Tax Day 2027: Filing Deadline, Extension and Key Dates
Money | Updated August 30, 2026
Tax season comes around every year, but the deadlines are easy to miss — and missing them is expensive. This guide gives you the verified 2027 tax calendar: when Tax Day is, how extensions really work, the quarterly estimated tax dates, IRA contribution deadlines, state differences, and what the penalties cost if you are late.
When Is Tax Day 2027?
Tax Day 2027 is Thursday, April 15, 2027. This is the deadline to file your federal income tax return for tax year 2026. Since April 15 falls on a weekday, there are no weekend or holiday adjustments — the deadline stays exactly on April 15. In most years the IRS begins accepting returns in late January, so you do not need to wait until the deadline to file.
Most states mirror the federal April 15 deadline, but a few give residents more time. Delaware and Iowa have an April 30 deadline, Hawaii April 20, Louisiana May 15 and Virginia May 1. If you live in one of those states, check your state tax authority for the exact date that applies to you.
How a Tax Extension Really Works
If you need more time, you can file Form 4868 by April 15, 2027 to get an automatic six-month extension. That moves your filing deadline to October 15, 2027. The critical point most people miss: an extension extends time to file, not time to pay. Any taxes you owe are still due by April 15, 2027, whether or not you file an extension.
If you owe money and file an extension without paying, you will face interest and the 0.5% per month late-payment penalty on the unpaid balance — even though your return is not officially "late." For example, owing $5,000 and waiting six months to pay could add roughly $150 in penalties plus about $200 in interest. The practical rule is simple: if you cannot file by April 15, at least estimate and pay what you owe.
2027 Tax Calendar At a Glance
| Date | What's due |
|---|---|
| January 15, 2027 | Q4 2026 estimated tax payment |
| January 31 / February 1, 2027 | W-2 and 1099 forms (Jan 31 falls on a Sunday, so due Feb 1) |
| March 15, 2027 | Partnership and S-corp returns (2026) |
| April 15, 2027 | 2026 individual return + extension; Q1 2027 estimated tax; 2026 IRA contribution deadline |
| June 16, 2027 | Q2 2027 estimated tax (June 15 is a Sunday, so deadline shifts to June 16) |
| September 15, 2027 | Q3 2027 estimated tax; extended partnership/S-corp returns |
| October 15, 2027 | Extended individual return deadline |
Estimated Tax Payments for 2027
If you are self-employed, a freelancer or a gig worker, you generally pay taxes quarterly through estimated payments. For the 2027 tax year, the payments and their due dates are:
| Quarter | Income period | Due date |
|---|---|---|
| Q1 | January 1 – March 31, 2027 | April 15, 2027 |
| Q2 | April 1 – May 31, 2027 | June 16, 2027 |
| Q3 | June 1 – August 31, 2027 | September 15, 2027 |
| Q4 | September 1 – December 31, 2027 | January 15, 2028 |
Note the calendar quirk: in 2027, June 15 falls on a Sunday, so the Q2 payment moves to Monday, June 16. The quarterly schedule is also uneven — Q2 covers only two months while Q3 and Q4 each cover three — a legacy of the tax year's original March 1 start that the IRS never realigned.
IRA and Retirement Contribution Deadlines
April 15, 2027 is the last day to make Traditional or Roth IRA contributions that count toward the 2026 tax year. This is a common planning opportunity: you can contribute for 2026 up to the annual limit all the way until Tax Day 2027. The 401(k) employee contribution deadline for the 2026 tax year was December 31, 2026, so IRAs are the main way to add retirement savings after the year ends.
What Happens If You File Late?
The IRS applies two separate penalties. The failure-to-file penalty is 5% of the unpaid tax per month, up to a maximum of 25%. The failure-to-pay penalty is 0.5% per month, plus interest that compounds daily. On a $10,000 tax bill, filing two months late without paying can cost more than $1,100 in penalties alone. If you miss a deadline, file as soon as possible — penalties stop accumulating once you file.
Tips to File Faster and Avoid Penalties
- File early: the IRS opens the filing season in late January, and e-filing with direct deposit is the fastest way to get your refund.
- Gather documents now: W-2s, 1099s, and deduction records are what cause most delays.
- Use e-file and direct deposit: refunds arrive fastest this way.
- If you cannot pay in full: set up an IRS payment plan or pay what you can by April 15 to minimize penalties and interest.
Verified Official Sources
- Source: IRS — When to File
- Source: IRS Publication 509 — Tax Calendars
- Source: Jackson Hewitt — Tax Deadlines 2027
Frequently Asked Questions
When is Tax Day 2027?
Thursday, April 15, 2027 — the deadline to file your 2026 federal return or request an extension.
Does an extension extend the payment deadline?
No. An extension (Form 4868) extends filing to October 15, 2027, but taxes owed are still due by April 15, 2027.
When are estimated tax payments due in 2027?
Q1 April 15, Q2 June 16 (June 15 is a Sunday), Q3 September 15, and Q4 January 15, 2028.
When is the last day to make a 2026 IRA contribution?
April 15, 2027 — the Tax Day deadline for Traditional and Roth IRA contributions for the 2026 tax year.
Are there penalties for filing late?
Yes: 5% per month for failure to file (up to 25%) and 0.5% per month for failure to pay, plus daily interest.
