What a tax residency certificate is
A tax residency certificate is an official document, usually from a country's tax authority, stating that you were resident there for tax purposes during a given period. It is the official answer to a question every country settles under its own law, so whether you can get one depends on how tax residency works in the country you claim, not on your passport or your visa.
Names differ by country, which matters when a form or a payer asks for it by name: Form 6166 in the US (IRS, Form 6166), a certificate of residence in the UK, a Tax Residency Certificate in the UAE, a Certificado de Residencia Fiscal in Paraguay and a certificate of resident status in Hong Kong.
What it proves is narrow: that this country treated you as its tax resident for this period. It does not show that you paid any tax, it does not bind another country, and it says nothing about domicile, the separate idea of your permanent home country that some tax systems use alongside residence.
Why banks, payers and tax offices ask for a certificate
Most requests come from 3 situations:
- A treaty claim. A tax treaty can reduce the tax a foreign country withholds from income paid to you, but only for a resident of the other treaty country, so the payer or its tax office wants proof first. The IRS says Form 6166 serves both for treaty claims and as proof of US residence for a VAT exemption (IRS, Form 6166).
- Proof that you left. The country you left applies its own test, and a certificate from your new country is the first evidence that you now live elsewhere. Spain counts short trips abroad as days in Spain unless you prove tax residence in another country (LIRPF, article 9), which is why becoming non-resident for tax in a country like Spain usually ends with a certificate from the new one.
- A bank account. Under the Common Reporting Standard, a bank must collect a self-certification of your tax residence when you open an account (HMRC, IEIM403140). The form is your own statement, but when the country you declare does not match the address the bank holds, a certificate is the clearest evidence you can hand over.
As a digital nomad you can meet all 3 in the same year: clients in 1 country, a bank in another and a home base in a third can each ask where you are resident, and that answer also decides where a digital nomad pays tax.
A new certificate does not release you from the old country
A certificate says your new country treats you as resident. It does not make your old country let go: if you kept a home, a spouse and children or enough days there, it can still count you as resident under its own law. If the 2 countries have a tax treaty, its tie-breaker tests decide, starting with where you have a permanent home, and the certificate is only one piece of evidence in them. Without a treaty, both countries can treat you as resident.
Who can get a tax residency certificate
Only the country where you are resident issues one, through its tax authority or, in Monaco, the Residency Section of the Police Department (Mon Service Public), and only for a period in which you met its test. Many countries draw the line near the 183-day rule, but the certificate follows whatever the local law says:
- Hong Kong: you ordinarily reside there, or stayed more than 180 days in a year of assessment or more than 300 days over 2 consecutive years including it, and the IRD issues the certificate only to claim benefits under a double taxation agreement already in force (IRD), so it is no help with a bank or a country without a Hong Kong treaty.
- UAE: 183 days or more in 12 consecutive months; or 90 days or more with a residence permit plus a permanent home, a job or a business there; or your usual residence and your center of financial and personal interests in the UAE (Cabinet Decision No. 85 of 2022, article 4).
- Georgia: you are resident for a tax year with 183 days or more in any continuous 12-month period ending in that year (article 34(2)), or with high net worth individual status under article 34(6), which needs no day count (Tax Code, article 34). Either route gives you tax residency in Georgia.
- Monaco: a residence permit plus more than 183 days in Monaco, your principal place of business there, or the majority of the year spent there (Mon Service Public).
- Paraguay: the certificate rules set no day count; Law 125/1991 presumes that your tax domicile is your place of habitual residence, and presumes habitual residence after more than 120 days there (Law 125/1991, article 152).
2 limits follow. The UK and the UAE certify only a past or current period (GOV.UK, FTA), though the IRS processes a request for the coming calendar year from December 1 of the year before (Form 8802 instructions). And no residence means no certificate, the main practical cost of the perpetual traveler plan of staying resident nowhere, with 1 exception for Georgian citizens, covered below.
How to get a tax residency certificate in 6 countries
Tax residency certificates in 6 countries. Sources: each authority's own page, read October 12, 2026 and linked in the text.
| Country | Issuer and document | Who qualifies | How to apply | Time and period |
|---|---|---|---|---|
| United States | IRS, Form 6166 | US residents for federal income tax, unless you claimed the other country under a treaty, filed as a nonresident or skipped a required US return | Form 8802 by mail or fax, with the user fee | Mail at least 45 days before you need it; current-year requests from December 1 of the year before |
| United Kingdom | HMRC, certificate of residence | UK residents entitled to benefits under the treaty with the other country; without a treaty, a letter of confirmation instead | Online or by post, naming the treaty, country, type of income and period | Past or current periods only |
| UAE | Federal Tax Authority, Tax Residency Certificate | Residents under Cabinet Decision No. 85 of 2022 | EmaraTax, with Emirates ID or passport and an official entry and exit report | 10 business days; a tax period or a chosen 12 months, never a future one |
| Paraguay | DNIT, Certificado de Residencia Fiscal | Residents; registered taxpayers need a RUC and up-to-date filings | Request with your cedula and the migration movement record for the period | 10 business days; valid 1 year from issue |
| Hong Kong | Inland Revenue Department, certificate of resident status | Ordinarily resident, or more than 180 days in a year of assessment or more than 300 over 2; treaty claims only | Online through the IRD portals, by post or in person | Aim of 21 working days; 1 application covers up to 3 calendar years |
| Monaco | Police Department's Residency Section, residence certificate for tax purposes | Permit holders with more than 183 days, their main place of business or most of the year in Monaco | By email, at the Residency Section desk or by post | Valid 1 year |
United States: Form 8802 for a Form 6166
You send Form 8802 with the user fee by mail or fax, and the IRS asks you to mail it at least 45 days before the date you need the certificate; a request for the current year postmarked before December 1 of the year before comes back unprocessed (Form 8802 instructions). You can ask for the current year and any number of prior years on the same form.
