Missouri business filing dates, 2027

State-level due dates for businesses filing in Missouri. Every line links to the official page it came from, with the date that page was read. Where no official source has been verified, the line says so instead of showing a date.

Add to Google Calendar Add to Apple or Outlook Download .ics25 dated lines in the calendar file · sources last read 2026-09-23

Income / franchise tax return

3 dates

The annual return for the business’s tax year, and in franchise-tax states the report that keeps the entity in good standing. Which form and which date depend on the entity type and the tax year. Where the source grants an extension, it extends the time to file; the source says whether it also extends the time to pay.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Form MO-1065 partnership returncalendar-year partnership Source text “The partnership return is due on the 15th day of the fourth month following the close of the calendar or fiscal year. For partnerships operating on a calendar year basis, the return is due on April 15th.”verbatim · dor.mo.gov · retrieved 2026-09-23 “Form MO-1065 must be filed, if Federal Form 1065 is required to be filed and the partnership has (1) a partner that is a Missouri resident or (2) any income derived from Missouri sources, Section 143.581, RSMo.”verbatim · dor.mo.gov · retrieved 2026-09-23 “If you receive an extension of time to file your Federal Partnership Income Tax Return, you will automatically be granted an extension of time to file your Missouri Partnership Return of Income for the same 6-month period.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toA partnership that files federal Form 1065 and has a Missouri-resident partner or Missouri-source income (the preparer attests either) files Form MO-1065 by the 15th day of the 4th month after its calendar or fiscal year closes (April 15 for calendar-year partnerships). A federal extension automatically extends the Missouri return for the same six months. The source states no weekend rule, so the stated date is shown.	Due ruleMO-1065: 15th day of the 4th month after the tax year ends	2027 dates Apr 15ThuMO-1065extended (Federal Form 7004): Oct 15	Source · retrieveddor.mo.gov/faq/taxation/business/partnership.html (official source, opens in a new tab)retrieved 2026-09-23dor.mo.gov/forms/MO-1065_2025.pdf (official source, opens in a new tab)retrieved 2026-09-23
Form MO-1120 corporation income tax returncalendar-year C corporation Source text “When is my corporate income tax return due? Your Missouri return is due the 15th day of the 4th month following the year end.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toA corporation's Missouri return is due the 15th day of the 4th month after its year ends.	Due ruleMO-1120: 15th day of the 4th month after the tax year ends	2027 dates Apr 15ThuMO-1120	Source · retrieveddor.mo.gov/taxation/business/registration/small-business/maintain/corporate.html (official source, opens in a new tab)retrieved 2026-09-23
Form MO-1120S S corporation returncalendar-year S corporation Source text “The Missouri S-Corporation return is due on or before the 15th day of the fourth month following the end of the tax year.”verbatim · dor.mo.gov · retrieved 2026-09-23 “Note: When the due date falls on a Saturday, Sunday, or legal holiday, the return will be considered timely filed on the next business day.”verbatim · dor.mo.gov · retrieved 2026-09-23 “Every S-Corporation must file Form MO-1120S if they file Federal Form 1120-S and the S-Corporation has: 1) a shareholder that is a Missouri resident; or 2) any income derived from Missouri sources.”verbatim · dor.mo.gov · retrieved 2026-09-23 “If an S-Corporation has been granted an extension of time to file its federal income tax return, the time for filing the Missouri corporation income tax return is automatically extended.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toAn S corporation that files federal Form 1120-S and has a Missouri-resident shareholder or Missouri-source income (the preparer attests either) files Form MO-1120S by the 15th day of the 4th month after its tax year ends (April 15 for calendar-year filers); a Saturday, Sunday or legal-holiday date moves to the next business day. A federal extension automatically extends the Missouri filing date (length not stated here).	Due ruleMO-1120S: 15th day of the 4th month after the tax year endsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Apr 15ThuMO-1120S State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrieveddor.mo.gov/forms/MO-1120S%20Instructions_2025.pdf (official source, opens in a new tab)retrieved 2026-09-23
No Missouri corporation franchise tax Source text “No franchise tax was imposed beginning on or after January 1, 2016.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toMissouri imposes no corporation franchise tax for tax periods beginning on or after January 1, 2016.	Due ruleNo date: see the source text	2027 dates—	Source · retrieveddor.mo.gov/revenue-annual-financial-report/documents/financialstatreport19.pdf (official source, opens in a new tab)retrieved 2026-09-23

Estimated tax

1 date · 2 not dated yet

Installments paid during the year toward the year’s tax. Whether a business must pay them depends on its expected liability, which this page cannot know; the lines show when installments fall due for those who must.

