Delaware LLC Tax Filing: Forms, Deadlines, and Examples

How does a Delaware LLC file federal taxes?

A Delaware LLC does not have a single, fixed way to file. By default the IRS does not treat the LLC as its own taxpayer at all — it looks “through” the LLC to its owners. That means the right federal form depends on two questions: how many owners does the LLC have, and are those owners US persons or non-residents? Get those two answers and the filing path becomes clear.

There are four common paths. A single-member LLC owned by a US person is disregarded and reports on Schedule C. A single-member LLC owned by a non-resident is also disregarded for income tax but must file a pro-forma Form 1120 with Form 5472. A multi-member LLC is a partnership that files Form 1065 and issues K-1s. Any LLC can instead elect corporate taxation and file Form 1120 as a C-corporation. Below we walk through each path, its deadlines, its penalties, and a worked example. None of this replaces advice from a qualified CPA for your specific facts.

Does a Delaware LLC pay federal income tax?

In the default case, the LLC itself pays no federal income tax. A standard Delaware LLC is a pass-through entity: profit and loss flow to the owners, who report their share on their own returns and pay tax at their individual rates. This is the core reason founders choose an LLC over a C-corporation, which faces entity-level tax. You can read the broader picture on our Delaware LLC taxes guide.

There are two important wrinkles. First, “no entity tax” does not mean “no filing.” A multi-member LLC and a foreign-owned single-member LLC both file information returns even when no tax is due at the LLC level. Second, pass-through status disappears if the LLC elects to be taxed as a C-corporation. After a Form 8832 election, the LLC files Form 1120 and pays the 21% federal corporate rate on its profit, with a second layer of tax on distributions. Most small operators keep the default pass-through treatment; the corporate election is usually a fundraising or benefits-driven decision.

How does a US-owned single-member LLC file (Schedule C)?

If you are a US person and you own 100% of your Delaware LLC, the IRS disregards the LLC as separate from you. You do not file a separate business return. Instead you report the LLC’s income and expenses on Schedule C, which attaches to your personal Form 1040. The net profit then flows to your 1040 and is taxed at your individual rate, and you generally also owe self-employment tax on that profit through Schedule SE.

The deadline is the same as your personal return: April 15 (shifting to the next business day if that falls on a weekend or holiday). You can request an automatic extension to October 15, but an extension to file is not an extension to pay — estimate and pay by April 15 to avoid interest. Most single-member US owners also make quarterly estimated payments during the year. Because the LLC is disregarded, you can often use your SSN on Schedule C, though many owners still get an EIN for banking and privacy. Remember this federal filing is entirely separate from the flat $300 Delaware franchise tax.

How does a foreign-owned single-member LLC file (1120 + 5472)?

This is the path that catches non-resident founders off guard. A Delaware single-member LLC owned by a non-resident is still disregarded for income tax, but since 2017 the IRS requires it to file a pro-forma Form 1120 with a Form 5472 attached. “Pro-forma” means you complete only the top identifying section of the 1120 — you are not calculating corporate tax — and the real disclosure happens on Form 5472, which reports reportable transactions between the LLC and its foreign owner or related parties (capital contributions, loans, payments, distributions).

The stakes are high: failing to file Form 5472, or filing it incomplete or late, triggers a $25,000 penalty per form. The deadline is generally April 15, or June 15 if the owner lives abroad and the LLC has no US office, and the return is filed by mail or fax rather than the usual e-file path. You need an EIN to file, which for non-SSN applicants typically takes 2 to 4 weeks to obtain. Our dedicated Form 5472 for Delaware LLC guide walks through the form line by line, and our non-resident guide covers the full compliance calendar. This is information, not tax advice — a foreign-owned LLC should have a CPA confirm its reportable transactions.

How does a multi-member Delaware LLC file (Form 1065 + K-1s)?

When a Delaware LLC has two or more members, the IRS treats it as a partnership by default. The LLC files Form 1065, the US Return of Partnership Income. Form 1065 is an information return: the partnership reports its total income and deductions but pays no federal income tax itself. Instead it allocates each member’s share of profit, loss, and credits on a Schedule K-1, which each member receives and uses to report their share on their own return.

The Form 1065 deadline is March 15 — a full month earlier than the individual deadline — because members need their K-1s in time to file their own 1040s by April 15. An automatic six-month extension pushes the partnership return to September 15. Multi-member LLCs always need an EIN; an SSN cannot be used. If some members are non-residents, the partnership may also have withholding obligations on effectively connected income, which is a more complex area to review with a tax professional. The partnership’s allocations should match the ownership and distribution rules in your operating agreement, so keep that document current.

What if the LLC elects to be taxed as a corporation?

Any Delaware LLC can break out of the default rules by filing Form 8832, the entity classification election, to be taxed as a C-corporation. After that election the LLC files Form 1120 and pays the flat 21% federal corporate income tax on its profit, with a second layer of tax when it distributes earnings to owners. Founders usually make this election to raise venture capital, issue qualified small business stock, or offer equity-based benefits — not to save tax, since pass-through treatment is generally cheaper for small operators.

A separate election, Form 2553, lets an eligible entity be taxed as an S-corporation. But S-corp status comes with a hard restriction: every owner must be a US citizen or US resident. A Delaware LLC owned by a non-resident is not eligible for an S-corp election, so this path is only open to US-owner LLCs. If you are deciding between staying an LLC and converting, compare the franchise-tax side on our LLC vs corp franchise tax page and the structure side on the Delaware C-corp guide.

What are the federal filing deadlines for a Delaware LLC?

