You are forming a U.S. company in the last few months of 2026. Someone told you to file now, put January 1 as the start date, and skip a short-year tax return.
Here is the direct answer.
Forming your LLC before year-end is usually the right call. The start date on your EIN application will not keep you out of a 2026 tax filing.
A corporation’s first tax year starts the day it legally exists. For an LLC, the entity’s tax picture turns on when its tax election takes effect. Whether that means a 2026 return depends on two things: who owns the company and how it’s taxed.
When to form your new U.S. LLC?
January is the worst month to start from zero. State filing offices, the IRS, and bank compliance teams all get buried at the start of the year. Founders who form in the fall have an EIN, a bank account, and marketplace applications moving before that backlog hits.
For a foreign owner, the gap is bigger. Without a Social Security number or ITIN, the EIN can’t be done online. It goes by fax, mail, or phone for international applicants, and by mail it can take several weeks. That alone is a reason not to wait.
The catch is what forming early does to your first tax year. The “January 1 start date” advice holds for some owners and entity types. For others, it creates the exact filing it promised to avoid.
What actually starts your first tax year
Three rules decide it.
- Existence starts the tax year. A corporation’s first tax year begins on the effective date of its Articles, the day it legally exists. For an LLC that elects to be taxed as a corporation, the corporate tax year begins on the effective date of that election.
- A tax year generally can’t run longer than 12 months. The first year ends on the first year-end date after formation.
- The SS-4 start date is informational. Line 11, “date business started,” doesn’t move your tax year. Line 12, the closing month of your accounting year, does matter. It tells the IRS which year-end to expect.
Take a corporation formed November 10, 2026 with a December 31 year-end. Its first tax year ends December 31, 2026, and a short-year return is due April 15, 2027. It can’t stretch to December 2027, whatever date went on the EIN application.
January does not un-earn November. If the company exists in 2026, the IRS expects to hear about 2026, one way or another.
The IRS lays out these rules on its tax years page.
Will you owe a short-year tax return for 2026?
It depends on your setup. Here are the four we see most.
U.S.-owned LLC with a tax election effective January 1, 2027
This works as intended. A single-member LLC owned by a U.S. individual is disregarded until its S-corp or C-corp election takes effect. There’s no separate entity return for the weeks in 2026. Any December activity lands on your personal return, and the company’s first entity return covers 2027.
Corporations and LLCs taxed as a C-corp from day one
A December 31 year-end means a 2026 return. A corporation generally files a return for every year it exists, even with zero income. The IRS can relieve a corporation that never completed its organization, never did business, and never had income, but that relief is narrow and not something to plan around. There are two clean ways to get a full first year.
- Choose a fiscal year-end. Set the year to end in the month before you form. Form in November 2026 with an October 31 year-end, and your first year runs to October 31, 2027. The return is due February 15, 2028.
- Use a delayed effective date. File the Articles with an effective date of January 1, 2027. The company doesn’t exist until then, which means no EIN, no bank account, and no sales before January. States limit how far ahead that date can be set, so the filing usually happens in the last weeks of the year.
Foreign-owned single-member LLCs and Form 5472
The “January start” plan backfires here. A foreign-owned single-member LLC is treated as a corporation for Form 5472 purposes. If it is disregarded for any part of 2026 and has a reportable transaction with its owner in that period, it owes a pro forma Form 1120 with Form 5472 for 2026. Amounts paid in connection with forming the entity, including the owner’s contributions to cover formation fees, are reportable transactions, which is why a 2026 formation almost always triggers the filing. The penalty for a missed or incomplete Form 5472 starts at $25,000.
If the LLC elects C-corp status effective on its formation date, it follows the corporation rules above instead. A C-corp that is at least 25% foreign-owned files Form 5472 only in years with reportable transactions with a foreign related party, such as loans, royalties, services, or sales. The IRS Form 5472 page has the filing rules.
This is the setup behind most of our foreign-owned brand formations, and it’s where the timing decision carries the most money.
