If you missed the October 15 extended tax deadline, file now — penalties grow every month you wait, and filing late is always cheaper than not filing at all. The extension covered your paperwork, not your payment: any tax owed started accruing interest back on April 15. Your move now is a catch-up filing that stops the failure-to-file penalty from compounding further.
What the October 15 deadline actually was
October 15 was the extended filing deadline for calendar-year taxpayers who filed Form 4868 (individuals) or the equivalent extension earlier this year. For foreign-owned single-member LLCs, the related deadline package — Form 5472 with a pro-forma Form 1120 — was also due. Key point most owners miss: an extension extends the time to file, not the time to pay. Interest on any unpaid balance has been running since the original April deadline.
The penalties stacking against you right now
- Failure to file: 5% of unpaid tax per month (or part of a month), capped at 25%. This is the big one — and it starts the day after the deadline.
- Failure to pay: 0.5% of unpaid tax per month, capped at 25%.
- Interest: compounds daily on tax + penalties at the federal rate.
- Form 5472: a separate $25,000 penalty for foreign-owned LLCs that fail to file the 5472/1120 package — the IRS does not waive this one casually.
The good news: file today and the failure-to-file penalty stops growing. The longer you wait, the more expensive the lesson.
Your catch-up action plan
- Gather your books now — income, expenses, bank statements for the full year. Messy books are the #1 reason filings stall.
- File the return even if you can’t pay in full. Filing stops the 5%-per-month penalty; the IRS offers payment plans for the balance.
- Foreign-owned single-member LLC: make sure the Form 5472 + pro-forma 1120 package is included. This is the filing most non-resident owners miss, and the $25,000 penalty dwarfs any income-tax bill.
- Check state obligations separately — many states have their own extended deadlines and their own late penalties.
- Mark next year’s calendar today — set reminders 30 days before every deadline, not the week of.
What if you owe nothing?
File anyway. Zero-tax returns still carry information-reporting obligations (Form 5472 for foreign-owned LLCs), and an unfiled year creates a gap that complicates banking, visa paperwork, and future filings. A filed $0 return is clean; a missing year is a question mark.
Frequently asked questions
Is there any way to get another extension after October 15?
No. October 15 was the final extended deadline. The only move is to file as soon as possible.
Will the IRS really penalize me for being a few days late?
Yes — penalties accrue by month or part of a month, so even one day late counts as a month for the failure-to-file penalty.
I had no US income. Do I still need to file?
If you’re a foreign owner of a US LLC, the Form 5472 information filing is required regardless of income — with a $25,000 penalty for missing it.
Can Epics Deals file my late return?
Yes — tax filing from $120, including catch-up and foreign-owned LLC packages. The sooner you start, the less the penalties cost you.
Related:
- US LLC Taxes for Non-Residents: What You Must Know (2026) — https://epicsdeals.com/us-llc-taxes-non-residents
- Form 5472: The $25,000 IRS Penalty Non-Resident LLC Owners Must Avoid (2026) — https://epicsdeals.com/form-5472-penalty-guide-2026
Missed the deadline? Epics Deals files catch-up returns from $120 — for non-resident and US-resident founders. Formation is $130 + state fee.
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