2026 Missouri State Tax Deadlines
Missouri Individual income tax filing deadlines and extensions for 2026
If you are a resident or have been involved in business operations within Missouri, you might be required to file Missouri State taxes. Missouri follows a progressive income tax structure with rates ranging from 1.5% to 5.3%, making it essential to understand the specific deadlines and requirements for 2026.
Missouri business tax deadlines for 2026
C Corporations' deadlines and requirements
C Corporations in Missouri must file and pay Corporate Income Tax by April 15, 2027, following the federal due date schedule.
Filing requirements include:
- Complete Form MO-1120 (Missouri Corporation Income Tax Return)
- File via Missouri Taxpayer Access Point (MOTAP)
- Payment must be made by April 15, 2027
- Mail submissions must be postmarked by the due date
Extension to file taxes in Missouri for 2026
The Extension Deadline for Missouri Corporate income tax returns is October 15, 2027. Missouri automatically grants a six-month extension following the federal extension timeline without requiring separate forms. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2027.
Pass-through entities
Missouri S Corporations and Partnerships tax deadlines for 2026
S Corporations and Partnerships must file in Missouri by March 15, 2027.
Required forms include:
- Form MO-1120S—S Corporation Return
- Form MO-1065—Partnership Return
Extension to file S Corporations and Partnerships taxes in Missouri for 2026
The Extension Deadline for Missouri S Corporations and Partnerships returns is September 15, 2027. Missouri automatically grants a six-month extension without requiring separate applications. This is an extension to FILE, not an extension to PAY—payment is still due March 15, 2027.
Missouri Individual tax considerations for 2026
Filing requirements and income thresholds
Missouri Individuals must file a State income tax return if their gross income exceeds specific thresholds based on filing status.
The progressive tax rates for 2026 range from:
- 1.5% on the first income bracket
- Up to 5.3% on higher income levels
Estimated tax deadline for Missouri 2026
Estimated tax payments are due on the following schedule for calendar year filers:
- April 15, 2026
- June 15, 2026
- September 15, 2026
- January 15, 2027
Who must make estimated payments
You must make Missouri estimated income tax payments during 2026 if you expect to owe a significant amount in Missouri income tax after subtracting withholding and credits. Electronic payments are encouraged through the Missouri online tax system.
Individual tax deadline for Missouri 2026
Individual income tax returns are due April 15, 2027.
Available forms include:
- Form MO-1040—Missouri Individual Income Tax Return
Extension to file taxes in Missouri for 2026
The Extension Deadline is October 15, 2027, to file your Missouri Individual Income tax return. Missouri automatically grants a six-month extension without requiring separate extension forms. This is an extension to FILE, not an extension to PAY—payment is still due April 15, 2027.
What Missouri tax professionals need to know
Several key considerations make Missouri's tax landscape unique for 2026. Missouri's progressive income tax system provides moderate tax rates, and the state offers various business incentives and deductions. Electronic filing requirements continue to expand, and Missouri provides specific tax planning opportunities for multiple industries.
Electronic filing requirements
Missouri has implemented electronic filing systems for taxpayers:
- C Corporations and pass-through entities should file electronically through MOTAP
- Individuals can use Missouri's online system for free electronic filing
- Business deductions can be processed more efficiently through electronic systems
- Professional preparers must use approved software vendors
Unique Missouri tax features for 2026
Missouri offers several distinctive tax features, including:
- Progressive tax rates ranging from 1.5% to 5.3%
- Federal tax deduction—Missouri allows the deduction of federal income taxes paid
- No local income taxes—Missouri prohibits local income taxes
- Competitive business environment with various incentive programs
Federal Tax Deduction
Missouri's federal tax deduction creates specific planning considerations:
- Federal income taxes paid can be deducted on Missouri returns
- Creates interaction between federal and state tax planning
- May affect the timing of federal tax payments
- Important for moderate and high-income taxpayers
No Local Income Tax
Missouri's prohibition on local income taxes creates advantages:
- Simplified compliance compared to states with local taxes
- Competitive advantage for businesses and Individuals
- Predictable tax burden statewide
- Attractive for multi-location businesses
Agriculture and Rural Development
Missouri's significant agricultural economy creates unique tax considerations:
- Agricultural land use assessment programs
- Beginning farmer tax credits
- Agricultural equipment sales tax exemptions
- Livestock tax provisions
- Rural development incentives
Business incentives and credits
Missouri provides various business tax incentives:
- Missouri Works Program
- Build Missouri Act
- New Markets Tax Credit Program
- Historic Preservation Tax Credit
- Small Business Deduction
Manufacturing and Industrial Development
Missouri emphasizes manufacturing development:
- Manufacturing equipment sales tax exemptions
- Industrial development programs
- Job creation tax credits
- Research and development credits
- Export finance assistance
Transportation and Logistics Hub
Missouri's central location creates logistics advantages:
- Transportation and warehousing incentives
- Distribution center benefits
- Interstate commerce considerations
- Freight and logistics tax provisions
Healthcare and Life Sciences
Missouri has a growing healthcare and life sciences sector:
- Research and development credits for life sciences
- Healthcare facility incentives
- Biotechnology development programs
- Medical device manufacturing benefits
Energy Production
Missouri has diverse energy production:
- Renewable energy tax incentives
- Wind and solar energy credits
- Traditional energy production considerations
- Energy efficiency programs
Retirement income considerations
Missouri provides certain retirement income benefits:
- Military retirement pay may be exempt from Missouri state income tax
- Social Security benefits are generally exempt from the Missouri state income tax
- Pension income considerations for residents
- Senior citizen property tax benefits
Professional tax guidance
For complex Missouri tax situations, consulting with qualified tax professionals through an accounting firm directory can help ensure compliance and identify available tax-saving opportunities.
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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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