Late corporate return penalties

What triggers this penalty

• Filing a required corporate income tax return after the applicable deadline or valid extended deadline.
• Missing a required S corporation return or required information on that return.
• Confusing an extension to file with an extension to pay the corporation’s tax.

Potential amount

• For Form 1120, the basic failure-to-file penalty is generally 5% of unpaid tax for each month or fraction of a month, up to 25%; coordination with failure-to-pay penalties can affect the calculation.
• For Form 1120-S, the information return penalty generally uses an inflation-adjusted amount per shareholder per month or fraction, for up to 12 months, even without entity-level tax.
• Minimum late-filing rules and other penalties may apply. An S corporation with tax due can also face tax-based charges; separate Form 5472 penalties are not measured by the corporation’s unpaid income tax.

Common situations

• A C corporation files late while a tax balance remains unpaid.
• An S corporation has no entity-level tax but misses the annual filing deadline.
• A foreign-owned corporation files Form 1120 but omits its required Form 5472.

Identify the return before using a formula

C corporation and S corporation penalties are not interchangeable. Confirm the entity’s election status and required return for the year. For S corporation information penalties, review the shareholders present during the year, rather than assuming only year-end ownership matters for the calculation.

Filing and paying are separate duties

A valid filing extension generally does not extend the time to pay. Verify payment dates, balances and extension records. A corporation should not delay filing merely because it cannot pay; filing and payment issues need separate attention, and interest can continue even when a penalty is under review.

Review international attachments separately

A foreign-owned corporation may have additional information reporting duties. A pro forma Form 1120 submitted by a foreign-owned disregarded entity is not the same as a regular taxable C corporation return. Analyze the entity’s classification before treating a notice as an ordinary corporate late-filing charge.

What to do after receiving a notice

• Read every page of the notice, identify the form, tax period and legal basis, and record the response deadline immediately. Do not ignore the notice while you investigate whether the assessment is correct.
• Gather the filed return, attachments, extension requests, delivery confirmations and correspondence. Compare the IRS calculation with your records before accepting the amount or disputing it; a filing error and an IRS processing error require different explanations.
• Respond through the address or method stated in the notice, keep a complete copy and proof of timely delivery, and review any appeal rights. Do not assume that a telephone call or a pending relief request suspends another deadline.

Is penalty relief available?

• Relief may be available depending on the facts. Identify the specific penalty and the applicable relief standard before choosing a procedure; eligibility for one type of relief does not establish eligibility for another.
• If reasonable cause is relevant, prepare a truthful, dated account of what prevented compliance, what steps you took to comply, and how quickly you corrected the problem. Support the explanation with records rather than a generic claim that you did not know the rule.
• Chirino USA can review the filing history, notice and supporting evidence to help evaluate correction and response options. Filing the missing information does not itself cancel an assessed penalty or guarantee that the IRS will accept a relief request.