Montana charges 4.7-5.65% state income tax. Use the overtime tax calculator pre-loaded with Montana rates.
Open Overtime Tax Calculator →When you work overtime in Montana, each extra hour is subject to federal supplemental withholding (typically 22%), FICA (7.65%), and Montana's graduated rate (up to 5.65%) state tax. Without local income taxes, the state rate is the only additional layer. The overtime calculator shows you the real after-tax value of overtime work with Montana rates, so you can decide whether extra hours are worth it.
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 overtime tax calculator 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.