Montana's 2026 state standard deduction is an estimated $5,000 for single filers, $10,000 for married couples filing jointly, and $7,500 for heads of household. The standard deduction lowers the income Montana taxes, so you only pay state tax on income above these amounts unless itemizing produces a larger deduction.
| Filing status | Standard deduction |
|---|---|
| Single | $5,000 |
| Married filing jointly | $10,000 |
| Head of household | $7,500 |
Your Montana standard deduction is subtracted from your state taxable income before the tax rate is applied. You take either the standard deduction or your total itemized deductions — whichever is larger. Most households take the standard deduction because it exceeds their itemizable expenses.
Montana's estimated 2026 standard deduction is $5,000 for single filers, $10,000 for married filing jointly, and $7,500 for head of household.
Note: 2026 figures are estimates from SAWD's tax engine. Verify current amounts with the Montana Department of Revenue before filing.
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