Three Pieces of Paper, One Confusing Checklist
Every “how to start an LLC” list on the internet throws EIN, DBA, and operating agreement at you in the same three bullet points, like they’re one task with three parts. They’re not. They solve three completely different problems, they don’t all apply to every business, and doing them in the wrong order is one of the more common ways people end up redoing paperwork they already thought they’d finished.
Short version: An EIN is your business’s federal tax ID, a DBA lets you legally use a business name that isn’t your own legal name or your LLC’s registered name, and an operating agreement is the internal document that says who owns what and who decides what. Not every business needs all three. For a solo tradesperson forming an LLC, the order that avoids backtracking is: get the state’s approval first, sign the operating agreement, get the EIN, file the DBA if you need one, then open the bank account.
These Are Three Different Problems, Not One Checklist Item
An EIN, an “employer identification number,” is a nine-digit number the IRS uses to identify your business for tax purposes, the same basic idea as a Social Security number but for the business instead of you personally. Despite the name, you don’t need employees to get one or use one.
A DBA, “doing business as,” also called a fictitious name, trade name, or assumed name depending on the state, is permission to operate publicly under a name that isn’t your own legal name or your LLC’s exact legal name on file with the state. It doesn’t create a business. It doesn’t protect anything. It’s a naming formality, nothing more.
An operating agreement is an internal contract among an LLC’s members (or just you, if you’re the only one) that spells out ownership percentages, who makes decisions, how profits get split, and what happens if a member leaves or the whole thing dissolves. It’s the rulebook a bank, a court, or a future business partner looks to when a question comes up that the state’s default rules don’t answer the way you’d want.
None of these three has anything to do with whether you’re a sole proprietor or formed an LLC, except that the LLC path makes an operating agreement relevant in the first place, since a sole proprietorship has no ownership structure to document. If you’re still weighing that decision, Going Independent covers the LLC-versus-sole-proprietorship call in full. Everything below assumes you’ve already made that call or are far enough along to be thinking about it seriously.
Who Actually Needs Each One
This is where most checklists fail you, they present all three as universal requirements when the honest answer depends entirely on your structure and your name.
A sole proprietor operating under their own legal name, “Mike Torres Plumbing” when your name is Mike Torres, needs none of these three by default. No EIN requirement, no DBA requirement (your legal name already is the business name), no operating agreement (there’s no ownership structure to document). You could run this entire business on your Social Security number for tax purposes and never touch any of the three, and plenty of people do exactly that for years.
A sole proprietor operating under any other name, “Torres Plumbing & Drain” instead of your own name, needs a DBA. That’s the only one of the three that’s actually triggered by the name choice itself. The EIN is still optional unless you hire an employee, open a Keogh or solo 401(k) plan, or file excise tax returns, and there’s still no operating agreement, since sole proprietorships don’t have one.
A single-member LLC sits in the middle. The IRS still doesn’t require an EIN for a single-member LLC with no employees, by default it’s taxed as what the IRS calls a “disregarded entity,” meaning the income flows straight to your personal return exactly like a sole proprietorship. But in practice, you’ll almost certainly get one anyway, because no bank will open a business account on your Social Security number for an LLC, they’ll ask for the EIN specifically. An operating agreement isn’t federally required either, but several states legally require one regardless of member count, covered in detail below, and every bank that opens an LLC account wants to see one whether your state mandates it or not. A DBA only enters the picture if you want to operate under a name that isn’t the LLC’s exact name on file with the state.
A multi-member LLC needs an EIN, full stop, no exceptions. The IRS taxes a multi-member LLC as a partnership by default, and partnerships are required to have an EIN regardless of employees. The operating agreement stops being a nice-to-have here too, with more than one owner, you genuinely need something in writing that settles who owns what percentage and who has final say before a disagreement forces the question. The DBA rule is the same as everywhere else, only needed if the operating name differs from the legal name on file.
The Order That Actually Works
For the solo-tradesperson-forming-an-LLC path this site is built around, here’s the sequence that gets you through all three without hitting a wall or redoing anything:
The state has to approve your LLC first. You can’t get an EIN for an LLC that doesn’t legally exist yet, and multiple state formation guides flag “applying for the EIN before the state approves the Articles of Organization” as one of the most common ordering mistakes new owners make, since the online EIN application will accept information for an entity that isn’t actually formed yet and then you’re stuck with a mismatch to untangle later. This step needs your registered agent and business address sorted first, covered in Business Address & Registered Agent, since that information goes directly on the Articles of Organization.
