If you’re living in the UK and earning money from U.S. sources — like Stripe, Amazon, Upwork, or U.S.-based clients — you may have already run into a frustrating roadblock: needing a U.S. tax number. This guide breaks down how to apply for an ITIN from the UK (UK ITIN) without getting lost in IRS paperwork or waiting months for a reply. We simplify this and handle the process end. to end.
To apply effectively, it’s important to understand the requirements.
The process used to be complex, but in 2025, it’s more streamlined than ever — if you follow the right steps.
What is an ITIN number?
An ITIN (Individual Taxpayer Identification Number) is issued by the IRS to non-U.S. residents who need to report income and file U.S. tax returns. If you’re not eligible for a U.S. Social Security Number but still need to comply with U.S. tax rules, this is what you’ll need.
It’s commonly required for UK-based:
- Freelancers and consultants getting paid by U.S. clients
- Building US Credit
- E-commerce sellers on U.S. platforms
- Investors receiving U.S.-sourced income
Why You Need an ITIN from the UK (ITIN UK)
Many UK residents working internationally don’t realise their earnings could be subject to U.S. tax withholding. Without an ITIN, platforms like Amazon or Stripe may withhold 30% of your earnings, even if you live outside the U.S. An ITIN helps you:
- Reduce or eliminate withholding tax
- File a U.S. tax return if required
- Stay compliant with platforms like PayPal, Upwork, and more
- Access U.S. financial systems (in some cases)
Documents You’ll Need to Apply (We help you with this)
- A certified copy of your passport
- A filled W-7 form (IRS application for ITIN)
- A supporting document that proves a U.S. tax purpose
(This could be a Stripe letter, 1042-S form, or royalty agreement)
Mistakes in documentation are the #1 cause of ITIN rejections, especially when applicants send scanned or uncertified passport copies.
7 Smart Steps on How to Apply for an ITIN from the UK (ITIN UK)
- Confirm your U.S. tax connection — make sure you have a legitimate reason to apply
- Get your documents ready — passport certification is key
- Fill in IRS Form W-7 — be accurate, and match passport details exactly
- Work with a Certified Acceptance Agent (CAA) — this allows for identity verification
- Submit your application — your CAA handles mailing everything to the IRS (Other UK Notaries do not offer this – WE DO!)
- Track the process — average wait is 6–10 weeks
- Receive your ITIN — the IRS sends it via mail
Knowing how to apply for an ITIN from the UK the right way prevents delays, rejection, and resubmission. Ensure you have all necessary documents to apply.
How Fast ITIN Simplifies the Whole Process
At Fast ITIN, we specialise in helping UK-based clients get their ITINS (ITIN UK) quickly, without ever mailing their original passports.
Here’s what you get:
- IRS-compliant application handling
- Certified ID verification is done by an authorised CAA
- No confusing paperwork
- Updates are sent directly through WhatsApp and Email
- One flat fee — no hidden costs
We’ve helped hundreds of UK applicants succeed on the first try. Our process is built for simplicity and speed.
FAQ: ITIN Application from the UK (ITIN UK)
Is it safe to apply from the UK without visiting the U.S.?
Yes. You are verified through official CAA channels.
How long does it take?
Most applicants receive their ITIN in 6–10 weeks.
Can I use my ITIN for Stripe and Amazon?
Absolutely — that’s one of the main reasons UK clients apply. (ITIN UK)
What if my application was rejected in the past?
We can review, correct, and resubmit on your behalf.
Start Now — Don’t Let U.S. Tax Rules Hold Up Your Money
Getting your ITIN doesn’t have to be hard; you don’t need to figure it out alone. We’ve removed the stress, simplified the steps, and built a support system that works from day one.
Start Your ITIN Application Now
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