Late Tax Filing Penalties: What the IRS and CRA Assess

Quick Answer

Late tax filing is triggered the moment a return is not submitted by its statutory deadline, regardless of whether tax is owed.

• ›The IRS failure-to-file penalty begins at 5 percent of unpaid tax per month, up to 25 percent
• ›The CRA late-filing penalty is 5 percent of the balance owing, plus 1 percent per additional month
• ›Interest accrues daily from the original due date, not from the filing date
• ›A return filed three months late with $20,000 owing can generate $3,000 in combined IRS penalties before the first interest charge
• ›Both the IRS and CRA offer structured correction paths, but access to the most favorable terms closes once the agency initiates contact

Filing late is recoverable. Waiting longer is not free.

A late tax filing occurs when a federal or provincial tax return (Form 1040, Form 1120, T1, T2, or an information return) is submitted after its statutory due date without a valid extension in place. Penalties attach to the filing failure independently of any tax owed.

A corporation extends its Form 1120 to October 15 but does not pay the estimated balance by April 15. A self-employed individual files the T1 on June 14 but carries a balance owing that has been accruing interest since May 1. A business owner files personal returns for three years but never confirms that the corporate T2 was actually submitted. An S corporation misses the March 15 deadline because the owner assumed it matched the personal April 15 date. A company with 40 contractors files 1099-NEC for 35 and misses 5.

None of these taxpayers expected a penalty. All of them had one accruing before they were aware of it. In TYM engagements, combined failure-to-file penalties on returns filed more than 12 months past deadline have ranged from $6,800 to $41,000 per entity before interest. A Miami-based corporation that filed its 2020 and 2021 Form 1120 returns simultaneously in late 2022 faced $31,000 in combined penalties; through IRS Penalty Resolution, the resolved liability was $8,400, recoverable only because the engagement began before IRS collections escalated.

This article covers how late filing penalties are calculated for both agencies, who faces them and when they trigger, the most common mistakes that increase cost, and the structured recovery path for returning to compliance.

Where the Exposure Accumulates

The following situations represent the most common late-filing exposure patterns encountered in TYM engagements. In each case, the penalty was accruing before the taxpayer was aware of it.

• ›A corporation extended its Form 1120 to October 15 but did not pay the estimated balance by April 15; interest began accruing from April 15, not from October
• ›A self-employed individual filed the T1 one day before the June 15 deadline but had a balance owing that had been accruing interest since May 1
• ›A business owner filed personal returns for three years but did not file the corporate T2 because the accountant “handled it” and the owner never confirmed submission
• ›An S corporation missed the March 15 filing deadline and was unaware the deadline differed from the personal April 15 return
• ›A company with 40 contractors filed Form 1099-NEC for 35 and missed 5; the IRS assessed $340 per form for filing after August 1, totaling $1,700
• ›A cross-border individual filed the U.S. return on time but failed to file the Canadian departure return, triggering CRA late-filing penalties on the deemed disposition of assets

Each of these taxpayers had penalties accruing before they realized a deadline had passed. Late filing exposure is a function of time, not of intent.

Who Faces Late Filing Penalties (and When They Trigger)

Late filing risk applies across entity types, jurisdictions, and income levels. Individuals who miss the April 15 (U.S.) or April 30 (Canada) deadline face penalties even if an extension was filed but the balance was not paid by the original due date. Corporations whose T2 or Form 1120 was not filed within the statutory period after fiscal year-end are subject to separate penalty structures.

Self-employed individuals in Canada who have until June 15 to file still owe interest from April 30 if a balance was outstanding. Incorporated professionals whose T1 and T2 are linked face cascading risk: a late T2 can delay the T1 if salary or dividend figures are not finalized.

Businesses with unfiled information returns (Forms 1099-NEC, T4, T5013) face per-form penalties that compound across a large payroll. For late US tax filings, the entity type determines which penalty schedule applies.