Sign the operating agreement next, before you apply for the EIN. Nothing technically stops you from doing this in the other order, but the operating agreement is the document that formally names you (or you and your co-members) as the person or people authorized to act on the LLC’s behalf, and having that settled before you’re the “responsible party” on a federal tax application just keeps things clean and in the right order on paper.
Get the EIN once the state has approved the LLC. It’s free, direct from the IRS, and if you have your formation documents in front of you, it takes about fifteen minutes.
File the DBA, if you need one, once the EIN and the entity itself both exist. Adding a DBA to an existing LLC doesn’t require a new EIN, the DBA is just a name, not a new legal entity, so there’s no ordering conflict here, it just naturally comes after the entity is real and has its tax ID.
Open the bank account last. This is the step where doing the previous four out of order actually costs you time, because the bank wants to see all of it at once: the Articles of Organization, the EIN confirmation letter, the operating agreement, and the DBA certificate if one exists. Show up missing any of them and you’re making a second trip. Business Banking and Bookkeeping covers exactly what the bank asks for and why skipping a real business account undoes a chunk of the liability protection the LLC was supposed to buy you in the first place.
Everything after that, licenses, permits, insurance, is a separate track that can run in parallel with the sequence above rather than strictly after it.
The EIN, In Practice
The EIN application itself is genuinely simple once you understand two things that trip people up: the timing restriction, and the scam sites.
The IRS’s own online EIN Assistant only runs Monday through Friday, 7 a.m. to 10 p.m. Eastern. It’s closed on weekends and federal holidays entirely. If your paperwork routine happens to be a 2 a.m. session after a night shift, this is one government form that genuinely won’t be there when a lot of your other tasks are. Plan the EIN application for a weekday during that window, or use Form SS-4 by fax, which the IRS accepts anytime but takes about four business days to process instead of issuing the number instantly. The online session also has to be completed in one sitting, it times out after 15 minutes of inactivity, so gather your business details (legal name, formation date, address, and your own Social Security number or ITIN as the “responsible party”) before you start rather than mid-application.
The “responsible party” has to be an actual individual, not a company or another entity, a rule the IRS has enforced since 2018 specifically to stop people from using nominees to obscure who really controls a business. For a multi-member LLC, that means the members need to actually agree on who that person is, ideally documented in the operating agreement itself so there’s a paper trail beyond “we just picked someone.”
One real limit worth knowing if you’re forming more than one entity: the IRS only issues one EIN per responsible party per day, whether you apply online, by fax, or by mail. If you’re setting up an LLC for the business and a separate LLC for a rental property in the same week, you can’t get both EINs the same day if you’re the responsible party on both, you’ll need to spread the applications across separate days.
Now the part worth being genuinely careful about. The FTC issued a formal consumer warning in 2025 after tracking websites that use IRS-style seals, logos, and the phrase “EIN Assistant” (the actual name of the IRS’s free tool) to look official, then charge up to $300 for something the government hands out for free in about fifteen minutes. The Better Business Bureau has separately logged complaints on its Scam Tracker from people who paid these sites and received either nothing or a fake number. Companies caught violating the FTC’s impersonation rule face civil penalties up to $53,088 per violation. The tell is simple: the real IRS EIN tool only exists at a .gov domain, specifically irs.gov’s own EIN application page. If a site is charging a fee, asking for a credit card before showing you anything, or doesn’t clearly say up front that it isn’t the IRS, close the tab.
Once you have an EIN, most changes to your business don’t require a new one. Changing your business name or address just needs Form 8822-B filed within 60 days, not a new EIN. What does trigger a new EIN: converting from a sole proprietorship to an LLC or corporation, taking on partners and becoming a partnership, or a single-member LLC that starts hiring employees. If your only change is that you’re now doing business under a DBA, nothing about your EIN changes at all.
The DBA, In Practice
A DBA is a public notice, nothing more. Filing one doesn’t create a new legal entity, doesn’t give you exclusive rights to the name (a trademark is a completely separate process through the USPTO, covered in the name-check section of Going Independent), and doesn’t provide any liability protection whatsoever. If you’re a sole proprietor and you file a DBA for “Torres Plumbing & Drain,” you are still personally on the hook for everything the business does, exactly as you were before, the DBA just lets you legally take checks, sign contracts, and market yourself under that name instead of your own.
Where and how you file one varies more by state than almost anything else covered in this hub, and it’s worth knowing that going in so you’re not caught off guard. Florida handles it entirely at the state level: you file online through Sunbiz.org, pay a $50 fee, and the registration is good for five years before it needs renewing, also for $50. California does the opposite, filing happens at the county level, in the county where your business is located, and most counties additionally require you to publish a notice in a local newspaper before the filing is considered complete. Neither approach is wrong, they’re just different, which is exactly why checking your own state and county’s specific process matters more here than almost anywhere else in this guide. A quick search for “[your state] DBA” or “[your state] fictitious business name,” or a call to your county clerk’s office, settles it fast.
