2026 Tax Deadline Calendar
Never miss a tax deadline. View all important IRS due dates for 2026, filtered by your business type and category.
Next Deadline
1099 Forms Due (Paper Filing)
6 days
Feb 28
January 2026
Q4 2025 Estimated Tax Payment Due
PaymentFinal quarterly estimated tax payment for 2025
W-2 and 1099-NEC Filing Deadline
InformationEmployers must send W-2s to employees and file with SSA. 1099-NECs due to contractors and IRS.
February 2026
1099 Forms Due (Paper Filing)
InformationPaper-filed 1099-MISC, 1099-INT, 1099-DIV due to IRS (electronic deadline is March 31)
March 2026
S-Corp & Partnership Tax Returns Due
FilingForm 1120-S for S-Corps and Form 1065 for Partnerships. Issue K-1s to shareholders/partners.
S-Corp/Partnership Extension Deadline
ExtensionFile Form 7004 to request 6-month extension (moves deadline to September 15)
1099 Forms Due (Electronic Filing)
InformationElectronically-filed 1099-MISC, 1099-INT, 1099-DIV due to IRS
April 2026
Individual Tax Return Due
FilingForm 1040 due for individuals, including Schedule C for sole proprietors and single-member LLCs
Q1 2026 Estimated Tax Payment Due
PaymentFirst quarterly estimated tax payment for 2026
Individual/C-Corp Extension Deadline
ExtensionFile Form 4868 (individuals) or Form 7004 (C-Corps) to request 6-month extension
IRA/HSA Contribution Deadline
PaymentLast day to make 2025 IRA or HSA contributions
June 2026
Q2 2026 Estimated Tax Payment Due
PaymentSecond quarterly estimated tax payment for 2026
September 2026
Q3 2026 Estimated Tax Payment Due
PaymentThird quarterly estimated tax payment for 2026
Extended S-Corp & Partnership Returns Due
FilingExtended Form 1120-S and Form 1065 returns due
October 2026
Extended Individual & C-Corp Returns Due
FilingExtended Form 1040 and Form 1120 returns due
Tax Calendars by Business Type
View deadlines specific to your business structure with tailored tips, FAQs, and filing guidance.
Key Tax Deadline Rules
Weekend/Holiday Rule
If a deadline falls on a weekend or federal holiday, it moves to the next business day.
Extensions Don't Extend Payment
Filing an extension only extends filing—not payment. Pay by April 15 to avoid penalties.
Fiscal Year Filers
This calendar is for calendar-year filers. Fiscal year businesses have different deadlines.
2026 Quarterly Estimated Tax Schedule
| Quarter | Income Period | Payment Due |
|---|---|---|
| Q4 2025 | Sep 1 - Dec 31, 2025 | January 15, 2026 |
| Q1 2026 | Jan 1 - Mar 31, 2026 | April 15, 2026 |
| Q2 2026 | Apr 1 - May 31, 2026 | June 15, 2026 |
| Q3 2026 | Jun 1 - Aug 31, 2026 | September 15, 2026 |
| Q4 2026 | Sep 1 - Dec 31, 2026 | January 15, 2027 |
Official IRS References
- IRS Publication 509: Tax Calendars
Official IRS calendar of tax deadlines
- IRS Estimated Taxes Guide
Information on quarterly estimated tax payments
- IRS: When to File
Filing deadlines and extension information
Deadlines may change due to holidays, weekends, or IRS announcements. Always verify current deadlines on IRS.gov.