Why UK Upwork Freelancers Need a U.S. EIN
Upwork freelancers in the United Kingdom often encounter situations where a U.S. Employer Identification Number (EIN) becomes necessary, even though they are not U.S. residents or citizens. This need typically arises when U.S. clients or platforms require a U.S. tax ID for payment processing or to satisfy their own compliance obligations. Unlike U.S. residents who may need an EIN for various business activities, for UK freelancers, the primary drivers are often related to business banking in the U.S. and tax information reporting. Many U.S. banks require an EIN to open a business account, which can streamline receiving payments from U.S. clients. Additionally, certain U.S. payment processors or marketplaces may mandate an EIN to avoid higher backup withholding tax rates. The friction point for many is realizing that a U.S. tax ID is needed for what seems like a straightforward international freelancing arrangement. The IRS requires an EIN for any business entity operating in the U.S. or earning U.S.-sourced income, and for UK freelancers working with U.S. clients, this can sometimes fall into those categories, especially if they are structuring their business as a U.S. entity or if their client's payment system flags them as needing one.
When an EIN is Required for UK Freelancers
The requirement for a U.S. EIN for Upwork freelancers in the United Kingdom most commonly stems from banking and payment processing needs. If you are looking to open a U.S. business bank account, such as with banks like Mercury, Relay, or Brex, an EIN is almost always a prerequisite. These U.S. financial institutions need a tax ID to report account activity to the IRS. Similarly, platforms or clients may request an EIN to simplify their own tax reporting. For instance, if you are receiving substantial payments through a U.S.-based payment gateway, they might require you to provide an EIN to avoid withholding U.S. income tax at the highest rate. While a U.S. LLC formation might necessitate an EIN, many UK freelancers choose not to form a U.S. entity, especially if they primarily operate from the UK. In these cases, the EIN is usually for facilitating business operations with U.S. clients or financial institutions rather than for direct U.S. business operations. It's also important to note that if you plan to hire employees in the U.S. or operate a business physically within the U.S., an EIN is mandatory, but this is less common for remote UK freelancers.
Required Documents for EIN Application
Applying for an EIN as a non-resident requires specific documentation to prove the identity of the responsible party and the existence of the business. The primary form used is the IRS Form SS-4, Application for Employer Identification Number. While U.S. residents can often apply online, non-residents typically cannot use the online portal unless they have a U.S. SSN or ITIN. For non-residents, the application is usually submitted via fax or mail. You will need a passport of the responsible party applying for the EIN. If you are applying on behalf of a U.S. entity, such as a U.S. LLC you might have formed, you will also need the formation documents for that entity. If you are a sole proprietor without a U.S. entity, the passport of the individual responsible for the business is key. A crucial detail for non-residents is how to handle line 7b of Form SS-4, which asks for the SSN, ITIN, or 'Foreign' designation. Since most UK freelancers will not have a U.S. SSN or ITIN, writing 'Foreign' is the correct procedure. Ensure all information on the SS-4 accurately reflects your passport and any business formation documents.
The EIN Application Process for UK Residents
The process for obtaining an EIN as a UK resident differs significantly from that for U.S. residents due to the lack of a U.S. Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). U.S. residents can apply online and often receive their EIN within minutes. For non-residents without an SSN or ITIN, the application must be submitted by fax or mail. This method involves filling out IRS Form SS-4 and sending it to the appropriate IRS fax number or mailing address. The IRS processing time for non-resident applications submitted via fax or mail is considerably longer, typically taking 3–5 weeks. This longer timeline is a critical factor for Upwork freelancers who may need the EIN urgently for banking or payment purposes. Once the IRS processes the application, they will issue an EIN confirmation letter, often referred to as CP-575, which is mailed to the address provided on the SS-4. It's essential to track the fax confirmation or mailed documents carefully.
Common EIN Mistakes for UK Upwork Freelancers
UK Upwork freelancers encounter specific pitfalls when applying for an EIN, often related to their non-resident status and how they interact with U.S. tax forms. A common error is attempting to use the online application portal, which requires an SSN or ITIN. Since most UK freelancers do not possess these, they must use the fax or mail method. Failing to correctly fill out line 7b of Form SS-4, by not writing 'Foreign' when no SSN or ITIN is available, can lead to application rejection. Another mistake is providing a non-U.S. mailing address for the EIN confirmation letter if the IRS attempts to mail it, though often they will fax it back to non-residents. If you are forming a U.S. LLC, ensuring the entity type selected on the SS-4 matches your formation documents is vital. Lastly, misunderstanding the purpose of the EIN can lead to applying when it's not strictly necessary, or conversely, not applying when it is required for U.S. bank account opening or client payment compliance. Always confirm the specific requirements of the U.S. entity you are interacting with.
