Automatic Conversion, Not Renewal
'Renewal lease agreement' is a term that can be very misleading in the Dutch rental market. The system is not built on renewals but on the principle of automatic conversion to provide tenant security. If you have a fixed-term lease (e.g., for one year) and you and your landlord sign a 'renewal agreement' for another year, the law intervenes. This second agreement is not considered a new fixed-term lease. Instead, by law, your tenancy is automatically converted into a contract for an indefinite period (onbepaalde tijd) with full, permanent tenant protection (huurbescherming).
The Prohibition on Chaining ('Ketenregeling')
This automatic conversion is a result of the strict rules against 'chaining' temporary contracts (ketenregeling). A landlord is permitted to offer a tenant one initial fixed-term contract (for a maximum of two years). Any subsequent contract between the same parties for the same property is, by operation of law, an indefinite contract. This prevents landlords from keeping tenants in a perpetual cycle of temporary leases and uncertainty. The act of 'renewing' or 'extending' a temporary lease is precisely what triggers the conversion to a permanent one. A landlord cannot override this mandatory law with a contract clause.
What This Means for Tenants
This is a powerful protection. If your landlord offers to 'renew' your one-year contract, you should be aware that by signing it (or even just by staying and paying rent with the landlord's consent), you are gaining the security of an indefinite lease. You cannot be asked to leave at the end of the second year. This also means that the concept of negotiating terms upon 'renewal' is generally moot. The terms of the original agreement simply carry over into the new, indefinite contract, apart from legal annual rent increases.