Let’s say you moved abroad and kept your Ukrainian ФОП (sole proprietorship) operating. Paperwork didn’t sort itself out miraculously. Then two tax offices sent you a bill for the same money. Double taxation is a real thing, and it’s what happens by default when two countries both have a claim on your fair share. Or maybe you earned some dividends from a company abroad? The same thing happens. The good news is, you can avoid it almost always.
What is double taxation?
Double taxationmeans the same income is taxed by two countries. It is what happens when two tax systems both have a legitimate claim and nothing has been done to separate them.
It happens in two ways:
- Two countries both consider you their resident. Let’s say you live in Warsaw but keep your Ukrainian registration, your flat, and your business. Poland claims you’re a resident because you’re there. While Ukraine says you’re a resident because your life is still anchored here. Both then tax your worldwide income. Not the part you earned in that specific country, all of it.
- Or one country taxes you as a resident, and another taxes the income at its source. You’re clearly a resident in Ukraine, but you own shares in a US company. The US taxes the dividend as it leaves because it originated there. Ukraine taxes it as it arrives, because you live here.
The second scenario is pretty common, and people sometimes misunderstand it, so here’s an example. A German company pays you a €1,000 dividend:
- Germany withholds 26.375% at source, so €736 reaches your account
- Ukraine then charges its own tax on the full €1,000
- Without a double taxation agreement, you pay both in full
Neither country applies the double taxation treaty automatically. You must fill out everything yourself.
Why it happens
Residency is what gives a country the right to tax your worldwide income, not just what you earned in that country. So if two countries both call you a resident, both want to tax everything.
Under the Tax Code, Ukraine determines you a tax resident based on:
- Place of residence in Ukraine. If you also have one abroad, it moves to the next test.
- Permanent home. If you have one in both countries, it moves on again.
- Centre of vital interests – where your closest personal and economic ties are.
- 183 days, but only if the centre of vital interests can’t be established, or you have no permanent home anywhere.
- Citizenship, as the final fallback, if nothing else clearly determines it.
What exactly is centre of vital interests? The Code names two conditions as sufficient, though not exclusive: where your family permanently lives and where you’re registered as a business entity. Registering as self-employed is, in itself, sufficient ground for being treated as a Ukrainian resident. There’s an explicit exception – e-resident status is not sufficient.
There are things that do NOT decide this:
- PESEL UKR and temporary protection are migration statuses. They let you live and work somewhere, but they say nothing about which country taxes you.
- Keeping your ФОП (sole proprietorship) registration open makes Ukraine treat you as a resident under domestic law, but it doesn’t settle the question under a tax treaty
Many Ukrainians end up in Poland. And this country considers you a tax resident if:
- Centre of personal or economic interests in Poland – family, home, social life, or workplace, main income source, business, bank accounts, assets
- More than 183 days in Poland during the calendar year – days don’t have to be consecutive, and both arrival and departure days count
Keeping your ФОП registration open makes Ukraine treat you as a resident under domestic law, but it doesn’t settle the question under a tax treaty. It also doesn’t smooth anything on the banking side – we’ve covered transferring money from Ukraine separately.
When both countries claim your income
When two countries each say you’re their resident and have to pay your fair share, the convention overrides both domestic laws and applies its own ordered test. Here’s the sequence it uses to determine your tax residency:
- Permanent home. Which country do you have a permanent home in? If only one, that is the answer.
- Centre of vital interests. If you have a permanent home in two different countries, it goes to the one where your personal and economic ties are stronger.
- Habitual abode. If the centre can’t be established, it goes to where you actually spend your time physically.
- Nationality. If that doesn’t settle it either.
- Mutual agreement. If you’re a national of both or neither, the two tax authorities negotiate it between themselves.
This list kind of runs “in the background” step by step, and you don’t have to decide anything here. The law decides where you have to pay taxes, and you do that. There are two related things to keep in mind:
- Conventions outrank domestic law. Here’s a simple example. Ukraine’s Tax Code may say you’re a resident, and Poland’s PIT Act may say the same. But if the convention test says you’re a tax resident of Poland, that’s where you actually pay your taxes. Even if it contradicts domestic rules in Ukraine, international conventions still override them.
- If the sequence from above reaches step five, you’ll have to be patient. At that point, the two tax offices sort it out between themselves through a formal process. It works, but it usually takes a lot of time – two years or more.