Multi-member LLCs taxed as partnerships
Usually fine, if 2026 is truly empty. A partnership with no income, deductions, or credits in 2026 isn’t required to file for 2026. A single sale or a deductible expense changes that. Foreign partners add withholding and reporting rules of their own, so confirm it with the CPA who will sign the return.
Non-resident forming before January 1? Three setups avoid a 2026 return
If you live outside the U.S., these are the only setups that let you file with the state in 2026 without a 2026 federal return.
- A delayed effective date of January 1, 2027. Works for an LLC or a corporation. The paperwork is filed in December, but the company doesn’t legally exist until January 1. The tradeoff: no EIN, no bank account, and no sales until January.
- A C-corp with a fiscal year-end. Form a corporation, or an LLC with its C-corp election effective the day it’s formed, and set the year to end in the month before formation. The company exists in 2026, but its first return covers a full 12 months and isn’t due until 2028.
- A multi-member LLC with nothing happening in 2026. A partnership with no income, deductions, or credits for the year doesn’t file, and partnerships don’t file Form 5472. This only holds if 2026 is truly empty.
What doesn’t work: a single-member LLC that stays disregarded. Paying the state fee to form it is a reportable transaction, and that alone puts a pro forma Form 1120 and Form 5472 on the calendar for 2026. It’s also the structure most foreign sellers pick first because it’s the cheapest, which is why the timing decision matters more for them than anyone.
How the start-up costs deduction works
What you spend in 2026 to get ready still counts. The timing is set by when you open.
Start-up costs are deducted in the year your business actually begins operating. That’s not the year you formed, and it’s not the year you spent the money. If you open in January 2027, the deduction goes on your 2027 return.
One catch for corporations: costs you pay personally before the company exists aren’t automatically the company’s deduction. Keep the receipts and have the company reimburse you or document them properly once it’s formed.
- Up to $5,000 of start-up costs is deductible in your first year of operation.
- The rest is amortized over 15 years (180 months), starting the month the business begins.
- The $5,000 shrinks dollar for dollar once total start-up costs pass $50,000. At $55,000, there’s no immediate deduction at all.
- Organizational costs, such as state filing fees and legal fees to form a corporation or partnership, are a separate bucket with the same $5,000, $50,000, and 15-year rules.
What counts as a start-up cost
- Market analysis: surveys and research on potential markets.
- Advertising: marketing for your launch.
- Travel: trips to meet suppliers or research markets.
- Training and wages: pay for employees trained before you open.
- Professional fees: consultants, accountants, and attorneys who help you get ready to operate. Fees to form the entity itself are organizational costs, covered above.
What doesn’t count, and follows its own rules
- Equipment, vehicles, and property: depreciated once placed in service, and some may qualify for an immediate write-off under Section 179 or bonus depreciation.
- Inventory: deducted as it sells, through cost of goods sold.
- Interest and taxes: handled under their own deduction rules.
- Research and experimental costs: governed by a separate section of the tax code.
Two examples
A small launch. You spend $4,000 in fall 2026 on market research, launch ads, and a consultant. The business opens in January 2027. The full $4,000 is deductible on your 2027 return.
A bigger build-out. You spend $60,000 in 2026. $20,000 goes to equipment and store fixtures, and $40,000 goes to training, consultants, and launch ads. The $20,000 follows the depreciation rules separately. The $40,000 is under the $50,000 threshold, so $5,000 is deducted in your first year and the remaining $35,000 is amortized over 15 years, about $2,333 for each full year.
Push that $40,000 to $56,000 and the immediate deduction disappears. The full amount is still recovered over 15 years, but that’s $5,000 less deducted up front from one budgeting decision.
The hobby loss rule
The hobby loss rules apply to individuals, partnerships, and S-corps, not C-corps. Showing a profit in three of five consecutive years gives you a presumption that you’re running a business. It’s a safe harbor, not a requirement. Forming an LLC doesn’t settle the question by itself. How you run the activity does: separate books, a real plan, and decisions made to earn a profit.
