An S-corporation with no income but expenses still has to file a federal return, can still deduct its ordinary business costs, and will generate a loss that flows out to its shareholders on a Schedule K-1. Whether that loss actually lowers anyone’s tax bill is a separate question, because the allocated loss has to survive up to four limitation rules on your personal return before it reduces a dollar of taxable income.
You Still Have To File Form 1120-S
Every S-corporation must file IRS Form 1120-S for each year its election is in effect, regardless of whether it earned any income.1Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation Skipping the return because there was no revenue is one of the most common and costly mistakes new S-corp owners make. For calendar-year filers, the return is due on the 15th day of the third month after the tax year ends. In 2026, March 15 falls on a Sunday, so the deadline shifts to Monday, March 16.2Internal Revenue Service. Starting or Ending a Business 3 Filing Form 7004 before that date secures an automatic six-month extension to September 15.
The late-filing penalty is steep and applies even when the return shows zero activity. For returns due in 2026, the IRS charges $255 per shareholder for each month or partial month the return is late, up to twelve months.3Internal Revenue Service. Instructions for Form 1120-S (2025) A two-shareholder S-corp that files four months late owes $2,040 in penalties on a return reporting nothing. The IRS can waive the penalty for reasonable cause, but “I didn’t think I needed to file” rarely qualifies.
Along with the 1120-S, the corporation prepares a Schedule K-1 for every shareholder reporting their allocated share of income, losses, deductions, and credits.4Internal Revenue Service. Instructions for Schedule K-1 (Form 1120-S) The K-1 is required even if every line is a loss or a zero. It is the document that carries the corporate loss from the business return onto each shareholder’s Form 1040.
Which Expenses the Corporation Can Deduct
The S-corporation can deduct any expense that meets the “ordinary and necessary” standard under Internal Revenue Code Section 162. The expense has to be common in your type of business and helpful to its operations. Rent, utilities, software subscriptions, office supplies, professional fees, and employee wages all qualify.5Office of the Law Revision Counsel. 26 U.S. Code 162 – Trade or Business Expenses These are reported on page one of Form 1120-S and subtracted from the zero gross income figure to produce the corporate loss.
Startup and Organizational Costs
New S-corps almost always incur costs before earning their first dollar. The tax code separates these into startup costs (market research, pre-opening advertising, employee training) and organizational costs (legal fees for incorporation, state filing fees, drafting bylaws). Each category has its own election with identical dollar limits.
For each category, you can elect to deduct up to $5,000 immediately in the year the business begins operations. That $5,000 shrinks dollar-for-dollar once total costs in that category exceed $50,000, and it disappears entirely at $55,000.6Office of the Law Revision Counsel. 26 USC 195 – Start-Up Expenditures Any amount you cannot deduct immediately gets amortized evenly over 180 months, beginning with the month business operations start.7Office of the Law Revision Counsel. 26 USC 248 – Organizational Expenditures Because the categories are treated separately, an S-corp with both types of costs under $50,000 each can deduct up to $10,000 immediately.
One important wrinkle: the immediate deduction and the amortization clock both start in the year the business begins operations. If your S-corp exists on paper but has not actually commenced business, you may be sitting on these costs until it does.
Health Insurance for Shareholder-Employees
If the S-corporation pays health insurance premiums for a shareholder who owns more than 2% of the stock, the corporation deducts those premiums, but they must be reported as wages in Box 1 of the shareholder-employee’s W-2. They are not subject to Social Security, Medicare, or unemployment taxes.8Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues The shareholder-employee then claims an above-the-line deduction for the premiums on their personal return.
Paying Yourself When There’s No Cash
S-corp owners hear constantly that they must pay themselves a “reasonable salary” before taking distributions. That rule operates differently in a year with no revenue and no distributions. Treasury guidance provides that corporate officers who perform no services, or only minor services, and who receive no compensation are not treated as employees for payroll tax purposes.9Internal Revenue Service. Wage Compensation for S Corporation Officers (FS-2008-25)
The analysis shifts the moment a shareholder-employee is actively working in the business and receiving cash or property. At that point a reasonable salary has to be set and payroll taxes paid on it. In a pre-revenue year where you are building the business but not drawing anything out, the safest approach is to document the situation thoroughly and set up a reasonable salary before any distributions begin flowing.
Four Hurdles the Loss Must Clear on Your 1040
The loss on your K-1 is not automatically deductible. It must pass four tests, applied in order. A loss that fails any test gets suspended and carries forward to a future year when conditions improve. This is where most zero-income S-corp deductions get tripped up.