Why no dates: Every date shown here is checked against its official source.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Individual estimated tax (MO-1040ES) for 2026Schedule C filer Source text “Your estimated tax may be paid in full with the first declaration voucher, or in equal installments on or before April 15, June 15, September 15, and January 15. If the due date falls on a Saturday, Sunday, or legal holiday, the voucher will be considered timely if filed on the next business day.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toAn individual (including a sole proprietor) paying 2026 Missouri estimated tax pays in full with the first voucher or in installments by April 15, June 15, September 15 and January 15; a weekend or legal-holiday date moves to the next business day.	Due rule1st quarter: April 15 of the year the calendar year begins; 2nd quarter: June 15 of the year the calendar year begins; 3rd quarter: September 15 of the year the calendar year begins; 4th quarter: January 15 of the year after the calendar year beginsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Jan 15Fri4th quarter State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrieveddor.mo.gov/forms/MO-1040ES_2026.pdf (official source, opens in a new tab)retrieved 2026-09-23
Corporate estimated tax (MO-1120ES) for 2026calendar-year C corporation	Applies toA corporation whose 2026 Missouri estimated tax can reasonably be expected to be at least $250 pays by the 15th day of the 4th, 6th, 9th and 12th months of its tax year; a Saturday, Sunday or legal-holiday date moves to the next business day.	Due ruleUnsupported	2027 datesAuthority for 2027 not yet published; no date is shown until it is.	Source · retrievedNo verified source on file
Individual estimated tax (MO-1040ES) for 2026Schedule C filer	Applies toAn individual (including a sole proprietor) paying 2026 Missouri estimated tax pays in full with the first voucher or in installments by April 15, June 15, September 15 and January 15; a weekend or legal-holiday date moves to the next business day.	Due ruleUnsupported	2027 datesAuthority for 2027 not yet published; no date is shown until it is.	Source · retrievedNo verified source on file

Individual estimated tax (MO-1040ES) for 2026Schedule C filer

Source text

“Your estimated tax may be paid in full with the first declaration voucher, or in equal installments on or before April 15, June 15, September 15, and January 15. If the due date falls on a Saturday, Sunday, or legal holiday, the voucher will be considered timely if filed on the next business day.”verbatim · dor.mo.gov · retrieved 2026-09-23

Applies toAn individual (including a sole proprietor) paying 2026 Missouri estimated tax pays in full with the first voucher or in installments by April 15, June 15, September 15 and January 15; a weekend or legal-holiday date moves to the next business day.

Due rule1st quarter: April 15 of the year the calendar year begins; 2nd quarter: June 15 of the year the calendar year begins; 3rd quarter: September 15 of the year the calendar year begins; 4th quarter: January 15 of the year after the calendar year beginsA date on a weekend moves to the next business day; state holidays are not compiled.

2027 dates

Jan 15Fri4th quarter

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrieveddor.mo.gov/forms/MO-1040ES_2026.pdfretrieved 2026-09-23

Corporate estimated tax (MO-1120ES) for 2026calendar-year C corporation

Applies toA corporation whose 2026 Missouri estimated tax can reasonably be expected to be at least $250 pays by the 15th day of the 4th, 6th, 9th and 12th months of its tax year; a Saturday, Sunday or legal-holiday date moves to the next business day.

Due ruleUnsupported

2027 datesAuthority for 2027 not yet published; no date is shown until it is.

Source · retrievedNo verified source on file

Individual estimated tax (MO-1040ES) for 2026Schedule C filer

Due ruleUnsupported

2027 datesAuthority for 2027 not yet published; no date is shown until it is.

Source · retrievedNo verified source on file

Withholding

Unsupported

Returns and deposits of income tax withheld from employees’ wages. The agency assigns each employer a deposit frequency, usually from its past liability, so the dates differ by frequency.

