2025 Missouri State Tax Deadlines
Missouri Individual income tax filing deadlines and extensions for 2025.
If you are a resident or have been involved in business operations within Missouri, you might be required to file Missouri State taxes. Missouri is continuing its series of income tax rate reductions for 2025, with the top marginal rate decreasing from 4.8% to 4.7% as part of ongoing tax reform. This comprehensive guide outlines the key tax deadlines and considerations applicable to Missouri in 2025.
Missouri business tax deadlines for 2025
C Corporations' deadlines and requirements
C Corporations in Missouri must file and pay Corporate Income Taxes by April 15, 2025.
Filing requirements include:
- Complete Missouri Corporate Income Tax Return
- File online through the Missouri Department of Revenue
- File by mail must be postmarked by the due date
- Payment must be made by April 15, 2025
Extension to file taxes in Missouri for 2025
The Extension Deadline for Missouri Corporate income tax returns is October 15, 2025. Missouri automatically grants a six-month extension on filing Corporate income tax returns without requiring separate forms. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2025.
Pass-through entities
Missouri S Corporations and Partnerships tax deadlines for 2025
S Corporations and Partnerships must file in Missouri by April 15, 2025.
Required forms include:
- Missouri S Corporation Tax Return
- Missouri Partnership Tax Return
Extension to file S Corporations and Partnerships taxes in Missouri for 2025
The Extension Deadline for Missouri S Corporations and Partnerships returns is October 15, 2025. Missouri automatically grants a six-month extension on filing pass-through entity tax returns without requiring separate applications. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2025.
Missouri Individual tax considerations for 2025
Filing requirements and income thresholds
Missouri Individuals must file a State income tax return if they are Missouri residents with income above certain thresholds or nonresidents with Missouri-source income.
The 2025 filing thresholds follow federal requirements:
- Single taxpayers - $13,850
- Married filing jointly - $27,700
- Head of household - $20,800
- Married filing separately - $13,850
Estimated tax deadline for Missouri 2025
Estimated tax payments are due:
- April 15, 2025
- June 15, 2025
- September 15, 2025
- January 15, 2026
Who must make estimated payments
You must make Missouri estimated income tax payments during 2025 if you expect to owe $1,000 or more in state income tax after withholding and credits, and your withholding and estimated payments are less than 90% of the current year's tax or 100% of the prior year's tax.
Individual tax deadline for Missouri 2025
You must file and pay Individual Income Taxes in Missouri by April 15, 2025. Missouri accepts electronic filing through the Missouri Department of Revenue's online services, significantly saving time and processing efforts.
Available forms include:
- Form MO-1040 – Missouri Individual Income Tax Return
- Form MO-1040A – Missouri Short Form Individual Income Tax Return
Extension to file taxes in Missouri for 2025
The Extension Deadline is October 15, 2025, to file your Missouri Individual Income tax return. Missouri will automatically grant a six-month extension on filing personal income taxes if a federal extension is filed. If you do not file a federal extension, you must file Form MO-60. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2025.
What Missouri tax professionals need to know
Several key considerations make Missouri's tax landscape unique for 2025. Missouri is continuing its series of income tax rate reductions, with the top marginal rate decreasing to 4.7% in 2025. The State offers various tax credits and business incentives for economic development.
Electronic filing requirements
Missouri provides electronic filing options:
- Missouri Department of Revenue online services
- Commercial tax software integration
- Professional tax preparation services with electronic submission
Income tax rate reduction continues
The Show-Me State is decreasing its top marginal Individual income tax rate from 4.8% to 4.7%, effective January 1, 2025. This reduction continues a series of tax cuts that allow for a 0.1 percentage-point decrease each year that revenue goals are met, until the top rate reaches 4.5%.
Missouri's unique tax features for 2025
No estate tax
Missouri does not impose a state estate tax, providing estate planning advantages compared to states that do impose such taxes.
Social Security benefits exemption
Missouri does not tax Social Security benefits, providing significant relief for retirees compared to many other states that tax these benefits.
Federal deductibility
Missouri allows taxpayers to deduct their federal income taxes paid from their Missouri taxable income, providing additional tax relief that is uncommon among states.
Agricultural and farming provisions
Missouri offers special provisions for farmers and agricultural operations:
- If at least 2/3 of gross income is derived from farming, estimated tax may be paid by January 15, 2026
- Farmers who file their tax return by March 1, 2026, and pay the total tax at that time, need not file an estimated tax
- Various agricultural land use valuations and exemptions
Sources
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The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.
Please note that if any due date falls on a federal or state holiday or weekend, it may be adjusted to the next business day. Always verify current deadlines with the appropriate tax professional and authorities.
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