Montana charges 4.7-5.65% state income tax. Use the quarterly tax estimator pre-loaded with Montana rates.
Open Quarterly Tax Estimator →Quarterly estimated payments in Montana must cover both your federal and state obligations. Montana uses graduated rates (4.7-5.65%), and most states require their own quarterly payment schedule that may differ from the IRS dates. This estimator pre-loads Montana's tax rates so you can calculate both federal and state quarterly amounts in one place, avoiding underpayment penalties at both levels.
Montana uses a graduated income tax with brackets ranging from 4.7-5.65%. Lower income is taxed at lower rates, with the 5.65% top rate applying only to income in the highest bracket. This progressive structure means your effective state tax rate is always lower than the top marginal rate. Montana does not have local income taxes, so the state graduated rate is the total state-level income tax burden.
The table below shows what you actually keep at five salary levels in Montana, accounting for federal tax, FICA, and Montana's graduated (4.7-5.65%) state tax.
See how Montana compares to other West states. Each link takes you to the quarterly tax estimator landing page for that state.
For a comprehensive breakdown of Montana’s tax structure, salary comparisons, cost-of-living analysis, and more, visit the full Montana take-home pay page.