The one thing to do today: If you extended your 2025 tax return, file it by Thursday, October 15, 2026. For most people there is no second extension.
Back in April, an extension gave you six more months to file your 2025 return. That time runs out on Thursday, October 15, for both your federal return and your North Carolina return.
In my office, the October rush is usually people waiting on one last form. Waiting past the deadline almost always costs more than filing now and fixing a detail later.
This guide covers what’s due, what it costs to miss it, and what to do if you can’t pay the full balance.
Your federal and NC returns are both due October 15
If you filed Form 4868 (or paid with an extension) by April 15, your 2025 federal return is due Thursday, October 15, 2026. You don’t need a separate NC extension: North Carolina automatically gives you the same extra time when you have a federal one.
On your NC Form D-400, check the box that says you had a federal extension. That’s how NC knows the return isn’t late.
The extension gave you time to file, not to pay
Any tax you owed was still due April 15. If you didn’t pay it all then, interest has been adding up since April 15, even with an extension.
7%
IRS interest a year, compounded daily (Oct–Dec 2026)
7%
NC interest a year (July–Dec 2026)
90%
Paid by April 15? NC waives its late-payment penalty on the rest
What it costs to miss October 15
The late-filing penalty is the expensive one. It is about ten times the late-payment penalty, so filing on time matters even when you can’t pay.
| Penalty | IRS | North Carolina |
|---|---|---|
| Late filing | 5% of the unpaid tax for each month or part of a month, up to 25% | 5% of the tax due for each month or part of a month, up to 25% |
| Minimum if more than 60 days late | $525 or 100% of the tax owed, whichever is less | No minimum listed by NCDOR |
| Late payment | 0.5% of the unpaid tax per month, up to 25% | Separate late-payment penalty (see NCDOR) |
| Interest | 7% a year, compounded daily | 7% a year |
Sources: IRS Topic 653; NCDOR, Penalties and fees.
Getting a refund? There’s no penalty for filing late when you’re owed money. But the IRS usually only pays refunds claimed within three years of the original due date, so don’t let it sit.
Still waiting on a form? File with what you have
The usual holdups are a late K-1 from a partnership or trust, a corrected 1099 from a brokerage, or crypto records. If the missing piece is small, file on time with your best numbers.
If a corrected form arrives later, you can amend the return (Form 1040-X for the IRS, an amended D-400 for NC). An amended return is usually far cheaper than a late-filing penalty.
Can’t pay the full balance? File anyway
File by October 15 even if you can’t pay a dollar. That stops the 5%-a-month late-filing penalty, leaving only the smaller late-payment penalty and interest.
- Pay what you can now through IRS Direct Pay or your IRS online account, and through NCDOR’s online payment page.
- Ask for more time: the IRS offers short-term plans of up to 180 days and longer monthly payment plans.
- A payment plan cuts the penalty: file on time and set up an IRS payment plan, and the late-payment penalty drops to 0.25% a month while the plan is active.
- NC has its own installment plans for balances you can’t pay at once.
Tax rules depend on your situation, so ask before you make changes.
Two October 15 deadlines people forget
FBAR (foreign bank accounts). If your foreign accounts added up to more than $10,000 at any time in 2025, you file a separate FBAR (FinCEN Form 114). Its April deadline was automatically extended to October 15 too. Many families I work with have savings accounts in India or Nepal, so this one matters.
Retirement contributions if you’re self-employed. If you extended, you can usually still make 2025 SEP-IRA contributions, and employer contributions to a solo 401(k), up to the date you file, as late as October 15.
Who gets more time
- Federal disaster areas. The IRS has moved the October 15 deadline to February 1, 2027 for people in certain disaster areas, such as parts of Nebraska, Washington, Indiana, Mississippi and Hawaii County. No North Carolina counties are on the list as of early October.
- Military in a combat zone, who generally get extra time after leaving it.
For everyone else, October 15 is the final date. There’s no second extension.
Before you file: a quick checklist
- Make sure you have every W-2, 1099, K-1 and 1098, including any corrected forms.
- Compare your income with your IRS online account transcript so nothing is missing.
- Count what you already paid: withholding, estimated payments and your April extension payment.
- On the NC D-400, check the federal extension box.
- E-file both returns, and save the acceptance confirmations.
- If you owe, pay what you can or set up a payment plan the same day.
- If you have foreign accounts, file the FBAR separately.
Frequently asked questions
What happens if I miss October 15?
File as soon as you can. The IRS late-filing penalty is 5% of the unpaid tax for each month or part of a month, so every month you wait adds more. Once a return is more than 60 days late, a minimum penalty of $525 (or the tax owed, if less) applies.
Can I get another extension?
Usually not. The six-month extension is the only automatic one. People in IRS-declared disaster areas and military members in combat zones may have more time.
Do I need to file anything separate for North Carolina?
No separate extension form. NC accepts your federal extension. Just check the federal extension box on your D-400 and file it by October 15.
I’m getting a refund. Does the deadline still matter?
There’s no penalty when you’re owed money. But you generally have three years from the original due date to claim a refund, and the sooner you file, the sooner it arrives.
What if I find a mistake after I file?
You can amend: Form 1040-X for the IRS and an amended D-400 for North Carolina. Filing on time and amending later usually costs less than filing late.
I’m new to Triangle Tax. Can you still file my return before the 15th?
It depends on how ready your documents are, so call or text (984) 666-5550 as soon as possible. Upload documents through our secure client portal, never by email.
Need help with this?
As an Enrolled Agent I can deal with the IRS and the NC Department of Revenue for you. Bring your question to a free consultation.
About the author
Yogesh Parajuli, EA is an IRS Enrolled Agent, a licensed North Carolina life and health insurance agent (NC License #18677737) and a notary public. He leads Triangle Tax and Insurance in Cary, NC, and has been preparing taxes since 2016. He helps families and small businesses in English, Hindi and Nepali.
Sources: IRS Topic 653: penalties and interest · IRS: interest rates for Q4 2026 · IRS: tax relief in disaster situations · NCDOR: extensions · NCDOR: penalties and fees · NCDOR: interest rate · WilkinGuttenplan: FBAR deadline 2026