LLC Compliance Calendar: Six Recurring Dates

The studio was registered in four states, and for two years my compliance system was four repeating events in a shared calendar, each titled "Annual Report" plus a state abbreviation. Every event had a date on it. Two of the four were wrong.

Not wrong because a state had changed anything. Wrong because I had copied a date off a screen that was showing me a computed answer, and the calendar repeated my copy every year while the rule underneath kept computing something else. One was a filing that only happens in alternate years. The other was anchored to a month rather than a day, with a window that opened five months before the date I had written down.

That is the whole problem: the state stores a rule, and you wrote down a date.

Here are the six rules a small LLC usually has, and what each entry needs to say to still work in three years.

The state report: a rule about your formation month, or a rule about the calendar

Filing offices split into two families, and knowing which one you are in matters more than this year's date.

The anniversary family anchors to formation or registration. California publishes the arithmetic as a table: month of formation or registration in one column, the filing period in the next. An entity formed in March files its Statement of Information between 1 October and 31 March. And because "California Nonprofit Corporations and all Limited Liability Companies are required to file every two years in the month of registration in even or odd years based on the year of registration," an LLC's window opens only in alternate years (California Secretary of State, Statements of Information Filing Tips and Business Entities FAQ, both read 28 August 2026).

That was the entry I got wrong. A date correct in odd years and simply absent in even ones looks exactly like a date, right up until the year it means nothing.

Colorado does the same thing with different vocabulary. Each entity has a "Periodic report month," shown on its Summary page in the business database, and the report "can be filed two months prior to the Periodic Report month or two months after without any penalty." The office spells out what happens next with a worked example: "If the Periodic Report Month is January, the report due date will be March 31st. If the Periodic Report is not filed on or before March 31st, the entity's status will become Noncompliant, and a late report will be due by May 31st. If the Periodic Report is not filed on or before May 31st, the entity's status will be changed to Delinquent" (Colorado Secretary of State, Business FAQs, read 28 August 2026). Five months of runway, two named statuses, one anchor month.

The fixed family ignores your formation date. Pennsylvania sets its windows by what kind of association you are: 1 January to 30 June for business and nonprofit corporations, 1 January to 30 September for domestic and foreign LLCs, and 1 January to 31 December for limited partnerships, LLPs, business trusts and professional associations (Pennsylvania Department of State, Annual Reports, read 28 August 2026). One state, three deadlines, and the one that applies to you was decided by a word on your formation document.

Both offices then say the thing worth pinning above the calendar. Pennsylvania mails a reminder at least two months out and states that "failure by the Department to deliver notice to any party, or failure by any party to receive notice ... does not relieve the association of the obligation." Colorado runs an email notification service and, on the FAQ page describing it, labels its own messages: "Emails from our office are a courtesy. Each person or entity is responsible for filing the periodic report or renewal, regardless of notification" (Colorado Secretary of State, Email notification FAQs, read 28 August 2026). Both are saying their mail is a courtesy. What starts when you rely on it anyway is a sequence with named stages and its own clock.

The entity-level tax runs on its own schedule, in its own building

The second date is the one people assume is the first. In some states the report goes to the filing office while a separate privilege or franchise tax goes to the revenue department, on a different date, under a different account number, behind a different login. In others the tax office collects both and there is no separate report at all.

Because the split varies, this entry cannot say "state fee." It has to name the agency. The three envelopes that arrive looking identical come from three different offices, and sorting them by sender rather than by amount is the same discipline applied to paper.

The federal return date is decided by how many owners you have

Your LLC does not have a federal return date. Its tax classification does.

A single-member LLC treated as a disregarded entity reports on Schedule C with the owner's Form 1040, due the fifteenth day of the fourth month after the end of the tax year. A multi-member LLC defaulting to partnership treatment files Form 1065 on the fifteenth day of the third month after the end of the partnership's tax year, and has to get each member a Schedule K-1 by that same date. An LLC that elected S corporation treatment files Form 1120-S, also on the fifteenth day of the third month (IRS Publication 509 (2026), Tax Calendars, read 28 August 2026).

Store the rule and the entry survives a change in membership. It also survives the weekend shuffle. Publication 509 says that generally, when a due date falls on a Saturday, Sunday or legal holiday, "the due date is delayed until the next day that isn't a Saturday, Sunday, or legal holiday." The fifteenth day of the third month for a calendar-year 2025 partnership was Sunday 15 March 2026, so the return was due Monday the sixteenth. Form 7004 buys an automatic six-month extension, and the publication's words for it repay reading: extension of time to file.

