Not filing taxes by the October 15 extension deadline results in a failure-to-file penalty, generally 5% of the unpaid tax for each month (or part of a month) the return is late, capped at 25%. For returns over 60 days late, minimum penalties apply, such as $510 or 100% of the unpaid tax, whichever is less.
If you don't file your tax return by the October 15 extension deadline, the IRS charges a failure-to-file penalty of 5% per month (up to 25%) on unpaid taxes, plus a failure-to-pay penalty (0.5% per month), and interest on the total amount due, potentially leading to significant costs, though you can request penalty abatement for reasonable cause, and if you're owed a refund, you generally won't face penalties but risk losing your refund if you wait too long (usually over 3 years).
If you owe tax and don't file on time (with extensions), there's also a penalty for not filing on time. The failure-to-file penalty is usually five percent of the tax owed for each month, or part of a month, that your return is late, up to a maximum of 25%.
Penalties for late filing start at 5% of taxes owed, with additional monthly charges. Interest on unpaid taxes compounds daily, making debts grow quickly. Failure to file can result in loss of government benefits, such as the Canada Child Benefit and GST/HST credits.
Penalty for Late Filing of ITR for FY 2024-25 (AY 2025-26) The last date to file your Income Tax Return (ITR) for Financial Year 2024–25 (Assessment Year 2025–26) is 16 September 2025. If you miss this deadline, a late filing fee of Rs. 5,000 will apply.
You can avoid a penalty by filing and paying your tax by the due date. If you can't do so, you can apply for an extension of time to file or a payment plan.
Failure to file penalties
If you file your return late, a penalty applies. The penalty is 5% of the unpaid tax that is due on the filing deadline, plus 1% of this unpaid tax for each complete month that the return is late, up to a maximum of 12 months.
You can get in trouble immediately for not filing taxes if you owe money, facing failure-to-file penalties (5% monthly, up to 25%) plus interest, but there's no set time limit; the IRS can pursue unfiled returns indefinitely, with the statute of limitations only starting once you file, potentially leading to Substitute for Returns (SFRs), liens, levies, and even criminal charges in severe cases of willful evasion, so filing voluntarily, even late, is crucial to stop penalties from escalating and to claim refunds.
The IRS can waive penalties if you demonstrate that your failure to comply with tax requirements was due to reasonable cause. Acceptable reasons include serious illness, natural disasters, or other events beyond your control that prevented timely tax filing or payment.
In addition to a fine, the ATO can also apply General Interest Charges (GIC), on any amount still owing. Note: The rate for GIC changes quarterly. At the time of writing this article, the rate is 10.61% per annum (October – December 2025).
One-time forgiveness, officially known as First-Time Penalty Abatement (FTA), is an IRS program that allows qualified taxpayers to have certain penalties removed from their tax accounts.
If you don't owe taxes, not filing means no penalties, but you lose out on refunds and credits, like the Earned Income Tax Credit, and can delay benefits like Social Security or loans; you typically have three years to file and claim a refund, but you must file to get your money back. The IRS won't penalize you for late filing if no tax is due, but you won't receive any overpayments or refundable credits until you file.
What is due by October 15 this year? IRS income tax return: Your IRS taxes for the year can no longer be e-filed after this date. A tax extension could reduce your penalties if you filed one by April 15. Estimate potential late payment penalties here; file even if you can't pay and see tips on paying taxes.
IRS Definition
A failure to file penalty is charged on returns filed after the due date or extended due date, absent a reasonable cause for filing late. The combined penalty is 5% (4.5% late filing and 0.5% late payment) for each month or part of a month that your return was late, up to 25%.
You may request up to an additional 6 months to file your U.S. individual income tax return. There are three ways to request an automatic extension of time to file your return. You must request the extension of time to file by the due date of your return to avoid the penalty for filing late.
A One-time Penalty Abatement can be requested in writing or verbally. A One Time Penalty Abatement can be requested online through a MyFTB account by using Authenticated Chat or sending a MyFTB message through your secure account.
The IRS charges 0.5% of your unpaid taxes for each month or part of a month that your taxes remain unpaid. The failure to pay penalty has a maximum charge of 25% of your unpaid taxes. Be sure to pay your taxes within 10 days of the failure to pay notice. After 10 days, the penalty charge increases to 1%.
To avoid the late fee under Section 234F of the Income Tax Act, ensure you file your income tax return on time for the applicable assessment year. If you miss the deadline, you still have the option to submit a belated return by December 31st of the relevant assessment year.
No, you generally cannot skip a year of filing taxes if you meet the IRS filing requirements (income thresholds, self-employment earnings, etc.), as it's a legal obligation that can lead to significant penalties and interest if you owe taxes, though you might not need to file if your income is below the standard deduction and you have no other filing triggers. It's always better to file a late tax return (even if you can't pay immediately) to avoid penalties, especially if you're owed a refund, which you can lose if you file more than three years late.
You might be thinking, “If I've already missed the deadline, what's a few more weeks?” But it's better to file (and pay) late than not at all. The sooner you submit your tax return, the better (we'll get to why in a moment). If you do miss the deadline, do your best to file the next day or soon thereafter.
If you didn't pay enough tax throughout the year, either through withholding or by making estimated tax payments, you may have to pay a penalty for underpayment of estimated tax.
It is relatively rare for a Canadian to be convicted of tax evasion but it does happen. Some Statistics: Between 2019 and 2024 there were 135 convictions with a total of $25.1 million in fines imposed: 58 individuals received jail time totalling 108 years.
If you file your tax return after the due date and have a balance owing, you will be charged a late-filing penalty. Filing late may also cause delays to your benefit and credit payments. If you cannot pay your balance owing, you should still file on time to avoid being charged the late-filing penalty.