To name a corporation, choose a name that ends in a required legal designator such as “Corporation,” “Incorporated,” “Company,” or “Limited” (or the abbreviations Corp., Inc., Co., or Ltd.), make sure it is distinguishable from every entity already on file with your state’s business filing office, avoid restricted words that imply government or regulated-industry activity, and then either reserve the name or register it by filing articles of incorporation. That is the short version. The rules behind each step are where filings get rejected, so it is worth walking through them before you commit to letterhead.
The Required Legal Designator
Every corporate name must include a word or abbreviation signaling that the business is a corporation rather than an individual or informal venture. The universally accepted options are “Corporation,” “Incorporated,” “Company,” and “Limited,” along with their abbreviations Corp., Inc., Co., and Ltd. Leave the designator off and the filing office will reject your paperwork.
A handful of states accept additional designators like “Professional Corporation” or “P.C.” for licensed professionals, but the four standard options work everywhere. The point of the requirement is straightforward: anyone signing a contract with your business should know from the name alone that they are dealing with a limited liability entity.
The Distinguishability Rule
Your proposed name must be “distinguishable upon the records” of the state filing office from every entity already registered there. That standard is stricter than most first-time incorporators expect. Before comparing your name against its database, the filing office strips away punctuation, spacing, articles, and the designator itself. What remains has to be meaningfully different from anything already on file.
Differences that typically will not save a name:
- Swapping designators. “Fox Corp.” and “Fox LLC” read as the same name to the filing office, and changing “Inc.” to “Ltd.” does not help.
- Adding or removing articles. “The Birdcage” and “A Birdcage” are treated as identical because “the,” “a,” and “an” are stripped during comparison.
- Punctuation and spacing. “A.B.C. Corp.,” “A-B-C Corp.,” and “ABC Corp.” all collapse to the same string.
- Possessives versus plurals. “Bob’s Consulting” and “Bobs Consulting” are not distinguishable in most states.
You need a substantive difference in the core words. If you are set on a name close to an existing one, some states will accept your filing with written consent from the other entity, or with a court order establishing your right to the name. The court route is expensive and rare at formation.
Restricted and Prohibited Words
States restrict certain words to prevent the public from being misled about what a company actually does. The restrictions fall into two categories.
Words That Imply Government Affiliation
Terms like “Federal,” “Agency,” “Commission,” “Department,” “Bureau,” “Division,” and “Municipal” suggest official authority and are either outright prohibited or subject to heightened scrutiny. The exact list varies by state, but the principle does not: a private business is not permitted to look like a government body.
Words That Imply a Regulated Industry
Words like “Bank,” “Trust,” “Insurance,” “Credit Union,” and “University” require proof that you hold the appropriate charter or license. A company calling itself “Sunrise Bank” without a banking charter would mislead depositors, so states require written approval from the relevant financial regulator before accepting the filing.
The same logic covers professional terms. “Engineering,” “Architect,” and “Certified Public Accountant” trigger a requirement for approval from the state professional licensing board that oversees the profession. Without that approval letter attached to your formation documents, the filing is rejected automatically.
Running the Two Availability Searches
Before you spend time on formation paperwork, confirm the name is actually available. That means two separate searches, and skipping either one creates real exposure.
State Business Records
Start with the online database maintained by your state’s Secretary of State or equivalent filing office. Enter your proposed name exactly and see what comes back. Most databases are free and return results instantly. Have at least two backup names ready, because your first choice being taken is more common than most people expect. This search confirms availability for state registration only.
Federal Trademark Database
A name available at the state level can still expose you to a trademark suit. The U.S. Patent and Trademark Office maintains a free search tool for active registrations and pending applications.1United States Patent and Trademark Office. Search Our Trademark Database Search your core name without the corporate designator, and look for matches not only in spelling but in sound and meaning. Trademark law reaches names that are confusingly similar, not only exact copies.
If you find a matching registration and proceed anyway, federal trademark law allows the trademark holder to seek injunctions, your profits attributable to the infringement, their actual damages, and attorney’s fees in egregious cases. The filing office will not catch this conflict, because state registration and federal trademarks are separate systems.
State Registration Is Not Trademark Protection
This is the most common misconception in corporate naming. Registering with the Secretary of State gives you the right to use that exact name as a legal entity within that one state. It does not give you trademark rights, nationwide protection, or a guarantee that you can use the name in commerce without legal trouble.