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How conventions solve it
A convention between two countries does two things:
- It decides which country gets to tax a particular type of income.
- Then it sets out how to remove the double charge if both still have a claim.
There are two standard mechanisms:
- Exemption. One country simply doesn’t tax the income because the other one already did.
- Credit. Both countries tax it, but you subtract what you paid abroad from what you owe at home. This is the one Ukraine mostly uses.
The credit system is the most common overall, but it has a ceiling: it can’t exceed the tax due in Ukraine. If you paid more in another country than you would have in Ukraine, the excess isn’t refunded. It’s just lost money, and you can’t use it.
As said before, international conventions have more authority than domestic laws. If the Tax Code and the convention contradict each other in some way, the convention wins. That’s the whole reason it exists.
Ukraine has signed over 70 agreements with countries around the world. The full list is published by the Ministry of Finance, and it changes. For example, the convention with Japan came into effect on 1 January 2026. Worth checking your specific country rather than assuming, because rates and terms differ from treaty to treaty.
There’s also one thing that works in your favor: if the source country withheld more than the convention allows, the difference is refundable – but by that country, not by Ukraine. You claim it there, and it’s not automatic. The fastest way is to get a legal consultation to see if you can get a refund.
What conventions don’t cover
Conventions don’t cover everything. In Ukraine, its provisions apply to exactly two taxes: corporate income tax and personal income tax. Everything else falls outside.
Next important thing – the military levy, and it’s not covered. The reason is that it isn’t formally a tax at all, which is exactly why conventions don’t work there. It stays payable in Ukraine even when your foreign tax is fully credited against your PIT.
The ФОП (solitary proprietorship) single tax is the expensive one. In Ukraine, a sole proprietor pays the single tax instead of income tax, not in addition to it. It’s a good deal if you stay in Ukraine, but it becomes a problem if you’re abroad. Here’s why:
- You have no Ukrainian PIT on that income, so there’s nothing for the convention to relieve
- The single tax itself isn’t a PIT, so your country of residence won’t credit it either
The result is actual double taxation, which you can’t relieve. You pay the single tax in Ukraine and the full income tax where you live.
And that’s not all – if the tax office concludes you should have been on the general system, it can reclassify you retroactively – 18% PIT plus 5% military levy across the whole period. In 2026, this is more likely than it was, because the ДПС (Ukraine’s tax authority) now receives data from foreign tax authorities.
If you control a foreign company, your country of residence can tax its undistributed profits, and the convention doesn’t cancel it.
The documents you’ll need
The certificate you send abroad is proof that you’re a Ukrainian resident. This is what you show a foreign tax authority, so it applies the treaty rate instead of its full domestic rate. The ДПС (Ukraine’s tax authority) issues it – the довідка-підтвердження статусу податкового резидента України (certificate confirming Ukrainian tax residency).
Here’s how you get it:
- Apply in person, by post, or through the Електронний кабінет (the ДПС online portal) at cabinet.tax.gov.ua
- Use the form from the Ministry of Finance order, and state which country it’s for
- It’s issued within 10 calendar days of your application
- There’s no fixed expiry date on it
If the foreign country requires it to be apostilled, only the ДПС (Ukraine’s tax authority) central office in Kyiv can help you with this. It costs 51 UAH (roughly $1) in 2026 and takes up to 20 working days.
And the certificate you bring home is proof of payment made abroad. This is what Ukraine’s tax authority needs before crediting anything. It has to come from the foreign tax authority, not your bank or broker, and it has to show the amount of tax paid and what it was charged on.
That document then needs legalising in the country that issued it – usually an apostille – plus a notarised Ukrainian translation. A few countries are exempt under bilateral agreements, including Moldova, Uzbekistan, Georgia, and Hungary, where the translation alone is enough.
If you’re an EU tax resident
Most EU countries tax residents on worldwide income, meaning they tax everything you earn anywhere, not just what you earn there.
Here’s a simple example to help you understand: you’re a Ukrainian ФОП (sole proprietorship) on the 5% single tax. You’ve lived in Warsaw since 2023, your family is with you, and you serve clients across several countries. Here’s what happens:
- Poland says you’re a resident. You’ve been there well over 183 days, and your centre of personal interests is there. Either of those is enough to prove you’re a resident of Poland.
