Key dates
Deadlines for the months ahead
Upcoming federal, Kansas and Oklahoma tax deadlines for individuals, businesses, employers and farmers.
November 2026
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Nov2Mon
Third-quarter payroll returns due
Form 941 for July-September, Kansas quarterly withholding and unemployment reports.
Normally October 31, 2026; moved because that date falls on a weekend or holiday.
December 2026
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Dec21Mon
Kansas first-half property tax due
First half of 2026 real estate and personal property tax is due to the county treasurer, or pay the full year now.
Normally December 20, 2026; moved because that date falls on a weekend or holiday.
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Dec31Thu
Year-end: required minimum distributions and last-minute planning
Required minimum distributions for 2026 must be taken by today (a first RMD can wait until April 1). Charitable gifts, equipment purchases, retirement plan setup and payroll bonuses must happen by today to count for 2026.
January 2027
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Jan15Fri
Fourth-quarter estimated tax payment due
Final 2026 estimated payment for individuals (Form 1040-ES) and Kansas (K-40ES). Farmers and fishermen can skip this payment by filing and paying in full by March 1.
February 2027
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Feb1Mon
W-2s, 1099-NECs and fourth-quarter payroll returns due
Employers furnish 2026 W-2s to employees and file them with the Social Security Administration; 1099-NEC forms go to contractors and the IRS. Form 941 (October-December) and Form 940 are due. Kansas annual withholding reconciliation (KW-3) with W-2 and 1099 copies is due to the Department of Revenue.
Normally January 31, 2027; moved because that date falls on a weekend or holiday.
March 2027
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Mar1Mon
Farmers and fishermen: file and pay to avoid an estimated tax penalty
If at least two-thirds of your gross income comes from farming or fishing and you did not make the January estimated payment, file your 2026 return and pay the full balance by today.
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Mar15Mon
S corporation and partnership returns due
Forms 1120-S and 1065 for calendar-year businesses, or a Form 7004 extension to September 15. Today is also the deadline to elect S corporation status for 2027 (Form 2553).
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Mar31Wed
Information returns e-filed with the IRS
Electronic filing deadline for 2026 Forms 1099-MISC, 1099-INT, 1099-DIV and other information returns other than the 1099-NEC, which was due January 31.
April 2027
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Apr15Thu
Individual returns, first-quarter estimates and IRA contributions due
Form 1040 and Kansas K-40 for 2026, or a Form 4868 extension to October 15. An extension gives you more time to file, not to pay, so any balance due should be paid today. C corporation (Form 1120) and trust and estate (Form 1041) returns or extensions are due. First 2027 estimated payment. Last day to fund a 2026 IRA or HSA. FBAR (FinCEN Form 114) due, with an automatic extension to October 15.
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Apr20Tue
Oklahoma returns filed and paid electronically due
Oklahoma gives e-filers until April 20 to file Form 511 or 511-NR and pay electronically. Paper returns and payments were due April 15.
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Apr30Fri
First-quarter payroll returns due
Form 941 for January-March. Kansas quarterly withholding (KW-5) for quarterly filers and the Kansas unemployment wage report are due.
May 2027
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May10Mon
Kansas second-half property tax due
Second half of 2026 real estate and personal property tax is due to the county treasurer.
June 2027
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Jun15Tue
Second-quarter estimated tax payment due
Second 2027 estimated payment for individuals, corporations and Kansas. U.S. citizens living abroad reach their automatic extended filing date for Form 1040.
August 2027
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Aug2Mon
Second-quarter payroll returns and Form 5500 due
Form 941 for April-June, Kansas quarterly withholding and unemployment reports, and Form 5500 for calendar-year retirement plans.
Normally July 31, 2027; moved because that date falls on a weekend or holiday.
September 2027
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Sep15Wed
Third-quarter estimates and extended business returns due
Third 2027 estimated payment for individuals and Kansas. Extended 2026 S corporation and partnership returns (Forms 1120-S and 1065) are due.
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Sep30Thu
Extended trust and estate returns due
Final deadline for extended 2026 Form 1041 returns.
October 2027
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Oct15Fri
Extended individual and C corporation returns due
Final deadline for extended 2026 Form 1040 and Kansas K-40, extended Form 1120, and the FBAR. Last day for SEP-IRA contributions on extended returns.
November 2027
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Nov1Mon
Third-quarter payroll returns due
Form 941 for July-September, Kansas quarterly withholding and unemployment reports.
Normally October 31, 2027; moved because that date falls on a weekend or holiday.
December 2027
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Dec20Mon
Kansas first-half property tax due
First half of 2027 real estate and personal property tax is due to the county treasurer, or pay the full year now.
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Dec31Fri
Year-end: required minimum distributions and last-minute planning
Required minimum distributions for 2027 must be taken by today (a first RMD can wait until April 1). Charitable gifts, equipment purchases, retirement plan setup and payroll bonuses must happen by today to count for 2027.
- Kansas retailers' sales and compensating use tax returns are due on the 25th of the month after the reporting period, whether you file monthly, quarterly or annually.
- Kansas withholding tax deposits follow the schedule the Department of Revenue assigned to you (quad-monthly, semi-monthly, monthly, quarterly or annual). Federal payroll tax deposits follow your IRS schedule (semi-weekly or monthly).
- Dates shown have already been moved past weekends and federal holidays. When a deadline matters to you, confirm it with us; a few state deadlines follow slightly different rules.