One detail that matters once you have a DBA: contracts should reference both your legal business name and the DBA together. A contract signed only under the DBA name, without the underlying legal entity named anywhere, can run into enforceability problems if a dispute ever ends up in court, since the DBA on its own isn’t a legal party to anything, it’s just a name.
The Operating Agreement, In Practice
This is the one that gets skipped most often, mostly because a lot of states don’t legally require it, so it feels optional. Technically, in 45 states, it is. Practically, skipping it anyway is a mistake for almost every LLC, including a single-member one.
Five states currently require an LLC to have an operating agreement by law: California, Delaware, Maine, Missouri, and New York. Most of these accept an oral or even implied agreement, only New York’s statute specifically requires it in writing, and requires it within 90 days of filing your Articles of Organization under New York LLC Law Section 417. If you’re forming in New York, this isn’t a someday task, there’s an actual clock on it.
Here’s the part that matters even in the other 45 states. Without a written operating agreement, your LLC defaults entirely to your state’s generic statutory rules for how LLCs are supposed to work, rules that were written for no business in particular and rarely match what you actually want. Worse, for a single-member LLC specifically, having a real operating agreement on file is one of the clearest pieces of evidence that your LLC is a genuinely separate business rather than just you with extra paperwork. Business Banking and Bookkeeping covers “piercing the corporate veil,” the legal process where a court disregards the LLC entirely and lets a creditor go after your personal assets, and commingled funds are the most commonly cited evidence in these cases. An operating agreement is part of the same defense, it’s documented proof you treated the business as its own thing from day one, not something you improvised as needed.
For a single-member LLC, the operating agreement is genuinely short, usually a couple of pages covering that you’re the sole owner, you have full authority to act on the LLC’s behalf, and how the LLC would be dissolved if you closed it. For a multi-member LLC, it needs real substance: ownership percentages, how profits and losses get split (which doesn’t have to match ownership percentages exactly, that’s a choice worth making deliberately rather than defaulting to), voting rules for major decisions, and a buyout process for when a member wants out or the partnership needs to end.
No state requires the operating agreement to be notarized, it’s legally binding on signatures alone. A bank occasionally asks for a notarized signature page anyway as its own internal convenience, not because the law requires it. And you don’t need to pay a lawyer to draft one for a straightforward single-member LLC, free templates from your state bar association or the SBA cover the basics fine; a multi-member LLC with real disagreements brewing about money or control is where paying an attorney to draft or review it earns its cost.
The Federal Reporting Fight, Actually Settled Now
If you’ve seen headlines about LLCs needing to report “beneficial ownership information” to the federal government, here’s exactly where that stands, because it changed in a meaningful way recently that’s worth being precise about.
The Corporate Transparency Act would have required most LLCs to report their owners’ information to FinCEN, a bureau of the Treasury Department, with real penalties for skipping it. That requirement went through more than a year of lawsuits, injunctions, and reversals starting in 2024. In March 2025, FinCEN issued an interim rule narrowing the requirement to foreign-formed entities only, exempting every domestic U.S. company. That was still framed as temporary, subject to further rulemaking.
On August 11, 2026, FinCEN made it permanent. The final rule, effective August 14, 2026, removes the BOI reporting requirement for U.S. companies and U.S. persons for good, and FinCEN is deleting the information domestic filers had already submitted from its database. If you’re forming a standard domestic LLC anywhere in the U.S., there is currently no federal beneficial ownership filing obligation, and this is no longer a “for now” situation, it’s a finalized rule, not an interim one that could flip back with the next rulemaking cycle.
One state-level wrinkle worth mentioning if you’ve heard about New York specifically: New York passed its own LLC Transparency Act aimed at requiring similar disclosures at the state level. In December 2025, Governor Hochul vetoed an amendment that would have expanded it to cover domestic LLCs, which means as it actually took effect January 1, 2026, it applies only to LLCs formed outside the United States that are registered to do business in New York. If you’re forming a normal domestic LLC, even in New York itself, this doesn’t apply to you either.
Nothing here is guaranteed to stay this way forever, a future rulemaking or new legislation could always revisit it, but as of where things actually stand today, this is a settled, closed question for the overwhelming majority of readers here, not something to keep half an eye on.