- Ukraine also says you’re resident, because your ФОП (sole proprietorship) registration establishes a centre of vital interests there.
- The convention solves this riddle, and it points to Poland, because you have a permanent home, family, and habitual there.
- So Poland taxes your worldwide income at 12% up to PLN 120,000 and 32% above that, or at a flat 19% if you register a business locally and opt for it.
But you’ve also been paying 5% single tax in Ukraine the whole time. Can you subtract it from the Polish bill? Unfortunately, you can’t. The single tax isn’t an income tax under the convention, so Poland won’t credit it. You pay the 5% in Ukraine and the full Polish tax on the same income.
Does this situation look similar to yours? If so, keep in mind:
- Establish which country actually has the right to tax you. Not which one you’d prefer. The above-mentioned sequence gives one answer, and both tax offices will apply it in the same way.
- Get the residency certificate from whichever country wins. It’s what stops the other one from taxing you as a resident, too.
- Watch both calendars. Be sure to keep an eye on deadlines in both countries where you pay taxes, if applicable. For example, Poland’s filing deadline is 30 April, and Ukraine’s is 1 May.
If both countries can’t quickly decide who has the right to tax you, the mutual agreement procedure exists, so the two tax offices resolve it between themselves for you. It works, but it takes a lot of time – expect roughly two years. We’ve written separately about how to structure working with assets abroad without running into blocks.
Frequently Asked Questions
What is double taxation, in simple terms?
How do you get a Ukrainian tax residency certificate?
Does 183 days determine my tax residency?
Can a ФОП keep working while living abroad?
Should I close my ФОП if I've moved abroad?
Does temporary protection make me a tax resident?
Is there a convention between Ukraine and Poland?
Are dividends subject to double taxation?
Key numbers and terms
Key numbers
- 183 days – the day count in the residency test, though it’s the fourth criterion, not the first
- 5 – steps in the convention’s tie-breaker sequence, ending in agreement between the two tax offices
- 70+ – conventions Ukraine has signed with other countries
- 2 – the number of Ukrainian taxes conventions actually cover: corporate income tax and personal income tax
- 5% – the Ukrainian military levy, payable regardless of any convention
- 5% – the ФОП single tax rate in the example, creditable nowhere
- 18% + 5% – what a retroactive move to the general system costs, across the whole period
- 26.375% – German withholding on dividends (25% plus the solidarity surcharge)
- 10 calendar days – to receive a Ukrainian tax residency certificate
- 20 working days – to have that certificate apostilled
- 51 UAH (about $1) – the apostille fee in 2026
- 12% / 32% – Polish personal income tax, split at PLN 120,000
- 19% – the flat-rate option for business income in Poland
- 30 April – Poland’s filing deadline
- 1 May – Ukraine’s filing deadline
- ~2 years – how long the mutual agreement procedure typically takes
- 1 January 2026 – when the Ukraine-Japan convention took effect
Key terms
- Double taxation – the same income taxed by two countries
- Tax residency – the status that gives a country the right to tax your worldwide income
- Centre of vital interests – where your closest personal and economic ties are; family residence and business registration both count
- Tie-breaker rules – the convention’s ordered test for deciding residency when two countries both claim you
- Convention (double taxation treaty) – the bilateral agreement that decides which country taxes what, and how the double charge is removed
- Credit method – subtracting foreign tax from what you owe at home, capped at the domestic amount
- Exemption method – one country simply not taxing income the other already taxed
- Withholding at source – tax deducted in the paying country before the money reaches you
- Certificate Confirming Tax Resident Status – the State Tax Service certificate proving that you are a Ukrainian tax resident
- Apostille – the certification that makes a document valid in another country
- Mutual agreement procedure – the process where two tax authorities settle a residency deadlock between themselves
- ФОП (sole proprietorship) – the Ukrainian self-employment status; its single tax isn’t covered by conventions
