Key takeaways
- Wyoming has no individual or corporate income tax, so there is no state S corporation return, no state extension form and no entity-level income tax.
- The recurring state charge is the annual report license tax: the greater of $60 or $.0002 per dollar of Wyoming assets, due in the anniversary month of formation.
- Federal Form 1120-S for calendar 2026 is due March 15, 2027 by the statutory rule, and Form 7004 extends filing but not payment.
- A Wyoming S corporation with customers, employees or property in another state may owe that state's filings, and its shareholders may owe returns where they live.
There is no Wyoming S corporation return
The state's own portal says that, unlike other states, Wyoming does not possess an individual or corporate income tax. For an S corporation that means no state return that mirrors Form 1120-S, no state minimum tax, no state extension form and no state K-1. The federal return and the shareholder K-1s carry the whole income tax filing.
Many formation-company pages blur the annual report into a tax return. Keep the two apart in the client file. The annual report is a good-standing filing with the Secretary of State, and missing it can cost the client the company, which is worse than a late return.
Because there is no state income tax, there is nothing for a pass-through entity elective tax to reduce and no nonresident shareholder withholding or composite return to run for Wyoming income. That is my reading of the missing tax rather than a rule I found written down, so if a client reports Wyoming-source income to a nonresident owner, confirm with the Department of Revenue before telling the client nothing applies.
The annual report and license tax
Every domestic and foreign entity must file an annual report with the Wyoming Secretary of State to stay in good standing, and the due date is based on the anniversary month of formation. A corporation formed in June owes its report in June every year, regardless of its tax year. Do not put it on the March 15 calendar.
The license tax is $60 or two-tenths of one mill on the dollar ($.0002), whichever is greater, applied to assets located and employed in Wyoming. An entity with $300,000 or less in assets pays $60. Worked example: a client with $1,000,000 of Wyoming assets pays 1,000,000 times .0002, or $200. A client with $250,000 pays the $60 floor.
Ask for the asset figure the client will actually use. A client who runs a Wyoming holding company with equipment in Colorado reports only the assets located and employed in Wyoming, so the balance sheet total is the wrong number to copy over. Tie the figure to the fixed asset schedule and note the basis in the workpapers.
The consequences are steep. The Secretary of State treats an entity as delinquent on the second day of the month after the due date, and an entity that does not file within 60 days after the due date will be administratively dissolved. Online filing adds a payment-processor convenience fee on top of the tax.
Federal Form 1120-S dates for tax year 2026
Form 1120-S is due by the 15th day of the third month after the tax year ends. For tax year 2025 that was March 16, 2026, because March 15 fell on a Sunday. For tax year 2026 the same rule gives March 15, 2027, which falls on a Monday.
Form 7004 gives an automatic six-month extension of time to file, and it has to be filed by the regular due date. It does not extend the time to pay, and interest runs from the regular due date.
The late-filing penalty in the 2025 instructions is $255 per month, up to 12 months, multiplied by the number of shareholders when no tax is due. Example: a two-shareholder corporation that files three months late pays 255 times 2 times 3, or 1,530 dollars. Each late or wrong Schedule K-1 can also carry a $340 penalty. These are the figures for returns due in 2026, so check the 2026 instructions for any indexing before quoting them for the 2027 filing.
S corporations required to file 10 or more returns in a calendar year must e-file Form 1120-S. A firm with many small S corporation clients should count its own filings before assuming paper is an option.
When a Wyoming S corporation still owes another state
Wyoming is a place of formation and sometimes of residence, but it does not stop other states from taxing the activity. Ask three questions in the intake. Where do employees work, where is property kept, and where are customers served? A single yes outside Wyoming is a reason to check that state's registration and filing rules.
Ask the same of the shareholders. A shareholder who lives in Wyoming and receives a K-1 from an S corporation operating in another state may owe a return in that state, and the other state may require the entity to withhold or file a composite return. Those rules vary, so confirm them with the other state's revenue site and do not assume Wyoming's lack of tax travels with the client.
A shareholder who lives in another state while the company is in Wyoming faces the reverse: the home state may tax the K-1 income, so note each shareholder's state of residence on the K-1 worksheet.
Sales and use tax and other state registrations
The Department of Revenue's Excise Tax Division collects sales, use, lodging, cigarette and estate tax. A client that sells taxable goods or services in Wyoming should confirm its sales tax registration and filing frequency with the Division. A pure services company may have none, so confirm instead of assuming.
Reasonable shareholder compensation is a federal issue and does not change because Wyoming has no income tax.
Match the payroll reports to the wages on the 1120-S before filing, since a mismatch is the first thing a notice will question.
Documents to collect from the client
For the federal return, collect Form 2553 (which must be signed by all the shareholders) and the IRS acceptance letter, the year-end trial balance, bank and loan statements, payroll reports and the fixed asset schedule. Collect Form 8825 detail if the corporation owns rental real estate, since it comes first in the attachment order.
For each shareholder, collect the name, address, state of residence, ownership percentage on every day of the year and any stock transfers. Ask for basis records and loan documents, because K-1 losses are limited by basis.
For the state, collect the annual report anniversary month, last year's confirmation, the registered agent's name, the Wyoming asset figure and the sales tax account number if one exists. The client can upload all of this to one request in Usual and mark items it does not have as not applicable, so the file records that the question was asked.
Send this wording: "For your Wyoming S corporation we need three things beyond the usual tax documents: the month on your last annual report confirmation, the total value of assets you keep in Wyoming, and a list of any state where your employees work or you ship to customers. If any of these do not apply, tell us and we will note it.".
Failure modes and fixes
Preparing a state return that does not exist. The fix is an engagement letter line that says the Wyoming scope is annual report review and sales tax confirmation only, so the client does not expect a state return.
Treating the annual report as a tax-season task. It runs on the formation anniversary, so a corporation formed in February can be dissolved while the firm is busy with March returns. Put the month on the client record and set a reminder 30 days before.
Using total assets for the license tax. Use assets located and employed in Wyoming, and keep the support.
Missing the other state. A client who says it has no state return because it is in Wyoming but ships inventory to customers elsewhere needs a nexus review before the 1120-S is filed.