The rent index is a reference for determining the local comparative rent. This protects tenants from unjustified rent increases and, on the other hand, ensures the economic viability of residential property.

Rent indexes serve as a reliable source of information for landlords and tenants through price transparency, as well as a local price barometer. In this way, investors and the real estate industry also benefit from rent rolls. Rent indices are an important point of reference both for new leases and for rent increases.

In Germany, cities with a population of 50,000 or more are required to maintain a rent index and make it available to tenants or landlords as needed. Since analog rent indexes involve far too much effort, digital solutions are being sought here as well.

The first solutions offer municipalities support in creating their rent index. Often, the rent index is integrated into an online portal where citizens can easily and reliably find out about the current situation. Automatic updates also ensure that the mirror is always up to date.