Tax residency and worldwide income (Steueransässigkeit)

Level 3 · Advanced

German termSteueransässigkeit / Doppelbesteuerungsabkommen

German tax residency starts with domestic law: a Wohnsitz (residence) or gewöhnlicher Aufenthalt (habitual abode) normally creates unlimited German income-tax liability. Germany then generally considers worldwide income, while a Doppelbesteuerungsabkommen (double-tax treaty) may allocate taxing rights or require relief. The familiar 183-day rule is not a universal test of tax residence [1][2].

Why it matters

Moving country does not divide a tax year cleanly at the border. A retained home, remote work, investment income, a foreign rental, or equity compensation can connect the same person and income to two states.

The correct sequence is: determine liability under each country's domestic law, identify treaty residence if both claim residence, classify each income item under the applicable treaty, and then apply the relief method. Skipping directly to day counting can produce the wrong answer.

Germany's domestic tests

An Anmeldung (address registration) is useful evidence, but it is not the legal test by itself. Nor does deregistration automatically end a Wohnsitz if a usable German home is still retained under the relevant circumstances.

Test	Core question	Consequence in Germany
Wohnsitz (residence)	Is a dwelling held under circumstances showing that it will be kept and used?	It can create unlimited tax liability even without spending most of the year there [1]
Gewöhnlicher Aufenthalt (habitual abode)	Is the stay more than temporary? A continuous stay exceeding six months normally counts from the beginning, subject to statutory exceptions	It can create unlimited tax liability without a German home [1]
Neither test	Is there German-source income listed in § 49 EStG?	Limited tax liability may still apply to that German-source income [2]

Why 183 days is not the residence rule

The 183-day clause commonly found in tax treaties concerns the allocation of taxing rights over employment income earned while working in another state. It operates together with conditions about the employer and which establishment bears the remuneration. The clause does not replace Germany's Wohnsitz and habitual-abode tests [3].

For example, a worker spends 170 days abroad but keeps and uses an available home in Germany. “Under 183 days abroad” does not by itself answer residence or determine where all income is taxed. Domestic residence rules come first; the treaty then addresses residence and each income category.

Dual residence and treaty tie-breakers

Two states can both treat a person as resident under domestic law. A typical treaty then applies tie-breakers in sequence:

The wording of the treaty between the two specific countries controls. Treaty residence allocates treaty benefits and taxing rights; it does not necessarily erase the domestic-law status that existed before treaty relief [4].

Worked cross-border example

Mira moves from Germany to Country B on 1 September. She keeps a German apartment available, works remotely for a German employer, earns interest in Country B, and receives rent from a flat in a third country.

“Worldwide income” does not mean every item is taxed twice. German unlimited liability supplies the broad starting point. A treaty may assign an item to one state and require the other to exempt it or credit foreign tax. Some treaty-exempt income can still affect the German rate through the Progressionsvorbehalt (progression proviso) [4][5].

Layer	Question
Domestic status	Did Mira retain a German Wohnsitz, and does Country B also treat her as resident?
Treaty residence	If both do, which state wins the treaty tie-breaker for the relevant dates?
Income allocation	Where was employment physically exercised, where is the rental property, and what does the treaty say about interest?
Relief and filing	Does Germany exempt the item, grant a foreign-tax credit, or include exempt income when setting the rate on other income?

Records that support the analysis

Keep a dated housing timeline, travel calendar, work-location log, employment agreements, foreign tax certificates, rental records, and evidence of when homes became available or ceased to be available. These records support the facts; they do not substitute for applying the law.

Professional cross-border tax advice is proportionate for a move year, two available homes, remote work across borders, self-employment, company management, foreign pensions, stock compensation, trusts, or income in three or more countries. Each treaty differs.

Check yourself

A person spends 170 days abroad but retains an available home in Germany under circumstances showing it will be kept and used. Which statement is correct?

They cannot be German tax resident because they were abroad for fewer than 183 daysThe retained German home may create a Wohnsitz and unlimited German tax liabilityOnly the person's citizenship matters

What is the usual role of a treaty's 183-day clause?

It universally determines a person's tax residenceIt helps allocate taxing rights over employment income exercised in another stateIt exempts every type of foreign income after 183 days

Which two methods commonly provide relief from double taxation under a treaty? Select both.

Exemption of income allocated to the other stateCredit for qualifying foreign taxIgnoring all foreign income on the returnAutomatic reimbursement of every euro paid abroad

What is the correct first step when two countries may tax the same person?

Count only days spent in each countryDetermine tax liability under each country's domestic lawAssume the country paying the salary taxes everything

Why it matters​

Germany's domestic tests​

Why 183 days is not the residence rule​

Dual residence and treaty tie-breakers​

Worked cross-border example​

Records that support the analysis​

Check yourself​

Sources​