NT 10-K Filing Deadline Explained: When and How the Extension Works

Missing a Form 10-K filing deadline does not necessarily mean a company is immediately out of compliance.

Under Rule 12b-25, an eligible company that cannot complete its annual report on time may file Form 12b-25, commonly referred to as an NT 10-K. Doing so can provide an additional 15 calendar days to submit the Form 10-K.

However, the NT 10-K filing deadline and the extended Form 10-K deadline are two separate dates. Understanding that distinction is important when planning a late filing.

This guide explains when an NT 10-K must be filed, how the 15-day extension works, how filer status affects the original 10-K deadline, and what companies should keep in mind when calculating their extended filing date.

What Is an NT 10-K?

An NT 10-K is a notification filed when a company cannot submit its Form 10-K by the original deadline.

The filing is made on Form 12b-25 and tells the SEC that the annual report will be delayed. It also explains why the filing could not be completed on time and whether the company expects to submit the Form 10-K within the available extension period.

When the applicable requirements are met, filing Form 12b-25 can provide an additional 15 calendar days to complete and submit the Form 10-K.

In practice, the term “NT 10-K” is commonly used to refer to the Form 12b-25 notification associated with a delayed Form 10-K filing.

When Is the Normal Form 10-K Filing Deadline?

Before looking at the NT 10-K filing deadline, it helps to understand when the Form 10-K is normally due.

The deadline depends on the company’s filer status. Large accelerated filers generally have 60 days after fiscal year-end to file Form 10-K, accelerated filers have 75 days, and non-accelerated filers have 90 days.

These deadlines establish the company’s original Form 10-K due date. If the company cannot complete the filing by that date, Form 12b-25 may become relevant as the next step in the filing timeline.

What Is the NT 10-K Filing Deadline?

If a company cannot file its Form 10-K by the original due date, it must submit Form 12b-25, or NT 10-K, no later than one business day after that deadline.

This is separate from the additional time allowed to complete the Form 10-K itself. Once the requirements of Rule 12b-25 are met, the company may receive an additional 15 calendar days to file its annual report.

In practical terms, if a company’s Form 10-K is due on March 2, the NT 10-K would generally be due on March 3, while the extended Form 10-K deadline would fall 15 calendar days after the original due date, on March 17.

The key distinction is that the NT 10-K filing deadline and the extended Form 10-K deadline are not the same date. The NT 10-K must be submitted first to notify the SEC of the delay, while the 15-day period provides additional time to complete the annual report.

How Does the 15-Day NT 10-K Extension Work?

When a company timely files Form 12b-25 and satisfies the requirements of Rule 12b-25, it may receive an additional 15 calendar days to file its Form 10-K.

The distinction between calendar days and business days matters here. The NT 10-K itself is generally due no later than one business day after the original Form 10-K deadline, while the extension for the Form 10-K runs for 15 calendar days.

This extension is part of the formal Rule 12b-25 process. It is not simply an informal request to the SEC for more time.

Is the 15-Day Extension Automatic?

The extension is often described as automatic because a company does not need to wait for the SEC to separately approve the additional 15 days. However, the company still needs to file Form 12b-25 on time and satisfy the applicable requirements under Rule 12b-25.

Filing an NT 10-K therefore should not be viewed as permission to postpone the annual report indefinitely. The additional period is limited, and the company should continue working toward completing the Form 10-K within that window.

Can You File Another NT 10-K for More Time?

No. A company cannot file another NT 10-K for the same reporting period simply to obtain another 15-day extension. The Rule 12b-25 extension is a one-time period.

If the Form 10-K is still not filed by the end of the extension, the filing becomes late. For that reason, companies should treat the 15 days as the maximum available extension rather than the beginning of a series of additional filing periods.

NT 10-K Deadline Example

A simple example can make the timeline easier to understand.

Suppose a company’s normal Form 10-K deadline is March 2. If the company cannot file the annual report by that date, it would generally need to submit Form 12b-25, or the NT 10-K, by March 3, which is one business day after the original deadline.

The filing timeline would look like this:

1. Original Form 10-K deadline: March 2
2. NT 10-K / Form 12b-25 deadline: March 3
3. Extension period begins: after the original Form 10-K deadline
4. Extended Form 10-K deadline: March 17

The key point is that the company does not receive 15 business days. The extension is 15 calendar days from the original Form 10-K due date.

This same framework can be applied to other fiscal year-end dates by first identifying the company’s normal Form 10-K deadline, then determining the Form 12b-25 deadline and the end of the 15-day extension period.

What If the Deadline Falls on a Weekend or SEC Holiday?

If an SEC filing deadline falls on a weekend or federal holiday when EDGAR is closed, the filing is generally due on the next business day.

This can affect the actual date a Form 10-K, NT 10-K, or extended filing is due. Companies should therefore check the SEC holiday calendar when calculating deadlines rather than relying only on a simple calendar-day count.

EDGAR’s operating schedule also matters when planning a submission. The system is generally available on weekdays, excluding federal holidays, and the time a filing is submitted can affect the official filing date it receives.

For that reason, companies should confirm both the applicable deadline and EDGAR availability in advance, particularly when a filing date falls near a weekend or holiday.

What Information Is Included in Form 12b-25?