The Certified Acceptance Agent (CAA) Path
For non-residents seeking an EIN, the Certified Acceptance Agent (CAA) channel offers a significantly faster alternative to the standard fax or mail application. As a Certified Acceptance Agent, itin.net can act as an intermediary between you and the IRS for certain tax-related processes. When applying for an EIN through a CAA, the application is submitted electronically by the agent, which can expedite the process considerably. This means you can often receive your EIN in as little as 3–5 business days, a stark contrast to the 3–5 week wait for traditional non-resident applications. The CAA verifies your identity and the accuracy of the information on Form SS-4 before submitting it. This verification step helps reduce the likelihood of errors and rejections by the IRS. While this service comes at a cost, it provides a crucial time-saving benefit for Upwork freelancers in the United Kingdom who need their EIN promptly to open a U.S. bank account or meet client requirements. The itin.net EIN service leverages this CAA channel for faster processing.
Next Steps After Obtaining Your EIN
Once you have received your EIN confirmation from the IRS, you can proceed with establishing your U.S. business presence or fulfilling client requirements. The most immediate next step for many UK Upwork freelancers is opening a U.S. business bank account. With your EIN and passport, you can approach U.S. banks or fintech providers that cater to international clients. This account will allow you to receive payments more easily from your U.S. clients and manage your U.S. business finances separately. You may also need to update your payment information on the Upwork platform or with individual clients to reflect your new U.S. business details. Depending on your business structure and income, you might also need to consider U.S. tax filing obligations, such as Form 5472 if you have a U.S. LLC. Review the services offered by itin.net for assistance with the EIN process or other U.S. tax compliance needs. For those requiring an ITIN for personal U.S. tax filings, itin.net's ITIN application service is also available.
Practical tips
- Use the exact legal name of the responsible party as it appears on your passport for the EIN application.
- Clearly write 'Foreign' on line 7b of Form SS-4 if you do not have a U.S. SSN or ITIN.
- If forming a U.S. LLC, ensure the entity type on Form SS-4 precisely matches your state's formation documents.
- Allow ample time for processing; the 3–5 week wait for non-residents via fax is standard, so plan ahead for banking needs.
- Keep a copy of your submitted Form SS-4 and the IRS confirmation letter (CP-575) for your records.
Frequently asked questions
Can I use my UK National Insurance number on Form SS-4?
No, you cannot use your UK National Insurance number on Form SS-4. Line 7b specifically asks for a Social Security Number (SSN) or Individual Taxpayer Identification Number (ITIN). If you do not have either, you must write 'Foreign' in that field.
How long does it take to get an EIN as a UK resident?
For non-residents applying via fax or mail, the IRS typically takes 3–5 weeks to process an EIN application. Using a Certified Acceptance Agent (CAA) like itin.net can reduce this timeline to 3–5 business days.
Do I need to form a U.S. LLC to get an EIN?
No, you do not necessarily need to form a U.S. LLC. You can apply for an EIN as a sole proprietor if you are the responsible party, provided you meet the IRS criteria for non-resident applicants. However, many freelancers choose to form a U.S. LLC for liability protection and to simplify U.S. banking and tax compliance.
Can I open a U.S. bank account with just my passport and UK address?
Generally, no. Most U.S. banks require a U.S. EIN to open a business bank account, especially for non-residents. Some fintech banks may have slightly different requirements, but an EIN is very commonly needed.
What if my Upwork client needs my EIN for tax purposes?
If your Upwork client requires your EIN for their tax reporting (e.g., on a Form 1099 or similar), you will need to obtain one. Providing an EIN helps them comply with U.S. tax regulations and may prevent them from having to withhold U.S. income tax from your payments.
Do I need an ITIN to apply for an EIN?
You do not need an ITIN to apply for an EIN as a non-resident. If you do not have an ITIN or SSN, you should write 'Foreign' on line 7b of Form SS-4. An ITIN is for personal U.S. tax filing, while an EIN is for business tax identification.