UAE: an EmaraTax application
The Federal Tax Authority sorts applications by how you qualify. With 183 days or more, it wants an Emirates ID or a passport with an entry and exit report; with 90 to 182 days, both of those plus proof of a UAE job, business or permanent home (FTA, tax certificates). If you moved to the UAE, which has no personal income tax, this certificate is the proof of residence to hand your old tax office when it asks where you live now.
Paraguay: a DNIT request
The DNIT asks for a copy of your cedula, the migration movement record for the period and, if you are a registered taxpayer, a RUC with your filings up to date; it issues within 10 business days, and the certificate is valid for 1 year from issue (Resolución General 65/20). Because the record is the evidence, tax residency in Paraguay is only as strong as your entry and exit stamps for that year.
United Kingdom, Hong Kong and Monaco
HMRC asks for the treaty, the country, the type of income and the period; if you have not filed a return for that year, you also give your UK days, your arrival and departure dates and, below 183 days, why you are resident under the Statutory Residence Test (GOV.UK). Hong Kong charges no fee, aims to decide within 21 working days, and lets 1 application cover up to 3 calendar years of claims with the same treaty partner (IRD).
Monaco's Residency Section wants your passport, the request from the body asking for the certificate, your latest water, electricity or gas bill and proof of income, and the certificate it issues is valid for 1 year (Mon Service Public).
| Hong Kong | No fee |
|---|---|
| United KingdomHMRC's guidance names no charge | No fee listed |
| ParaguayResolución General 65/20 names no charge | No fee listed |
| United StatesPer Form 8802, since October 1, 2026 (it was $85) | $105 |
| UAE, individual with a corporate tax registrationAED 50 (about $14) to submit plus AED 500 (about $136) to issue | AED 550 (about $150) |
| UAE, individual without a corporate tax registrationAED 50 (about $14) to submit plus AED 1,000 (about $272) to issue; AED 250 (about $68) per printed copy; not refunded if rejected | AED 1,050 (about $286) |
| MonacoPaid at the Residency Section; valid 1 year | €600 (about $683) |
Fees from each authority's own page, read October 12, 2026: IRS, Form 6166, FTA, Mon Service Public, IRD, GOV.UK and DNIT.
How to prove tax residency: the documents to gather
To prove tax residency you show 3 things: who you are, where you spent the period and what ties you to the country. A certificate is the strongest proof because the authority itself vouches for it, and the same documents back you up when a bank or your old tax office asks for evidence directly. Gather them before you apply, because a rejected application can cost you the fee: the UAE's Federal Tax Authority does not refund it (FTA).
Before you apply for a tax residency certificate
- Your passport, plus the local ID where one exists (an Emirates ID in the UAE, a cedula in Paraguay).
- An official record of your entries and exits for the period: the UAE's entry and exit report, or Paraguay's migration movement record.
- Proof of a home or other tie: a lease, a recent utility bill, an employment contract or a business registration.
- Your local tax number and filed returns: Paraguay and the IRS both refuse a certificate while required filings are missing.
- The exact request: which treaty, which country, which type of income and which period.
- Time: in the US, at least 45 days before you need the certificate.
When you cannot get a tax residency certificate
- You are resident nowhere. No authority can certify you, except that Georgia deems a Georgian citizen whose residency cannot be established in any country resident on application (Tax Code, article 34(6¹)).
- You have not met the test yet. The UK and the UAE certify no future period; in the UAE an individual can apply as soon as the residency criteria are met (FTA).
- You claimed the other country or skipped a US return. The IRS will not certify a dual resident who used a treaty tie-breaker to be resident of the other country, anyone who filed a US return as a nonresident, or anyone who did not file a required US return for the period (Form 8802 instructions).
- The treaty does not cover you. HMRC issues a certificate only under a double taxation agreement; without one, or for another purpose, it issues a letter of confirmation of UK residence instead (GOV.UK).
- Your filings are behind. Paraguay's DNIT certifies registered taxpayers only when their filings are up to date.
How long a tax residency certificate is valid
A certificate covers a stated period, and some also expire: Paraguay's and Monaco's are valid for 1 year from issue. The UAE's covers the tax period or 12-month window you pick, and Hong Kong lets 1 application cover up to 3 calendar years with the same treaty partner.
Pick the period to match whoever asked: a payer applying a treaty wants the year the income is paid, while your old tax office wants the year it is asking about, which straddles 2 calendar years if it counts a 12-month window.
Choosing the period on a UAE certificate
Accepted
You moved to Dubai in March 2025 on a residence visa with an annual lease and spent 140 days in the UAE in the 12 months to February 2026. Your old tax office asks about that window, so you request those exact 12 months with the entry and exit report and the lease.
Rejected
In your first week in Dubai you apply for a certificate covering the next 12 months, to show a new bank. The FTA does not certify a future period and you have not met any of its tests yet, so the application fails and the fee is gone.
David's note
I would apply in the month you first meet your new country's test, before anyone asks, and again every year after that. A payer about to withhold at the full rate, or an old tax office with a reply deadline, will not wait the 10 business days the UAE takes, let alone the 45 days the IRS asks for.
