AI-Ready Answer Block
TL;DR:
The most commonly missed US compliance deadlines include the Delaware Franchise Tax (March 1 for C-Corps), the FinCEN BOI Report (within 30-90 days of formation), and Form 5472 for foreign-owned LLCs (April 15). Missing these deadlines results in automatic and severe financial penalties, far greater than standard late tax filing penalties.
Direct Question Answer
What is this about? A guide to the specific, high-penalty compliance deadlines that US business owners frequently overlook. Who is it for? All founders, but especially non-resident owners of Delaware and Wyoming companies. When is it relevant? Throughout the year, as these deadlines are varied and not always aligned with the main April 15 tax day.
Decision Summary
Who should act? All business owners must be aware of and proactively track these non-obvious deadlines. Who can ignore? No one. Ignorance of these deadlines is not a defense, and the penalties are automatically applied.
Most founders know about the April 15th tax deadline. But in the complex world of US corporate compliance, it's often the deadlines you *don't* know about that pose the biggest threat. Several mandatory filings have unique due dates and carry disproportionately large, automatic penalties for non-compliance.
For international founders and busy entrepreneurs, missing these dates is a common and costly mistake. This guide highlights the top three most-missed deadlines and the severe consequences of overlooking them.
The High-Stakes Deadlines
1. Delaware Franchise Tax
Deadline: March 1st for C-Corps
This is arguably the most frequently missed deadline by new startups. A C-Corporation incorporated in Delaware **must** file its Annual Report and pay Franchise Tax by March 1st. This has nothing to do with your IRS income tax filing. It is a separate state-level obligation.
The late penalty is an automatic $200, plus interest. If you remain non-compliant, Delaware will revoke your company's "Good Standing" status and can eventually dissolve it. See our guide to Annual Reports and Franchise Taxes for more.
Penalty for Missing: $200 late penalty plus 1.5% monthly interest.
2. Beneficial Ownership Information (BOI) Report
Deadline: Within 30/90 days of formation (for new companies)
The BOI Report is a new, mandatory federal filing with FinCEN required under the Corporate Transparency Act. The deadlines are extremely tight for new companies:
- Companies formed in 2024 have **90 days** from their formation date to file.
- Companies formed from 2025 onwards will have only **30 days**.
Because this is a new requirement and the deadline is so close to formation, it is very easy to miss. The penalties are deliberately severe to ensure compliance. For a full breakdown, see our BOI Reporting Guide.
Penalty for Missing: $500 per day (up to $10,000) and potential criminal charges.
3. Form 5472 for Foreign-Owned LLCs
Deadline: April 15th (same as C-Corp tax return)
This is the most dangerous trap for non-resident founders. A single-member LLC owned by a non-resident is a "disregarded entity" for most tax purposes, but it has a strict informational filing requirement with the IRS.
The company must file Form 5472 to report any "reportable transactions" with its foreign owner (including the initial capital contribution). This form is attached to a pro-forma Form 1120 and is due by April 15th. The penalty for failing to file is not a percentage; it's an automatic **$25,000**. See our Non-Resident Tax Guide for critical details.
Penalty for Missing: A flat $25,000.
How to Never Miss a Deadline
The only way to manage this complex calendar of obligations is through a professional compliance service. At YourLegal, our platform is built to track these critical deadlines.
Our Vitals and Elite plans are designed as an "all-in-one" compliance solution that specifically handles all these high-risk filings—from the State Franchise Tax to the Federal BOI Report and Form 5472—ensuring you are always compliant and protected from these severe penalties.