A federally registered trademark protects a brand name or logo in connection with specific goods or services across the entire country. The two systems do not communicate: the state filing office does not check the federal register, and the USPTO does not check state corporate filings.2United States Patent and Trademark Office. How Trademarks and Trade Names Differ You can legally incorporate as “Sunrise Technologies, Inc.” in your state and receive a cease-and-desist letter the following week from a company that trademarked “Sunrise Technologies” years earlier.
If the name is central to your brand, plan on filing a federal trademark application after incorporation. State registration protects the legal entity name in state records. A trademark protects your ability to actually use the name in the marketplace.
Locking In the Name
Once the name clears both searches, you have two ways to secure it.
Name Reservation
If you are not ready to file full articles of incorporation, most states let you submit a name reservation application. The reservation holds the name exclusively for a set period, typically 60 to 120 days depending on the state. Fees generally run between $10 and $40. A reservation buys time to finalize incorporation details, secure funding, or line up a registered agent without worrying that someone else will grab the name.
Some states allow renewal, and rules vary. In certain states there must be at least a one-day gap between reservation periods, so you cannot chain reservations indefinitely to hold a name without ever incorporating.
Articles of Incorporation
If you are ready to move now, skip the reservation and file articles of incorporation, which registers the name and creates the corporation in one step. Every state requires this filing to form a domestic corporation. Along with the name, the articles typically include your registered agent, principal office address, and number of authorized shares.
Filing fees vary by state, ranging from around $50 to over $300, with most states falling in the $75 to $175 range. Online filing is available in nearly every state and usually produces a certificate of incorporation or filing acknowledgment within a few business days. Paper filings by mail can take several weeks. Some states offer expedited processing for an added fee.
Once the filing is accepted, the corporation exists under the name you registered, and you can apply for a federal Employer Identification Number from the IRS.3Internal Revenue Service. Get an Employer Identification Number
Using a Different Name Later
A corporation sometimes needs to do business under a name other than the legal name on its articles. A restaurant chain incorporated as “Highland Food Group, Inc.” might want individual locations to operate as “Rosie’s Kitchen.” That requires filing a fictitious business name statement, commonly called a DBA (“doing business as”) registration.
DBA requirements vary. In some states the filing goes to the county clerk where your principal place of business is located, not the Secretary of State. Several states also require you to publish notice in a local newspaper of general circulation, typically once a week for four consecutive weeks, which adds cost beyond the filing fee.
Operating under an unregistered assumed name creates practical problems. Banks may refuse to open accounts in the assumed name, and contracts signed under an unregistered name can create confusion about which entity is bound. If a company officer signs a contract using only the assumed name without disclosing the corporation’s legal name, that officer can face personal liability because the third party did not know they were dealing with a corporate entity.
Registering the Name in Other States
When your corporation does business in a state other than where it was incorporated, you generally need to file for foreign qualification there, and your name has to be available in that state’s records too. There is no guarantee it will be.
If another entity already holds the name, you can seek written consent from the existing holder, though that is often impractical. The more common solution is to register under a fictitious or assumed name in the new state. The foreign qualification filing then reflects both your legal name from your home state and the assumed name used in the new one, for example “Company, Inc. doing business as Company XYZ, Inc.” Track which name applies in which state, make sure contracts reference the correct one, and maintain DBA filings wherever required. If you plan to operate in multiple states, checking name availability in your target states before you incorporate saves real trouble later.
Changing the Name After Formation
If the corporation needs a different name later, you file articles of amendment (sometimes called a certificate of amendment) with the same state office that processed the original incorporation. The new name has to meet every requirement an original name does: correct designator, distinguishable from existing entities, no restricted words without authorization.
A name change typically requires board approval and, depending on state law and your bylaws, a shareholder vote. State filing fees for articles of amendment generally range from $60 to $150. If your corporation is registered as a foreign entity in other states, you will need corresponding amendments in each of those states.
Your EIN stays the same after a name change. You notify the IRS by checking the name-change box on your next annual return (Form 1120 for C corporations, Form 1120-S for S corporations). If you have already filed for the current year, write to the IRS at the address where you filed, signed by a corporate officer.4Internal Revenue Service. Business Name Change Update the name with your bank, insurance providers, state tax authorities, and any professional licensing boards where the corporation is registered.