- Single tax – what a ФОП pays instead of income tax, and what no foreign country will credit
- Military levy – the 5% Ukrainian charge that isn’t formally a tax, and therefore isn’t covered by conventions
- PESEL UKR / temporary protection – migration statuses that say nothing about tax residency
- Controlled foreign company – a foreign company you control, whose undistributed profit your country of residence can tax
Sources
Ukrainian tax authority and legislation
ДПС – Ukraine’s international double taxation agreements: https://tax.gov.ua/diyalnist-/mijnarodne-/mijnarodni-dogovori-ukraini-pro-uniknennya-podviynogo-opodatkuvannya/
Ministry of Finance of Ukraine – full list of double taxation conventions: https://mof.gov.ua/uk/international_agreements_of_ukraine_on_avoidance_double_taxation-543
ГУ ДПС у Запорізькій області – the tax residency test under пп. 14.1.213 ПКУ: https://zp.tax.gov.ua/media-ark/news-ark/917357.html
ДПС – obtaining and apostilling the tax residency certificate: https://tax.gov.ua/media-tsentr/novini/979915.html
ГУ ДПС у Донецькій області – legalisation of foreign tax certificates: https://dn.tax.gov.ua/media-ark/local-news/print-816404.html
ГУ ДПС у Херсонській області, via Дебет-Кредит – conventions don’t extend to the military levy: https://news.dtkt.ua/taxation/pdfo/103660-v-iakix-vipadkax-doxodi-fizosobi-nerezidenta-ne-pidliagaiut-opodatkuvanniu
Дебет-Кредит, citing ДПС – how to obtain the tax residency certificate: https://news.dtkt.ua/taxation/common/89654-iak-otrimati-dovidku-pidtverdzennia-statusu-podatkovogo-rezidenta-ukrayini-roziasnennia-vid-dps
Ukrainian analysis and guides
Uteka – applying international double taxation conventions: https://uteka.ua/ua/publication/commerce-12-nalogi-i-otchetnost-10-kak-primenyat-mezhdunarodnye-dogovory-konvencii-ob-izbezhanii-dvojnogo-nalogooblozheniya
MasterBuh – how a ФОП can avoid double taxation: https://masterbuh.com/06_03_18_yak_fopu_uniknuti_podvijnogo_opodatkuvannya
ОблікПро – tax residency for a ФОП living abroad in 2026: https://www.oblikpro.com/post/podatkove-rezydentstvo-fop-za-kordonom-u-2026
WoBorders – how double taxation works: https://woborders.agency/blog/yak-praczyuye-podvijne-opodatkuvannya/
IG Buh – declaring foreign income and crediting foreign tax: https://igbuh.com.ua/deklaruvannya-inozemnykh-dokhodiv/
FactorAcademy – obtaining the Ukrainian tax residency certificate: https://factor.academy/blog/dovidka-pidtverdzhennya-statusu-podatkovogo-rezidenta-ukrayini-yak-otrimati/
Lawyer Catalog – Ukrainians in Poland: an open ФОП or a flat in Ukraine, which country’s tax resident are you: https://www.lawyer-catalog.com.ua/post/українець-у-польщі-незакритий-фоп-або-квартира-в-україні-податковий-резидент-якої-країни-як-не
Бухплатформа – military levy in 2026: rate, base, who pays: https://buhplatforma.com.ua/article/7401-viyskoviy-zbir
Poland and other jurisdictions
PolishTax – Polish tax residency criteria: https://polishtax.com/information/polish-tax-residency/
MDDP – tax residence and personal income tax settlements in Poland: https://www.mddp.pl/tax-residence-and-personal-income-tax-settlements/
PwC Tax Summaries – Poland, taxes on personal income: https://taxsummaries.pwc.com/poland/individual/taxes-on-personal-income
Rezydencja Podatkowa – change of tax residency during a tax year and split residency: https://rezydencja-podatkowa-malta.pl/en/change-of-tax-residency-during-a-tax-year-split-tax-residency/
TaxReclaim.eu – Germany dividend withholding tax guide: https://taxreclaim.eu/tax-guide/germany
Polish Ministry of Finance – personal income tax rates: https://podatki-arch.mf.gov.pl/en/residents/personal-income-tax-rates/
This article is for general informational purposes only. It is not tax, legal, or financial advice, and it does not replace consultation with a qualified professional familiar with your situation.
Tax residency is decided case by case and depends on the full picture: where your home, family and business are, and how much time you actually spend in each country. Two situations that look similar at first glance can have different answers.
Tax rates, treaty terms and documentation requirements change, and the tax authorities of different countries can interpret the same rules differently. Everything described here is current as of publication and should be checked against the current positions of the ДПС (Ukraine’s tax authority) and the tax authority of your country of residence. Before acting, consult a qualified professional who can assess your circumstances.
