Filing a late tax return typically results in a failure-to-file penalty of 5% of the unpaid tax per month (up to 25% total), plus interest, and a potential minimum penalty of $525 for returns due in 2026. If you are owed a refund, no penalty applies, but you must file within three years to claim it.
You might have to pay IRS penalties and interest if you file your federal income tax return after the April deadline, your due date isn't extended, and you end up with a tax bill. First, the IRS charges a 5% penalty per month on any tax due if your return is filed late. The penalty is capped at 25% of the tax owed.
The 'Failure to Lodge on Time' (FTL) Penalty
This penalty is not a flat fee; it is calculated using a system of 'penalty units' that increase every 28 days your return is overdue.
Interest will be charged on late payments after this date. If HMRC have asked you to complete a tax return for 2024/25, and you miss the deadline, you'll automatically be fined regardless of how small your tax liability is. A penalty will also apply if you are due a refund.
The penalty for late filing of ITR is Rs. 1,000 for income up to Rs. 5 lakhs and Rs. 5,000 for higher incomes, plus 1% monthly interest on unpaid tax.
An updated return can be filed at any time within 48 months [12 months till 31-03-2025] from the end of the relevant assessment year.
If you file taxes after the October 15 extension deadline, the IRS will assess penalties and interest, primarily a failure-to-file penalty (5% per month, max 25%), plus a separate failure-to-pay penalty (0.5% per month) and daily interest on the unpaid taxes, though you can request penalty abatement for reasonable cause like natural disasters. The October deadline is for filing, not paying; if you owe, payment was due in April, so you'll likely face both penalties and interest until you file and pay, but you won't be penalized if you're due a refund.
Acceptable reasons include serious illness, natural disasters, or other events beyond your control that prevented timely tax filing or payment. However, ignorance of the law, relying on an advisor, and lack of funds are generally not treated as reasonable causes.
No Statute of Limitations for Unfiled Returns
The IRS does not apply a statute of limitations to unfiled tax returns. The clock that limits how long the IRS can assess tax or pursue collection does not start until a tax return is actually filed.
If you don't file taxes for a year and owe money, you face significant penalties and interest, including a 5% per month failure-to-file penalty (up to 25%), a separate failure-to-pay penalty, and accruing interest, potentially leading to wage garnishment, bank levies, and even criminal charges in extreme cases; however, if you are due a refund, there's no penalty, but you must file within three years to claim it.
The biggest tax mistakes people make include filing late, math errors, incorrect personal info (like Social Security numbers), forgetting deductions/credits (like EITC), misreporting income, not signing forms, and making errors with bank details for direct deposit, all leading to delays, penalties, or missed savings, with using tax software or professionals helping avoid these common pitfalls.
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 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.
Sound reasons, if established, include:
The law gives procrastinators three years to submit a return and claim a refund. The three-year countdown starts on the original due date of the return or the extension due date, if an extension was filed.
As time goes on, the way your tax penalty is assessed changes: For each month or part of a month that your tax return was late, the combined maximum penalty is 5% (4.5% late filing and 0.5% late payment), up to 25% of the unpaid tax at the time of filing.
Potential Criminal Charges
Luckily, the government has a limited amount of time in which it can file a criminal charge against you for tax evasion. If the IRS chooses to pursue charges, this must be done within six years after the date the tax return was due.
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.
Pay a Self Assessment penalty
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%.
If you filed your tax return late due to reasons outside of your control, you might consider appealing the late filing penalty on the grounds of having a 'reasonable excuse'. You will normally need to submit your appeal within 30 days of receiving the penalty notice.
But here's generally what you can expect. No penalty if you're getting a tax refund. However, you must file your 2025 taxes by April 15, 2029 (or October 15, 2029 if you filed an extension). After that, any unclaimed tax refund gets turned over to the US Treasury.
If you missed filing a return within the original deadline, you can file a belated return within 31st December of the relevant assessment year. If you miss this deadline too because of genuine reasons then you may file a condonation of delay request and ask the income tax authorities to condone the delay.
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).