Missing April 15 or October 15 triggers IRS penalties immediately — but the total damage depends on how quickly you act. Filing within 60 days of the deadline limits the minimum penalty to $485. After that, the calculation changes.
TYM CPAs file late returns, apply for penalty abatement, and establish payment arrangements — in the order that minimizes total liability. The process is structured and documented.
The IRS penalty structure has three distinct phases. Each phase reduces the abatement options available.
Specific dates and amounts that determine your options.
| Deadline / Threshold | What It Means | Action Required |
|---|---|---|
| April 15 | Original filing deadline for individuals (Form 1040) | File or request extension by this date |
| April 15 + 6 months | Extension deadline (October 15) — extends filing, not payment | Tax owed must be paid by April 15 regardless of extension |
| 60 days after deadline | Minimum penalty of $485 locks in | File before day 60 to avoid minimum penalty |
| 5 months after deadline | Failure-to-file penalty caps at 25% of unpaid tax | Failure-to-pay continues at 0.5%/month after this |
| IRS notice received | SFR or CP2000 — IRS has acted on your behalf | Respond within 30 days; dispute with CPA-prepared return |
| 10 years from assessment | Collection statute expires | IRS cannot collect after this date — but can still assess on unfiled returns |
The client had filed a Form 4868 extension in April but missed the October 15 deadline by 4 months. The tax owed was $18,200 — primarily from US rental income on a Florida property. Penalties had accumulated to $8,400 including failure-to-file, failure-to-pay, and interest.
TYM reviewed the client's filing history and confirmed no penalties in the prior three years. A First-Time Abatement request was filed simultaneously with the late return. The IRS accepted the abatement and removed $7,100 in penalties. The remaining $1,300 in interest was not eligible for abatement but was included in a 12-month installment agreement.
The client's total out-of-pocket cost was $18,200 (tax) + $1,300 (interest) — versus $26,600 without abatement. The resolution was completed in 9 weeks from engagement.
Missed deadlines happen for different reasons. The resolution path depends on the situation.
The extension extends the filing deadline — not the payment deadline. Tax owed by April 15 continues to accrue failure-to-pay penalties and interest through October 15 and beyond.
No extension on file means the failure-to-file penalty (5%/month) started the day after April 15. Filing within 60 days limits the minimum penalty to $485.
Self-employed individuals and business owners who missed Q1–Q4 estimated payments face underpayment penalties. These are separate from failure-to-file and require Form 2210.
US citizens and green card holders living in Canada have an automatic 2-month extension to June 15 — but tax owed is still due April 15. Many are unaware of this distinction.
Form 1065 (partnerships) and Form 1120-S (S-corps) are due March 15. Late partnership returns carry $245/partner/month penalties — these accumulate faster than individual return penalties.
A CP2000 or CP3219A notice means the IRS has already acted. The response window is 30–60 days. A CPA-prepared return filed in response almost always produces a lower liability than the IRS assessment.
Resolution is structured around minimizing total liability — not just filing the return.
TYM calculates the current penalty balance, identifies the applicable deadline tier, and determines which abatement programs are still available. This assessment drives the filing strategy.
Returns are prepared with full documentation — income, deductions, credits, and carryforward items. A CPA-prepared return consistently produces a lower liability than an IRS Substitute for Return.
FTA requests are filed simultaneously with the return when the client qualifies. Timing is critical — FTA is only available before the IRS assesses the penalty through an SFR or automated system.
When FTA is not available, TYM prepares a reasonable cause abatement request documenting circumstances (illness, natural disaster, reliance on advisor, IRS error) that justify penalty removal.
TYM responds to CP2000, CP3219A, and SFR notices within the required window, disputes incorrect assessments, and files correct returns with supporting documentation.
When the remaining balance exceeds available funds, TYM negotiates installment agreements or Currently Not Collectible status — preventing liens, levies, and passport restrictions.
TYM reviews the missed deadline, calculates current penalties, and identifies abatement options. This establishes the resolution strategy before any filing begins.
A structured checklist is provided based on the return type. TYM requests IRS transcripts to confirm what the IRS has on file and identify any existing assessments.
The late return is prepared with full documentation. For IRS notice responses, the return is prepared to directly address the discrepancy identified in the notice.
FTA or reasonable cause abatement is filed with the return or immediately after. The request includes all supporting documentation required by IRS abatement procedures.
TYM monitors IRS processing, responds to follow-up correspondence, and confirms penalty adjustments on the account transcript.
If a balance remains after abatement, TYM establishes the appropriate payment arrangement and confirms the account is in good standing.
Late filing engagements are priced per return based on complexity and the presence of IRS notices.
Abatement requests are included in the engagement fee. Exact fees are confirmed after the filing scope review.
TYM's Miami office handles late federal returns for individuals and businesses in South Florida. Florida has no state income tax, so the focus is on federal resolution — penalties, abatement, and payment arrangements with the IRS.
TYM's Toronto office serves Canadian residents who missed US filing deadlines — including US citizens abroad, Canadians with US rental income, and cross-border employees. The automatic 2-month extension for overseas filers does not extend the payment deadline.
For multiple unfiled years — not just one missed deadline. TYM reconstructs records and files in sequence to minimize total liability.
Understand the full range of IRS penalties — failure-to-file, failure-to-pay, accuracy, and trust fund — and how each is resolved.
When the IRS has already contacted you, TYM handles all communication and negotiation under Power of Attorney.
Overview of all US tax compliance and resolution services TYM provides for individuals and businesses.
Penalties cannot be eliminated retroactively, but they can be abated. First-Time Abatement removes penalties for one tax year if you have a clean compliance history. Reasonable cause abatement applies when documented circumstances justify the delay. Filing immediately stops further accumulation and preserves abatement options.
A valid extension (Form 4868) prevents the failure-to-file penalty — but only if you owe no tax. If tax is owed, the failure-to-pay penalty (0.5%/month) and interest begin April 15 regardless of the extension. The extension only extends the filing deadline, not the payment deadline.
Missing October 15 triggers the same failure-to-file penalty as missing April 15: 5% of unpaid tax per month, up to 25%. The 60-day minimum penalty rule ($485) applies from October 15, not April 15. Filing within 60 days of October 15 limits the minimum penalty.
Yes — and this is strongly recommended. Filing without paying stops the failure-to-file penalty (5%/month) while the failure-to-pay penalty (0.5%/month) continues. The combined penalty for not filing and not paying is 5% per month. Filing immediately reduces that to 0.5% per month on the unpaid balance.
A single-year late return with abatement typically resolves in 6–10 weeks from engagement to IRS confirmation. IRS notice responses take 8–12 weeks depending on the IRS processing queue. TYM provides a timeline estimate after the initial filing scope review.
The content on this page is for informational purposes only and does not constitute professional tax or legal advice. IRS penalty amounts, abatement eligibility criteria, and filing deadlines are subject to change. The case study describes a specific engagement and is not representative of all outcomes. Confirm current obligations and options with a licensed CPA or tax attorney before acting on any information presented here.