Hurdle 1: Stock and Debt Basis
Your deductible loss cannot exceed your combined stock basis and debt basis in the S-corporation.10Office of the Law Revision Counsel. 26 U.S. Code 1366 – Pass-Thru of Items to Shareholders Stock basis begins with whatever you contributed, in cash or property. From there it moves like a running ledger: up for additional capital contributions and allocated income, down for distributions and allocated losses.11Office of the Law Revision Counsel. 26 USC 1367 – Adjustments to Basis of Stock of Shareholders, Etc.
If the allocated loss exceeds your stock basis, you can draw on debt basis to absorb the excess. Debt basis only exists when you personally lend money to the S-corporation, and the loan has to be a real transaction with documentation. Guaranteeing a bank loan to the corporation does not create debt basis.12Internal Revenue Service. S Corporation Stock and Debt Basis Shareholders who co-sign a line of credit and claim the full loss on that basis routinely lose the argument with the IRS.
Once both stock and debt basis hit zero, any remaining loss is suspended. It carries forward indefinitely and becomes deductible in a later year when basis is restored through new contributions or company earnings.
Hurdle 2: At-Risk Limitation
Loss that clears the basis test must then pass the at-risk test under Section 465, reported on Form 6198.13Internal Revenue Service. Instructions for Form 6198 You can only deduct losses up to the amount you could actually lose financially. Your at-risk amount includes cash and property you contributed plus any amounts you borrowed for which you are personally on the hook for repayment.14Office of the Law Revision Counsel. 26 USC 465 – Deductions Limited to Amount at Risk
Nonrecourse loans, where the lender can only pursue business assets, generally do not count. The exception is qualified nonrecourse financing secured by real property used in the activity. For most new S-corps without real estate, the at-risk figure will track closely with the basis figure, but the two calculations are independent and both have to be met.
Hurdle 3: Passive Activity Loss Rules
Loss that survives basis and at-risk then faces the passive activity rules under Section 469, reported on Form 8582.15Internal Revenue Service. Instructions for Form 8582 – Passive Activity Loss Limitations Losses from a passive activity cannot offset wages, interest, or other non-passive income. Your S-corp activity is passive unless you materially participate in it.
Material participation requires meeting at least one of seven tests. The most straightforward is logging more than 500 hours of work in the activity during the tax year.16eCFR. 26 CFR 1.469-5T – Material Participation (Temporary) Other tests cover situations where your participation makes up substantially all the work done in the activity, or where you participated for at least 100 hours and no one else participated more. A founder running a new S-corp solo usually clears the 500-hour test easily, even in a pre-revenue year spent building the business.
If you do not materially participate, the loss can only offset passive income from other sources, such as rental properties or other passive business interests. Otherwise it is suspended. Suspended passive losses carry forward indefinitely and become fully deductible when you sell your entire interest in the activity in a taxable transaction to an unrelated buyer.17Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited
Hurdle 4: Excess Business Loss Cap
Even after clearing the first three tests, non-corporate taxpayers face one more limitation. Under Section 461(l), you cannot use business losses to offset more than a set threshold of non-business income in a single year. For 2026, that threshold is roughly $256,000 for single filers and $512,000 for joint filers, adjusted annually for inflation. Any business loss over the cap converts into a net operating loss carryforward for the following year. This provision applies through at least 2028.
Most pre-revenue S-corps with modest first-year expenses never bump into this cap. It matters for shareholders who sank serious capital into a startup and generated a large first-year loss. If your allocated loss is substantial, check it against the threshold before counting on the full deduction.
How Long Can You Keep Reporting Losses?
An S-corporation that reports losses year after year with little or no revenue will eventually draw IRS scrutiny. Section 183 creates a rebuttable presumption: an activity that shows a profit in at least three of the last five tax years is presumed to be a for-profit activity.18Office of the Law Revision Counsel. 26 U.S. Code 183 – Activities Not Engaged in for Profit Failing the test does not automatically make your business a hobby, but it shifts the burden to you to prove a genuine profit motive.19Internal Revenue Service. Is Your Hobby a For-Profit Endeavor
The IRS looks at whether you keep complete books and records, whether you changed operations to try to improve profitability, whether you have relevant expertise, and how much time and effort you put into the activity. For a new S-corp in its first or second year with zero revenue, a documented business plan, evidence of marketing, and records of time spent developing the business help establish legitimacy. If the IRS later reclassifies your activity as not for profit, it can disallow the losses you claimed in earlier years, and you would be looking at back taxes, interest, and accuracy-related penalties on top. Build the evidentiary record from the start.
Don’t Forget State Filings
Federal compliance is only part of the picture. Most states require S-corporations to file annual or biennial reports and pay fees to keep their corporate status active. Some states impose a minimum franchise tax or business privilege tax regardless of income. These range from negligible to several hundred dollars per year, but ignoring them can lead to administrative dissolution, which would terminate your S-election. Budget for these recurring costs even when revenue is zero, and treat the state compliance calendar with the same seriousness as the federal deadline.