Understanding & negotiating clauses: index, step, value-protection and option clauses.
Commercial leases are largely freely negotiable — residential tenant protections do not apply. That makes individual clauses all the more decisive for your costs over the next five to fifteen years: CPI indexation, stepped rent, option and extension rights, written vs. text form. This topic hub explains the key lease clauses from the tenant's perspective — with worked examples, current German Federal Court case law, and the statutory changes you should know before signing or extending.
A March 2026 ruling by Germany's Federal Court of Justice strengthens commercial tenants: standard-form value-protection clauses are subject to fairness review — if they fail it, they are void from the outset, and overpaid rent can be reclaimed. Explained from the tenant's side.
For decades the “written-form trap” was the most feared formality problem in German commercial tenancy law – one unsigned amendment could unravel a 10-year lease term. Since the text-form reform, a new regime applies. This fact check debunks four persistent myths.
How you, as a commercial tenant, can check an index-based rent increase against the consumer price index yourself – with formula, example table and the legal guardrails of the Price Clause Act.
Which rent-adjustment model better protects commercial tenants against rising costs – the predictable graduated rent or the inflation-linked index rent? The comparison from a tenant's perspective.