Housing costs
Rent reduction simulator
Estimate whether a Swiss reference-rate change could justify asking your landlord for a lower rent.
CHF/mo
Exclude heating and ancillary charges%
%
%
%
months
Potential yearly rent reduction
CHF 1'164
Estimated claim: 4% or CHF 97/month. New net rent could be around CHF 2'303/month.
Rate effect before offsets
5.7%
Offsets modelled
1.7%
Landlord response window
30 days
What Warren would do next
•Find the reference rate used in your lease or last rent-change notice.
•Check whether inflation, landlord cost increases, index clauses, or special rent types weaken the claim.
•Draft the registered-letter request before the next termination date.
•Track the landlord response and escalation deadline. Your notice period is modelled as 3 months.
Methodology: Uses the federal reference-rate rule: a 0.25 percentage-point drop generally creates a 2.91% rent reduction claim before offsets. Landlords can offset eligible inflation and cost increases; index, stepped, subsidised, or luxury rents need special handling.
Turn estimate into action
Warren helps you capture the saving for real.
This simulator gives you a first estimate. Join early access to get a real profile, action tracking, and step-by-step guidance tailored to Switzerland when Warren launches.
Potential yearly rent reduction
CHF 1'164