A quick clarification for Australian readers: an LLC is a U.S. business structure. An Australian Pty Ltd has different tax obligations. This article is for Australian owners, or Australian businesses, that hold a U.S. LLC.
We cover how to identify the missed return, why filing and payment penalties are separate, what federal and state consequences look like, and how to get compliant. Penalty figures are in USD. Federal figures reflect IRS guidance current as at October 2026.
Key Takeaways
- The LLC label doesn't set the filing duty; U.S. tax classification does.
- Late filing and late payment are separate penalties; an extension to file doesn't extend payment.
- Submit missing returns promptly rather than waiting until you can pay in full.
- Review U.S. federal, U.S. state and Australian obligations separately.
Which LLC Tax Return Was Required?
Start with the LLC's U.S. tax classification
The IRS LLC guidance treats classification as the starting point. The default rules look like this:
| LLC type | Usual federal reporting |
|---|---|
| Single-member, default | Disregarded; reported on the owner's return (Form 1040 with Schedule C, E or F for individuals) |
| Two or more members, default | Form 1065 partnership return |
| Elected C corporation | Form 8832, then Form 1120 |
| Elected S corporation | Form 2553, then Form 1120-S |
Two Australian-specific cautions apply:
- A foreign individual owner isn't automatically a Form 1040 filer; a nonresident alien with a U.S. trade or business may need Form 1040-NR
- S corporation status isn't available when nonresident-alien individuals, corporations or partnerships are shareholders, so Australian residence alone doesn't make an LLC S-eligible
Check for a foreign-owner information return
A wholly foreign-owned, single-member LLC that is disregarded for income tax can still have to file. If it has reportable related-party transactions, it files Form 5472 attached to a pro forma Form 1120. Each related party gets its own Form 5472.
Zero revenue does not remove the requirement. Owner contributions, distributions, and transactions around formation or dissolution can be reportable. Only the absence of reportable transactions switches it off.
Income-tax disregard also doesn't remove employment-tax or excise-tax duties. Separately from the income-tax return, FinCEN's August 2026 final rule exempts U.S.-formed entities from beneficial ownership (BOI) reporting, though some foreign-formed entities registered in the U.S. remain in scope.
Review state and Australian obligations separately
States run their own regimes, whatever the federal position:
- California: $800 annual tax for LLCs organised or doing business there, even without activity
- Delaware: $400 annual LLC tax from 1 January 2026, due 1 June
- Texas: franchise tax reports are required, though entities under the $2.65M revenue threshold owe no tax
- New York: publication requirements and a $9 biennial statement
On the Australian side, residents generally report worldwide income. Controlled foreign company rules can attribute income to residents with relevant interests.
Under Division 830, a qualifying U.S. LLC may be treated as a foreign hybrid company, taxed as a partnership in Australia. The ATO's TR 2009/6 walks through qualifying and non-qualifying examples. Not every Australian LLC owner has the same obligation.
How Is the Penalty for Not Filing an LLC Tax Return Calculated?
Federal failure-to-file penalty
Per the IRS failure-to-file guidance, the penalty on an income tax return is 5% of unpaid tax per month or part-month, capped at 25%. If the return is more than 60 days late, the minimum is the lesser of $525 or 100% of the unpaid tax for returns required in 2026 ($535 for 2027).
Any part of a month counts as a full month. And because the base is unpaid tax, a return showing no tax owing produces little or no percentage penalty. That's where the information-return penalties below matter.
Failure-to-pay penalty
This one is separate. It's generally 0.5% of unpaid tax per month or part-month, capped at 25%, running from the payment due date.
When both apply in the same month, the filing penalty drops to 4.5%, so the combined rate is 5%. Interest also accrues: the general underpayment rate is 7% per year, compounded daily for 1 October to 31 December 2026, and 9% for large corporate underpayments.
An extension doesn't change this. Form 4868 (individuals) and Form 7004 (most business returns) extend the time to file, not the time to pay.
Partnership and S corporation penalties
Pass-through LLCs can be penalised even though the entity pays no federal income tax. The penalty is $255 per partner or shareholder, per month or part-month, for up to 12 months on returns required in 2026 ($260 for 2027). Late and substantially incomplete returns both count.
A five-member LLC that files Form 1065 six months late faces roughly 5 × 6 × $255 = $7,650 before any relief.
Foreign-owned information returns
Form 5472 carries its own penalty: $25,000 for failing to file correctly or keep required records. A substantially incomplete form counts as not filed. If the failure continues more than 90 days after IRS notification, an additional $25,000 per related party per 30-day period applies.
That is why a dormant, wholly foreign-owned LLC can face a larger bill than a profitable one. Inaccurate or unsupported information can create exposure beyond a simple late-filing charge.
State-level penalties
States set their own rules, so treat these as state-specific examples:
- Delaware: $200 penalty plus 1.5% monthly interest on tax and penalty
- Texas: $50 late-report penalty, even when no tax is due; late payment adds 5%, then another 5% after 30 days
A holding LLC can also trigger unexpected state filings. California, for example, can attribute activity and income to an LLC through its interests in pass-through entities.
A narrow passive-investment exception exists, but there's no blanket exemption for holding LLCs. Check the state's current rules before assuming you're outside it.
What Happens If an LLC Never Files?
