Signing a German rental contract without understanding it is a risk. German rental law is tenant-friendly overall, but there are specific clauses that catch international students off guard.

The contract (Mietvertrag) will be in German. Get a translation before signing if your German is not strong enough to read legal text. Do not rely on the landlord's verbal summary of what the contract says.

Key things to check: the Mietbeginn (start date), the Miete (rent amount), and whether the listed amount is Kaltmiete (cold rent, excluding utilities) or Warmmiete (warm rent, including utilities). In Germany, Kaltmiete is most commonly listed in advertisements, and utilities are charged on top. Ask specifically what the Nebenkosten (additional costs) include and how much they are expected to be.

The Kaution (security deposit) is capped at three months of cold rent by law. Your landlord must hold this in a separate account that earns interest. When you leave, they can deduct for actual damage beyond normal wear and tear. The deposit must be returned within a reasonable period after the end of your tenancy.

Anmeldung: your landlord is required to provide you with a Wohnungsgeberbestätigung (landlord confirmation letter) so you can register your address at the Einwohnermeldeamt. If they refuse to provide this, it is a violation of German law. Landlords who rent illegally or sublet without permission sometimes try to avoid this step. Ask about it before signing.

Kündigungsfrist means the notice period. Most German tenancy contracts require three months' notice from the tenant. If you sign a contract for a fixed term (Zeitmietvertrag), you cannot leave early without penalty. Open-ended contracts (unbefristeter Mietvertrag) with three months notice are more common and more flexible.