Two assumptions that no longer hold
“An LLC takes me off Schedule C.” An LLC gives you liability protection. For income tax, a single-member LLC owned by a U.S. individual is disregarded by default, and an operating business still reports on Schedule C. Moving off Schedule C takes an S-corp or C-corp election, and that’s a payroll and tax decision worth running the numbers on first.
“I need to file a beneficial ownership report.” Companies formed in the U.S. no longer file beneficial ownership reports under the Corporate Transparency Act. FinCEN’s final rule confirming that took effect August 14, 2026. Details are on the FinCEN BOI page.
The bottom line
Forming before January still makes sense for most founders. The formation date, the tax election, and the fiscal year-end are three separate decisions, and the EIN start date controls none of them.
A U.S. owner with an LLC and a January 1 election is in good shape federally. State rules are separate: California, for example, can require an LLC return and its minimum tax for a partial first year. A corporation or a foreign-owned LLC needs a plan before the Articles go in, or 2026 comes with a return nobody budgeted.
What we do
We review every formation against your goals before anything gets filed. That includes the formation date, the tax election, and the year-end, because fixing a wrong year-end later costs more than getting it right now.
We work with tax attorneys and CPAs, and the CPA who signs your return confirms the final plan.
Ways to move forward
1. Foreign-owned and heading to TikTok Shop? Score your setup against the verification requirements before you form.
Take the TikTok Shop Verification Scorecard
2. Get the timing decision right. The Strategy Call with Scott ($500) is 30 minutes built around your top one to three questions. Send them to support@launchwithconfidence.com about a day ahead. You leave knowing which setup fits and which service applies.
Book the $500 Strategy Call with Scott
3. Ready to form? See how we set up foreign-owned brands for U.S. marketplaces, entity through verification.
Foreign-owned brand formation
Frequently asked questions
Does the start date on my EIN application control my first tax year?
No. The “date business started” on Form SS-4 is informational. A corporation’s first tax year begins on the day it legally exists, and an LLC’s corporate tax year begins on the effective date of its election. The closing month you enter on the SS-4 does matter, because it tells the IRS which year-end to expect.
Can I form in November and have my first tax year start January 1?
For a U.S.-owned single-member LLC, yes: it’s disregarded until a tax election takes effect January 1, so its first entity-level return covers 2027. A corporation formed in November starts its tax year in November. The alternative is filing the Articles with a delayed effective date of January 1, 2027, so the company doesn’t exist until then.
Does a foreign-owned LLC formed in December owe a 2026 filing?
Generally yes. A foreign-owned single-member LLC that is disregarded for any part of 2026 and has a reportable transaction with its owner files a pro forma Form 1120 with Form 5472 for 2026. Amounts paid to form the company count as reportable transactions.
Can a non-resident form a U.S. company in 2026 without a 2026 tax return?
Yes, three ways: file with a delayed effective date of January 1, 2027; form a C-corp with a fiscal year-end; or form a multi-member LLC that has no income, deductions, or credits in 2026. A foreign-owned single-member LLC that is disregarded in 2026 almost always owes a pro forma Form 1120 with Form 5472.
Can a C-corp use a fiscal year-end instead of December 31?
Yes, in most cases. A new C-corp adopts its year-end by filing its first return using that year. Personal service corporations generally must use a calendar year, and S-corps generally must as well.
When do I deduct start-up costs paid in 2026?
In the year your business begins operating. If you open in January 2027, up to $5,000 goes on your 2027 return, and the rest is amortized over 15 years. The $5,000 shrinks once total start-up costs pass $50,000, and it’s gone at $55,000.
Do U.S. companies still file beneficial ownership reports with FinCEN?
No. FinCEN’s final rule, effective August 14, 2026, permanently removed that requirement for companies formed in the United States. Entities formed under foreign law and registered to do business in a U.S. state still report.
This article is provided for educational purposes only and does not constitute legal or tax advice. Scott Letourneau holds the MainStreet Certified Tax Advisor® (MSCTA®) credential, 2023-2025. This article covers federal rules. State rules differ, and tax rules and filing deadlines can change. Confirm your specific setup with the qualified professional who prepares your return.
Last reviewed: September 2026.