Notices and substitute returns
The IRS can prepare a substitute return under IRC 6020(b). It warns that such a return may omit deductions you're entitled to, so the liability can be overstated. Filing your own return can establish the correct figure.
Notices commonly escalate from a CP14 bill, to a CP504 warning of intended levy, to an LT11 or Letter 1058 with Collection Due Process appeal rights. That's an example, not a guaranteed sequence for every LLC.
Collection and operational consequences
- Lien: a federal tax lien can follow assessment, demand and non-payment, alerting other creditors
- Levy: actually seizes property such as bank funds or business assets
- No time limit: tax can be assessed at any time when no return is filed, and a substitute return doesn't start the usual clock
- California: suspension removes good standing; revival generally needs outstanding returns filed and balances paid
- New York: failing to complete publication within 120 days suspends authority to do business
Unresolved returns can also complicate banking, financing, distributions and dissolution. Not every late filer faces enforcement immediately.
Ordinary lateness versus willful conduct
A late return isn't tax fraud. The civil fraud penalty is 75% of the underpayment attributable to fraud. A fraudulent failure to file replaces the ordinary rate with 15% per month, capped at 75%.
Willful failure to file is a misdemeanour carrying fines up to $25,000 for a person or $100,000 for a corporation, and/or up to a year's imprisonment. These outcomes are for deliberate concealment, not an overlooked LLC return.
What Should You Do If Your LLC Tax Return Is Already Late?
Confirm every missing filing first
Build a year-by-year list covering:
- Federal income tax and partnership or corporate returns
- Form 5472 and pro forma Form 1120
- State returns, annual reports and franchise tax
- Payroll filings
- Australian obligations tied to the LLC
Confirm classification, ownership, accounting period, registered states, business activity and whether notices have already arrived. This decides which forms you file, and in what order.
Reconstruct records, then file
Gather bank statements, invoices, receipts, payroll data, ownership details, prior returns, notices and foreign-transaction documents. Bring the bookkeeping up to date before filing, so the return reflects actual income, expenses and allocations rather than an authority's estimate.
Then file. The IRS says to file past-due returns even if you can't pay in full. Filing stops the failure-to-file penalty from growing, sets the correct tax base and lets you respond to notices.
IRS enforcement policy usually looks back six years. Ask a professional whether to file oldest-first or together, and follow any notice instructions.
Payment and relief options
- Instalments: individual owners may qualify for online agreements at $50,000 or less; business accounts usually need phone assistance
- Offer in compromise: may settle for less based on ability to pay, but required returns must be filed first
- Currently Not Collectible: pauses collection for hardship, while interest and penalties continue
- First-Time Abatement: uses a three-year compliance-history test
- Reasonable cause: assessed case by case, supported by dates, records and evidence of efforts to comply
For Form 5472, ordinary first-time abatement is usually not available. Reasonable-cause requests need the delinquent returns and a written statement under penalties of perjury.
Small partnership relief under Rev. Proc. 84-35 excludes nonresident-alien and corporate partners, so it won't help most Australian-owned LLCs. Relief is never automatic.
The ATO has its own payment plans and failure-to-lodge remission, and the general interest charge keeps compounding daily.
Consider cross-border support
VJM Global works with Australian businesses on bookkeeping, U.S. tax compliance and accounting for U.S. LLC obligations, with scope confirmed before engagement. Multiple missing years, foreign ownership, state exposure, partnership structures or tax notices all justify professional advice over a generic online calculator.
How Can You Avoid LLC Filing Penalties in the Future?
Build a classification-based calendar
Track U.S. federal, U.S. state and Australian dates separately. For calendar-year returns filed in 2026, per IRS Publication 509:
| Return | Original | Extended (Form 7004) |
|---|---|---|
| Form 1065 / 1120-S | 16 March | 15 September |
| Form 1120 | 15 April | 15 October |
| Form 5472 with pro forma 1120 | 15 April | 15 October |
Foreign-owner and fiscal-year variations can change these dates. Australian self-lodgers generally lodge by 31 October.
Keep records and set funds aside
- Reconcile bank and payment accounts monthly
- Store supporting documents securely
- Review related-party transactions regularly
- Set aside funds for estimated tax (cash reserves do not replace filing)
An LLC can still owe a return when expected tax is zero.
Review the structure annually
Revisit the setup whenever any of these change:
- Ownership or tax elections
- U.S. activities or state registrations
- Australian residency
- Related-party transactions
Get professional review before the deadline if the LLC is foreign-owned, operates across states, invests in other entities, or has received an IRS, state or ATO notice.
Frequently Asked Questions
What is the penalty for not filing an income tax return?
It depends on the return type, unpaid tax, length of delay and jurisdiction. Federally, the base rate is 5% of unpaid tax per month, capped at 25%. Check current IRS guidance.
What is the penalty for filing a corporate tax return late?
It varies by entity type and return. Verify current federal and state amounts instead of using a general LLC figure.
What happens if you file your income tax return late?
Expect a late-filing penalty, interest and possibly notices. File promptly even if you can't pay in full, since that limits the filing penalty.
Does an LLC have to file a tax return if it had no income?
Not always. No income or profit does not automatically remove federal, state, partnership, corporate or foreign-owner filing duties.
Can an LLC's late filing penalty be waived?
Possibly, through first-time abatement, reasonable cause or other relief. Eligibility and documentation matter, and approval isn't guaranteed.
