Germany is unusually easy to become tax resident in by accident, because the trigger is not only a day count. Keep a furnished flat at your disposal - even one you rarely visit - and you can be a German tax resident with barely any days in the country. Stay continuously for more than six months, even across New Year, and you are resident too, backdated to the day you arrived. Here is how German tax residency really works in 2026: the Wohnsitz dwelling trap, the habitual-abode clock, and how to keep a provable count of your German days on your iPhone.
How German tax residency actually works
Germany's Fiscal Code (Abgabenordnung, or AO) makes you fully taxable - "unlimited tax liability" on your worldwide income - if either of two tests is met. There is no points system and no ties table like the UK's, just two blunt questions:
- Wohnsitz (Section 8 AO): do you have a dwelling in Germany that is at your disposal? There is no minimum number of days attached to this test at all.
- Gewöhnlicher Aufenthalt (Section 9 AO): is Germany your habitual abode? A continuous stay of more than six months settles the question automatically.
Meeting either one is enough. Nationality is irrelevant, and registering your address (Anmeldung) is only an indicator - the tax office looks at objective facts, so you can be resident without ever registering, and deregistering does not by itself end residency. The tax year is the calendar year.
The Wohnsitz trap: a dwelling with no day minimum
Section 8 is the trap most expats miss. You have a Wohnsitz if you maintain a dwelling under circumstances suggesting you will keep and use it. What matters most is what is missing from that definition: there is no day threshold anywhere in it.
- Ownership does not matter. Owned, rented, or simply made available to you by someone else - all of them qualify.
- Size does not matter. A modest furnished room can be enough if you can live and sleep there and it is kept available for you; a hotel room generally is not.
- Presence barely matters. The test is availability. German case law has treated keeping the keys to a flat that remains usable and at your disposal as enough - you can spend the whole year abroad and still have a Wohnsitz.
That is why the classic move-abroad mistake is keeping the old apartment "just in case". If the lease keeps running, the furniture stays and you keep the keys, the Finanzamt can argue you never left. Ending a Wohnsitz means genuinely giving the dwelling up: terminate the lease, sell, or rent it out so it is no longer available to you. And residency starts immediately - from the day a dwelling is at your disposal, not on day 183.
Habitual abode: the six-month clock that crosses New Year
If you have no dwelling, Section 9 catches physical presence instead. You have your habitual abode where you stay in a way that shows you are not merely passing through - and the law adds a hard rule: a continuous stay of more than six months is always treated as a habitual abode, applied retroactively from the first day of the stay. Three details make this stricter than the per-year 183-day test most countries use:
- It is continuous, not per calendar year. Arrive on 1 October and stay until mid-April and you have roughly 92 days in one calendar year and 105 in the next - under 183 in each - yet you are still German tax resident, because the unbroken run passed six months.
- Short interruptions do not reset it. A holiday, a family visit or a business trip abroad is simply ignored; the clock keeps running through it.
- It is retroactive. Cross the line and residency is deemed to have started on day one of the stay, pulling months of already-earned income into the German net.
One narrow relief exists: a stay made exclusively for visiting, recreation, a health cure or a similar private purpose creates a habitual abode only if it lasts over a year. Do not stretch it - working remotely from a German flat is work, not a private visit, and the exception falls away.
The calendar year, treaties and moving out
German residency is assessed against the calendar year, with no UK-style split-year regime: in the year you arrive or leave, you are taxed as a resident for the resident part, and income from the non-resident part can still raise the rate applied to your German income under the progression clause.
If Germany and another country both claim you, the double tax treaty decides. Germany has one of the largest treaty networks in the world, and most of its treaties follow the OECD ladder: permanent home, then centre of vital interests, then habitual abode, then nationality, then mutual agreement. Your day records feed directly into that third step.
One more point for leavers: German citizens who move to a low-tax jurisdiction after being resident for at least five of the previous ten years can face extended limited tax liability on German-connected income for up to ten years. The residence tests themselves are stable law - Sections 8 and 9 AO remain unchanged as of mid-2026, so there is no reform to wait out.
Track your German days automatically
The Wohnsitz question turns on facts no tracker can decide for you. The habitual-abode question is pure day-counting, and that is exactly what Tax Residency Tracker automates:
- Automatic GPS detection notices when you enter and leave Germany and creates a dated German stay for each visit, even while the app is closed.
- A continuous day history keeps every German run as dated stays, so a stretch from October to April shows up as the six-month-plus run it really is - not as two harmless-looking calendar-year totals.
- Real-time totals show your German day count as it stands today, alongside every other country you spend time in.
- Planned-stay previews let you add a future trip - say, November to April in Berlin - and see before you book whether it creates a continuous stay of more than six months.
- Alerts warn you as you approach a threshold, not after you have crossed it.
- Documents and CSV export let you attach tickets, bookings and scans to stays and hand your adviser a dated, evidenced record if the Finanzamt ever asks where you were.
Everything is processed on your device and never uploaded, with optional iCloud sync through your own private account, so your location history stays yours while still being audit-ready.
Frequently asked questions
Does Germany's 183-day rule reset on 1 January?
No. The six-month habitual-abode period is continuous and runs straight across the year end, so a stay from autumn to spring can make you resident even though neither calendar year alone shows 183 days.
I kept my apartment in Germany while living abroad. Am I still tax resident?
Very possibly, if it remained at your disposal - the Wohnsitz test has no day minimum, and keeping the keys to a usable flat can be enough. To end it, give the dwelling up genuinely: end the lease, sell, or rent it out so you cannot simply move back in.
Do short trips out of Germany reset the six-month clock?
No. Short interruptions such as holidays, business trips or family visits are disregarded, and the stay still counts as one continuous period.
What if Germany and another country both consider me resident?
The applicable double tax treaty breaks the tie, usually in this order: permanent home, centre of vital interests, habitual abode, nationality, then mutual agreement. Day-count evidence feeds directly into the habitual-abode step, so keep a documented record of where you were.
Next, read the 183-day rule explained, see how the Schengen 90/180 rule works - Germany is a Schengen state, so visa-free visitors face that ceiling too - learn how tax treaty tie-breaker rules resolve dual residency, or browse all tax-residency guides.