A UBI number is Washington's nine-digit Unified Business Identifier for a registered business. You may receive one through state business formation or a Business License Application, depending on your entity and activities.
Key Takeaways
- A Washington UBI is a nine-digit state identifier, not a federal tax number.
- An EIN, UBI, and Washington business license serve different purposes, although a business may need all three.
- You can look up a UBI by business name through Washington's official business search systems.
- LLCs, corporations, and certain other entities generally receive a UBI when they register with the Secretary of State.
- Sole proprietors and other businesses may receive a UBI by filing a Business License Application.
- A name, address, ownership, or entity change does not always have the same effect on a UBI.
What Is a UBI Number in Washington?
UBI stands for Unified Business Identifier. Washington assigns this nine-digit number to identify a business in records maintained by state agencies. The number helps agencies connect the business's registrations, tax accounts, licenses, employer accounts, and other state records.
A Washington UBI is not a universal business number used throughout the United States. It applies to businesses registered or licensed in Washington, including qualifying businesses formed elsewhere that register to operate in the state. A company based outside Washington may therefore have an EIN from the federal government, an identification number from its home state, and a separate Washington UBI.
The UBI usually remains associated with the same legal business while it maintains its Washington registration. It may appear on a Washington business license, formation confirmation, annual report, tax notice, or correspondence from a state agency. State and local offices may ask for it when processing licenses or endorsements.
A UBI identifies the business, but it does not by itself establish that every license is active or that the company is in good standing. Those questions may require checking the applicable agency's current records. The UBI also does not replace formation documents, contracts, professional licenses, or tax registrations.
If you are organizing an LLC, you may need both a state UBI and an LLC tax identification number. Keeping those identifiers separate can prevent errors on applications and tax forms.
UBI vs. EIN vs. Washington Business License
The UBI vs. EIN distinction depends on which government issued the number and what the number identifies. Washington assigns a UBI for state registration and licensing purposes. The Internal Revenue Service issues an Employer Identification Number, also called an EIN or FEIN, for federal tax administration.
A Washington business license is different from both identifiers. It documents the business's state licensing account and may include endorsements authorizing particular activities or locations. The license commonly displays the UBI, but the printed license and the number shown on it are not the same thing.
| Item | Issuer | Primary Role | Common Uses |
|---|---|---|---|
| Washington UBI | Washington state | Identifies the business across Washington systems | State filings, tax accounts, employer registration, and licensing records |
| Federal EIN | Internal Revenue Service | Identifies a taxpayer for federal purposes | Federal tax returns, payroll reporting, and other federal tax matters |
| Washington business license | Washington Department of Revenue's Business Licensing Service | Documents the state business licensing account and applicable endorsements | Operating activities that require state or participating local authorization |
Many companies need all three. For example, an LLC may receive a UBI through its Washington formation, obtain an EIN from the IRS, and then complete a Business License Application for required licenses and endorsements. An LLC owner who still needs a federal number can review how to obtain an FEIN for an LLC.
Use the identifier requested on each form. Do not enter a UBI in an EIN field merely because both numbers identify the business. The IRS EIN guidance explains the federal application and eligibility rules.
How to Complete a UBI Number Lookup
Start a UBI number lookup by checking documents you already have. The number may appear on your Washington business license, Secretary of State filing confirmation, formation record, annual report, Department of Revenue correspondence, or state tax documents. Look for a nine-digit number labeled UBI or Unified Business Identifier.
If those records are unavailable, search the business through an official Washington system. The Department of Revenue provides business lookup services that can help you search by a legal business name or trade name. The results may display the UBI and available licensing information. Begin with the Washington Department of Revenue business resources and select the current business lookup option.
Corporations, LLCs, and other entities registered with the Secretary of State can also be searched through the state's Corporations and Charities Filing System. An entity record may show its UBI, legal name, registration status, filing history, and registered agent information. The specific information available depends on the record.
When searching by name, try the exact legal name first. If the business uses a DBA or trade name, search that name as well. Similar names can produce multiple results, so compare addresses, entity types, and other public details before relying on a number.
A search result can identify a UBI, but it may not answer every compliance question. Licensing, tax, and entity status can be maintained in different systems. Check the agency responsible for the particular filing or authorization you need.
How to Get a UBI Number in Washington State
The correct route for getting a Washington UBI depends on the type of business you are creating. If you are forming a Washington corporation, LLC, limited partnership, or another entity that must register with the Secretary of State, start with the required entity filing. The Secretary of State assigns a UBI as part of that registration process.
After receiving the UBI, use that existing number when completing later Washington applications. Many operating businesses must also apply through the Department of Revenue's Business Licensing Service. Filing a formation document and obtaining a UBI do not automatically provide every license, tax registration, or local endorsement the business may need.
A sole proprietor or general partnership that does not form a separate entity with the Secretary of State may apply through the Washington Business License Application. The state assigns a UBI through that process when the applicant does not already have one.
A business formed in another state generally must determine whether it needs to register as a foreign entity in Washington. If foreign registration is required for that entity type, complete the appropriate Secretary of State registration before using the assigned UBI in related licensing filings. Registration requirements depend on the entity and its Washington activities.
- Identify your legal entity type and whether Secretary of State registration applies.
- Complete the formation or foreign registration filing when required.
- Record the assigned UBI from the approved filing.
- Submit a Business License Application if your activities require licensing, tax registration, trade names, employees, or endorsements.
- Enter the existing UBI on subsequent state forms instead of requesting another one.