Deadlines vary by how the LLC is taxed, so this is the table to bookmark. All dates roll to the next business day if they fall on a weekend or federal holiday, and each return has its own extension path.

Note that the franchise-tax row is included only to show how separate it is: it is a flat state fee with its own June 1 date, not part of any federal income filing. For the deadline detail and what happens when you slip, see our franchise tax deadlines and late fee pages.

What does the state-level filing look like for a Delaware LLC?

Here is the point that confuses most founders: a Delaware LLC has almost no state income filing in Delaware itself if it does not operate there. Delaware does not impose income tax on LLC profits earned entirely outside the state by non-resident members, and an LLC with no Delaware-source income generally files no Delaware income tax return. What every Delaware LLC owes is the flat $300 franchise tax by June 1, and unlike corporations, an LLC files no Delaware annual report — see our annual report page for that distinction.

The catch is the difference between your state of formation and the state where you actually operate. If you live in or run the business from another US state, that state may treat the Delaware LLC as doing business there, requiring you to foreign qualify and file a state return where you have nexus. A fully non-resident, internet-based Delaware LLC with no US physical presence usually has no US state income filing beyond the federal forms above — but nexus rules are fact-specific, so confirm your situation with a tax professional rather than assuming.

Worked example: a non-resident single-member Delaware LLC

Suppose Amara, who lives in Lagos, forms a single-member Delaware LLC in 2026 to sell a SaaS product to US customers and collect payments through Stripe. She is the only owner and she is a non-resident. Her LLC is disregarded for income tax, so it does not file Form 1065 or pay entity-level income tax. But because it is foreign-owned and single-member, it must file a pro-forma Form 1120 with Form 5472 attached by April 15, 2027 (June 15 if she qualifies for the abroad extension).

On Form 5472 she reports reportable transactions with herself as the foreign owner: the capital she contributed to fund the LLC, any loans, and distributions she took out. She needed an EIN first, which took about three weeks since she has no SSN. Separately, she pays the flat $300 Delaware franchise tax by June 1, 2027 — a different form, agency, and date. If she skips the Form 5472, the penalty is $25,000, so she treats it as a non-negotiable deadline. Whether her US-source income is actually taxable depends on whether it is “effectively connected” to a US trade or business — a judgment call she confirms with a CPA, because this example is illustrative, not tax advice.

How does Delaware LLC tax filing compare for each owner type?

The single biggest driver of complexity is who owns the LLC and how many owners there are. This table puts the three default paths side by side so you can see at a glance which one applies to you.

Whichever row matches you, the franchise tax and EIN steps are the same: the flat $300 to Delaware each June 1, and an EIN obtained at formation. Our how it works page shows where these pieces fit into the overall timeline, and pricing shows the all-inclusive $397 cost.

What penalties apply if a Delaware LLC files late?

Late federal filing is expensive, and the penalty depends entirely on which return you missed. A late Form 1065 partnership return carries a penalty of roughly $245 per partner, per month, for up to 12 months — so a three-member LLC that files five months late can owe several thousand dollars even with zero tax due. A missed or incomplete Form 5472 is the harshest: a flat $25,000 penalty per form, with more if it stays unfiled after IRS notice. Schedule C income reported late on a Form 1040 is subject to failure-to-file and failure-to-pay penalties plus interest on any unpaid tax.

Because the IRS adjusts these figures periodically, treat the numbers above as current-as-known and verify the exact amount before relying on it. The practical takeaway is that the information returns — 1065 and especially 5472 — carry real penalties even when no tax is owed, so they are not optional just because the LLC made no money. Keep the federal deadlines and the separate June 1 franchise-tax date on one compliance calendar so nothing slips. If you ever wind the company down, file the final returns and formally dissolve the LLC rather than abandoning it, or the obligations keep accruing.

How does the BOI / FinCEN report fit into tax filing?

It does not — BOI reporting is not a tax filing at all, and it is worth separating clearly. Beneficial Ownership Information (BOI) reporting is a federal filing with FinCEN, not the IRS, and it has nothing to do with Schedule C, Form 1065, or Form 5472. Under a March 2025 FinCEN interim final rule, BOI reporting was removed for US domestic reporting companies, and US persons are generally exempt; only certain “foreign reporting companies” were left with an obligation. Because this area is still evolving, confirm the current requirement directly with FinCEN or a qualified advisor before assuming you do or do not need to file.

The reason to flag it here is that founders often lump “all the federal paperwork” together. Keep three buckets separate: your income tax filing (IRS, by entity type), any FinCEN / BOI obligation (separate rules, hedged to the March 2025 interim rule), and your Delaware franchise tax (state, June 1). Our BOI report for Delaware page covers the FinCEN side in depth. None of this is legal or tax advice; confirm your obligations with a qualified professional.

How does DelawareLLC.co help with Delaware LLC tax filing?

We are a formation service, not a tax preparer, so we are honest about the line: we set you up correctly and connect you to filing help, but your actual return should be prepared or reviewed by a qualified CPA. What we do handle is the foundation. Our service is $397 all-inclusive — including the Delaware $110 state fee — and covers your Certificate of Formation, an EIN (2 to 4 weeks for non-SSN applicants), registered agent for year one, an operating agreement, and US bank account application help. Filing and EIN work carry a money-back guarantee.

Just as importantly, your specialist tracks the dates that matter so nothing surprises you: the federal deadline for your entity type, the Form 5472 obligation if you are a foreign-owned single-member LLC, and the separate $300 franchise tax due June 1. We remind you about these whether or not you renew other services, and we can point you to a tax professional for the return itself. If you are still setting up, start with Delaware LLC formation or read the full Delaware LLC overview. This page is general information, not legal or tax advice for your specific situation.