Why no dates: No official source confirmed yet for Missouri's employer withholding due dates.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Withholding	Applies toShown once verified	Due ruleUnsupported	2027 datesNo official source confirmed yet for Missouri's employer withholding due dates.	Source · retrievedNo verified source on file

Unemployment insurance

4 dates

Employer contribution and wage reports for unemployment insurance: the state program, and FUTA at the federal level.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Quarterly contribution and wage report Source text “The report should be filed and contributions paid by the last day of the month following the end of each calendar quarter to be considered timely.”verbatim · labor.mo.gov · retrieved 2026-09-23 “When the date falls on a Saturday, Sunday, or holiday, the first working date following is considered timely.”verbatim · labor.mo.gov · retrieved 2026-09-23	Applies toAn employer files its quarterly contribution and wage report and pays by the last day of the month after each quarter; a Saturday, Sunday or holiday date moves to the next working day.	Due ruleContribution and wage report: last day of the month after the quarter endsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Feb 1MonContribution and wage report · moved from Sun Jan 31 Apr 30FriContribution and wage report Aug 2MonContribution and wage report · moved from Sat Jul 31 Nov 1MonContribution and wage report · moved from Sun Oct 31 State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrievedlabor.mo.gov/des/employers/quarterly-reports (official source, opens in a new tab)retrieved 2026-09-23

Quarterly contribution and wage report

Source text

“The report should be filed and contributions paid by the last day of the month following the end of each calendar quarter to be considered timely.”verbatim · labor.mo.gov · retrieved 2026-09-23

“When the date falls on a Saturday, Sunday, or holiday, the first working date following is considered timely.”verbatim · labor.mo.gov · retrieved 2026-09-23

Applies toAn employer files its quarterly contribution and wage report and pays by the last day of the month after each quarter; a Saturday, Sunday or holiday date moves to the next working day.

Due ruleContribution and wage report: last day of the month after the quarter endsA date on a weekend moves to the next business day; state holidays are not compiled.

2027 dates

Feb 1MonContribution and wage report · moved from Sun Jan 31
Apr 30FriContribution and wage report
Aug 2MonContribution and wage report · moved from Sat Jul 31
Nov 1MonContribution and wage report · moved from Sun Oct 31

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrievedlabor.mo.gov/des/employers/quarterly-reportsretrieved 2026-09-23

Sales and use tax

17 dates

Returns for sales and use tax collected under a permit. The agency assigns each permit holder a filing frequency; the dates differ by frequency.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Sales and use tax returnannual filer Source text “Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23 “If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toFiling frequency follows state tax collected ($500 or more a month monthly; $500 or less quarterly; under $200 a quarter annually). Monthly returns are due the last day of the following month, quarterly returns the last day of the month after the quarter, annual returns January 31.	Due ruleAnnual sales tax return: January 31 of the year after the calendar year endsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Feb 1MonAnnual sales tax return · moved from Sun Jan 31 State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.html (official source, opens in a new tab)retrieved 2026-09-23
Sales and use tax returnquarterly filer Source text “Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23 “If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toFiling frequency follows state tax collected ($500 or more a month monthly; $500 or less quarterly; under $200 a quarter annually). Monthly returns are due the last day of the following month, quarterly returns the last day of the month after the quarter, annual returns January 31.	Due ruleSales tax return: last day of the month after the quarter endsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Feb 1MonSales tax return · moved from Sun Jan 31 Apr 30FriSales tax return Aug 2MonSales tax return · moved from Sat Jul 31 Nov 1MonSales tax return · moved from Sun Oct 31 State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.html (official source, opens in a new tab)retrieved 2026-09-23
Sales and use tax returnmonthly filer Source text “Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23 “If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toFiling frequency follows state tax collected ($500 or more a month monthly; $500 or less quarterly; under $200 a quarter annually). Monthly returns are due the last day of the following month, quarterly returns the last day of the month after the quarter, annual returns January 31.	Due ruleSales tax return: last day of the month after the month endsA date on a weekend moves to the next business day; state holidays are not compiled.	2027 dates Feb 1MonSales tax return · moved from Sun Jan 31 Mar 1MonSales tax return · moved from Sun Feb 28 Mar 31WedSales tax return Apr 30FriSales tax return May 31MonSales tax return Jun 30WedSales tax return Aug 2MonSales tax return · moved from Sat Jul 31 Aug 31TueSales tax return Sep 30ThuSales tax return Nov 1MonSales tax return · moved from Sun Oct 31 Nov 30TueSales tax return Dec 31FriSales tax return State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.	Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.html (official source, opens in a new tab)retrieved 2026-09-23

Sales and use tax returnannual filer

Source text

“Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23

“If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23

Applies toFiling frequency follows state tax collected ($500 or more a month monthly; $500 or less quarterly; under $200 a quarter annually). Monthly returns are due the last day of the following month, quarterly returns the last day of the month after the quarter, annual returns January 31.

