A series LLC is sold as many "buckets" under one filing, which is why real-estate investors like it. The compliance question that follows is whether each bucket carries its own annual deadline and fee. The answer depends on the state. This page reads three states' own sources: Texas, Delaware and Illinois.
Reviewed October 2, 2026 · each rule below is quoted from the linked source| State | How the state treats the series | Annual consequence, per the source |
|---|---|---|
| Texas | Single legal entity | One franchise tax report and one Public Information Report under one taxpayer ID. If one series has nexus, the whole series LLC does. |
| Delaware | Registered series are filed by certificate | Annual tax of $100 for each registered series, due June 1 after the calendar year its certificate takes effect. |
| Illinois | Series with a certificate of designation | Annual report fee plus $50 for each series whose certificate is in effect on the last day of the third month before the anniversary month. |
The Texas Comptroller's franchise tax FAQ on taxable entities says: "A series LLC is treated as a single legal entity." It continues: "It pays one filing fee and registers as one entity with the Texas Secretary of State. It files one franchise tax report and one Public Information Report as a single entity, not as a combined group, under its Texas taxpayer identification number." On nexus: "If one of the series has nexus in Texas, the entire series LLC has nexus in Texas."
For your calendar, that means one Texas deadline for the whole structure. It is still a report that is due even when no tax is owed; see our Texas guide. [Our reading: the FAQ describes Comptroller filings. We did not read Secretary of State rules on how a Texas series is formed or registered.]
Delaware lets a series be registered by filing a certificate. The Division of Corporations' form for registered series says: "The fee to file the Certificate is $110." On the annual obligation it says: "Annual Taxes in the amount of $100 for the registered series are due by June 1 of each year following the close of the calendar year in which their Certificate of Registered Series becomes effective." The form cites Section 18-218(d)(1) of the Delaware LLC Act for the filing.
Delaware's rule for the LLC itself is separate: the flat $300 annual tax, also due June 1. The form we read gives the $100 figure for the registered series. We did not find, in the sources read, a statement of how the two combine, so confirm the total for your structure with the Division before budgeting. Note the wording "registered series": the form does not address series that are not registered by certificate.
Illinois builds the series charge into the annual report fee. The Limited Liability Company Act, section 50-10(b)(11), as shown in Public Act 100-0571, reads: "the fee for filing an annual report of a limited liability company or foreign limited liability company is [base amount] plus $50 for each series for which a certificate of designation has been filed pursuant to Section 37-40 of this Act and is in effect on the last day of the third month preceding the company's anniversary month, plus a penalty if delinquent."
Two things to take from it. First, the per-series charge turns on the certificate being in effect on a specific date, the last day of the third month before your anniversary month, so the timing of designating or closing a series changes what the next report costs [our reading]. Second, the base amount in the text we read appears inside amendment markup, with two figures shown. Our Illinois guide lists the standard LLC fee as $75. We are not restating a total here. Confirm the current base and per-series total on the Secretary of State's fee schedule before you file.
EntityMinder's free deadline lookup gives the deadline for a single entity by state. If you manage several entities across states, the 50-state table is the place to start.