Filing taxes late is generally bad if you owe money, resulting in a failure-to-file penalty of 5% of the unpaid tax per month (up to 25%), plus a 0.5% monthly failure-to-pay penalty and interest. If more than 60 days late, penalties can reach $525 or 100% of the unpaid tax. If you are due a refund, there is no penalty for filing late.
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.
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.
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).
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.
If you file for an extension by April 15, you can extend your filing deadline to Oct. 15, 2026, but any tax owed must still be paid by the April 15 deadline to avoid interest and penalties.
If you have a balance owing, the CRA may charge interest and a late-filing penalty on returns filed after the due date. If you file your return after April 30, your GST/HST credit, climate action tax credit, Canada child benefit and B.C. family benefit, and Old Age Security benefit payments may be delayed.
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.
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.
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.
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).
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.
Sound reasons, if established, include:
Walter Anderson, an entrepreneur and billionaire, was convicted of the largest tax evasion case in American history. At the time of his conviction, he owed the United States government nearly a quarter of a billion dollars in back taxes. Perhaps the most notorious tax evasion scandal of all is that of Al Capone.
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.
Most taxpayers will do anything they can to avoid tax audits. Filling out an accurate tax return is the best way to avoid an audit. Additionally, you should ensure you double-check your math and only claim legitimate tax deductions. E-filing may also be helpful.
See Topic no. 202 for information about payment options. 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%.
To avoid the 22% tax bracket (or any higher bracket), focus on reducing your taxable income through strategies like maxing out 401(k)s and HSAs, deferring bonuses, tax-loss harvesting, smart charitable giving, and strategic asset location, understanding that higher rates only apply to income within that bracket, not your entire income.
What is a 1099-K form? IRS Form 1099-K is a tax document that reports any payments you received through third-party networks like Venmo, PayPal, or Apple Pay. If you receive more than $20,000 in at least 200 transactions through these platforms, you'll likely get a 1099-K.