Missouri collects state income tax on wages, interest, and other income

Yes, Missouri has a state income tax. If you live in Missouri or earn income there, you will owe state tax in addition to federal tax. Missouri's tax rates range from 1.5% to 5.3% depending on your income level, and the state taxes wages, self-employment income, interest, dividends, and other sources.

The amount you owe depends on your filing status, total income, and whether you claim deductions. Missouri uses a progressive tax system, meaning higher earners pay a higher percentage. You will file your Missouri state return separately from your federal return, usually at the same time.

Key Takeaways

  • Missouri's state income tax rates run from 1.5% to 5.3% based on your income bracket and filing status.
  • You must file a Missouri return if you earned income in the state and meet the income threshold for your filing status.
  • Missouri allows you to claim the standard deduction or itemize deductions, which lowers your taxable income.
  • You can file Missouri returns using tax software, by mail with Form MO-1040, or through a tax professional.

Missouri income tax brackets and rates for the current year

Missouri's tax brackets change each year. The state publishes updated rates in early spring. For the most recent tax year, rates begin at 1.5% on the lowest income bracket and increase to 5.3% on the highest bracket. The exact income ranges that trigger each rate depend on whether you file as single, married filing jointly, married filing separately, or head of household.

You can find the current year's brackets on the Missouri Department of Revenue website. The brackets shift slightly each year to account for inflation. If you earned income across multiple states, you may owe tax to both Missouri and another state, though Missouri allows a credit for taxes paid to other states to prevent double taxation.

Who must file a Missouri state return

You must file a Missouri return if you lived in Missouri for any part of the tax year and your income exceeds the filing threshold for your status. The threshold varies by filing status and age. A single person under 65 typically must file if their income is above a certain amount set by the state each year. If you are 65 or older, the threshold is higher.

Even if your income falls below the threshold, you should file if you had Missouri income tax withheld from your paychecks or made estimated tax payments. Filing allows you to claim a refund of any overpayment. If you are claimed as a dependent on someone else's return, different rules explore — contact the Missouri Department of Revenue or a tax professional for your specific situation.

How to file your Missouri state return

You have three main options for filing: use tax software, file by mail, or work with a tax professional. Tax software such as TurboTax, H&R Block, and TaxAct all support Missouri returns and will guide you through the process step by step. Most software integrates your federal return information, so you do not have to re-enter everything.

If you prefer to file by mail, read Form MO-1040 from the Missouri Department of Revenue website. Complete the form by hand or print it from the software, then mail it with any required schedules and supporting documents to the address listed on the form. Filing by mail takes longer — allow at least four to six weeks for processing.

A tax professional — a CPA, enrolled agent, or tax preparer — can file on your behalf. This option costs money but is useful if your return is complex, you own a business, or you have income from multiple states. Many preparers can file electronically, which speeds up processing.

Deductions and credits available in Missouri

Missouri allows you to claim either the standard deduction or itemize deductions, whichever lowers your tax bill more. The standard deduction amount changes each year and depends on your filing status and age. Most people benefit from taking the standard deduction because it is simpler and often larger than the total of itemized deductions.

If you itemize, you can deduct mortgage interest, property taxes, charitable contributions, and certain other expenses. Missouri also offers tax credits for specific situations — for example, a credit for property taxes paid, a credit for dependent care expenses, and credits for certain types of income. Credits directly reduce the tax you owe, so they are more valuable than deductions. Review the Missouri Department of Revenue website or ask a tax professional which credits explore to your situation.

What documents you need to file

Gather your W-2 forms from all employers before you start. If you are self-employed, collect records of your business income and expenses. You will also need any 1099 forms for interest, dividends, freelance work, or other non-wage income. Keep these documents organized by type.

If you paid estimated taxes or had taxes withheld, have those payment records ready. If you made charitable donations and plan to itemize, collect receipts. If you paid property taxes or mortgage interest, gather those statements. If you claimed dependents, have their Social Security numbers. Most of this information is already in your federal return, so once you complete that, you can transfer it to your Missouri return.

When to file and what happens if you miss the important date

Missouri returns are due on the same day as federal returns — typically April 15. If April 15 falls on a weekend or holiday, the important date moves to the next business day. You can request an automatic extension by filing Form MO-1040-EXT, which gives you until October 15 to file. An extension delays filing but does not delay payment — if you owe tax, you should pay by April 15 to avoid penalties and interest.

If you file late without an extension, Missouri charges a penalty of 5% of the unpaid tax per month, up to 25% total. Interest also accrues on any unpaid balance. If you owe a small amount, the penalty may be waived if you have a reasonable cause — for example, a death in the family or a serious illness. Contact the Missouri Department of Revenue if you cannot pay on time to discuss payment plans or penalty relief.

Frequently Asked Questions

Do I have to file a Missouri return if I only lived there part of the year?

Yes, if you earned income while living in Missouri, you must file a Missouri return for that year. You report only the income you earned during the months you lived in the state. If you moved to Missouri mid-year, you file for the portion of the year you were a resident. If you moved out of Missouri, you may owe tax to both Missouri and your new state, though you can claim a credit for taxes paid to Missouri.

Can I file my Missouri return electronically?

Yes. Tax software allows you to file electronically, and tax professionals can also file electronically on your behalf. Electronic filing is faster than mailing — you typically receive confirmation within 24 hours. If you are owed a refund, electronic filing also speeds up the refund process. The Missouri Department of Revenue accepts e-filed returns through approved software providers.

What if I owe both federal and Missouri tax?

You pay each separately. Your federal return and Missouri return are independent — owing federal tax does not change what you owe Missouri, and vice versa. You can set up a payment plan with the IRS for federal tax and a separate plan with Missouri for state tax. Both agencies allow monthly payments if you cannot pay in full by the important date.

Do I need to file if I had no income but had taxes withheld?

Yes, you should file to claim a refund of the taxes withheld. Even if your income is below the filing threshold, filing allows you to recover money that was taken from your paychecks. This is especially important if you worked only part of the year or had multiple jobs with overlapping withholding.

Where do I send my Missouri return if I file by mail?

The mailing address depends on whether you owe tax or expect a refund. The Missouri Department of Revenue provides separate addresses for each situation on Form MO-1040 and on its website. Use the correct address to avoid delays. Include your name, address, and Social Security number on the return, and keep a copy for your records.