The 2027 tax deadline calendar
Federal and Louisiana dates, one table. As of November 2026.
Deadlines in date order
| Date | Level | What | Who it applies to | Form |
|---|---|---|---|---|
| Jan 15, 2027 | Federal | Estimated tax, 4th installment for 2026 Not due if the 2026 return is filed by February 1, 2027 with the entire balance due. | Individuals with untaxed income | 1040-ES |
| Jan 15, 2027 | Louisiana | Estimated individual income tax, 4th payment for 2026 | Individuals expecting to owe Louisiana tax | IT-540ES |
| Feb 1, 2027 | Federal | 2026 Forms W-2 filed with the SSA and furnished to employees January 31 falls on a Sunday, so the due date is February 1, 2027. | Employers | W-2, W-3 |
| Jan 31 (rule) | Federal | 2026 Form 1099-NEC furnished to contractors and filed with the IRS January 31, or the next business day when it falls on a weekend. | Businesses that paid contractors | 1099-NEC |
| Feb 1, 2027 | Louisiana | 4th-quarter withholding and annual reconciliation for 2026 | Employers (quarterly and monthly filers) | L-1, L-3 |
| Mar 15 (rule) | Federal | S corporation and partnership returns for calendar year 2026 The 15th day of the 3rd month after the tax year ends; Form 7004 extends filing by six months. | S corporations, partnerships and multi-member LLCs | 1120-S, 1065 |
| Apr 15, 2027 | Federal | Individual return for tax year 2026 | Individuals | 1040 |
| Apr 15 (rule) | Federal | C corporation return for calendar year 2026 The 15th day of the 4th month after the tax year ends; Form 7004 extends filing by six months. | C corporations | 1120 |
| Apr 15 (rule) | Federal | Estate and trust return for calendar year 2026 The 15th day of the 4th month after the tax year closes; Form 7004 extends filing by 5.5 months. | Estates and trusts | 1041 |
| Apr 15 (rule) | Federal | FBAR report for foreign accounts held in 2026 Due the April 15 after the calendar year, with an automatic extension to October 15 and no request needed. | US persons with foreign accounts over $10,000 | FinCEN 114 |
| Apr 15 (rule) | Federal | Estimated tax, 1st installment for 2027 Confirm when the IRS publishes the 2027 Form 1040-ES. | Individuals with untaxed income | 1040-ES |
| Apr 15, 2027 | Louisiana | Estimated income tax, 1st payment for 2027 (individual and corporation) | Individuals and corporations owing Louisiana tax | IT-540ES, CIFT-620ES |
| May 15 (rule) | Federal | Exempt organization return for calendar year 2026 The 15th day of the 5th month after the accounting period ends; Form 8868 requests an automatic extension. | Nonprofits and exempt organizations | 990 |
| May 17, 2027 | Louisiana | Individual income tax return for tax year 2026 May 15 falls on a Saturday, so the 2027 due date is Monday, May 17. | Louisiana resident and nonresident individuals | IT-540 |
| May 17, 2027 | Louisiana | Corporation income and franchise return for calendar year 2026 May 15 falls on a Saturday, so the 2027 due date is Monday, May 17. | Corporations | CIFT-620 |
| May 17, 2027 | Louisiana | Fiduciary income tax return for calendar year 2026 May 15 falls on a Saturday, so the 2027 due date is Monday, May 17. | Estates and trusts | IT-541 |
| Jun 15 (rule) | Federal | Estimated tax, 2nd installment for 2027 Confirm when the IRS publishes the 2027 Form 1040-ES. | Individuals with untaxed income | 1040-ES |
| Jun 15, 2027 | Louisiana | Estimated income tax, 2nd payment for 2027 (individual and corporation) | Individuals and corporations owing Louisiana tax | IT-540ES, CIFT-620ES |
| Sep 15 (rule) | Federal | Estimated tax, 3rd installment for 2027 Confirm when the IRS publishes the 2027 Form 1040-ES. | Individuals with untaxed income | 1040-ES |
| Sep 15, 2027 | Louisiana | Estimated income tax, 3rd payment for 2027 (individual and corporation) | Individuals and corporations owing Louisiana tax | IT-540ES, CIFT-620ES |
| Oct 15, 2027 | Federal | Extended deadline for 2026 individual returns The extension moves the filing deadline, not the April payment deadline. | Individuals who filed Form 4868 | 4868 |
| Six months after the May due date (rule) | Louisiana | Extended deadline to file 2026 Louisiana individual and corporate returns Louisiana grants an automatic six-month extension of time to file; tax is still due by the May due date. | Individuals; corporations with a timely federal extension | R-2868V (individual payment voucher) |
| Dec 15, 2027 | Louisiana | Estimated corporation income tax, 4th payment for 2027 | Corporations owing Louisiana tax | CIFT-620ES |
| The 20th, each month (rule) | Louisiana | Sales and use tax return for the prior month or quarter Due on or before the 20th of the month following the reporting period; the next business day when the 20th is a weekend. | Businesses collecting Louisiana sales tax | LaTAP or paper return |
Federal rows come from IRS.gov form and instruction pages; Louisiana rows from the LDR 2027 filing calendar and its tax pages. Rows marked (rule) state the statutory rule the date follows because the agency has not yet published that date; confirm when the IRS publishes the 2027 calendar. No disaster-relief postponement for Louisiana is posted on those pages as of November 2026.
Three closer looks
- Filing extensions Federal Form 4868 by April 15, the Louisiana automatic extension, and what an extension does not do.
- Estimated tax payments The four quarterly dates for 2027, who must pay, and how to pay Louisiana estimated tax.
- Year-end tax planning Strategy set before filing season begins is what lowers the numbers these deadlines collect.
Dates we watch for you.
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