Step-by-step guide for Singapore residents who need a U.S. ITIN for LLC formation, Amazon FBA, Stripe, PayPal, U.S. business banking, freelancing, and international online business.
An ITIN (Individual Taxpayer Identification Number) is a 9-digit US tax number issued by the IRS for individuals who need to meet US tax obligations but do not have a Social Security Number — including Singapore non-residents.
Created for non-residents — including Singapore citizens — with US tax filing obligations.
An official federal tax ID number from the US Internal Revenue Service.
Allows you to file taxes and operate a business; does not authorise work in the US.
A personal tax ID for foreign individuals (you as a person). Singapore residents use it to file US taxes, verify Stripe/PayPal, and open US bank accounts.
A business tax ID for your US LLC. Think of it as the US equivalent of a Singapore company tax number for your American company.
Most Singapore entrepreneurs operating in the US need both an ITIN (personal) and an EIN (business) for full compliance.
From Marina Bay freelancers to Orchard Road Amazon sellers, Singapore business owners are expanding into the US market with an ITIN-powered setup.
Singapore entrepreneurs selling on Amazon.com who need US tax compliance for seller verification and payouts.
Singapore founders accepting international payments who need tax ID verification for US business accounts.
Singapore residents who own a Wyoming, Delaware, or New Mexico LLC and must file US taxes with the IRS.
Singapore e-commerce operators with US customers who need proper tax documentation.
Singapore professionals invoicing US clients via Upwork, Fiverr, and international platforms.
Singapore marketing, design, and development agencies serving American clients.
Singapore coaches and consultants selling digital products and courses to US audiences.
Singapore tech founders building US-facing SaaS products needing US payment processing.
A US ITIN opens the door to the American financial system for Singapore entrepreneurs looking to scale globally.
Access Mercury, Relay, and Wise Business as a non-resident from Singapore.
File taxes correctly with the IRS and avoid penalties or account suspensions.
Receive and send USD via Stripe, PayPal, and Wise without friction.
Build US financial history and operate your business with a professional US tax identity.
The three most popular platforms used by Singapore entrepreneurs in the US require (or strongly recommend) an ITIN for tax verification.
Accept international card payments in USD. An ITIN helps verify your account as a foreign beneficiary and comply with W-8BEN requirements.
Receive payments from global clients. With ITIN + LLC + EIN, Singapore residents can operate verified US PayPal Business accounts.
Sell on Amazon.com as a Singapore-based seller. The ITIN is a key part of the tax verification process to receive payouts correctly.
Most Singapore entrepreneurs operating in the US have a US LLC + EIN + ITIN. The LLC is your American company, the EIN is its business tax ID, and the ITIN is your personal US tax number as a Singapore resident. Together, they unlock Stripe, PayPal, digital banks (Mercury, Relay), and Amazon FBA.
The documentation for Singapore residents is straightforward and everything can be handled remotely through a Certified Acceptance Agent (CAA).
Primary identity document. A Certified Acceptance Agent (CAA) can verify it remotely without sending the original to the IRS.
The official ITIN application completed with accurate personal details, reason for application, and correct category selection.
Documentation showing why you need an ITIN — such as US LLC documents, Amazon seller contract, Stripe business agreement, or tax treaty benefits.
Your residential or business address in Singapore (or abroad) where the IRS will mail your ITIN assignment letter.
A simple, 100% remote process through an IRS-authorised Certified Acceptance Agent — no need to leave Singapore.
Fill out the official IRS W-7 application with your personal details, reason for applying, and correct ITIN category.
An IRS Certified Acceptance Agent (CAA) authenticates your Singapore passport remotely — no need to mail it overseas.
Your CAA submits your application package with the Certificate of Accuracy directly to the IRS on your behalf.
The IRS reviews your application. Typical processing takes 6 to 10 weeks from receipt of a complete application.
The IRS issues your 9-digit ITIN and mails the assignment letter to your address in Singapore.
From Central Business District freelancers to Jurong East Amazon sellers, Singapore business owners are expanding into the US market with an ITIN-powered setup.
Singapore designers, developers, and marketers serving US clients use an ITIN to issue W-9 forms and get paid in USD through US platforms.
Singapore-based Amazon sellers access Amazon.com, handle US tax interviews, and receive payouts with an ITIN-verified account.
Accept card payments and send invoices globally with a verified US business account backed by ITIN + LLC + EIN.
Open accounts with Mercury, Relay, or Wise Business to hold and transact in USD without currency conversion losses.
Use your ITIN to open US brokerage accounts and invest in American stocks, ETFs, and securities.
Launch a Wyoming, Delaware, or New Mexico LLC remotely — no US address, no SSN, and no travel required.
We answer the most common questions from Singapore entrepreneurs about obtaining a US ITIN number.
Join thousands of Singapore entrepreneurs already operating global businesses in the United States with an ITIN processed 100% remotely from Singapore.
Processing approximately 6–10 weeks · Your passport never leaves your hands
US Biz Solutions is an informational and affiliate website. The information provided here is for educational purposes only and does not constitute legal, tax, accounting, or immigration advice. Please consult a qualified professional before making financial or tax decisions. Some links on this page are affiliate links and we may receive a commission at no additional cost to you.