The Day Your Notice Has to Arrive
German law does not count your notice from the day you post it. It counts back from the third working day of a calendar month, and in Berlin that day moves, because Saturdays count as working days here and the city keeps ten public holidays that do not. Pick the month you want your tenancy to end and this walks the three dates that follow: the day the letter has to be in the landlord’s hands, the rent still running until you hand over the keys, and the deposit clock that starts the moment you do.
The notice period itself is paragraph 573c of the German civil code: notice is admissible at the latest on the third working day of a calendar month, to the end of the month after next, and no contract may make that worse for a tenant. A working day is every day except Sunday and a public holiday, and the Federal Court of Justice confirmed on 27 April 2005, in case VIII ZR 206/04, that Saturday belongs in the count. The holiday list used here is the ten Berlin public holidays, including 8 March, which only Berlin and Mecklenburg-Vorpommern keep. The deposit figures come from paragraph 551 and the six month limitation from paragraph 548. Checked on 15 September 2026.
The three months everybody quotes is the least useful part of the rule. What decides your last month is a single day near the start of a month, and in Berlin it is rarely the 3rd. October 2026 opens with German Unity Day on a Saturday, so the third working day is Monday 5 October. January 2027 opens with a Friday holiday and a Saturday that counts, so it is Tuesday 5 January. In April and July 2027 the third working day is itself a Saturday, and the courts have never settled whether that pushes the deadline to the Monday, which is a good reason to deliver by the Friday. Every shift runs in your favour, never against you, and none of it helps if you were planning to post the letter on the 2nd and let the post office do the rest. What the law measures is arrival.
A working day is not a weekday
For this deadline a Werktag is every day except Sunday and a public holiday, which puts Saturday firmly in the count. That was settled by the Federal Court of Justice on 27 April 2005, and the reasoning was blunt: nothing in the wording, the legislative history or ordinary German usage supports treating Saturday like a Sunday. What the court did not settle is what happens when the third working day is itself a Saturday. That question is still open, so the safe move on those months is to have the letter delivered by the Friday before.
Berlin keeps a holiday the rest of Germany does not
The city has ten public holidays and one of them, 8 March for International Women’s Day, exists only here and in Mecklenburg-Vorpommern. A deadline calculator built for the rest of the country will get a March date wrong in Berlin. The other nine are New Year’s Day, Good Friday, Easter Monday, 1 May, Ascension Day, Whit Monday, 3 October and both Christmas days. Each one is subtracted before the count starts.
Arrival is what counts, not posting
A notice is a declaration that has to reach the other side before it does anything. It must be on paper and signed, because paragraph 568 of the civil code requires written form, and every person named as a tenant has to sign even if only one of them is leaving. A Rueckschein registered letter is the wrong instrument here: it needs somebody at home to sign, and a collection card in the letterbox is not delivery. An Einwurf-Einschreiben, which the postman simply posts and logs, is safer, and hand delivery with a witness is safer still.
The clause that cancels the whole thing
Many Berlin leases carry a Kuendigungsverzicht, a waiver of the right to give ordinary notice, usually for twelve or twenty-four months. While it runs, the third working day does nothing for you. In a standard form contract such a waiver is valid for four years at most, counted from the day the contract was signed rather than the day the tenancy began, and it has to bind both sides. Finding a replacement tenant does not create a right to leave early: a landlord is under no general obligation to accept one.
What the board cannot tell you
It reads the calendar, not your contract. It assumes an ordinary open-ended residential tenancy with the statutory tenant notice period, so a fixed term, a furnished short-let, a sublet or a company let can all sit outside it, and so can any waiver clause. It is a planning tool rather than legal advice. For a contested deposit or a clause you cannot read, the Berliner Mieterverein and the Mieterschutzbund both give members written advice for a small annual fee.
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Berlin Flat Notice Period: The Three Days That Decide Your Last Month
German law counts a tenant notice back from the third working day of a calendar month, and in Berlin that day moves, because Saturdays count as working days and the city keeps ten public holidays that do not. Missing it by a single day adds a whole month of rent.