How the IRS and CRA Calculate Late Filing Penalties (and How They Stack)

IRS penalty structure:

Failure-to-file (FTF): 5 percent of unpaid tax per month, capped at 25 percent. Failure-to-pay (FTP): 0.5 percent per month, capped at 25 percent. When both apply, FTF drops to 4.5 percent; combined rate stays at 5 percent. Maximum combined penalty: 47.5 percent (22.5 percent FTF plus 25 percent FTP) before interest.

Interest: Federal short-term rate plus 3 percent, compounded daily, approximately 7 to 8 percent annually as of early 2026.

Information return penalties (2025 tax year): 1099-NEC filed within 30 days late: $60 per form. Between 31 days and August 1: $130. After August 1: $340. Intentional disregard: $680, no maximum.

CRA penalty structure:

T1/T2 late-filing penalty: 5 percent of the balance owing plus 1 percent per additional complete month, maximum 12 months, for a maximum first-year penalty of 17 percent. Repeat late filers: 10 percent plus 2 percent per month, maximum 20 months, for a maximum of 50 percent.

CRA interest: Prescribed rate, compounded daily from the filing deadline. The rate changes quarterly and has been elevated since 2022.

Common Late Filing Mistakes (That Increase the Cost)

Filing an extension without paying the estimated balance is the most frequent miscalculation. The extension defers the filing deadline, not the payment deadline. Interest and FTP accrue from the original due date regardless.

Assuming the corporate return was filed because the accountant said it would be handled: without confirmation, the return may sit unfiled for years while the penalty clock runs. In TYM engagements, this pattern has produced penalty assessments exceeding $20,000 on returns where the underlying tax liability was under $5,000.

Waiting to file because the balance cannot be paid in full is equally costly. Filing stops the FTF penalty, the faster-accruing component. FTP continues at one-tenth the rate. The return should always be filed even without payment.

Ignoring information return deadlines creates exposure that scales with headcount. Per-form penalties on 1099-NEC, T4, and T5013 are assessed separately. A business with 100 unfiled 1099s that surfaces the issue after August 1 faces a $34,000 minimum penalty.

What Happens When Late Filings Go Unresolved?

For unfiled returns, the IRS statute of limitations for assessment does not begin. The IRS can assess penalties indefinitely for years where no return was filed, making late filing materially different from a filed return with an error. The CRA has parallel enforcement mechanisms, including garnishment and bank setoff, that activate once a formal demand has been issued.

The IRS minimum failure-to-file penalty for returns filed more than 60 days after the deadline is the lesser of $510 or 100 percent of the unpaid tax (2025, indexed). For S corporations, the penalty is $245 per shareholder per month (2025 rate), up to 12 months, accumulating rapidly for multi-shareholder entities.

What Does Late Filing Actually Cost? (Real Engagement Outcomes)

1. 1Incorporated professional (Canada, 3 years unfiled T2): $41,000 in CRA penalties and interest. After taxpayer relief application filed within the ten-year window: $9,200. The reduction was available only because the application was submitted before CRA escalated to formal collection.
2. 2S corporation (U.S., 14 months late, 2 shareholders): $245 per shareholder per month for 14 months totaled $6,860, plus a separate FTP penalty on estimated tax. After first-time abatement: $0 on the per-shareholder penalty. FTP remained.
3. 3Contractor-heavy business (U.S., 45 late 1099-NEC forms): IRS assessed $340 per form ($15,300) because the forms were filed after August 1. After engagement: $15,300. First-time abatement was unavailable for information return penalties.
4. 4Cross-border individual (Canadian departure return not filed): Deemed disposition of a rental property triggered capital gains tax; the 17 percent maximum late-filing penalty added $8,100 to a $47,600 liability. After CRA taxpayer relief submission: $4,200 in penalty reduction.

Corrective action within the first 90 days of a missed deadline reduced total penalty exposure by 40 to 75 percent in these engagements. After 12 months, the available relief options narrow and the recoverable amounts decrease.

