Certification of US tax residency
Form 6166 is a computer-generated letter that certifies US tax residency and unlocks reduced foreign withholding on dividends. A new one is needed for each year you claim.
Investment country
Reclaim over-withheld US dividend tax and apply the correct treaty rate at source.
What you can do
Recover Irish dividend withholding and encashment tax.
What you can do
Recover Swiss dividend withholding tax as a nonresident investor.
What you can do
Recover Norwegian dividend withholding tax as a nonresident investor.
What you can do
Resources
Guides, webinars and stories that make US nonresident tax make sense — in plain language.
What you can do
Have the treaty rate applied when the dividend is paid, instead of reclaiming the difference afterwards.
What you can do
The U.S. withholds 30% on dividends to nonresidents. Treaty rates cut that, and the difference is reclaimable.
What you can do
The document that proves your tax residency — and the one thing standing between you and the treaty rate.
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Appoint Sprintax as your tax agent and hand over the whole withholding and reclaim process.
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Get help with the Sprintax product you use — answers, guides and a route to our team.
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Reach the right team, whether you’re filing yourself or evaluating Sprintax for your organisation.
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certificate of residence
A Certificate of Residence (COR) is the foundation of accurate dividend withholding tax treatment. Sprintax Dividends helps to validate and manage CORs for investors, keeping the relief at source and reclaim processes moving smoothly.
A Certificate of Residence (COR) is the evidence a paying agent or custodian needs to apply a reduced treaty rate of withholding tax on behalf of a nonresident investor. Without a valid COR on file, there’s generally no basis to apply anything other than the statutory rate.
Alongside any other required documentation (such as a beneficial ownership declaration) a valid COR supports either a relief-at-source application or a later reclaim. Sprintax Dividends offers a full suite of DWT relief and recovery solutions, including support with COR preparation.
Without a valid Certificate of Residence on file, a custodian or paying agent generally has no basis to apply anything other than the full statutory withholding tax rate. With a COR in place, alongside any other required documentation, you can support either a relief-at-source application or a later reclaim.
$700 you receive
30% withheld
Full statutory rate applies by default.
$850 you receive
15% withheld +$150
Treaty rate applied at source, or reclaimed later.
Illustrative example on a $1,000 gross dividend. Rates vary by treaty.
There’s no single global standard for a Certificate of Residence.
The name of the document, how you apply for it, how long it remains valid and how long it takes to issue, all differ significantly depending on which tax authority you’re dealing with.
Form 6166 is a computer-generated letter that certifies US tax residency and unlocks reduced foreign withholding on dividends. A new one is needed for each year you claim.
A certificate of tax residency is obtained through the appropriate V2 form: V2A for individuals, V2B for companies, V2C for other entities.
A certificate of residence (CoR) is required to prove tax residency in the UK to an overseas tax authority or payer before treaty relief is applied.
In the Netherlands the relevant document is the woonplaatsverklaring, or declaration of residence, issued by the Belastingdienst — the Dutch tax office.
The Austrian certificate of residence is called an Ansässigkeitsbescheinigung, officially referenced as form ZS-A. It confirms Austrian tax residency to a foreign tax authority so you can claim treaty relief on withholding tax.
Italian investors need a certificato di residenza fiscale to reclaim DWT from abroad. It is generally issued within roughly 30 to 60 days of application.
The Spanish equivalent is the certificado de residencia fiscal. It proves Spanish tax residency to a foreign tax authority so you can claim treaty relief, and is typically issued within a few weeks of application.
The Norwegian certificate of residence confirms Norwegian tax residency to a foreign authority so you can claim treaty relief on dividend income. It typically takes four to six weeks to issue.
In Switzerland the certificate is an Ansässigkeitsbescheinigung or Wohnsitzbescheinigung in German, an attestation de résidence in French. You need it when claiming tax relief on overseas dividend income.
The route differs by country, but the shape of the process is the same everywhere.
The investor begins the process by requesting a certificate from the tax authority in their country of residence.
The tax authority checks the request against the investor’s tax-filing history to verify their tax status.
Once satisfied with the verification of the investor’s residency status, the tax office issues the COR to the investor.
The investor includes their COR with the application for relief at source, or for a dividend withholding tax refund.
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Find out how Sprintax Dividends can help you prepare and submit your Certificate of Residence applications, wherever they're needed.
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