Never miss a filing date again. This printable calendar covers every key tax deadline for individuals and businesses in 2026 - from estimated payments to extension due dates.
JAN
January 2026
January 15 - Q4 2025 estimated tax payment due (Form 1040-ES). This is your final estimated payment for the 2025 tax year.
January 27 - IRS begins accepting and processing 2025 individual tax returns. E-filing opens on this date.
January 31 - Employers must furnish W-2 forms to all employees. Deadline to furnish 1099-NEC forms to all independent contractors paid $600 or more.
FEB
February 2026
February 28 - Paper filing deadline for information returns to the IRS: Form 1099-MISC, 1099-INT, 1099-DIV, 1099-R, 1099-S, 1099-B, and other 1099 variants. If filing electronically, you have until March 31.
MAR
March 2026
March 15 - S-Corporation tax returns due (Form 1120S). Partnership tax returns due (Form 1065). Schedule K-1s must be issued to partners and shareholders by this date.
March 15 - Deadline to file S-Corp election (Form 2553) for the 2026 tax year. If your LLC wants to be taxed as an S-Corp starting in 2026, this is your cutoff.
March 15 - Deadline to file S-Corp and Partnership extensions (Form 7004). This extends the filing deadline to September 15, 2026.
March 31 - Electronic filing deadline for all 1099 information returns to the IRS.
APR
April 2026
April 15 - Individual income tax returns due (Form 1040). This is the deadline for most Americans to file their 2025 tax returns.
April 15 - C-Corporation tax returns due (Form 1120) for calendar-year filers.
April 15 - Q1 2026 estimated tax payment due (Form 1040-ES). First quarterly payment for the current tax year.
April 15 - Last day to make IRA contributions (Traditional or Roth) for the 2025 tax year.
April 15 - Last day to make HSA contributions for the 2025 tax year.
April 15 - Last day to file an individual extension (Form 4868). This extends your filing deadline to October 15, but does NOT extend the deadline to pay.
April 15 - Last day to file a C-Corporation extension (Form 7004). This extends the filing deadline to September 15, 2026.
JUN
June 2026
June 15 - Q2 2026 estimated tax payment due (Form 1040-ES). Second quarterly estimated tax payment for the current year.
June 15 - Filing deadline for U.S. citizens and resident aliens living abroad. You receive an automatic 2-month extension beyond April 15 if you live and work outside the U.S.
SEP
September 2026
September 15 - Q3 2026 estimated tax payment due (Form 1040-ES). Third quarterly estimated payment for the current year.
September 15 - Extended S-Corporation (Form 1120S) and Partnership (Form 1065) returns due. This is the final deadline if you filed Form 7004 in March.
September 15 - Extended C-Corporation returns (Form 1120) due for calendar-year filers who filed Form 7004 in April.
OCT
October 2026
October 15 - Extended individual tax returns (Form 1040) due. This is the absolute final deadline for anyone who filed Form 4868 in April. No further extensions are available.
DEC
December 2026
December 31 - Last day to make charitable contributions that count as deductions for the 2026 tax year. Donations must be completed (not just pledged) by this date.
December 31 - Last day to complete Roth IRA conversions for the 2026 tax year. Conversions are taxable in the year they occur.
December 31 - Last day to take Required Minimum Distributions (RMDs) from retirement accounts if you are age 73 or older. Failure to take RMDs results in a 25% penalty on the amount not withdrawn.
JAN
January 2027
January 15 - Q4 2026 estimated tax payment due (Form 1040-ES). Final estimated payment for the 2026 tax year. Note: If you file your 2026 return and pay in full by January 31, 2027, you can skip this payment.
Pro Tip: Set Reminders Early
Set calendar reminders 2 weeks before each deadline. Late filing penalties start at 5% of unpaid taxes per month, up to 25%. Late payment penalties are 0.5% per month. These add up fast - a $10,000 tax bill with both penalties can cost you $550 per month in penalties alone.
Important: Always File an Extension If You Can't File on Time
If you can't file on time, ALWAYS file an extension. An extension to file is not an extension to pay - but it eliminates the failure-to-file penalty, which is 10x the failure-to-pay penalty. The failure-to-file penalty is 5% per month (up to 25%). The failure-to-pay penalty is only 0.5% per month. Filing an extension costs nothing and could save you thousands in penalties.
Need Help Meeting These Deadlines?
Our CPA team handles filing, extensions, and estimated payments so you never have to worry about missed deadlines or penalties.