Due ruleAnnual sales tax return: January 31 of the year after the calendar year endsA date on a weekend moves to the next business day; state holidays are not compiled.

2027 dates

Feb 1MonAnnual sales tax return · moved from Sun Jan 31

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.htmlretrieved 2026-09-23

Sales and use tax returnquarterly filer

Source text

“Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23

“If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23

Due ruleSales tax return: last day of the month after the quarter endsA date on a weekend moves to the next business day; state holidays are not compiled.

2027 dates

Feb 1MonSales tax return · moved from Sun Jan 31
Apr 30FriSales tax return
Aug 2MonSales tax return · moved from Sat Jul 31
Nov 1MonSales tax return · moved from Sun Oct 31

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.htmlretrieved 2026-09-23

Sales and use tax returnmonthly filer

Source text

“Monthly returns are due on or before the last day of the following month. Quarterly returns are due on or before the last day of the month following the end of the quarter. For example, your return for the January through March period would be due on or before April 30. Annual returns are due on or before January 31 of the following year.”verbatim · dor.mo.gov · retrieved 2026-09-23

“If you collect state taxes of $500 or more per month, please report on a monthly basis. If you collect $500 or less per month, you should file on a quarterly basis. The quarters are as follows: January through March, April through June, July through September, and October through December. If you collect less than $200 per quarter, please file on an annual basis.”verbatim · dor.mo.gov · retrieved 2026-09-23

Due ruleSales tax return: last day of the month after the month endsA date on a weekend moves to the next business day; state holidays are not compiled.

2027 dates

Feb 1MonSales tax return · moved from Sun Jan 31
Mar 1MonSales tax return · moved from Sun Feb 28
Mar 31WedSales tax return
Apr 30FriSales tax return
May 31MonSales tax return
Jun 30WedSales tax return
Aug 2MonSales tax return · moved from Sat Jul 31
Aug 31TueSales tax return
Sep 30ThuSales tax return
Nov 1MonSales tax return · moved from Sun Oct 31
Nov 30TueSales tax return
Dec 31FriSales tax return

State legal holidays are not compiled: if this date is a state holiday, the deadline moves to the next business day.

Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.htmlretrieved 2026-09-23

Annual report

no fixed date

The annual or biennial report an entity files with the Secretary of State (or its equivalent) to stay in good standing. Some are keyed to the month the entity was formed.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
No annual report for LLCs Source text “Do limited liability companies have to file an annual report? No.”verbatim · sos.mo.gov · retrieved 2026-09-23	Applies toMissouri LLCs do not file an annual report with the Secretary of State.	Due ruleNo date: see the source text	2027 dates—	Source · retrievedsos.mo.gov/business/faqs (official source, opens in a new tab)retrieved 2026-09-23

Due-date rules

no fixed date

The conventions other lines cite: how a date on a weekend or holiday moves, and how a disaster declaration postpones deadlines.

Obligation	Applies to	Due rule	2027 dates	Source · retrieved
Weekend and holiday due dates Source text “When the due date falls on a Saturday, Sunday or a state of Missouri holiday, the return is due the next business day.”verbatim · dor.mo.gov · retrieved 2026-09-23	Applies toA Missouri sales tax due date on a Saturday, Sunday or state holiday moves to the next business day.	Due ruleNo date: see the source text	2027 dates—	Source · retrieveddor.mo.gov/faq/taxation/business/sales-tax-filing.html (official source, opens in a new tab)retrieved 2026-09-23

Dates are computed from the linked pages as they read on each retrieval date. Agencies change their pages, and the IRS postpones deadlines after disasters; confirm with the source before filing.

Tracking these for a list of clients? FilingDates builds each client’s calendar from the same rules, with every date linked to its source.