Kaution in Germany: Rental Deposit Rules, Explained
The German rental deposit (Kaution) is one of the most misunderstood parts of renting as a newcomer — landlords sometimes ask for more than they're legally allowed to, or demand it all up front. Here's what the law actually says.
The 3-month legal cap
Under German civil law (§551 BGB), a residential Kaution cannot legally exceed three months' cold rent (Kaltmiete) — the base rent before utilities (Nebenkosten) are added. If your contract asks for more, that clause is invalid regardless of your signature, though enforcing that in practice can require pushing back in writing or getting tenant-association (Mieterverein) advice.
You can pay it in instalments
Tenants have a legal right to split the deposit into up to three equal monthly instalments, with the first payment due when the tenancy starts. Many landlords will still ask for the full amount upfront by default — you're allowed to request the instalment schedule instead, and it's worth doing if the lump sum is a stretch during an already expensive relocation.
Where the money has to go
Your landlord cannot simply keep your deposit in their personal or business account mixed with other funds. It must be held separately — commonly in an interest-bearing deposit account (Kautionskonto) — so that it's protected if the landlord becomes insolvent, and so any interest earned is legally yours (though in practice, low interest rates mean this is often a token amount).
Alternative arrangements exist too — such as a deposit guarantee insurance (Kautionsversicherung/Mietkautionsbürgschaft), where you pay an annual premium to a provider instead of tying up cash — but these are optional and typically only worth it if you're short on upfront liquidity, since you never get the premium back.
Getting your deposit back
There's no single fixed legal deadline for returning a deposit, but German courts generally treat up to 6 months after move-out as a reasonable window — long enough for the landlord to inspect for damage beyond normal wear and tear and settle the final utility bill (Nebenkostenabrechnung), which can affect how much they're owed. Unexplained delays well beyond that can usually be challenged, and keeping dated move-in/move-out photos is your best protection against disputed damage claims.
Questions people actually ask
How much can a German landlord charge for Kaution?
By law (§551 BGB), a residential deposit in Germany cannot exceed three months' cold rent (Kaltmiete, i.e. rent excluding utilities). Any deposit clause asking for more than that is legally invalid, even if you signed it.
Can I pay my Kaution in instalments?
Yes — German law gives tenants the right to pay the deposit in up to three equal monthly instalments, the first due at the start of the tenancy. Landlords cannot legally demand the full amount up front, though many still ask, and it's worth knowing you can push back.
Where does my deposit money have to be held?
Landlords must keep the deposit separate from their own assets, typically in an interest-bearing account (Kautionskonto) or an escrow-style arrangement, so it isn't at risk if the landlord becomes insolvent. Ask for written confirmation of where it's held.
How long does it take to get a deposit back in Germany?
There's no fixed legal deadline, but German courts generally treat a reasonable settlement period as up to 6 months after move-out, giving the landlord time to check for damage and settle the final utility bill (Nebenkostenabrechnung). Longer delays without justification can usually be challenged.
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