Last reviewed October 7, 2026 · By the NYBACS advisory team
Short answer
Usually yes — if you are still choosing the name, leave periods out of the legal name. IRS systems accept only letters, numbers, hyphens and ampersands in a business name, so "Acme Labs, Inc." is recorded as "Acme Labs Inc". A period is not illegal and does not invalidate anything, but a name that reads identically at the state, the IRS and the bank removes a recurring source of KYC and filing friction.
Key takeaways
- IRS Publication 1635 lists four characters its systems accept in a business name: letters A–Z, numbers 0–9, the hyphen (-) and the ampersand (&).
- A name such as "Jones.com" has to be entered as "Jones Dot Com" or "Jones Com" on the EIN application, and a slash can be replaced with a hyphen.
- Delaware accepts "LLC" without periods as an LLC designator, and allows corporate designators such as "Inc" with or without punctuation.
- A punctuation difference between the state record and the IRS record is not a legal defect, but it is often the first item a bank or payment processor queries.
- Renaming after formation means a state amendment plus updates with the IRS, banks and counterparties, so the decision is cheapest before filing.
What the IRS name field actually accepts
The IRS tells applicants that its online EIN application accepts only four kinds of character: letters, numbers, the hyphen and the ampersand. Anything else — periods, commas, apostrophes, slashes, plus signs, the @ symbol — has to be dropped, replaced or spelled out. The IRS's own example is a business called Jones.com, which it says can be entered as "Jones Dot Com" or "Jones Com".
Form SS-4, used by foreign applicants who apply by fax or mail, asks for the legal name "exactly as it appears" on the charter. In practice the number is still issued against a simplified name, and the IRS confirmation letter will show it that way. Typical outcomes look like this:
| Name filed with the state | How it typically appears in IRS records |
|---|---|
| Brightpath Software, Inc. | Brightpath Software Inc |
| Acme.ai LLC | Acme AI LLC or Acme Dot AI LLC |
| North/South Trading Corp. | North-South Trading Corp |
| Patel & Rao Consulting L.L.C. | Patel & Rao Consulting LLC |
None of these is an error. The question is whether you want your company to live with two spellings of its own name for the rest of its life.
Where the mismatch causes real friction
A missing period rarely matters to the IRS itself. It matters at the points where a person or a system compares documents side by side:
- Bank onboarding. Compliance teams line up the certificate of incorporation, the EIN letter (CP 575 or Letter 147C) and the account application. A different spelling on each one tends to generate a query, and a query adds days.
- Payment processors and marketplaces. Platforms verify the legal name and EIN together. If the name you type does not match what the IRS holds, verification can stall until you upload the EIN letter.
- Client vendor forms. US customers ask for a Form W-9 and may run the name and EIN through IRS TIN matching before paying you.
- Overseas use. Non-US founders often send the same certificate, apostilled, to a home-country bank, parent-company auditor or regulator — adding a third and fourth place where the name must line up.
Each mismatch is explainable. The cost is that you have to keep explaining it.
What state rules let you use instead of periods
Most states require an entity designator, and most accept it without full stops:
- Delaware LLCs must include "Limited Liability Company", "L.L.C." or "LLC". Choosing "LLC" gives you a designator the IRS can reproduce exactly.
- Delaware corporations must include a word such as "Incorporated", "Corporation", "Company" or "Limited", or an abbreviation of one, and the statute expressly allows the abbreviation with or without punctuation. "Acme Labs Inc" is therefore a valid Delaware corporate name.
- Commas before the designator are a style habit, not a legal requirement in most states. They are also not an IRS-accepted character.
Other states publish their own designator lists, so check the formation state's rules before filing rather than assuming Delaware's apply everywhere.
How to choose a system-friendly legal name
- Separate the brand from the legal name. Your logo, website and app store listing can say "acme.ai". The legal entity does not have to.
- Draft the legal name with letters, numbers, spaces and, if needed, a hyphen or ampersand, followed by a designator without periods.
- Run two separate checks: state name availability (is it distinguishable from existing entities?) and trademark clearance (can you use it commercially?). Passing one says nothing about the other.
- Use one exact string everywhere — articles, Form SS-4 line 1, operating agreement or bylaws, bank application, W-9 and contracts.
- If you trade under a different name, register an assumed name (DBA) where your state or county requires it, and give it on Form SS-4 line 2 as the trade name.
If your company already has a period in its name
There is usually no need to amend just to remove punctuation. Keep the stamped certificate and the IRS letter together, and when a bank or platform queries the difference, explain that IRS systems do not store periods or commas. Use the legal name with punctuation on contracts and corporate records, and the IRS version wherever an IRS-matched name is requested.
An amendment becomes worth considering when you are already changing something else — a rebrand, a conversion or a new financing round — because it involves a state filing, notifying the IRS of the name change, and updating banks, processors, contracts and any apostilled documents held abroad.
Common mistakes to avoid
- Choosing a domain-style legal name such as "Acme.io Inc." and then typing it three different ways across the IRS, the bank and the payment processor.
- Assuming the CP 575 letter is wrong because the commas and periods are missing, and asking the IRS to "correct" a name it cannot store.
- Filing as "L.L.C." with the state but writing "LLC" on the operating agreement and bank forms, so no two documents match exactly.
- Treating a successful state name availability search as trademark clearance.
- Amending the legal name only to remove punctuation without weighing the knock-on updates at the IRS, banks and overseas registries.
NYBACS 360° support
How NYBACS helps
- Reviews your proposed legal name before filing against the IRS character set and the formation state's designator rules.
- Prepares Form SS-4 so the legal name and trade name lines match the filed charter as closely as IRS systems allow.
- Assembles a name-consistency pack — certificate, EIN letter, operating agreement or bylaws — with a short explanatory note for banks and payment processors where punctuation differs.
- Coordinates a name amendment and the related IRS, bank and registry updates if you decide a change is worthwhile.
Frequently Asked Questions
Will the IRS reject my EIN application if the legal name contains a period?
Generally no. You enter the name without the unsupported characters, either dropping them or spelling them out, and the EIN is issued to the entity. The IRS record and confirmation letter will simply show the simplified version.
Can a Delaware corporation use "Inc" without a period?
Yes. Delaware's corporation statute allows the required designator to be abbreviated with or without punctuation, so "Inc" and "Corp" are acceptable. Other states have their own lists, so confirm the rule in your formation state.
Is an ampersand safe to use in a legal name?
It is one of the four characters IRS systems accept, so it survives the EIN application. Some third-party forms and software fields still handle it awkwardly, and spelling out "and" avoids the issue entirely if you have no strong preference.
Which version of the name should go on a Form W-9?
Use the company's legal name. If a client's TIN-matching check fails, the version shown on your CP 575 or Letter 147C is the one the IRS holds, and sending a copy of that letter usually resolves it.
Does my brand name have to match my legal name?
No. Many companies trade under a stylized brand while keeping a plain legal name. If you invoice or contract under the brand, register it as an assumed name where required so the link between the two is on record.
