Guide
How to Get IRS Form 6166 (Form 8802 Step by Step)
How to get IRS Form 6166, the U.S. tax residency certificate, by filing Form 8802 — who qualifies, choosing the tax year and countries, the user fee, timing, and common mistakes.
Quick answer
File IRS Form 8802, the Application for United States Residency Certification. Pay the user fee (currently $85 for individuals), name each country and tax year you need, and the IRS mails Form 6166 — commonly six weeks or more later. It’s year-specific, so request the year the foreign authority requires.
On this page
Who can get one
U.S. residents for federal tax purposes — individuals, businesses, partnerships, trusts and others — who filed the required return for the year being certified. The IRS certifies residency; it doesn’t certify income amounts.
Step by step
Confirm the tax year and countries
Foreign authorities usually want the current or most recent year. Form 8802 lets you name multiple countries and request several copies.
Complete Form 8802
Include the penalties-of-perjury statement and any treaty or purpose details the form asks for.
Pay the user fee
Currently $85 for individuals; business rates are higher. Check the IRS page for the current amount.
Submit and wait
Processing commonly takes six weeks or more. Plan around your filing deadline abroad.
Receive Form 6166
Keep the original clean — the apostille attaches to it.
Common mistakes
- Requesting the wrong tax year.
- Sending a tax transcript instead — they’re different documents (transcript guide).
- Filing too late: Form 8802 is slow, and the apostille comes after.
When you’ll need it abroad
- Claiming reduced withholding under a tax treaty
- Avoiding double taxation on foreign income
- VAT exemptions or refunds abroad
- Opening foreign bank accounts or registering a business
Troubleshooting
The IRS rejected Form 8802
Common causes: missing penalties-of-perjury statement, the required return not filed for that year, or incomplete entity details.
You need it for a year you haven't filed yet
Current-year certifications have specific rules — check the Form 8802 instructions for the current year.
You need several countries
List them all on one Form 8802 and request enough copies.
It arrived after your deadline
Ask the foreign payer whether proof of a pending application is accepted meanwhile.
Next: getting it apostilled
Once you have the document, it needs authentication before a foreign authority will accept it. See how to apostille it. Our price is $299 per document for Hague Convention countries and $399 for non-Hague countries including embassy legalization, with government fees included.
Frequently asked questions
How much does Form 8802 cost?
The user fee is currently $85 for individuals, with higher rates for other filers. Check the IRS page before filing.
How long does Form 6166 take?
Commonly six weeks or more after the IRS receives Form 8802.
Can I get Form 6166 for several countries?
Yes — Form 8802 lets you list multiple countries and request multiple copies.
Can a tax professional file Form 8802 for me?
Yes, with the appropriate authorization attached.
Does Form 6166 show my income?
No. It certifies U.S. tax residency, not income. For income, use a tax transcript.
Sources: U.S. Department of State — Authenticate Your Document · Hague Conference — Apostille Section · IRS Form 8802 & Form 6166. Federal Apostille USA is a private service, not a government agency.
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