What Actually Goes Wrong When You Skip the Order
The most common mistake isn’t skipping one of these three entirely, it’s doing them out of sequence and then paying for it in time. Applying for the EIN before the state approves the LLC is the single most cited ordering error across state formation guides, it puts you in the position of either waiting on a mismatched application or having to start over once the actual approval comes through. Trying to open the bank account before the operating agreement exists is the second most common, since most banks simply won’t proceed without it, even for a single-member LLC in a state that doesn’t legally require one.
The second-most costly mistake is treating “my state doesn’t require an operating agreement” as the same thing as “I don’t need one.” It’s the difference between a document a court and a bank will actually rely on if something goes wrong, and defaulting to generic state rules that were never written with your business in mind.
And the simplest, most avoidable one: paying anywhere from $50 to $300 for something IRS.gov hands out free in about fifteen minutes. If a site is charging you for an EIN, it isn’t the IRS, no matter how official the logo looks.
Frequently Asked Questions
Not by default. If you have no employees, don’t file excise tax returns, and haven’t set up a Keogh or solo 401(k) plan, the IRS lets you use your Social Security number instead. Plenty of sole proprietors get one anyway for privacy (so you’re not handing your SSN to every client who needs your info for a 1099) or because a bank wants one to open an account, but the IRS itself doesn’t require it in that situation.
No. A DBA is purely a naming formality, it lets you operate under a name that isn’t your legal name or your LLC’s registered name, but it doesn’t create a separate legal entity and provides zero liability protection. A sole proprietor with a DBA has exactly the same personal liability exposure as one without it.
Five: California, Delaware, Maine, Missouri, and New York. Most accept an oral or implied agreement, but New York specifically requires a written one within 90 days of filing your Articles of Organization. In the other 45 states it’s not legally mandated, but banks and courts still rely on it heavily, so skipping it is a real practical risk even where it’s not a legal one.
No, not anymore, and not just temporarily. FinCEN made the exemption for domestic U.S. companies permanent as of August 14, 2026. If you’re forming a normal LLC anywhere in the U.S., including in New York, there’s currently no federal or (for nearly everyone) state beneficial ownership filing requirement at all.
You can try, but it’s one of the most common ordering mistakes people make. The EIN application is for an entity that’s supposed to already legally exist. Wait until you have your approved Articles of Organization in hand, then apply, it keeps everything clean and avoids a mismatch you’d have to sort out later.
No. An EIN is free directly from the IRS and takes about fifteen minutes online. The FTC has formally warned consumers about sites that mimic IRS branding and charge up to $300 for this. If a site is charging you a fee for an EIN, it isn’t the government, regardless of how official it looks.
No. A DBA is just a name, not a new legal entity, so your existing EIN stays exactly the same. You’d only need a new EIN if the business itself changes structure, like converting from a sole proprietorship to an LLC.
It varies by state, but the common consequence is that you lose the ability to enforce contracts signed under that name in court until you’re properly registered, and in some states you can face fines. It doesn’t undo anything you’ve already done, but it can leave you unable to collect on unpaid invoices or defend a contract dispute until the filing is fixed.
Sources
IRS, Instructions for Form SS-4: https://www.irs.gov/pub/irs-pdf/iss4.pdf
IRS, Do You Need a New EIN: https://www.irs.gov/pub/irs-pdf/p5845.pdf
IRS, Understanding Your EIN (Publication 1635): https://www.irs.gov/pub/irs-pdf/p1635.pdf
FTC, warning on EIN filing and delivery services: https://www.ftc.gov/news-events/news/press-releases/2025/04/ftc-warns-operators-websites-charge-employer-identification-number-claim-affiliation-irs
BBB, Business Scam Alert on fake EINs: https://www.bbb.org/article/business/31653-bbb-business-scam-alert-how-to-identify-fake-employee-identification-numbers
FinCEN, final rule permanently ending BOI reporting for U.S. persons: https://www.fincen.gov/news/news-releases/fincen-permanently-ends-beneficial-ownership-reporting-requirements-millions
Morgan Lewis, Governor’s veto limits NY LLC Transparency Act to non-U.S. LLCs: https://www.morganlewis.com/pubs/2026/01/governors-veto-limits-ny-llc-transparency-act-to-non-us-llcs-authorized-to-do-business-in-new-york
Florida Division of Corporations, Fictitious Name Registration: https://dos.fl.gov/sunbiz/start-business/efile/fl-fictitious-name-registration/
CalOSBA, fictitious business name filing requirements: https://calosba.ca.gov/for-small-businesses-and-non-profits/set-up-your-business-in-california/
Save Office, LLC operating agreement state-by-state statutory requirements: https://saveoffice.io/blog/llc-operating-agreement-required-vs-recommended