Fees and processing options can change. Review each agency's current instructions before submitting an application.
Who Needs a Washington State UBI Number?
Businesses required to register with the Washington Secretary of State receive a UBI as part of that registration. This category generally includes Washington corporations and LLCs, along with foreign entities required to register before conducting business in the state.
Other businesses may need a UBI because their activities require a Washington Business License Application. Common triggers include hiring employees, collecting retail sales tax, registering a trade name, obtaining a state specialty license, or seeking an endorsement from a participating city. State tax obligations can also require registration.
A sole proprietor is not automatically exempt. A proprietor using a name other than the owner's full legal name may need to register that trade name. Hiring employees, making taxable sales, exceeding applicable income thresholds, or performing regulated work can also trigger an application. By contrast, a small sole proprietorship operating only under the owner's legal name, without employees, taxable sales, or licensing obligations, may not need to apply. The owner should check the Department of Revenue's current criteria because the answer depends on actual activities.
Independent contractors are analyzed under the same practical rules. The label alone does not decide whether a UBI is required. Consider the business name, revenue, employees, taxable transactions, professional activities, and locations.
City licensing requirements also matter. Washington's Business Licensing Service processes endorsements for participating cities, while some local governments manage licensing separately. A UBI does not eliminate the need to identify each required state, professional, and local authorization.
If you plan to use a DBA, review the steps for adding a trade name to a Washington LLC before advertising or signing contracts under that name.
What Happens to a UBI After Business Changes?
Not every business change requires a new UBI. The result depends on whether the same legal business continues or a new owner or entity takes over. Treat the UBI as belonging to the registered business, not as a number that can freely transfer with its assets or brand.
A simple address change usually calls for updating existing agency records rather than creating a new business. A legal-name amendment may also keep the existing entity and UBI, but the business must file the appropriate changes with the Secretary of State, Department of Revenue, or other agencies. Adding or removing a trade name generally involves updating the business license account rather than replacing the underlying entity.
Ownership changes require closer analysis. A transfer of membership interests or corporate shares may leave the same LLC or corporation in existence. In that situation, the entity may keep its UBI while updating owners, governors, or other required information. By contrast, an asset sale to a different person or entity generally means the buyer must establish its own registrations. A sole proprietorship changing owners does not remain the same legal business.
Converting from one legal structure to another can also affect the number. Do not assume that moving from a sole proprietorship to an LLC, merging entities, or replacing a partnership requires only an account edit. Review the formation documents, transaction structure, and current agency instructions. The guidance on a Washington business ownership change can help you identify the filings that may apply.
If entity formation, foreign registration, an ownership transaction, or conflicting state records makes the correct path unclear, you can post your legal need on UpCounsel's marketplace. An attorney can review the entity structure and prior filings, determine whether you need a new UBI or an update, and help correct inconsistent agency records. Responses typically arrive within a day.
How to Use and Protect Your Washington UBI Records
Once you receive a UBI, use the same number consistently on Washington filings for that business. Entering an incorrect number can separate related records or delay an application. Confirm the legal name, entity type, address, and UBI before submitting tax, employer, licensing, or annual-report information.
Create a central record containing the formation confirmation, business license, UBI, EIN notice, trade-name registrations, and account information for relevant agencies. Label the UBI and EIN separately. This reduces the risk that an employee, accountant, or filing service will use the state number in a federal field or create a second state record unnecessarily.
Because UBI information may appear in public business records, it should not be treated like a password. Still, verify requests before providing other sensitive information connected with the company. A UBI alone does not give someone authority to act for the business.
Review the business's records after a move, legal-name change, ownership transaction, merger, or dissolution. Updating one agency may not update every license, tax account, or local endorsement. Contact the office responsible for each record and follow its current amendment or closure procedure.
If the business stops operating, closing a tax account or license does not necessarily dissolve an LLC or corporation. Formal entities may need separate filings with the Secretary of State. Owners ending an LLC can review the process for dissolving a Washington LLC. Retain confirmation of closures and amendments so that you can respond to later notices or resolve an outdated public record.
Frequently Asked Questions
What Is a UBI Number for a Business?
A UBI number is Washington's state identifier for a registered or licensed business. It gives agencies a common reference for the business, but it does not prove ownership of a name, authorize every activity, or show that all licenses are current. Review the underlying entity and licensing records when those details matter.
What Is a UBI Number in Washington State Used For?
A Washington UBI connects the business with state administrative records. A bank, customer, vendor, or government office may also request it to match the business with public registration information. Ask which identifier is needed before responding, since some forms use phrases such as tax ID or business number imprecisely.
How Do I Get a UBI Number in Washington State?
You get a Washington UBI through the state filing appropriate to your business. The number will appear after the relevant registration is processed, so retain the confirmation rather than relying on memory. If no number appears or two records conflict, contact the agency that processed the filing before submitting additional applications.
Is a UBI the Same as an EIN?
No, a UBI is not the same as an EIN. One practical difference is that a UBI commonly appears in Washington public business records, while an EIN is a federal taxpayer identifier. Businesses should store the IRS assignment notice securely and avoid substituting one number for the other on banking, payroll, or tax documents.
How Do I Look Up a UBI Number by Business Name?
Use an official Washington business search and enter the legal name or registered trade name. If you cannot find the record, remove punctuation, try an earlier name, or search the entity and licensing databases separately. Businesses with similar names may have different UBIs, so confirm the address and entity details before using a result.
