule; this calculator does not identify or calculate that separate schedule.
Is the age-65 subtraction included?No. The calculator does not collect age or qualifying-income facts.
Is a local Montana wage tax added?No broad local individual wage tax is added automatically.
Is this Montana Form 2?No. It is a planning estimate and not a full Montana return.