When are taxes due? 2026 tax deadlines and the last day to file

When are taxes due?

Your 2025 federal income tax return is due Wednesday, April 15, 2026. That single date carries three separate obligations: file the return, pay what you owe, and make your first 2026 estimated tax payment if you owe estimated tax. Here is the full 2026 calendar for an individual calendar-year filer.

The dates come from the IRS rule that a return is due on the 15th day of the fourth month after the end of your tax year, with two shifts applied. When the 15th lands on a Saturday, Sunday or legal holiday, the IRS moves the deadline to the next day that is not one of those. That is why the partnership deadline reads March 16 rather than March 15 in 2026, and why W-2s are due February 2 rather than January 31.

April 15, 2026 is a Wednesday, so the individual deadline does not shift at all this year. If you have been carrying a vague memory that Tax Day sometimes lands on the 17th or the 18th, that was a different year.

When is the last day to file taxes?

The last day to file your 2025 return without an extension is April 15, 2026. If you filed Form 4868, the last day is October 15, 2026. Those are the only two answers, and which one applies to you was decided back in April by whether you sent the extension request.

The wording matters more than it looks. People search for the last day to file and mean one of three different things, so here is each one separated out.

That last row is the one worth reading twice. An extension moves your paperwork deadline and nothing else.

On the question of what time on the day: an e-filed return is on time if it is transmitted by midnight in your own local time zone on the deadline. A mailed return is on time if it is postmarked by that date, not received by it, which is why the post office matters and the collection time on the box matters more.

When are taxes due with an extension?

October 15, 2026. Form 4868 gives you an automatic six-month extension of time to file, and automatic means exactly that: you do not need a reason, and the IRS does not write back to approve it. Submit it by April 15 and the extension exists.

What the extension does not do is give you more time to pay. The IRS states it plainly: an extension of time to file is not an extension of time to pay. If you owed tax on April 15, 2026 and did not send it, two separate charges have been accruing.

Look at the gap between rows two and three. Filing the extension is worth doing even when you cannot pay a cent, because the failure to file penalty is ten times the size of the failure to pay penalty. A person who owes $5,000 and files nothing is charged $250 a month. The same person who filed a four-line extension form is charged $25 a month. The form costs nothing and takes minutes.

If you are reading this in the run-up to October 15, 2026 with an extension on file, your task is the return itself, and there is no further extension after that date. TaxFile prepares your federal and state return from the documents you upload and e-files it through an authorized IRS e-file provider once you approve it. If you are also carrying a balance, our guide to what to do if you cannot pay your taxes covers the IRS payment plans, and filing taxes late covers where you stand if the deadline has already passed.

When are quarterly taxes due?

Estimated tax payments for the 2026 tax year are due April 15, 2026, June 15, 2026, September 15, 2026 and January 15, 2027. They are called quarterly, but the periods they cover are not three months each, which is the detail that trips up first-time payers.

The IRS lets you skip the January 15, 2027 payment entirely if you file your complete 2026 return by February 1, 2027 and pay the whole balance with it. That is a real option for anyone whose books are already closed in January.

You generally owe estimated tax if you expect to owe at least $1,000 after withholding and refundable credits. You avoid the underpayment penalty by hitting one of the safe harbors below, and hitting a safe harbor protects you even if you end up owing a large balance at filing time.

The prior-year safe harbor is the useful one when your income is growing, because it is a fixed number you already know in January. If at least two thirds of your gross income for 2025 or 2026 comes from farming or fishing, the 110% rule does not apply to you.

One more route that most self-employed filers overlook: withholding counts as if it were paid evenly across the year no matter when it actually happened. If you or a spouse also hold a W-2 job, raising that withholding late in the year can repair an underpayment that a December estimated payment cannot. Our quarterly tax calculator works out what each installment should be, and how to pay quarterly taxes walks through the payment mechanics.

What happens if you miss the tax deadline?

It depends entirely on whether the IRS owes you or you owe the IRS. If you are due a refund, there is no penalty for filing late, because every late-filing penalty is calculated as a percentage of tax owed and a percentage of zero is zero. If you owe, the charges start the day after the deadline.

Note the phrase "or part month" in the first two rows. Being one day late costs a full month of penalty, so a return finished on the evening of the deadline is materially cheaper than the same return finished the next morning.

If this is your first slip, ask for First Time Abate. The IRS will remove failure to file and failure to pay penalties if you filed the same return type on time for the three prior years, had no penalties assessed in that window, and have filed or extended everything currently due. It is not applied automatically. You have to ask for it, and most people never do.

The deadline that genuinely has no remedy is the refund window. You have three years from the original due date to claim a refund, so an unfiled 2025 return stops being worth money on April 15, 2029. There is no penalty pushing you to file it, and no way to recover it afterward. What happens if you file taxes late goes through the sequence in more detail.

When are business taxes due?

Business deadlines run a month ahead of individual ones for pass-through entities, which surprises people in their first year with an S corporation or a multi-member LLC. The return that feeds your personal return is due before your personal return is.

Partnerships and S corporations extend with Form 7004 rather than Form 4868, and the extension is six months for both. The reason the pass-through deadline sits in March is mechanical: those entities do not pay the tax themselves, they issue a Schedule K-1 to each owner, and the owner needs that K-1 to finish a personal return due in April.

If you run a sole proprietorship or a single-member LLC, none of the March dates apply to you. Your business income goes on Schedule C inside your personal Form 1040, so your only deadline is April 15, 2026, or October 15 with an extension. TaxFile prepares Schedule C and Schedule SE alongside your 1040. See Schedule C software and LLC tax filing for how each entity type is handled.

Deadline exceptions that might apply to you

The April 15 date is the general rule. Several groups get a different date automatically, without filing anything to ask for it.

Disaster relief is the exception most often missed, because it is granted by county and announced after the event. The IRS applies it automatically based on the address on your return, so if you moved into a relief area after filing last year, the automatic match can fail and you may need to call to have the relief applied.

State deadlines are their own question. Most states follow the federal April 15 date, but not all of them do, and a state extension is not always automatic just because you filed a federal one. Delaware and Iowa use April 30, Virginia uses May 1 with an automatic extension to November 1, and Louisiana uses May 15. Check state tax filing for the state you are filing in, or multi-state tax filing if you owe returns in more than one.