How to search
Colorado LLC names

The Colorado naming rules

Every state writes its own LLC naming rules. Colorado's rules cover three areas: what words you have to include, what words you can't use, and how distinct your name has to be from every other Colorado entity on file.

What you have to include

• The name must end in one of: "LLC," "L.L.C.," or "Limited Liability Company." Colorado accepts variations in spacing and punctuation but the statutory ending is required.
• The name must be in letters, numerals, or standard punctuation the Colorado Secretary of State's filing system accepts. Emoji, non-standard symbols, and most diacritics are rejected.

What you can't use

• Words implying a different entity type: "Corporation," "Corp.," "Incorporated," or "Inc." are not permitted in LLC names.
• Restricted professional terms ("bank," "trust," "insurance," "engineering," "architecture" and similar) usually require licensure and preapproval from the relevant Colorado regulatory body.
• Names that could be confused with a government agency — federal, Colorado state, or municipal.

Distinguishability

Colorado will reject a name that is the same as — or confusingly similar to — an existing Colorado LLC, corporation, partnership, or reserved name. "Confusingly similar" is a judgment call made by the Colorado Secretary of State, not an algorithm; small differences like "Acme Holdings LLC" vs. "Acme Holding LLC" can be rejected.

How to search the Colorado database

1. I.

   Go to the Colorado Secretary of State search tool

   The Colorado business entity search lives at sos.state.co.us. Look for "Business Entity Search" or "Name Availability Search" in the main navigation.

2. II.

   Search with multiple variants

   Don't just search the full name — try the distinctive keyword alone, the keyword with and without the "LLC" ending, and the plural/singular forms. A name that passes a "begins with" search can still collide on a "contains" search.

3. III.

   Check for trademark collisions

   The Colorado database only tracks state entity names — it does not check federal trademarks. For a business you plan to brand nationally, also run a USPTO TESS search before committing.

4. IV.

   Confirm the domain

   If the exact match .com is taken by a competitor, treat that as a warning flag — not about state availability, but about everyday confusion in the market.

Should you reserve the name?

Colorado allows name reservation for a fee, typically held for 60 to 120 days. If you're ready to file within a week or two, there's no reason to reserve — just file the Articles directly and the name locks when the LLC is approved. Reservation makes sense if you've picked a name, need to secure it, but aren't ready to file (for example, because you're still finalizing the operating agreement or capital structure).

When you reserve with us, we file the Colorado name-reservation form and hand you the confirmation. Reservation fees are a pass-through Colorado state cost; our service fee is still $299 whether or not you reserve.

What we check before filing

A formation specialist runs the Colorado database before submitting your Articles. If your first choice is taken or likely to be rejected for similarity, we call before filing — we do not submit a filing that isn't going to clear. You tell us your preferred name plus two alternates on the reservation form and we work through them in order.

What's included in the $299 flat fee