How high the rent burden in Berlin really is depends on which rents you look at. The headline rental figure alone says little. What matters is the rent-to-income ratio: gross cold rent as a share of disposable household net income.
Three datasets, three perspectives
Our analysis uses three different rental benchmarks:
The official rent index (Mietspiegel) assumes an average citywide rent of 5.84 euros per square meter (as of 2015). This figure primarily reflects existing lease agreements. The BBU company data (Market Monitor 2015) represents the organized rental housing market. The asking rents we calculated for 2015 show what landlords charge on new leases in the open market.
The gap between these figures is substantial. While the rent burden based on the rent index appears moderate, asking rents in high-demand locations can consume 40 to 50 percent of net household income.
Large differences between boroughs
In inner-city boroughs like Mitte or Friedrichshain-Kreuzberg, the gap between existing and asking rents is particularly wide. Inbound migration drives new lease prices upward. In up-and-coming locations like Neukoelln, asking rents are also rising steadily. For new tenants, the rent-to-income ratio there can quickly exceed 40 percent. For sitting tenants with older leases, the picture looks considerably better.
Why the ratio is rising
Berlin has been growing continuously for twelve years. At the same time, average household sizes are shrinking, which further increases demand for apartments. Rising demand meeting slowly expanding supply leads to higher rents. The public debate frames this development in terms of gentrification and displacement.
Strong demand, growing political pressure
For landlords, strong demand signals security in letting and potential for rent increases. At the same time, political pressure to regulate rent development is growing, especially where new-lease rents already absorb 40 to 50 percent of net household income. A sustainable return requires rents that remain affordable for the target group over time. Owners and investors should therefore factor local purchasing power and rent-to-income ratios into their calculations.
