Fill out W-7 (ITIN application) online — free
Form W-7 is the IRS application for an Individual Taxpayer Identification Number — a 9-digit tax-processing ID issued to people who need to file US taxes but aren't eligible for a Social Security Number. Spouses and dependents of non-resident aliens, foreign investors, and certain visa holders all use W-7. AttachKit drafts the biographic block (name, DOB, country, foreign address) so the manual work narrows to the reason-for-applying checkbox.
Who needs it: Non-resident aliens filing US tax returns, US tax-treaty beneficiaries, dependents/spouses of US citizens or resident aliens, foreign investors with US-source income, and certain visa holders ineligible for an SSN.
Need a blank W-7? Download from the source, then drop it in below.
Why fill it here
- Draft name (Romanized + native), DOB, country of citizenship, foreign address, US address (if any), phone, and treaty country/article from your profile.
- Manual selection for the reason-for-applying checkbox — the IRS rejects W-7 if multiple boxes are checked, so AttachKit deliberately leaves this for you.
- Free to fill unlimited forms (15 signed PDFs/mo on the free tier).
Fill your W-7 now
W-7 questions, answered
General information, not legal or tax advice
This page is general information about a commonly-used tax form. Tax law is complex and fact-specific — for advice on your return, consult a CPA, enrolled agent, or tax attorney. AttachKit fills the PDF; the IRS holds you responsible for what's on it.
- Do I file W-7 with my tax return?
- Usually yes — W-7 is normally attached to the Form 1040 it'll be used for, mailed together to the ITIN Operations address in Austin, Texas. There are limited exceptions (treaty claims, third-party-withholding refunds) where W-7 stands alone.
- What proof of identity do I send?
- Original or IRS-certified copy of a passport (sole document that satisfies both identity and foreign-status) OR two other documents from the IRS-approved list (national ID, US visa, USCIS photo ID, etc.). Submitting originals via certified mail is standard; IRS returns them within 60 days.
- How long until my ITIN arrives?
- IRS processing varies seasonally — usually 7 weeks, up to 11 weeks during peak filing season. Plan filing accordingly if you have a refund tied to the ITIN.
- ITIN vs. SSN — does it matter?
- Yes. ITIN holders can't claim the EITC or some other credits SSN holders can. ITIN does NOT grant work authorization. It's strictly for tax-processing identity.