US LLC Tax Deadline Calculator
Find your exact Form 5472, 1120, and 1065 filing deadlines with extension dates and a calendar file you can import.
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Select your LLC type and tax year to see every IRS deadline that applies to your foreign-owned US LLC original due date, extension request cutoff, and extended deadline. Dates assume a calendar tax year (January–December).
If you have not filed (or extended), file as soon as possible penalties grow with time. A reasonable-cause statement can accompany a late filing.
| Deadline | Date |
|---|---|
Form 5472 + Pro Forma 1120 due Form 5472 + 1120 | Wednesday, April 15, 2026 |
Extension request deadline (Form 7004) Form 7004 | Wednesday, April 15, 2026 |
Extended deadline (if Form 7004 filed) Form 5472 + 1120 | Thursday, October 15, 2026 |
Dates are for calendar-year filers and roll weekend dates to the next business day. Federal holidays (e.g. Emancipation Day) can shift deadlines by a day the IRS announces exact dates each year. Fiscal-year LLCs: your deadline is the 15th day of the 4th month (single-member) or 3rd month (multi-member) after your year end.
Deadline coming up? File today in about 15 minutes.
Form5472.io generates your IRS-ready Form 5472 + Pro Forma 1120 for $147 one-time and can fax it straight to the IRS.
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