Form 12b-25 requires a company to provide information explaining the reason for the delayed filing and what it expects to happen next.

The filing generally addresses:

• Why the Form 10-K could not be filed on time
• Whether the company expects to file the Form 10-K within the extended period
• Whether any significant change in results of operations is anticipated

These disclosures help provide context around the delay rather than simply notifying the SEC that the filing will be late.

Companies should make sure the information included in Form 12b-25 is accurate and specific to the circumstances causing the delay. The filing becomes part of the company’s public EDGAR record, so the explanation should clearly communicate the reason for the late filing and the company’s expectations regarding completion of the Form 10-K.

What Happens If the 10-K Is Filed Within the 15-Day Extension?

If the company files its Form 10-K within the 15-day extension provided under Rule 12b-25, the filing can still be treated as timely for SEC reporting purposes.

This is why completing the Form 10-K within the extension period is so important. The NT 10-K does not replace the annual report. It simply provides additional time to complete and submit it.

Once the Form 10-K is filed within the permitted period, the company avoids moving into the more serious stage of filing delinquency that begins after the extension expires.

The main objective after filing an NT 10-K should therefore be to complete the annual report within the 15-calendar-day window.

What Happens If the 15-Day NT 10-K Extension Is Missed?

If the company does not file its Form 10-K within the 15-day extension period, it moves beyond the protection provided by Rule 12b-25 and the annual report becomes delinquent.

At that point, the issue is no longer simply a delayed filing. Continued noncompliance can create broader consequences involving SEC reporting obligations, stock exchange requirements, and eligibility to use certain capital-markets registration forms.

The exact impact will depend on the company’s circumstances, including its exchange listing, reporting history, and financing structure. For a more detailed discussion, see Colonial Filings’ guide on what happens if a Form 10-K is filed late.

For this reason, companies that file an NT 10-K should treat the 15-day extension as a firm deadline and work toward completing the Form 10-K before that period expires.

NT 10-K vs. NT 10-Q Deadline

Both NT 10-K and NT 10-Q filings use the Form 12b-25 framework when a company cannot submit a periodic report by its original deadline.

The main difference is the amount of additional time available. A delayed Form 10-K may receive an additional 15 calendar days, while a delayed Form 10-Q may receive an additional 5 calendar days.

This means companies should not assume the same extension period applies to every periodic filing. The shorter NT 10-Q extension gives companies significantly less time to complete a delayed quarterly report.

For Form 10-K filings, the key deadline remains the 15-calendar-day extension provided through Rule 12b-25, provided the applicable filing requirements are met.

Frequently Asked Questions About the NT 10-K Filing Deadline

How long is an NT 10-K extension?

For a Form 10-K, the extension available under Rule 12b-25 is 15 calendar days. This gives an eligible company additional time to complete and submit its annual report after the original filing deadline.

When must an NT 10-K be filed?

An NT 10-K, filed on Form 12b-25, must generally be submitted no later than one business day after the original Form 10-K deadline.

Is an NT 10-K the same as Form 12b-25?

NT 10-K is the term commonly used for a Form 12b-25 notification filed when a company cannot submit its Form 10-K on time. In other words, Form 12b-25 is the SEC form used for the notification, while NT 10-K describes the filing in connection with a delayed Form 10-K.

Does every filer receive the same 15-day extension?

The normal Form 10-K deadline varies by filer status. Large accelerated filers generally have 60 days after fiscal year-end, accelerated filers have 75 days, and non-accelerated filers have 90 days.

However, the Rule 12b-25 extension for Form 10-K is 15 calendar days regardless of those different original filing periods.

What happens if the extended 10-K deadline falls on a weekend or holiday?

If a filing due date falls on a weekend or federal holiday when EDGAR is closed, the deadline generally moves to the next business day. Companies should check the applicable SEC holiday calendar when calculating the final filing date.

Can a company get another 15-day NT 10-K extension?

No. Companies should not expect to obtain another 15-day extension by filing a second NT 10-K for the same reporting period. The Rule 12b-25 extension is a one-time period.

If the Form 10-K is not filed before that extension expires, the filing becomes late and the company moves beyond the Rule 12b-25 extension period.

Preparing for an NT 10-K Filing

Preparing for an NT 10-K filing starts with identifying the delay as early as possible. The sooner a company knows that its Form 10-K may not be completed on time, the more time it has to confirm the applicable deadlines and prepare the required notification.

The company should verify its original Form 10-K due date, determine the Form 12b-25 deadline, and calculate the end of the 15-day extension period. It should also confirm whether any weekend or SEC holiday affects those dates.

At the same time, the information required for Form 12b-25 should be prepared carefully, including the reason for the delay and whether the company expects to complete the Form 10-K within the extended period.

Finally, the filing should be coordinated with enough time for EDGAR submission. Careful preparation helps reduce last-minute issues and keeps the company focused on completing the Form 10-K within the available extension period.

Get Help With Your NT 10-K Filing

Colonial Filings helps public companies prepare and submit Form 12b-25, Form 10-K, and other SEC filings through EDGAR. If your company is approaching an NT 10-K filing deadline, our team can assist with filing preparation, EDGAR formatting, review, and final submission to help keep the process on track.