Four payment dates that are not three months apart

If the LLC's income lands on your personal return, the fourth clock is estimated tax, and it is the one most often mislabelled as quarterly. Publication 509 puts the payments on the fifteenth day of the fourth, sixth and ninth months of your tax year, and on the fifteenth day of the first month after your tax year ends.

For a calendar-year filer that is 15 April, 15 June, 15 September, then 15 January. Count the gaps: two months, three, four. Nothing here repeats every ninety days, which is exactly why an entry titled "quarterly estimated tax" set to repeat every three months drifts off the real dates inside a single year. All four fall on weekdays this cycle, so none of them shifts.

The two filings where somebody else picks your frequency

The fifth clock exists only if you collect a state tax or run payroll, and its defining feature is that the frequency is handed to you.

Washington's Department of Revenue puts the assignment in the welcome packet next to the account ID: "Filing frequencies are assigned based on what you estimate for your yearly business income," with annual filing at an annual tax liability of 1,050 dollars or less, quarterly from 1,051 to 4,800, monthly above that. Monthly returns are due on the 25th, quarterly returns at the end of the month following the quarter, annual returns on 15 April, and the frequency can be updated by phone (Washington Department of Revenue, Filing frequencies and due dates, read 28 August 2026). A quiet quarter does not remove the filing, either: the department keeps a separate route for reporting no business activity, including an express online return that needs no login and a phone line where, at the greeting, you enter "111" and then your nine-digit account ID (Washington Department of Revenue, Report no business activity, read 28 August 2026).

Federal payroll behaves the same way. Form 941 is due the last day of the month after each calendar quarter: 30 April, 31 July, 31 October, 31 January. Form 940, the Forms W-2 and W-3 to the Social Security Administration, and Form 1099-NEC with Form 1096 all land on 31 January. Deposit everything on time and you get ten extra days to file the return (IRS, Employment tax due dates, read 28 August 2026). Now watch the weekend rule work on that cluster: 31 January 2026 was a Saturday, and Publication 509 accordingly tells employers to give employees their 2025 Forms W-2 by 2 February 2026.

The renewals that arrive as invoices instead of notices

The sixth clock has no government office behind it, which is why it goes missing. Your registered agent service renews on a commercial anniversary set by the day you signed up, not by anything in the state record. Your city or county business licence renews on a date set by whichever jurisdiction governs your address, and it appears in no state database you would think to check.

Neither produces a delinquency notice from your filing office. The first produces a gap in the agent record, which does. The second produces a municipal collection problem that in most places never touches your entity status. Two unrelated failure modes, one calendar line each.

What each entry has to contain to still work next year

Six entries, each carrying more than a date. Write the agency's own name, spelled the way it spells it, because "the state" is two or three separate offices. Write the exact document name: Periodic Report, Statement of Information, Annual Report DSCB:15-146, Form 941. Write the rule in words rather than the answer it produced this year, so that "last day of the anniversary month, alternate years" outlives any particular March. Write the anchor fact the rule consumes: your formation month, your tax year end, the frequency you were assigned. And write the address you actually pay on, reached by searching for the agency and finding your own record, never the one printed in an envelope.

Then set two reminders per entry instead of one: the day the window opens, and fourteen days before it closes. The second is the one that saves you. The first is what stops the panic filing, because some windows are enormous. California's runs six months. Pennsylvania's, for an LLC, runs nine.

The IRS publishes a downloadable calendar in Publication 509 and an online tax calendar to copy dates from. Use them for the federal entries, remembering what they are: a calendar that knows nothing about your formation month, your city, or your agent's billing cycle.

Rules move, and 2027 is already an example

Build this once and it still needs a yearly read, because the rule under an entry can change while the entry looks identical.

Pennsylvania is the clean current case. Act 122 of 2022 created the annual report requirement beginning in 2025 with a deliberate transition period, and the department states that "Beginning with Annual Reports due in 2027, associations that fail to file annual reports in the 2027 calendar year will be subject to administrative dissolution/termination/cancellation six months after the due date of the Annual Report." A Pennsylvania LLC entry that is a seven-dollar housekeeping task today becomes an entity-ending one in 2027, and nothing on your screen announces the change. Colorado publishes a related countdown from the other end: a delinquent entity's name is held for 400 days from the date of delinquency, after which it is altered and the original released for anyone else to take.

So the yearly half hour goes like this. Open the six sources, confirm each rule still says what your entry claims, then read your own status on the state's record instead of assuming that no news was good news. Every window, threshold and date above came off an agency's own page and was read on 28 August 2026. The mechanisms tend to hold and the numbers do not, which is why the last field in every entry should be the link you will re-read next August.