Practical Checklist: Late Filing Recovery

• ›Confirm which returns are outstanding: federal, state/provincial, and information returns are separate obligations
• ›File all outstanding returns immediately, even without full payment: the FTF penalty stops accruing on the date of filing
• ›Assess FTA eligibility before preparing a written reasonable cause submission: FTA is faster and does not require documentation
• ›Evaluate taxpayer relief eligibility under RC4288 within the ten-year window: document the circumstances that caused the late filing
• ›Calculate the balance owing plus accrued interest and penalties: confirm the figure with the IRS or CRA account transcript before making any payment
• ›Establish a formal payment arrangement for balances that cannot be paid in full, before the agency escalates to enforcement
• ›Address cascading return dependencies in sequence: a late T2 affecting the T1, or a late K-1 affecting shareholders’ 1040s
• ›Review information return obligations separately: 1099-NEC, T4, T5013 have independent deadlines and penalty structures
• ›Set a calendar-based filing compliance system that flags deadlines 60 days in advance across all entity types

What Happens If Late Filings Go Unresolved? (Recovery Path)

The single most important action is filing the return, even without payment. Filing stops the FTF penalty. For the IRS, urgency increases after 60 days, when the $510 minimum penalty applies. The following steps reflect the sequence TYM uses in late-filing recovery engagements.

Step 1: Identify every outstanding return across all jurisdictions and entity types.

Federal, state, provincial, and information returns must be cataloged before any filing occurs. Filing one return without awareness of others can trigger cross-referencing that increases scrutiny. In TYM engagements, a full filing inventory prevents cascading complications.

Step 2: Assess abatement and relief eligibility before filing.

For the IRS, first-time abatement eliminates FTF and FTP penalties for taxpayers with a clean three-year history. Reasonable cause abatement requires documentation that the failure resulted from circumstances beyond the taxpayer’s control. For the CRA, the taxpayer relief program (RC4288) allows penalty cancellation for extraordinary circumstances within a ten-year window.

Step 3: Sequence filings to minimize cumulative penalty exposure.

Filing order matters. Corporate returns that feed into personal returns (T2 before T1, K-1 before 1040) must be sequenced correctly. Abatement applications should be coordinated so that relief on one year does not disqualify relief on another.

Step 4: Establish ongoing compliance infrastructure to prevent recurrence.

For balances that cannot be paid in full, the IRS offers streamlined installment agreements (under $50,000, within 72 months). The CRA allows formal payment arrangements that prevent enforcement action. Interest continues under both. A recurring filing calendar with 60-day advance alerts eliminates the most common cause of repeat late filings.

FAQ

What happens if a tax return is filed late but no tax is owed?

The FTF penalty is based on unpaid tax. If no balance is owing, no penalty applies under either the IRS or CRA. However, information return penalties for T4s, 1099s, and similar forms apply regardless of tax owed.

Can the IRS penalty for filing late be waived?

First-time abatement (FTA) eliminates FTF and FTP penalties for taxpayers with no penalties in the three preceding years. Reasonable cause abatement requires documentation that the failure resulted from circumstances beyond the taxpayer’s control. Neither waives interest.

What is the CRA taxpayer relief program and how does it work?

CRA taxpayer relief allows cancellation of penalties and interest where extraordinary circumstances (serious illness, natural disaster, or CRA error) prevented compliance. Applications on Form RC4288 are reviewed case-by-case within a ten-year window. Documentation is required, and the strength of the factual showing determines the outcome.

How long does the IRS have to assess penalties for a late filing?

Three years from the date a return is filed. For an unfiled return, the limitations period never begins. The IRS can assess penalties indefinitely for years where no return was submitted, making unfiled returns materially different from filed returns with errors.

What is the S corporation late-filing penalty?

The penalty is $245 per shareholder per month (2025 rate), up to 12 months. A two-shareholder S corporation filing 12 months late faces $5,880, separate from any income tax penalty. First-time abatement can eliminate this penalty if the entity has a clean three-year history.

Is there a minimum penalty for filing more than 60 days late?

Share this article