Free tool
Startup tax calendar 2027, with a calendar file for your company type
Pick your company type to get every 2027 federal and Delaware deadline for your 2026 books, then add them to Google Calendar, Outlook or Apple Calendar with one file. A Delaware C corporation starts with W-2s and 1099-NECs on February 1, the franchise tax on March 1 and Form 1120 on April 15. S corporations and partnerships file by March 15, and Delaware LLCs pay $300 by June 1.
C corp, 2027
14 deadlines
First: W-2s to employees and the SSA, Mon, Feb 1
Opens in Google Calendar, Outlook and Apple Calendar, with a reminder a week before each date.
February 2027
- Mon, Feb 1W-2s to employees and the SSA · W-2 and W-32026 wage statements to each employee and to the Social Security Administration. January 31 is a Sunday.
- Mon, Feb 11099-NECs to contractors and the IRS · 1099-NECOne for each contractor paid $2,000 or more by bank in 2026 who isn't a corporation.
- Mon, Feb 1Federal unemployment tax return · 940Form 940 for 2026.
- Mon, Feb 1Fourth-quarter 2026 payroll return · 941Form 941 for October to December 2026.
March 2027
- Mon, Mar 1Delaware annual report and franchise tax · Delaware annual reportEvery Delaware corporation files its annual report and pays franchise tax, at least $175 plus the $50 report fee.
April 2027
- Thu, Apr 15C corporation return, or an extension and payment · 1120 or 7004Form 1120 for 2026, even with no revenue, or Form 7004. An extension doesn't extend the time to pay.
- Thu, Apr 15First estimated tax payment · Electronic paymentOnly if the corporation expects to owe $500 or more of tax for 2027.
- Fri, Apr 30First-quarter payroll return · 941Form 941 for January to March.
June 2027
- Tue, Jun 15Second estimated tax payment · Electronic paymentOnly if the corporation expects to owe $500 or more of tax for 2027.
August 2027
- Mon, Aug 2Second-quarter payroll return · 941Form 941 for April to June. July 31 is a Saturday.
September 2027
- Wed, Sep 15Third estimated tax payment · Electronic paymentOnly if the corporation expects to owe $500 or more of tax for 2027.
October 2027
- Fri, Oct 15Extended C corporation return · 1120Form 1120, if you filed Form 7004 in April.
November 2027
- Mon, Nov 1Third-quarter payroll return · 941Form 941 for July to September. October 31 is a Sunday.
December 2027
- Wed, Dec 15Fourth estimated tax payment · Electronic paymentOnly if the corporation expects to owe $500 or more of tax for 2027.
- Feb 1, 2027Feb 1, 2027W-2s to employees and the SSAW-2 and W-3
- Mar 1, 2027Mar 1, 2027Delaware annual report and franchise taxDelaware annual report
- Apr 15, 2027Apr 15, 2027C corporation return, or an extension and payment1120 or 7004
- Apr 30, 2027Apr 30, 2027First-quarter payroll return941
- Jun 15, 2027Jun 15, 2027Second estimated tax paymentElectronic payment
How it's calculated
- Dates are for a company with a December 31 year end, for the 2026 tax year and 2027 estimated tax.
- When a due date falls on a weekend or legal holiday, the IRS moves it to the next business day: January 31, 2027 is a Sunday, so W-2s and 1099-NECs are due February 1.
- Delaware corporations, S corporations included, pay franchise tax and file an annual report by March 1. Delaware LLCs pay a flat $300 by June 1 and file no report.
- Payroll dates show only if you have employees, and the 1099-NEC date only if you paid contractors. State income and payroll taxes outside Delaware are not included.
- The calendar file adds each date as an all-day event with a reminder a week before. It is built in your browser.
Questions founders ask
When is the C corporation tax return due in 2027?
April 15, 2027 for a calendar-year C corporation, or October 15, 2027 with Form 7004. The extension gives more time to file, not to pay.
When are S corporation and partnership returns due?
March 15, 2027, or September 15, 2027 with Form 7004. Owners need their Schedule K-1s to file their own returns by April 15.
When is Delaware franchise tax due?
March 1, 2027 for Delaware corporations, with the annual report. Delaware LLCs pay a flat $300 by June 1, 2027.
Does the calendar cover state taxes?
Only Delaware's. Each state where you have employees, sales or an office sets its own dates, so add those with your CPA.
Rules from, checked September 30, 2026: