Reviewed & Updated September 2026
EIN for Hong Kong LLC Owners: Complete 2026 Application Guide
Getting your US federal tax ID, and why Hong Kong's territorial system keeps your LLC's foreign income out of its tax net
Quick Summary
- Country
- Hong Kong
Applying by phone from Hong Kong
Call the IRS International EIN line at 267-941-1099, open 6am-11pm US Eastern Time. Calling from Hong Kong works without issue — this line exists specifically for foreign applicants without a US SSN or ITIN. Budget 45-60 minutes for the full call including hold time. You'll confirm your entity's legal name, formation state and date, a short business description, and your name and Hong Kong address as the responsible party, receiving your EIN verbally before hanging up. Given the roughly 12-13 hour time difference, calling right as the line opens (early evening Hong Kong time) tends to mean shorter waits.
Fax and mail as slower alternatives
Fax reaches 855-215-1627 (from the US) or 304-707-9471 (from outside); mail routes through the Cincinnati service center. Both now run roughly 4-6 weeks. The phone route saves a month or more compared to either.
What this means for your specific situation
If you're a Hong Kong resident and your US LLC earns income from clients or customers outside Hong Kong, that income generally stays outside Hong Kong's tax system entirely, since Hong Kong doesn't tax foreign-sourced income of individuals under any circumstance. The main thing to watch is whether any part of your business activity could be construed as carried on in Hong Kong itself — determining source can get genuinely fact-specific, and it's worth a quick confirmation with a Hong Kong tax advisor if your work involves any local Hong Kong clients or operations.
Keeping your CP 575 confirmation letter safe
A CP 575 letter arrives by mail a few weeks after your call. If lost, the IRS won't reissue the original, but calling the same EIN line gets you a 147C verification letter that serves the identical purpose.
Getting your business fully set up after the EIN
With your EIN confirmed, open a US business bank account, connect your payment processor, and calendar your Form 5472/1120 deadline right away. Since Hong Kong's own tax exposure on this income is minimal, most of your ongoing compliance attention will sit on the US filing side rather than the Hong Kong side.
Line 7b: what to write instead of an HKID number
Form SS-4's Line 7b asks for the responsible party's SSN, ITIN, or EIN. As a Hong Kong applicant, you write "Foreign" or "N/A" — the standard, expected entry that doesn't delay your application.
The EIN as the practical first step for your LLC
A US LLC's formation certificate proves it legally exists, but an EIN — the nine-digit federal tax ID the IRS assigns to the entity — is what makes it operational. Without one, no US bank will open an account, no payment processor will verify it, and no annual return can be filed. This is unrelated to your Hong Kong Identity Card number — the EIN identifies the business, not you.
The 2023-2024 FSIE regime doesn't change this for you personally
Hong Kong introduced a Foreign-Sourced Income Exemption (FSIE) regime, effective January 2023 and expanded January 2024, which can bring certain foreign passive income (like dividends, interest, and disposal gains) received in Hong Kong by an entity within scope of profits tax. This targets multinational-group entities operating in Hong Kong, not individuals personally receiving foreign income — so it doesn't change the basic picture for a Hong Kong resident who personally owns a US LLC rather than routing income through a Hong Kong company.
Hong Kong's territorial system: one of the cleanest in this guide
Hong Kong taxes individuals purely on Hong Kong-sourced income. There's no comprehensive personal income tax at all — instead, three separate taxes (salaries tax, profits tax, property tax) each apply only to income arising in or derived from Hong Kong. Foreign-sourced income — including profits from a US LLC serving clients outside Hong Kong — falls entirely outside this system, regardless of your residency status or nationality.
The $25,000 US filing requirement that exists regardless of Hong Kong's territorial exemption
Even though Hong Kong doesn't tax your LLC's foreign-source income, US rules still require an annual Form 5472 alongside a pro forma Form 1120 for any foreign-owned single-member LLC, generally due April 15 (or October 15 with an extension). Missing this filing triggers a minimum $25,000 penalty regardless of profitability — this is a US disclosure requirement entirely independent of Hong Kong's tax treatment.
Requirements
| Requirement | Needed |
|---|---|
| US Social Security Number | |
| ITIN | |
| LLC formation documents | |
| Responsible party's Hong Kong address | |
| US registered agent address |
Costs
| Item | Cost |
|---|---|
| EIN Priority (bundled with Global Launch formation) | $99 |
| EIN Follow-up (LLC already formed) | $129 |
| DIY phone application | $0 (your time only) |
Who Should Choose
DIY phone application
Free, and manageable with a 45-60 minute international call timed around the time difference.
EasyBrise EIN Follow-up ($129)
For founders whose LLC is already formed and want the IRS call handled for them.
EasyBrise EIN Priority ($99, bundled)
For founders forming their LLC now who want the EIN done in the same workflow.
Comparison
| Method | Who Can Use It | Typical Time |
|---|---|---|
| Phone (267-941-1099) | Any foreign responsible party | 45-60 minutes |
| Fax | Foreign or US applicants | 4-6 weeks |
| Foreign or US applicants | 4-6 weeks | |
| Online IRS tool | US-based SSN/ITIN holders only | Not available to most Hong Kong founders |
Banking
Mercury
Popular with non-resident founders; requires US LLC + EIN; no US visit needed
Relay
Remote-friendly for non-residents; requires formed US entity
Frequently Asked Questions
More guides for founders in Hong Kong
Or browse all formation guides by country.
Reviewed by EasyBrise Research Team · Updated September 2026
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