Rent Reduction Possible – But Who Actually Claims It?
When the reference interest rate falls, many tenants in Switzerland can request a rent reduction – but in most cases, nothing happens automatically.
In brief
A rent reduction is possible in Switzerland if the reference interest rate has fallen since the last rent setting or adjustment. The key point is this: many reductions are not passed on automatically. Tenants usually have to actively request a lower net rent, observe deadlines and review the landlord’s response carefully.
What does rent reduction mean in Switzerland?
Rent reduction usually means a reduction of the net rent. The most important trigger is a lower mortgage reference interest rate. This reference rate is a central benchmark in Swiss tenancy law for rent adjustments in ongoing tenancy agreements.
A rent reduction generally applies to the net rent, not automatically to ancillary costs, advance payments or separate fees. Whether a claim exists depends on which reference interest rate the current rent is based on, whether cost increases have occurred since the last adjustment and whether value-enhancing investments can be taken into account.
Reference interest rate and claim: When is a reduction possible?
The current reference interest rate is 1.25 percent. Many tenancies saw rent increases in recent years because the reference interest rate rose. If the reference rate later falls again, tenants can check whether they can request a reduction.
Why many tenants do not request the reduction
Lack of awareness
Many tenants do not know which reference interest rate their rent is based on or that they must actively request the reduction.
Fear of effort
Calculations, deadlines and letters can seem complicated. In many cases, a clearly worded request is enough as a first step.
Avoiding conflict
Some tenants do not want to strain their relationship with the landlord and therefore waive a possible reduction.
Especially in a tight housing market, many tenants hesitate to make requests. Yet a factual request for a reduction is not an attack, but a legally recognised way to review the rent.
Claim a rent reduction or wait?
| Situation | Why claiming it makes sense | What should be checked |
|---|---|---|
| The rent was increased because of the reference rate | A later decrease can generally create a reduction claim | Last rent adjustment, previous reference rate and calculation |
| The tenancy agreement is based on a higher reference rate | The current lower rate may justify a reduction | Reference rate in the lease or in previous official forms |
| The landlord does not act automatically | Without a written request, the rent often remains unchanged | Document the letter, delivery and deadlines |
| The landlord claims cost increases | Offsetting is possible, but must be plausible | Check inflation, general cost increases, investments and explanation |
| Tenants fear conflict | A factual letter is legally provided for and common | Use a neutral tone, clear request and advice if unsure |
Step by step: How to request a rent reduction
- Check the tenancy agreement and the last rent adjustment: which reference interest rate was used?
- Compare the current reference interest rate with the previous rent basis.
- Look at the net rent separately from ancillary costs and advance payments.
- Consider possible offsets such as inflation, cost increases or investments.
- Send a written request for a rent reduction to the landlord.
- Request the reduction as of the next contractual termination date.
- Wait for the response and review the explanation carefully.
- In case of rejection, a partial offer or no response, contact the conciliation authority in good time.
Sample wording: Requesting a rent reduction due to the reference interest rate
The following sample text can be used as a starting point. The details should be adapted to the tenancy agreement, address, reference interest rate and termination date.
Subject: Request for reduction of the net rent
Dear Sir or Madam,
I / We rent the apartment at the following address:
[Address of the rental apartment]
The mortgage reference interest rate has fallen since the rent basis relevant to my / our tenancy was determined. I / We therefore request a corresponding reduction of the net rent as of the next possible termination date.
Please inform me / us in writing within 30 days how you calculate the new net rent and from which date the reduction will apply.
Kind regards,
[Name]
[Address]
[Date]Practical examples
Example 1: Rent was increased in 2023
A tenant received a rent increase in 2023 because the reference interest rate had risen. When the reference rate later fell again, she checked the previous increase and requested a reduction of the net rent in writing. The landlord may claim cost increases, but must justify them.
Example 2: Lease already based on 1.25 percent
A couple has lived in the same apartment since 2022 and never received an increase due to the reference interest rate. If the rent is already based on 1.25 percent, there may be no additional reduction claim based on the current reference rate. However, a review can still be useful if other factors are involved.
Checklist: Claiming a rent reduction correctly
Frequently asked questions about rent reductions in Switzerland
Summary
A rent reduction is possible in Switzerland if the reference interest rate has fallen compared with the relevant rent basis. However, many tenants do not receive the reduction automatically and must request it in writing. Anyone who checks the lease, last adjustment, net rent and deadlines can avoid unnecessarily high housing costs. It is important to proceed factually, review the landlord’s calculation and contact the conciliation authority in good time if the request is rejected.