Disclaimer: This calculator gives you an estimate based on tax rates and details found online. These rates may change over time. For the most accurate and up-to-date information, please check the official IRS website and your state’s tax website. Always talk to a tax expert for advice about your personal tax situation.
How We Calculate the Result
The Missouri Income Tax Calculator works by first taking your total household income and subtracting any eligible deductions like your 401(k), IRA contributions, itemized deductions, and state personal exemptions. Then it determines your taxable income — the portion of income that is subject to state tax.
Missouri uses a progressive tax system, which means the more you earn, the higher your tax rate (up to a limit). The calculator uses the official 2025 Missouri tax brackets and applies them to your taxable income. It then estimates how much state tax you owe. We also calculate your effective tax rate, which shows what percentage of your total income goes to taxes.
The tool also checks whether you’re required to file a federal tax return, based on your age and filing status. This helps you understand both your state and federal obligations clearly.
About Missouri Income Tax
Missouri collects income tax using a progressive tax system. This means that as your income increases, the percentage of tax you pay goes up too — but only on the portion above certain income levels. For the 2025 tax year, Missouri’s income tax ranges from 2% to 5%.
In Missouri, if your income is less than $112, you don’t owe any state income tax. Above that, rates go up gradually. For example, if your income is under $1,124, you pay 1.5% on the amount over $112. The highest tax rate, 5%, applies only to income above $7,867.
Missouri also allows deductions for things like retirement savings (401(k), IRA), itemized deductions, and personal exemptions, which reduce your taxable income. That means you may not pay tax on your full income.
Everyone’s situation is different, so this calculator helps estimate what you owe by including your income, age, deductions, and filing status.
Frequently Asked Questions
What is the income tax rate in Missouri?
Missouri has a progressive income tax system. The tax rate starts at 2% and goes up to 5% depending on how much you earn. The higher your income, the more tax you may pay — but only on the part of income in each tax bracket.
When do singles start paying Missouri income tax?
Single filers in Missouri start paying state income tax when their taxable income is over $112. That means if you earn less than that after deductions, you don’t owe any Missouri income tax. The first bracket applies a 2% tax rate on income just above that level.
When do married filers start paying Missouri Income tax?
Married filers begin paying Missouri income tax when their combined taxable income exceeds $112. Missouri doesn’t separate the brackets by filing status, so both single and married filers use the same income thresholds. But married couples may have more deductions to reduce their taxable income.
Does Missouri allow personal tax exemptions?
Yes, Missouri allows you to claim personal exemptions which reduce your taxable income. You can enter the number of exemptions in the calculator. Each exemption is typically worth $1,000, which lowers the total amount of income you pay tax on.
Are retirement contributions deductible in Missouri?
Yes, contributions to a 401(k) or IRA can reduce your taxable income in Missouri. These deductions help you save for retirement and reduce the amount of income that is taxed by the state.