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Every major federal filing and payment deadline for 2026, including extensions. Verified by Nausheen Shahid, LMN Tax Inc. Bookmark irscountdown.com — updated every tax year.
Date
Who It Affects
Form
Type
Jan 15, 2026
Freelancers / self-employed (Q4 2025 income)
1040-ES
Q4 Estimated
Jan 31, 2026
Employers → send W-2 & 1099-NEC to recipients
W-2 / 1099-NEC
Employer
Feb 28, 2026
Employers filing paper 1099s to IRS
1099 (paper)
Employer
Mar 16, 2026
S-Corporations, Partnerships
1120-S / 1065
Business
Mar 31, 2026
Employers filing electronic 1099s to IRS
1099 (e-file)
Employer
Apr 15, 2026
Individual taxpayers, C-Corps
1040 / 1120
Individual
Apr 15, 2026
Self-employed (Q1 income)
1040-ES
Q1 Estimated
Jun 15, 2026
Self-employed (Q2 income)
1040-ES
Q2 Estimated
Sep 15, 2026
Self-employed (Q3 income)
1040-ES
Q3 Estimated
Sep 15, 2026
S-Corp / Partnership extended filers
1120-S / 1065
Extension
Oct 15, 2026
Individual extended filers
1040 (ext.)
Extension
Jan 15, 2027
Self-employed (Q4 income)
1040-ES
Q4 Estimated
Frequently Asked Questions
Common questions about 2026 IRS deadlines, W-2s, 1099s, extensions, and penalties. Verified by Nausheen Shahid, LMN Tax Inc.
For most individuals, the federal return (Form 1040) is due April 15, 2026. S-Corps and Partnerships are due March 16, 2026. Employers must send W-2 and 1099-NEC forms to workers by January 31, 2026. Freelancers paying estimated taxes have four deadlines across the year. Need help? Contact LMN Tax Inc or call (571) 326-7900.
Your employer must send your W-2 by January 31, 2026. Clients must send 1099-NEC forms by the same date. If you haven't received yours by mid-February, contact the payer first, then call the IRS at 800-829-1040. If you're a business that needs to file 1099s, LMN Tax Inc can handle that for you.
File Form 4868 by April 15, 2026 to extend your individual filing to October 15, 2026. S-Corps and Partnerships file Form 7004 by March 16 to extend to September 15, 2026. Important: an extension covers your filing date — taxes owed are still due on the original deadline. LMN Tax Inc can file your extension.
Missing the deadline without filing an extension triggers a failure-to-file penalty of 5% per month on unpaid taxes (max 25%) plus a failure-to-pay penalty of 0.5% per month, plus interest. Even if you can't pay, file on time and set up an IRS payment plan. LMN Tax Inc can help you resolve IRS issues.
Generally yes if you expect to owe $1,000+ in federal tax after withholding — this applies to freelancers, self-employed, landlords, and investors. The 2026 dates are April 15, June 15, September 15, and January 15, 2027. Use QuarterlyTaxPro.com to calculate your exact amounts — verified by Nausheen Shahid.
Google Cal — click the button on any card above, Google Calendar opens pre-filled, click Save. Apple / iCal — downloads a .ics file that opens in Apple Calendar, Outlook, or any iCalendar-compatible app. All .ics files include automatic 7-day and 1-day reminders so you never miss a deadline.
All deadlines verified by Nausheen Shahid — Founder, LMN Tax Inc · 22+ years experience · lmntax.com
Disclaimer: IRSCountdown.com is an informational tool operated by LMN Tax Inc and does not constitute tax, legal, or financial advice. Tax deadlines may shift due to IRS announcements, federal holidays, or disaster relief declarations. Always verify at IRS.gov or consult a qualified tax professional. LMN Tax Inc. is a tax preparation and business services firm. Not a licensed CPA firm in the Commonwealth of Virginia.